Automatic measuring clamp for blade of support plate assembly

Abstract

The utility model relates to an automatic measuring clamp for a blade of a support plate assembly. The automatic measuring clamp comprises a measuring clamping tool, an automatic measuring tool and a positioning mechanism, the measurement clamping tool adopts an external expansion type clamping structure, and the part is fixed by tightly supporting an inner hole of the part; the upper end of the external expansion type clamping structure is a cylindrical external expansion part, and the lower end of the external expansion type clamping structure is provided with a clamping end; the automatic measuring tool is composed of a modified vice, and a semicircular groove is machined in a clamping jaw on one side of the modified vice and used for being matched with the clamping end of the lower end of the measuring and clamping tool. The measurement clamping tool and the automatic measurement tool are provided with three-direction positioning references, the Z-direction positioning surface and the angular surface are arranged at the corresponding positions of the measurement clamping tool, and the Y-direction positioning groove is arranged at the corresponding position of the automatic measurement tool; according to the technical scheme, the consistency of repeated clamping can be guaranteed; an automatic measuring line is adapted, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical measurement fixture technical field, concretely relates to a kind of automatic measurement fixture of support plate assembly vane. BACKGROUND

[0002] At present, the existing support plate assembly vane is detected by three coordinates, and the traditional fixture needs to clamp the surface of the part, which covers part of the measured characteristics, so that comprehensive detection cannot be realized. Manual clamping can introduce deviation, affecting the measurement accuracy, and is difficult to meet the needs of automatic measurement line. INVENTION CONTENTS

[0003] The utility model provides a kind of automatic measurement fixture of support plate assembly vane, and specific technical solutions are as follows:

[0004] An automatic measurement fixture of support plate assembly vane includes a measurement clamping tool, an automatic measurement tool and a positioning mechanism.

[0005] The measurement clamping tool adopts an outward expansion type clamping structure, which fixes the part by tightening the inner hole of the part. The upper end of the outward expansion type clamping structure is an outward expansion part in the form of a cylinder, and the lower end is provided with a clamping end, which is processed with a straight surface and a cylindrical surface to match the angular positioning of the automatic measurement tool.

[0006] The automatic measurement tool is composed of a modified vice, and one side of the vice jaw is processed with a semicircular groove to adapt to the clamping end of the lower end of the measurement clamping tool.

[0007] The measurement clamping tool and the automatic measurement tool are provided with three-way positioning references. The Z-direction positioning surface and the angular surface are arranged at the corresponding positions of the measurement clamping tool, and the Y-direction positioning groove is arranged at the corresponding position of the automatic measurement tool.

[0008] The measurement clamping tool and the automatic measurement tool are matched through the three-way positioning references to realize the complete constraint of the six degrees of freedom of the part.

[0009] The automatic measurement fixture of support plate assembly vane has the following preferred scheme: the outward expansion part is composed of a base, an internal expansion chuck and a driving mechanism.

[0010] The base end face is provided with a guide groove, the internal expansion chuck is arranged in the guide groove, the base inner cavity is provided with a slide way, a wedge-shaped sliding block is arranged on the slide way, the base side wall is open, and the guide groove and the inner cavity of the base are throughly arranged.

[0011] The internal expansion chuck is composed of at least four arc-shaped expansion blocks uniformly distributed on the circumference, and each expansion block is processed with a tapered groove on the inner side.

[0012] The driving mechanism includes a central cone and an adjusting screw, and the tapered surface of the central cone is matched with the tapered groove of the expansion block.

[0013] The adjusting screw is connected with the driving center cone through thread connection at one end and with a cam at the other end; the cam cooperates with the wedge-shaped slider, and the end face of a bolt passing through the opening of the side wall of the base abuts against the wedge-shaped slider, so that the wedge-shaped slider is pushed by the bolt to drive the center cone to move axially and force the internal expansion chuck to expand outward along the guide groove, thereby realizing the expansion of the inner hole.

[0014] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the diameter of the internal expansion chuck in the expanded part of the measurement clamp tool is consistent with the theoretical value of the center hole of the part, and the tolerance range is ±0.2 mm.

