Multi-curvature part detection device for analog digital measurement and use method of multi-curvature part detection device

Abstract

The invention discloses an analog digital measurement multi-curvature part detection device and a use method thereof, and belongs to the technical field of aircraft sheet metal part manufacturing, and the device comprises a tire body, a positioning pin, a clamp, a gasket, an inner hexagon screw, a fixed drill bushing, a step pin, a go-no go gauge, a go-no go ball and the like. The method comprises the steps that firstly, two matched sheet metal parts are placed on the tire body, are positioned through the two positioning pins and then are pressed on the tire body through the clamp; and secondly, detecting the hole position degree of the part by using a positioning pin. And thirdly, detecting the surface profile tolerance of the part by using a pass-stop ball. Fourthly, if the surface profile tolerance of the sheet metal part cannot meet the requirement of the tolerance zone, a stress application wrench is used for applying stress to the sheet metal part through a gasket and an inner hexagon screw. And fifthly, detecting the surface profile tolerance of the sheet metal part again by using the go-no go ball after force application is completed, and detecting the edge line profile tolerance of the sheet metal part by using the go-no go gauge. The problems that a supporting tool is needed during digital measurement and the measurement error is large due to low rigidity of sheet metal parts are solved.

Description

Technical Field

[0001] The invention relates to a multi-curvature part detection device for analog digital measurement and a use method thereof, belonging to the technical field of manufacturing aircraft sheet metal parts. Background Art

[0002] The manufacturing process of multi-curvature parts on aircraft is relatively complicated, and the rigidity of the parts is low, so it is impossible to perform digital measurement of form and position tolerances in the natural state, and special molds need to be manufactured as support. In addition, the manufacturing tolerance range of sheet metal parts is relatively wide. Using digital measurement methods, the out-of-tolerance position is not easy to identify, and repeated measurement operations are complicated.

[0003] Therefore, for complex sheet metal parts such as multi-curvature parts, the digital measurement solution based on the datum for geometric tolerance measurement is inefficient, costly, and complex to operate. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-curvature part detection device for simulating digital measurement and a method for using the device. The device establishes a reference surface based on the reference specified in the design, and then uses a special measuring tool to measure the form and position tolerance instead of digital measurement. At the same time, the digital measurement of the part is simulated by a set of devices, which improves the detection efficiency of multi-curvature parts and reduces the production cost. The problem of low efficiency, high cost and complex operation of digital measurement of form and position tolerance of multi-curvature parts is solved.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A multi-curvature part detection device for analog digital measurement realizes the establishment of multi-curvature part benchmarks and analog measurement of form and position tolerances. The multi-curvature part detection device includes a carcass 01, a go / no-go gauge 02, a washer 03, a positioning pin 04, a stepped pin 05, a nut 06, a go / no-go ball 07, a fixed drill sleeve 08, a hexagon socket screw 09, a clamp 10, and a lifting eye screw 11. Specifically:

[0007] The carcass 01 is used to place sheet metal parts. There are four small circular grooves on the surface of the carcass 01. The positions of the small grooves are selected to meet the reference points of the parts. At the same time, an annular groove is provided on the outer side of the carcass surface 01. The shape of the annular groove is that the shape of the part extends outward with equal width on all sides. The eye screw 11 is fixed to the base of the carcass 01 by a threaded connection and is used as a medium for the mobile device. The step pin 05 is embedded in the small circular groove of the carcass 01, and the table of the step pin 05 is higher than the carcass surface 01. When the part is placed on the carcass 01, the part contacts the small cone of the step pin 05, leaving a gap with the surface of the carcass 01. The clamp 10 is embedded in the side wall of the carcass 01 by a threaded connection. When the clamp 10 applies force to clamp the part, the position where the clamp head of the clamp 10 contacts the part is just in the normal direction of the small boss of the step pin 05. The small cone of the step pin 05 establishes a reference plane for the part. The step pin 05 and the clamp 10 fix the part at a position with a certain gap from the tire body surface 01, and the part is fixed on the established reference plane.

