Length measuring device for arc-shaped transition angular piece

Abstract

The invention discloses a length measuring device for an arc-shaped transition angular part. The length measuring device comprises a foundation plate, a positioning mechanism, a pressing mechanism, a rotating mechanism and a vernier caliper, during testing, a tested part is pressed by the pressing mechanism, the non-test arm is arranged on the step of the angle block I or the steps of the angle block I and the angle block II, the test arm abuts against the outer end face of the cross arm of the fixing block, and the two tested ends of the test arm are located on the central axis of the fixing shaft I and the central axis of the fixing shaft II respectively. At the moment, the size displayed on the main scale and the vernier scale is the length of the two tested ends of the test arm. The device is simple in structure, easy to manufacture and low in cost; moreover, the device is simple in operation, is high in measurement speed, is low in requirement for the professional level of measurement personnel, and is more suitable for the detection and measurement of a large batch of arc-shaped bent angular parts.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring the length of parts, and relates to a device for measuring the distance between the end face where the two arms of a single-angle arc transition angle piece are located and the intersection line of two inner end faces or the intersection line of two outer end faces, or the distance between one side of a polygon such as a triangle or a quadrilateral and two intersection lines of two adjacent sides. Background Art

[0002] The single-angle pieces formed by bending and the components formed by multiple single-angle pieces are generally arc-shaped transition angles, such as Figure 1 For the single-angled angular parts shown in the figure, the technical parameters marked by the designer on the drawing are generally the size of the distance L2 or L1 between the two arm end faces and the intersection lines of the two inner end faces or the two outer end faces, and the distance between one side of a polygon such as a triangle or quadrilateral and the two intersection lines of the adjacent two sides, such as Figure 2 The trapezoid shown, Figure 3 For the triangle, the technical parameters marked by the designer on the drawing are generally the distances L3, L4 and L5 between one side and the two intersection lines of the adjacent two sides. In order to ensure the accuracy of the arc-shaped transition single-angle angle piece and the components formed by multiple single-angle angle pieces, it is necessary to measure the lengths of L2, L1, L4, L3 and L5 of the manufactured arc-shaped transition angle piece, and then compare them with the L2, L1, L4, L3 and L5 values ​​marked on the design drawing. As long as the error is within the specified error range, the accuracy of the arc-shaped transition angle piece and the components formed by multiple angle pieces can be guaranteed. The existing lengths of L2, L1, L4, L3 and L5 are measured using a three-coordinate measuring machine. Each dimension measurement requires three surface measurements, such as the end face of one arm, two inner end faces or two outer end faces of an arc-shaped transition single-angle angular part. Three points need to be taken to determine each surface, so nine points are needed to measure the arc-shaped transition angular part L2 or L1. The same is true for the measurement of trapezoidal L4, L3 and triangle L5. The operation is complicated and requires professional computer skills to operate. The measurement speed is slow. When measuring large quantities of parts, the measurement efficiency is extremely low. In addition, the price of the three-coordinate measuring machine is high and the measurement cost is high. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a length measuring device for arc-shaped transition angle parts. The measuring device has a simple structure, is easy to manufacture, and has low cost. It is also simple to operate, has a fast measuring speed, and has low requirements on the professional level of the measuring personnel. It is more suitable for the detection and measurement of large quantities of arc-shaped transition angle parts.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a length measuring device for arc-shaped transition angle pieces, comprising a base plate, a positioning mechanism, a clamping mechanism, a rotating mechanism and a vernier caliper; The upper end surface of one end of the base plate is uniformly and cross-embedded with penetrating transverse T-shaped grooves and non-penetrating vertical T-shaped grooves, and the upper end surface of the base plate is also provided with a transverse T-shaped track and a fixed light hole with an interference fit with the fixed shaft I; The positioning mechanism includes a fixed block, a fixed shaft I, an angle block I, an extension block I and a fastening screw I; the main body of the fixed block is L-shaped, a circular boss protrudes from the lower end of its corner, another fixed light hole with interference fit with the fixed shaft I is opened in the center of the circular boss, a guide angle that does not interfere with the fixed light hole is set at the outer end of the corner, and a main scale fixing hole is opened at the outer end of the vertical arm; the angle block I is stepped, a semicircular boss I protrudes from the bottom of one end of the step horizontal arm, and a groove I is recessed at the end of the step vertical arm; a light hole I and a threaded blind hole I that match the fastening screw I are opened on the upper and lower walls of the groove I, and a micro gap with the fixed shaft I is opened on the semicircular boss I The extension block I has one end higher and narrower than the other end, and the short end matches the groove I and is provided with a vertically through-hole and a threaded hole for matching with the fastening screw I; the circular boss of the fixing block overlaps the semicircular boss of the angle block I and is fixed to the base plate by the fixing shaft I, and the short end of the extension block I is inserted into the groove I of the angle block I and is fixed to the angle block I by the fastening screw I; the inner side surface of the extension block I and the step vertical surface of the angle block I are in the same plane; the intersection line of the extended surface of the step vertical surface of the angle block I and the extended surface of the outer end surface of the cross arm of the fixing block coincides with the central axis of the fixing shaft I; The rotating mechanism includes a moving block, an angle block II, a fixed shaft II, an extension block II and a fastening screw II; the moving block includes a horizontally placed U-shaped body, two circular lugs integrally formed on the lower end wall of the U-shaped body, the two circular lugs are provided with interlocking fixing holes that are interference fit with the fixed shaft II, the lower end surface of the U-shaped body is provided with a T-shaped groove used in conjunction with the horizontal T-shaped track of the base plate, and the upper end surface is provided with a vernier fixing hole; the angle block II is stepped, the upper end surface of its step cross arm is flush with the upper end surface of the step cross arm of the angle block I, and a semicircular boss II protrudes from the bottom of one end of the step cross arm with a thickness equal to the spacing between the two circular lugs of the moving block, A groove II is recessed at the end of the step vertical arm; a light hole II and a threaded blind hole II are opened on the upper and lower walls of the groove II to match the fastening screw II, and a mounting hole II is opened on the semicircular boss II to match the fixed shaft II with a slight clearance; the extension block II is symmetrical in structure with the extension block I, one end of which is higher and narrower than the other end, and the short end matches the groove II and is opened with a vertically through light hole and a threaded hole to match the fastening screw II; the inner side surface of the extension block II and the step vertical surface of the angle block II are in the same plane; the intersection line of the extended surface of the step vertical surface of the angle block II and the extended surface of the outer end surface of the horizontal arm of the moving block coincides with the central axis of the fixed shaft II; The vernier caliper includes a main scale mounted on a fixed block and a vernier scale mounted on a movable block; the zero scale end of the main scale is fixed in a main scale fixing hole by a main scale fixing shaft, and an extension line of the zero scale of the main scale coincides with the central axis of the fixed shaft I; the vernier scale is fixed in a vernier fixing hole by a vernier fixing shaft, and an extension line of the zero scale line of the vernier scale coincides with the central axis of the fixed shaft II 21.