[0015] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the diameter of the semicircular groove is equal to the diameter of the cylindrical surface of the clamping end of the lower end of the measurement clamp tool, and the tolerance range is ±0.05 mm, so as to ensure the coaxiality during clamping.

[0016] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the Z-direction positioning surface is a plane formed by milling and is used for limiting the freedom degree of the part in the height direction; the Y-direction positioning groove is a reference groove formed by milling and is used for limiting the horizontal translation of the part by closely cooperating with the side surface of the measurement clamp tool; and the angular surface is a reference surface formed by milling and is used for limiting the rotational freedom degree of the part.

[0017] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the width of the Y-direction positioning groove is consistent with the thickness of the side surface of the measurement clamp tool, and the tolerance range is ±0.1 mm, so as to eliminate the horizontal displacement deviation.

[0018] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the expanded part is made of elastic material, and the clamping force can be adjusted to adapt to the inner holes of parts with different tolerance ranges.

[0019] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the side surface of the automatic measurement tool is provided with a rotating handle, the clamping jaw is moved by rotating the handle, and the quick locking and releasing of the measurement clamp tool are realized.

[0020] The preferred scheme of the automatic measurement clamp for the blade of the support plate assembly is that the surface roughness Ra of the three-direction positioning reference is ≤1.6 μm, so as to ensure the accuracy of the positioning contact surface.

[0021] The preferred scheme of the automatic measurement clamp of the blade of the support plate assembly is that the inner wall of the semicircular groove of the automatic measurement tool is provided with a hard alloy coating, the thickness of the coating is 0.2mm-0.3mm, the hardness is above HRC60, the parallelism tolerance of the axis of the semicircular groove to the reference surface of the automatic measurement tool is 0.01mm, and the diameter tolerance of the semicircular groove is H7 level.

[0022] Beneficial effects

[0023] The technical scheme of the utility model has the advantages of simple structure, easy operation, low manufacturing cost, easy assembly of parts, avoidance of contact with the outer surface of the part through outward expansion clamping, guarantee of unobstructed three-coordinate detection features, cooperative action of the three-direction positioning reference and the combined clamping structure, and repeatability clamping precision of less than or equal to 0.05mm. The structure solves the contradiction between clamping stability and measurement feature exposure, guarantees the consistency of repeated clamping, and is suitable for automatic measurement lines and improves detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a part and automatic measurement clamp exploded view;

[0025] Figure 2 It is a kind of automatic measurement clamp structure schematic view of blade of support plate assembly;

[0026] Figure 3 It is automatic measurement tool structure schematic view;

[0027] Figure 4 It is measurement clamping tool structure schematic view;

[0028] Figure 5 It is measurement clamping tool plan view;

[0029] Figure 6 It is base internal structure schematic view;

[0030] Figure 7 It is drive mechanism structure schematic view.

[0031] Figure 1 Middle: 1-measurement clamping tool, 2-automatic measurement tool, 3-semicircular groove, 4-clamping end, 5-Z direction positioning surface, 6-angular surface, 7-Y direction positioning groove, 8-base, 9-inner expansion chuck, 10-guide groove, 11-slideway, 12-wedge-shaped sliding block, 13-center cone, 14-adjusting screw, 15-cam, 16-tightening bolt, 17-cylindrical surface, 18-rotary handle. DETAILED DESCRIPTION

[0032] The utility model makes further description to the utility model in combination with the drawings in the utility model, but should not be understood as the main body range of the utility model is limited to the following embodiments. In the case of not departing from the thought of the utility model, according to the ordinary technical knowledge and usual means in the art, various substitutions and changes are made, and all should be included in the protection scope of the utility model.