[0008] Furthermore, the fixed drill sleeves 08 are provided in plurality, the number of which is the same as the number of holes in the part, and the drill sleeves 08 are all embedded in the matrix 01. The positioning pins 04 are provided in plurality, the number of which is the same as the number of holes in the part. After the part is fixed, two positioning pins 04, A1 and A2, are respectively inserted into two fixed drill sleeves 08 through two holes on the part. The centers of the two selected holes are the reference points of the part, and the positioning pins A1 and A2 are used for positioning, and the part is positioned on the two established reference planes. The positioning of the part in a spatial position that meets the reference requirements is achieved. The other positioning pins 04 are used to detect the position accuracy of other holes in the part. After the part is positioned, if the other positioning pins 04 can be smoothly inserted into the drill sleeve through the holes on the part, the hole position accuracy of the hole on the part meets the requirements.

[0009] Furthermore, the go and stop gauge 02 is a cylinder, which is used to detect the edge line profile of the part. The two ends of the go and stop gauge 02 have different sizes, one end is the through end, and the other end is the stop end. After the part is positioned, the through end and the stop end of the go and stop gauge 02 are placed in the groove outside the mold surface of the carcass 01 in sequence, and the groove is circled around the part shape. If the through end does not interfere with the edge of the part shape and the stop end cannot be inserted into every part of the groove, the edge line profile of the part shape meets the requirements.

[0010] Furthermore, there are two stop balls 07, namely K1 and K2. The stop balls 07 are used to detect the surface contour of parts. One end of the stop ball 07 is a small sphere, and the other end is a hand-held area. The diameters of the small spheres of the two stop balls 07 are different. The diameter of the K1 stop ball 07 is the size of the gap between the part and the surface of the carcass 01, and the diameter of the K2 stop ball 07 is the surface contour tolerance plus the gap value between the part and the surface of the carcass 01. After the parts are positioned, one end of the small spheres of the two stop balls 07 is placed in the gap between the part and the surface of the carcass 01 in turn. When the K2 stop ball 07 cannot pass through every gap and the K1 stop ball 07 can completely pass through every gap, the surface contour of the part meets the requirements.

[0011] Furthermore, the nut 06, washer 03 and hexagon socket screw 09 are provided in plurality, the number of which is consistent with the number of holes in the part, and the nut 06 is embedded in the carcass 01 and fixed below the drill sleeve 08. The nut 06, washer 03 and hexagon socket screw 09 are used to apply a certain external force to the part. When a certain force needs to be applied to the part, the washer 03 is on the outer surface of the part, the hexagon socket screw 09 passes through the washer 03 and the hole on the part in turn, and is fixed to the nut 06 through a threaded connection. The hexagon socket screw 09 is tightened by a torque wrench, and the force is transmitted to the surface of the part through the washer 03, so as to apply a certain force to the surface of the part.

[0012] A method for using a multi-curvature part detection device for analog digital measurement, comprising the following steps:

[0013] In the first step, two mating sheet metal parts are placed on the carcass 01, the parts are fixed using the clamp 10, and the parts are positioned using the two locating pins 04 A1 and A2.

[0014] In the second step, other locating pins 04 are used to detect the hole position of the sheet metal parts.

[0015] In the third step, if the hole position of the part detected in the second step meets the requirements, proceed to the fourth step, otherwise the part is unqualified.

[0016] The fourth step is to use the go / no-go gauge 02 to detect the edge profile of the sheet metal parts.

[0017] Step 5. If the edge line profile of the part detected in step 4 meets the requirements, proceed to step 6, otherwise the part is unqualified.

[0018] Step 6: Use the stop ball 07 to detect the surface contour of the sheet metal parts.

[0019] Step 7: If the surface profile of the sheet metal part detected in step 6 meets the requirements, the sheet metal part is qualified. If it does not meet the requirements, a certain force needs to be applied to the part, and the hexagon socket screw 09 needs to be tightened with a torque wrench to apply the allowable load to the sheet metal part.

[0020] Step 8. After the load is applied, use the stop ball 07 to check the surface contour of the sheet metal part again. If it meets the requirements, the sheet metal part is unqualified, otherwise the part is a defective product.