[0005] During the test, the tested part is clamped by the clamping mechanism, the non-test arm is placed on the step of angle block I or on the steps of angle block I and angle block II, the test arm is against the outer end face of the cross arm of the fixed block, and the two ends of the test arm are respectively located on the central axis of fixed axis I and fixed axis II; at this time, the dimensions displayed on the main scale and the vernier scale are the lengths of the two ends of the test arm.

[0006] Further preferably, the clamping mechanism includes a support block, a T-bolt, a pressure plate, a washer and a nut; the support block is fixed to the upper end surface of the base plate; the two ends of the pressure plate are respectively crimped to the upper end surfaces of the support block and the tested part and the lower end is fixed to the T-bolt, washer and nut in the vertical T-groove of the base plate.

[0007] Further preferably, a threaded hole for an anti-dropping bolt is opened on the outer end surface of the horizontal T-shaped track, and the anti-dropping bolt is threadedly tightened on the outer end surface of the horizontal T-shaped track.

[0008] Compared with the prior art, the invention has the following beneficial effects: the invention has a simple structure, is easy to manufacture, and has a low cost; it is also simple to operate, has a fast measuring speed, and has low requirements on the professional level of the measuring personnel, and is more suitable for the detection and measurement of large quantities of arc-shaped transition angle parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a single-angle arc transition angle piece; Figure 2 It is a schematic diagram of a trapezoidal structure; Figure 3 It is a schematic diagram of a triangle structure; Figure 4 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the base plate in the present invention; Figure 6 It is a schematic diagram of the axial structure of the fixed block in one direction of the present invention; Figure 7 It is a schematic diagram of the axial structure of the fixing block in another direction of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the angle block I in the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the angle block II in the present invention; Fig.10 It is a schematic diagram of the axial structure of the moving block in one direction of the present invention; Fig.11 It is a schematic diagram of the axial structure of the moving block in another direction of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the extension block I in the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the extension block II in the present invention; Fig.14 It is a front view of the present invention when testing the distance between the intersection lines of the two arm end faces and the two outer end faces of the single-angle angular piece; Fig.15 It is a front view of the present invention when testing the distance between the intersection lines of the two arm end faces and the two outer end faces of the single-angle angular piece; Fig.16 It is a front view of the present invention when testing the distance between the two intersection lines of the outer end faces of the two sides of the isosceles trapezoid and the outer end face of the upper bottom face; Fig.17 It is a front view of the present invention when testing the distance between the two intersection lines of the inner end faces of the two waists of the isosceles trapezoid and the inner end face of the upper bottom face; Fig.18 This is a front view of the present invention when testing the distance between the two intersection lines of the outer end faces of the two sides of a non-isosceles trapezoid and the outer end face of the upper base. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0011] like Figures 4 to 18 As shown, this embodiment includes a base plate 16, a positioning mechanism, a clamping mechanism, a rotating mechanism and a vernier caliper. The upper end surface of one end of the base plate 16 is evenly and cross-embedded with penetrating transverse T-shaped grooves 161 and non-penetrating vertical T-shaped grooves 162. The upper end surface of the base plate 16 is also provided with a transverse T-shaped track 164 and a fixed light hole 163 with an interference fit with the fixed shaft I.