[0033] As Figures 1-7 The utility model discloses an automatic measurement fixture of support plate assembly vane, including measurement clamping tool 1, automatic measurement tool 2 and positioning mechanism,

[0034] Measurement clamping tool 1 adopts the outer expansion type clamping structure, and the inside hole of the supporting part is fixed by the supporting part, and the upper end of the outer expansion type clamping structure is the outer expansion part in the cylindrical shape, and the lower end is equipped with the clamping end 4, and the straight surface and the cylindrical surface are processed to match the angular orientation of the automatic measurement tool 2,

[0035] Automatic measurement tool 2 is composed of the modified vice, and the half circular groove 3 is processed on one side of the vice, to adapt the clamping end 4 of the lower end of measurement clamping tool 1,

[0036] Measurement clamping tool 1, automatic measurement tool 2 are equipped with three orientation reference, and Z orientation face 5, angular face 6 are arranged at the corresponding position of measurement clamping tool 1, and Y orientation groove 7 is arranged at the corresponding position of automatic measurement tool 2,

[0037] Measurement clamping tool 1 and automatic measurement tool 2 are matched through three orientation reference, and the six degrees of freedom of the part is completely constrained.

[0038] The outer expansion part is composed of base 8, inner expansion chuck 9 and driving mechanism,

[0039] The end surface of base 8 is equipped with guide groove 10, and inner expansion chuck 9 is arranged in guide groove 10, and the inner cavity of base 8 is equipped with slide 11, and wedge-shaped sliding block 12 is arranged on slide 11, and the sidewall of base 8 is opened, and the guide groove 10 of base 5 is throughly arranged with the inner cavity,

[0040] Inner expansion chuck 9 is evenly distributed on the circumference by at least four arc-shaped expansion blocks, and the inside of each expansion block is processed with tapered groove,

[0041] The driving mechanism includes center cone 13 and adjusting screw 14, and the tapered surface of center cone 13 is matched with the tapered groove of expansion block,

[0042] The adjusting screw 14 drives the center cone 13 to move axially through the threaded connection at one end, and connects the cam 15 at the other end; the cam 15 cooperates with the wedge-shaped slider 12, and the end face of the jacking bolt 16 is pressed against the wedge-shaped slider 12 through the opening in the side wall of the base 8, and the wedge-shaped slider 12 is pushed by the jacking bolt 16, thereby driving the center cone 13 to move axially, forcing the internal expansion chuck 9 to expand outward along the guide groove 10, and realizing the expansion of the inner hole.

[0043] The diameter of the internal expansion chuck 9 in the expanded part of the measuring and clamping tool 1 is consistent with the theoretical value of the center hole of the part, and the tolerance range is ±0.2mm.

[0044] The diameter of the semicircular groove 3 is equal to the diameter of the cylindrical surface 17 of the clamping end 4 of the lower end of the measuring and clamping tool 1, and the tolerance range is ±0.05mm, which is used to ensure the coaxiality of clamping.

[0045] The Z-direction positioning surface 5 is a plane formed by milling, which is used to limit the height direction freedom of the part; the Y-direction positioning groove 7 is a reference groove formed by milling, which tightly cooperates with the side surface of the measuring and clamping tool, and is used to limit the horizontal translation of the part; the angular surface 6 is a reference surface formed by milling, which is used to limit the rotational freedom of the part.

[0046] The width of the Y-direction positioning groove 7 is consistent with the thickness of the side surface of the measuring and clamping tool 1, and the tolerance range is ±0.1mm, which is used to eliminate the horizontal displacement deviation.

[0047] The expanded part is made of elastic material, and the tightening force can be adjusted to adapt to the inner holes of parts with different tolerance ranges.

[0048] The side surface of the automatic measuring tool 2 is provided with a rotating handle 18, which moves the clamping jaw by rotating, and realizes the quick locking and releasing of the measuring and clamping tool 1.

[0049] The surface roughness Ra of the three-direction positioning reference is ≤1.6μm, to ensure the accuracy of the positioning contact surface.

[0050] The inner wall of the semicircular groove 3 of the automatic measuring tool is provided with a hard alloy coating, the coating thickness is 0.2mm-0.3mm, the hardness is above HRC60, the parallelism tolerance of the axis of the semicircular groove 3 and the reference surface of the automatic measuring tool is 0.01mm, and the diameter tolerance of the semicircular groove 3 is H7 level.