[0021] The beneficial effects of the present invention are:

[0022] The present invention realizes the creation of sheet metal part benchmarks and analog measurement of form and position tolerances through a set of devices, solving the problem that sheet metal parts have low rigidity, require support tooling during digital measurement, and have large measurement errors. The device is easy to operate and reduces costs, and is worth promoting in the aircraft sheet metal manufacturing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of the device structure of the present invention;

[0024] Figure 2 A top view of the device structure of the present invention;

[0025] Figure 3 It is a cross-sectional view of the device structure of the present invention taken along the AA direction;

[0026] Shown in the figure: 01 carcass, 02 go and stop gauge, 03 washer, 04 locating pin, 05 step pin, 06 nut, 07 go and stop ball, 08 fixing drill sleeve, 09 hexagon socket screw, 10 clamp, 11 lifting eye screw. DETAILED DESCRIPTION

[0027] To further illustrate the concept of the present invention, the specific implementation scheme of the present invention will be further described below in conjunction with the accompanying drawings. The multi-curvature parts detection device includes a carcass 01, a go / no-go gauge 02, a washer 03, a positioning pin 04, a stepped pin 05, a nut 06, a go / no-go ball 07, a fixed drill sleeve 08, a hexagon socket screw 09, a clamp 10, and a lifting eye screw 11. Specifically:

[0028] The carcass 01 is used to place sheet metal parts. There are four small circular grooves on the surface of the carcass 01. The positions of the small grooves are selected to meet the reference points of the parts. At the same time, an annular groove is provided on the outer side of the carcass surface 01. The shape of the annular groove is that the shape of the part extends outward with equal width on all sides. The eye screw 11 is fixed to the base of the carcass 01 by a threaded connection and is used as a medium for the mobile device. The step pin 05 is embedded in the small circular groove of the carcass 01, and the table of the step pin 05 is higher than the carcass surface 01. When the part is placed on the carcass 01, the part contacts the small cone of the step pin 05, leaving a gap with the surface of the carcass 01. The clamp 10 is embedded in the side wall of the carcass 01 by a threaded connection. When the clamp 10 applies force to clamp the part, the position where the clamp head of the clamp 10 contacts the part is just in the normal direction of the small boss of the step pin 05. The small cone of the step pin 05 establishes a reference plane for the part. The step pin 05 and the clamp 10 fix the part at a position with a certain gap from the tire body surface 01, and the part is fixed on the established reference plane.

[0029] Furthermore, the fixed drill sleeves 08 are provided in plurality, the number of which is the same as the number of holes in the part, and the drill sleeves 08 are all embedded in the matrix 01. The positioning pins 04 are provided in plurality, the number of which is the same as the number of holes in the part. After the part is fixed, two positioning pins 04, A1 and A2, are respectively inserted into two fixed drill sleeves 08 through two holes on the part. The centers of the two selected holes are the reference points of the part, and the positioning pins A1 and A2 are used for positioning, and the part is positioned on the two established reference planes. The positioning of the part in a spatial position that meets the reference requirements is achieved. The other positioning pins 04 are used to detect the position accuracy of other holes in the part. After the part is positioned, if the other positioning pins 04 can be smoothly inserted into the drill sleeve through the holes on the part, the hole position accuracy of the hole on the part meets the requirements.

[0030] Furthermore, the go and stop gauge 02 is a cylinder, which is used to detect the edge line profile of the part. The two ends of the go and stop gauge 02 have different sizes, one end is the through end, and the other end is the stop end. After the part is positioned, the through end and the stop end of the go and stop gauge 02 are placed in the groove outside the mold surface of the carcass 01 in sequence, and the groove is circled around the part shape. If the through end does not interfere with the edge of the part shape and the stop end cannot be inserted into every part of the groove, the edge line profile of the part shape meets the requirements.

[0031] Furthermore, there are two stop balls 07, namely K1 and K2. The stop balls 07 are used to detect the surface contour of parts. One end of the stop ball 07 is a small sphere, and the other end is a hand-held area. The diameters of the small spheres of the two stop balls 07 are different. The diameter of the K1 stop ball 07 is the size of the gap between the part and the surface of the carcass 01, and the diameter of the K2 stop ball 07 is the surface contour tolerance plus the gap value between the part and the surface of the carcass 01. After the parts are positioned, one end of the small spheres of the two stop balls 07 is placed in the gap between the part and the surface of the carcass 01 in turn. When the K2 stop ball 07 cannot pass through every gap and the K1 stop ball 07 can completely pass through every gap, the surface contour of the part meets the requirements.