[0012] The positioning mechanism includes a fixed block 1, a fixed shaft Ⅰ2, an angle block Ⅰ5, an extension block Ⅰ3 and a fastening screw Ⅰ4. The main body of the fixed block 1 is L-shaped, and a circular boss 104 protrudes from the lower end of its corner. Another fixed light hole 105 with interference fit with the fixed shaft Ⅰ2 is opened in the center of the circular boss 104, and a guide angle 106 that does not interfere with the fixed light hole 105 is set at the outer end of its corner. A main scale fixing hole 102 is opened at the outer end of the vertical arm 101. The angle block Ⅰ5 is stepped, and a semicircular boss Ⅰ503 protrudes from the bottom of one end of the step horizontal arm 501, and a groove Ⅰ506 is recessed at the end of the step vertical arm 502. Light holes Ⅰ507 and threaded blind holes Ⅰ505 that match the fastening screw Ⅰ4 are opened on the upper and lower walls of the groove Ⅰ506, and a mounting hole Ⅰ504 that matches the fixed shaft Ⅰ2 with a slight clearance is opened on the semicircular boss Ⅰ503. One end 301 of the extension block Ⅰ3 is higher and narrower than the other end 302, and the short end 302 matches the groove Ⅰ506 and has a vertically through-hole and a threaded hole for matching with the fastening screw Ⅰ4. The circular boss 104 of the fixed block 1 overlaps the semicircular boss 503 of the angle block Ⅰ5 and is fixed to the base plate 16 by the fixed shaft Ⅰ2. The short end 302 of the extension block Ⅰ3 is inserted into the groove Ⅰ506 of the angle block Ⅰ5 and is fixed to the angle block Ⅰ5 by the fastening screw Ⅰ4. The inner side surface of the extension block Ⅰ3 and the vertical surface of the step of the angle block Ⅰ5 are in the same plane. The intersection line of the extended surface of the vertical surface of the step of the angle block Ⅰ5 and the extended surface of the outer end surface of the cross arm of the fixed block 1 coincides with the central axis of the fixed shaft Ⅰ2.

[0013] The rotating mechanism includes a moving block 18, an angle block II11, a fixed shaft II21, an extension block II13 and a fastening screw II12. The moving block 18 includes a horizontally placed U-shaped body 181, two circular lugs 183 and 184 integrally formed on the lower end wall of the U-shaped body 181, and the two circular lugs 183 and 184 are provided with interlocking fixing holes 186 that are interference-fitted with the fixed shaft II21, and the lower end surface of the U-shaped body 181 is provided with a T-shaped groove 185 used in conjunction with the horizontal T-shaped track 164 of the base plate 16, and the upper end surface is provided with a cursor fixing hole 182. The angle block II11 is stepped, and the upper end surface of the step cross arm 111 is flush with the upper end surface of the step cross arm 501 of the angle block I5. A semicircular boss II113 with a thickness equal to the distance between the two circular lugs 183 and 184 of the moving block 18 is protruded from the bottom of one end of the step cross arm 111, and a groove II116 is recessed at the end of the step vertical arm 112. The upper and lower walls of the groove II116 are provided with a light hole II117 and a threaded blind hole II115 for matching with the fastening screw II12, and the semicircular boss II113 is provided with a mounting hole II114 for matching with the fixed shaft II21 with a slight clearance. The extension block II13 is symmetrical in structure with the extension block I3, and one end 131 thereof is higher and narrower than the other end 132, and the short end 132 matches the groove II116 and is provided with a light hole and a threaded hole that pass through from top to bottom for matching with the fastening screw II12. The inner side surface of the extension block II13 and the step vertical surface of the angle block II11 are in the same plane. The intersection line of the extended surface of the step vertical surface of the angle block II11 and the extended surface of the outer end surface of the horizontal arm of the moving block 18 coincides with the central axis of the fixed shaft II21.