Claims

1. An automated measurement fixture for a vane of a strake assembly, the fixture comprising: The measuring clamping tool, the automatic measuring tool and the positioning mechanism are included; The measuring clamping tool adopts an outward expansion type clamping structure to fix the part through the inner hole of the part; the upper end of the outward expansion type clamping structure is an outward expansion part in a cylindrical shape, and the lower end is provided with a clamping end and is processed with a straight surface and a cylindrical surface to match the angular positioning of the automatic measuring tool; The automatic measuring tool is composed of a modified vice, and a semicircular groove is processed on one side of the clamping jaw to adapt to the clamping end of the lower end of the measuring clamping tool; Three-direction positioning references are arranged on the measuring clamping tool and the automatic measuring tool, and a Z-direction positioning surface, an angular surface and a Y-direction positioning groove are arranged at corresponding positions of the measuring clamping tool and the automatic measuring tool; The measuring clamping tool and the automatic measuring tool are matched through the three-direction positioning references to realize complete constraint of six degrees of freedom of the part.

2. An automated measurement fixture for a vane of a strut assembly according to claim 1, wherein, The outward expansion part is composed of a base, an inner expansion chuck and a driving mechanism; A guide groove is arranged on the end surface of the base, the inner expansion chuck is arranged in the guide groove, a slide is arranged in the inner cavity of the base, a wedge-shaped slide block is arranged on the slide, the side wall of the base is provided with an opening, and the guide groove and the inner cavity of the base are arranged in communication; The inner expansion chuck is composed of at least four arc-shaped expansion blocks which are uniformly distributed on the circumference, and a tapered groove is processed on the inner side of each expansion block; The driving mechanism includes a central cone and an adjusting screw, and the tapered surface of the central cone is matched with the tapered groove of the expansion block; One end of the adjusting screw is connected with the central cone through threads to drive the central cone to move axially, and the other end of the adjusting screw is connected with a cam; the cam is matched with the wedge-shaped slide block, a jacking bolt passes through the opening of the side wall of the base and is abutted on the end surface of the wedge-shaped slide block, the wedge-shaped slide block is pushed through the jacking bolt, the central cone is driven to move axially, the inner expansion chuck is forced to expand outward along the guide groove, and the inner hole is expanded.

3. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, The diameter of the inner expansion chuck in the outward expansion part of the measuring clamping tool is consistent with the theoretical value of the center hole of the part, and the tolerance range is ±0.2mm.

4. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, The diameter of the semicircular groove is equal to the diameter of the cylindrical surface of the clamping end of the lower end of the measuring clamping tool, and the tolerance range is ±0.05mm, which is used to ensure the coaxiality of clamping.

5. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, The Z-direction positioning surface is a plane formed by milling, which is used to limit the degree of freedom of the part in the height direction; the Y-direction positioning groove is a reference groove formed by milling, which is matched with the side surface of the measuring clamping tool to limit the horizontal translation of the part; and the angular surface is a reference surface formed by milling, which is used to limit the rotational degree of freedom of the part.

6. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, The width of the Y-direction positioning groove is consistent with the thickness of the side surface of the measuring clamping tool, and the tolerance range is ±0.1mm, which is used to eliminate the horizontal displacement deviation.

7. An automated measurement fixture for a vane of a strake assembly as defined in claim 2, wherein, The outward expansion part is made of elastic material, and the clamping force can be adjusted to adapt to the inner holes of parts with different tolerance ranges.

8. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, A rotating handle is arranged on the side surface of the automatic measuring tool, the clamping jaw is moved by rotating the handle, and the quick locking and releasing of the measuring clamping tool are realized.

9. An automated measurement fixture for a vane of a strake assembly as defined in claim 1, wherein, The surface roughness Ra of the three-direction positioning reference is less than or equal to 1.6μm to ensure the accuracy of the positioning contact surface.

10. An automated measurement fixture for a vane of a strut assembly according to claim 1, wherein, The inner wall of the semicircular groove of the automatic measuring tool is provided with a hard alloy coating, the thickness of the coating is 0.2mm-0.3mm, the hardness is above HRC60, the parallelism tolerance between the axis of the semicircular groove and the reference surface of the automatic measuring tool is 0.01mm, and the diameter tolerance of the semicircular groove is H7 level.

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