[0032] Furthermore, the nut 06, washer 03 and hexagon socket screw 09 are provided in plurality, the number of which is consistent with the number of holes in the part, and the nut 06 is embedded in the carcass 01 and fixed below the drill sleeve 08. The nut 06, washer 03 and hexagon socket screw 09 are used to apply a certain external force to the part. When a certain force needs to be applied to the part, the washer 03 is on the outer surface of the part, the hexagon socket screw 09 passes through the washer 03 and the hole on the part in turn, and is fixed to the nut 06 through a threaded connection. The hexagon socket screw 09 is tightened by a torque wrench, and the force is transmitted to the surface of the part through the washer 03, so as to apply a certain force to the surface of the part.

[0033] The method for using the device comprises the following steps:

[0034] In the first step, two mating sheet metal parts are placed on the carcass 01, the parts are fixed using the clamp 10, and the parts are positioned using the two locating pins 04 A1 and A2.

[0035] The second step is to use other positioning pins 04 to detect the hole position of the sheet metal part. After the part is positioned, the other positioning pins 04 are inserted into the drill sleeve through the hole on the part. If the other positioning pins 04 can be inserted, the hole position of the part meets the requirements.

[0036] In the third step, if the hole position of the part detected in the second step meets the requirements, proceed to the fourth step, otherwise the part is unqualified.

[0037] The fourth step is to use the go and stop gauge 02 to detect the edge contour of the sheet metal part. After the part is positioned, the through end and the stop end of the go and stop gauge 02 are placed in the groove outside the carcass 01 profile in sequence. If the through end does not interfere with the edge of the part and the stop end cannot be inserted into every part of the groove, the edge contour of the part meets the requirements.

[0038] Step 5. If the edge line profile of the part detected in step 4 meets the requirements, proceed to step 6, otherwise the part is unqualified.

[0039] Step 6: Use K1 and K2 stop balls 07 to inspect the surface profile of sheet metal parts. After the parts are positioned, when the K2 stop ball 07 cannot pass through every gap between the part and the 01 carcass, and the K1 stop ball 07 can completely pass through every gap, the surface profile of the part meets the requirements.

[0040] Step 7: If the surface profile of the sheet metal part detected in step 6 meets the requirements, the sheet metal part is qualified. If it does not meet the requirements, a certain force needs to be applied to the part, and the hexagon socket screw 09 is tightened with a torque wrench to transfer the force to the surface of the part through the washer 03, and the sheet metal part is forced to the allowable load.

[0041] Step 8: After the load is applied, use the stop ball 07 to check the surface profile of the sheet metal part again. When the K2 stop ball 07 cannot pass through every gap between the part and the 01 carcass and the K1 stop ball 07 can completely pass through every gap, the surface profile of the part meets the requirements. If it meets the requirements, the sheet metal part is unqualified, otherwise the part is a defective product.

[0042] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A multi-curvature parts detection device for analog digital measurement, characterized in that: The multi-curvature parts detection device comprises a carcass (01), a go / no-go gauge (02), a washer (03), a positioning pin (04), a stepped pin (05), a nut (06), a go / no-go ball (07), a fixed drill sleeve (08), a hexagon socket screw (09), a clamp (10), and a lifting eye screw (11); specifically: The carcass (01) is used to place sheet metal parts. There are multiple circular grooves on the carcass (01) profile, and the positions of the grooves are consistent with the reference points of the parts. At the same time, an annular groove is provided on the outer side of the carcass (01) profile, and the shape of the annular groove is that the shape of the part extends outward with equal width on all sides. The eye screw (11) is connected and fixed to the carcass (01) base. The step pin (05) is arranged at the circular groove of the carcass (01), and the table of the step pin (05) is higher than the profile of the carcass (01). When the part is placed on the carcass (01), the part contacts the small round table of the step pin (05), and a gap is left with the profile of the carcass (01). The clamp (10) is arranged on the side wall of the carcass (01). When the clamp (10) applies force to clamp the part, the position where the clamp head of the clamp (10) contacts the part is in the normal direction of the small boss of the step pin (05). The small round table of the step pin (05) is processed to form a reference surface for fixing the part. There are multiple fixed drill sleeves (08), and the drill sleeves 08 are all embedded in the carcass (01); there are multiple positioning pins (04), and after the part is fixed, two positioning pins (04) are respectively inserted into two fixed drill sleeves (08) through two holes on the part, wherein the centers of the two holes are the reference points of the part, and the part is positioned by the positioning pins (04); other positioning pins (04) are used to detect the position of other holes of the part; The go / no-go gauge (02) is a cylinder and is used to detect the edge line profile of the part; The stop ball (07) is used to detect the surface profile of the parts, and there are two of them, namely K1 and K2; The nut (06), washer (03) and hexagon socket screw (09) are provided in plurality, the number of which is consistent with the number of holes in the part. The nut (06) is arranged on the carcass (01) and below the fixed drill sleeve (08). The nut (06), washer (03) and hexagon socket screw (09) are used to apply external force to the part.