[0014] The vernier caliper includes a main scale 19 mounted on the fixed block 1 and a vernier scale 14 mounted on the moving block 18. The zero scale end of the main scale 19 is fixed in the main scale fixing hole 102 by the main scale fixing shaft 20, and the extension line of the zero scale of the main scale coincides with the central axis of the fixing shaft I2. The vernier scale 14 is fixed in the vernier fixing hole 182 by the vernier fixing shaft 17, and the extension line of the zero scale line of the vernier scale coincides with the central axis of the fixing shaft II21.

[0015] During the test, the tested part 22 is clamped by the clamping mechanism, the non-test arm is placed on the step of the angle block Ⅰ5 or on the steps of the angle block Ⅰ5 and the angle block Ⅱ11, the test arm is against the outer end face of the cross arm of the fixed block 1, and the two ends of the test arm are respectively located on the central axis of the fixed shaft Ⅰ2 and the fixed shaft Ⅱ21. At this time, the size displayed on the main scale and the vernier scale is the length of the two ends of the test arm.

[0016] Preferably, the clamping mechanism includes a support block 10, a T-bolt 9, a pressure plate 6, a washer 7 and a nut 8; the support block 10 is fixed to the upper end surface of the base plate 16; the two ends of the pressure plate 6 are respectively crimped to the upper end surfaces of the support block 10 and the tested part 22 and the lower end is fixed by the T-bolt 9, the washer 7 and the nut 8 in the vertical T-groove 162 of the base plate 16.

[0017] Preferably, a threaded hole for the anti-detachment bolt 15 is opened on the outer end surface of the horizontal T-shaped rail 164 , and the anti-detachment bolt 15 is threadedly tightened on the outer end surface of the horizontal T-shaped rail 164 .

[0018] like Fig.14 and Fig.15 As shown, during the test, since only the fixed block 1 is fixed in position, the angle block I5 and the angle block II11 can both rotate, and the angle block I5 can be rotated according to the angle of the tested part 22 to achieve that the outer end face or inner end face of the non-test arm is in close contact with the step of the angle block I5, the outer end face or inner end face of the test arm is against the outer end face of the cross arm of the fixed block 1, the pressure plate 6 is pressed against the upper end face of the tested part 22, and the moving block 18 is pushed, and the angle block II11 is rotated at the same time, so that the step of the angle block II11 is in close contact with the outer end face or inner end face of the test arm; at this time, the size displayed on the main scale and the vernier scale is the length of the two ends of the test arm.

[0019] like Fig.16 , Fig.17 and Fig.18 As shown, during the test, the angle block I5 can be rotated according to the angle of the tested part 22 so that the outer end face or inner end face of one non-test arm is in close contact with the step of the angle block I5, the outer end face or inner end face of the test arm is against the outer end face of the cross arm of the fixed block 1, the pressure plate 6 is pressed against the upper end face of the tested part 22, the moving block 18 is pushed, and the angle block II11 is rotated at the same time, so that the step of the angle block II11 is in close contact with the outer end face or inner end face of the other non-test arm; at this time, the size displayed on the main scale and the vernier scale is the length of the two ends of the test arm to be tested.

[0020] The method for measuring the distance L5 between the two intersection lines of the outer end faces of the two sides of the triangle and the outer end faces of the bottom face is the same as the method for measuring the distance L2 between the two arm end faces and the intersection lines of the two outer end faces of the angle piece.

[0021] Of course, the present invention has many other embodiments. Without violating the spirit and essence of the present invention, technicians familiar with the field can make corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should be regarded as improvements of equivalent technologies and belong to the protection scope of the claims of the present invention.

Claims

1. A length measuring device for an arc-shaped transition angle piece, characterized in that: It includes a base plate, a positioning mechanism, a clamping mechanism, a rotating mechanism and a vernier caliper; The upper end surface of one end of the base plate is uniformly and cross-embedded with penetrating transverse T-shaped grooves and non-penetrating vertical T-shaped grooves, and the upper end surface of the base plate is also provided with a transverse T-shaped track and a fixed light hole with an interference fit with the fixed shaft I; The positioning mechanism includes a fixed block, a fixed shaft I, an angle block I, an extension block I and a fastening screw I; the main body of the fixed block is L-shaped, a circular boss protrudes from the lower end of its corner, another fixed light hole with interference fit with the fixed shaft I is opened in the center of the circular boss, a guide angle that does not interfere with the fixed light hole is set at the outer end of the corner, and a main scale fixing hole is opened at the outer end of the vertical arm; the angle block I is stepped, a semicircular boss I protrudes from the bottom of one end of the step horizontal arm, and a groove I is recessed at the end of the step vertical arm; a light hole I and a threaded blind hole I that match the fastening screw I are opened on the upper and lower walls of the groove I, and a micro gap with the fixed shaft I is opened on the semicircular boss I The extension block I has one end higher and narrower than the other end, and the short end matches the groove I and is provided with a vertically through-hole and a threaded hole for matching with the fastening screw I; the circular boss of the fixing block overlaps the semicircular boss of the angle block I and is fixed to the base plate by the fixing shaft I, and the short end of the extension block I is inserted into the groove I of the angle block I and is fixed to the angle block I by the fastening screw I; the inner side surface of the extension block I and the step vertical surface of the angle block I are in the same plane; the intersection line of the extended surface of the step vertical surface of the angle block I and the extended surface of the outer end surface of the cross arm of the fixing block coincides with the central axis of the fixing shaft I; The rotating mechanism includes a moving block, an angle block II, a fixed shaft II, an extension block II and a fastening screw II; the moving block includes a horizontally placed U-shaped body, two circular lugs integrally formed on the lower end wall of the U-shaped body, the two circular lugs are provided with interlocking fixing holes that are interference fit with the fixed shaft II, the lower end surface of the U-shaped body is provided with a T-shaped groove used in conjunction with the horizontal T-shaped track of the base plate, and the upper end surface is provided with a vernier fixing hole; the angle block II is stepped, the upper end surface of its step cross arm is flush with the upper end surface of the step cross arm of the angle block I, and a semicircular boss II protrudes from the bottom of one end of the step cross arm with a thickness equal to the spacing between the two circular lugs of the moving block, A groove II is recessed at the end of the step vertical arm; a light hole II and a threaded blind hole II are opened on the upper and lower walls of the groove II to match the fastening screw II, and a mounting hole II is opened on the semicircular boss II to match the fixed shaft II with a slight clearance; the extension block II is symmetrical in structure with the extension block I, one end of which is higher and narrower than the other end, and the short end matches the groove II and is opened with a vertically through light hole and a threaded hole to match the fastening screw II; the inner side surface of the extension block II and the step vertical surface of the angle block II are in the same plane; the intersection line of the extended surface of the step vertical surface of the angle block II and the extended surface of the outer end surface of the horizontal arm of the moving block coincides with the central axis of the fixed shaft II; The vernier caliper includes a main scale mounted on a fixed block and a vernier scale mounted on a movable block; the zero scale end of the main scale is fixed in a main scale fixing hole by a main scale fixing shaft, and an extension line of the zero scale of the main scale coincides with the central axis of the fixed shaft I; the vernier scale is fixed in a vernier fixing hole by a vernier fixing shaft, and an extension line of the zero scale line of the vernier scale coincides with the central axis of the fixed shaft II 21.

2. The vernier caliper comprises a main scale and a vernier scale mounted on the main scale; the zero scale end of the main scale is fixed in the main scale fixing hole by the main scale fixing shaft, and the extension line of the zero scale of the main scale is aligned with the central axis of the fixing shaft I; the vernier scale is fixed in the vernier fixing hole by the vernier fixing shaft; During the test, the tested part is clamped by the clamping mechanism, the non-test arm is placed on the step of angle block I or on the steps of angle block I and angle block II, the test arm is against the outer end face of the cross arm of the fixed block, and the two ends of the test arm are respectively located on the central axis of fixed axis I and fixed axis II; at this time, the dimensions displayed on the main scale and the vernier scale are the lengths of the two ends of the test arm.

3. The length measuring device of the arc-shaped transition angle piece according to claim 1, characterized in that: The clamping mechanism includes a support block, a T-bolt, a pressure plate, a washer and a nut; the support block is fixed on the upper end surface of the base plate; the two ends of the pressure plate are respectively crimped on the upper end surfaces of the support block and the tested part and the lower end is fixed by the T-bolt, washer and nut in the vertical T-groove of the base plate.

4. The length measuring device of the arc-shaped transition angle piece according to claim 1 or 2, characterized in that: The elastic pressing block is a rubber block. A threaded hole for an anti-dropping bolt is provided on the outer end surface of the horizontal T-shaped track, and the anti-dropping bolt is threadedly tightened on the outer end surface of the horizontal T-shaped track.

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