2. The multi-curvature parts detection device of analog digital measurement according to claim 1 is characterized in that: The two ends of the go / no-go gauge (02) have different sizes, one end is the through end and the other end is the stop end. After the part is positioned, the through end and the stop end of the go / no-go gauge (02) are placed in the circular groove outside the mold surface of the carcass (01) in sequence, and the circular groove is used to surround the part shape. If the through end does not interfere with the edge of the part shape and the stop end cannot be inserted into every part of the groove, the edge line contour of the part shape meets the requirements.

3. The multi-curvature parts detection device of analog digital measurement according to claim 1 is characterized in that: The stop ball (07) has a small sphere at one end and a hand-held area at the other end. The small spheres of the two stop balls (07) are different in diameter. The diameter of the K1 stop ball (07) is the size of the gap between the part and the surface of the carcass (01), and the diameter of the K2 stop ball (07) is the surface profile tolerance plus the gap value between the part and the surface of the carcass (01). After the part is positioned, one end of the small spheres of the two stop balls (07) is placed in turn between the gap between the part and the surface of the carcass (01). When the K2 stop ball (07) cannot pass through the gap and the K1 stop ball (07) can completely pass through the gap, the surface profile of the part meets the requirements.

4. The multi-curvature parts detection device of analog digital measurement according to claim 1 is characterized in that: When it is necessary to apply force to a part, the washer (03) is on the outer surface of the part, the hexagon socket screw (09) passes through the washer (03) and the holes on the part in sequence, and is fixed on the nut (06). The hexagon socket screw (09) is tightened with a torque wrench to transfer the force to the surface of the part through the washer (03), thereby applying force to the surface of the part.

5. The multi-curvature parts detection device of analog digital measurement according to claim 1 is characterized in that: After the part is positioned by the positioning pin (04), if the other positioning pins (04) can be smoothly inserted into the drill sleeve through the hole on the part, the hole position accuracy of the hole on the part meets the requirement.

6. The multi-curvature parts detection device of analog digital measurement according to claim 1 is characterized in that: The number of the fixed drill sleeves (08) is the same as the number of the part holes; the number of the positioning pins (04) is the same as the number of the part holes.

7. A method for using the multi-curvature part detection device for analog digital measurement according to any one of claims 1 to 6, characterized in that: The following steps are involved: The first step is to place two mating sheet metal parts on the carcass (01), fix the parts with a clamp (10), and position the parts with two positioning pins (04); In the second step, other positioning pins (04) are used to detect the hole position of the sheet metal part; Step 3: If the hole position of the part detected in step 2 meets the requirements, proceed to step 4, otherwise the part is unqualified; Step 4: Use a go / no-go gauge (02) to inspect the edge profile of the sheet metal part; Step 5: If the edge line profile of the part detected in step 4 meets the requirements, proceed to step 6, otherwise the part is unqualified; Step 6: Use a stop ball (07) to detect the surface profile of the sheet metal part; Step 7: If the surface profile of the sheet metal part detected in step 6 meets the requirements, the sheet metal part is qualified; if it does not meet the requirements, it is necessary to apply force to the part, tighten the hexagon socket screw (09) with a torque wrench, and apply force to the sheet metal part to the allowable load; Step 8. After the load is applied, the surface profile of the sheet metal part is tested again using a stop ball (07). If it meets the requirements, the sheet metal part is unqualified. Otherwise, the part is a defective product.

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