CN111750760B - Device and method for measuring arc size - Google Patents
Device and method for measuring arc size Download PDFInfo
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- CN111750760B CN111750760B CN202010523161.4A CN202010523161A CN111750760B CN 111750760 B CN111750760 B CN 111750760B CN 202010523161 A CN202010523161 A CN 202010523161A CN 111750760 B CN111750760 B CN 111750760B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/213—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures for measuring radius of curvature
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention belongs to the field of product tool design, and relates to a device and a method for measuring the size of an arc; the device comprises a base (1), a part rotating device (2), a dial indicator rotating device (3), a dial indicator (4), a dial indicator base moving device (5), an angular positioning device (6) and a dial indicator piece (7); the invention utilizes two rotating seats, one of which is provided with a self-centering positioning and clamping device, the positioning size is adjustable, the device is used for installing a part to be measured, and the center of a measured circular arc R1 is ensured to coincide with the rotating center of the rotating seat during clamping; the other dial indicator is installed to be horizontally placed and can be adjusted up and down, and the rotating center of the rotating seat is projected on the axis of the dial indicator. Two roating seats all are equipped with angular locking device to install on same base, the distance accessible of centre removes the amesdial mount pad and adjusts and lock. A device and a method for measuring the size of the radius of a circular arc of which the outline is less than one half of a circle are provided.
Description
Technical Field
The invention belongs to the field of product tool design, and relates to a device and a method for measuring the size of an arc, which can improve the inspection efficiency without the help of three coordinates.
Background
The shell is an important part in the aircraft engine and is used for mounting various functional parts and ensuring that the parts have accurate positions and relative motion relations. Influenced by factors such as the whole space and weight reduction of the aircraft engine, the shell has a complex appearance, and most of the shells have circular arcs smaller than a half circle, which is shown in figure 1. In the process of machining the shell, the arc cannot be measured by a universal gauge (such as a caliper, a micrometer and the like), the actual value cannot be measured by using an R gauge for comparison measurement, three-coordinate measurement is usually used under the condition, the tolerance of the arc is mostly not noted, the precision is low, and the measurement resource is wasted by using three coordinates.
Disclosure of Invention
The technical problem solved by the invention is as follows: the invention designs a device and a method for measuring the radius sizes of a shell arc smaller than a half of a circular arc and an adjacent tangent arc, which can quickly, accurately and efficiently measure the actual size of the radius of the circular arc and release the measuring capability of three coordinates.
The technical scheme of the invention is as follows:
a device for measuring the size of an arc comprises a base 1, a part rotating device 2, a dial indicator rotating device 3, a dial indicator 4, a dial indicator seat moving device 5, an angular positioning device 6 and an indicator piece 7; be equipped with roating seat locating hole and moving slide rail on base 1, moving slide rail cross sectional shape is T type flute profile, the center of roating seat locating hole is on moving slide rail's central line, and amesdial seat mobile device 5's lead screw is parallel with moving slide rail, installs in the moving slide rail lower part, and amesdial rotary device 3 adorns on base 1's moving slide rail, can follow moving slide rail and slide, installs amesdial 4 on amesdial rotary device 3's the gauge stand, and angular positioning device 6 installs on base 1's moving slide rail to be in amesdial rotary device 3's right side.
The part rotating device 2 comprises a rotating seat a, a self-centering positioning and clamping device 22 and a rotating self-locking device a 23; the rotary seat a is a T-shaped columnar structure, the lower end a25 of the rotary seat a is installed in a rotary seat positioning hole of the base 1, the upper end a24 of the rotary seat a can rotate around the center of the rotary seat positioning hole, the self-centering positioning and clamping device 22 is installed on the upper end face of the rotary seat a, the center of the self-centering positioning and clamping device coincides with the center of the rotary seat positioning hole, and the rotary self-locking device a23 is installed at the upper end of the rotary seat a.
The dial indicator rotating device 3 comprises a rotating seat b, a gauge stand 32 and a gauge stand lifting device 33; the meter frame lifting device 33 is arranged on the rotating seat b, and the meter frame 32 is arranged on the meter frame lifting device 33; the rotating seat b is in clearance-free fit with the movable sliding rail of the base 1.
The rotating seat b is in a T-shaped columnar structure and comprises a lower end b35 of the rotating seat and an upper end b34 of the rotating seat; be equipped with the screw hole on roating seat lower extreme b35, with the lead screw cooperation of amesdial seat mobile device 5, the lead screw rotation drives amesdial rotary device 3 and removes, and table frame elevating gear 33 can be on roating seat upper end b34 free rotation, and the centre of rotation is on roating seat b central line.
And a positioning surface is arranged on the right side of the upper end of the rotating seat b and is vertical to the axis of the dial indicator 4.
The precision of the micrometer 4 is less than one fifth of the tolerance of the measured dimension, and the measuring range is more than 1.3 times of the tolerance of the measured dimension.
The dial gauge seat moving device 5 comprises a lead screw 51, a displacement measuring device 52 and a self-locking device b 53; the screw rod 51 is arranged at the bottom of the movable sliding rail of the base 1 and penetrates through a threaded hole at the lower end of a rotating seat b of the dial indicator rotating device 3, and the screw rod 51 rotates to drive the dial indicator rotating device 3 to move; the position measuring device 52 is installed at the right end of the screw 51, the self-locking device b53 is installed on the base 1, and the position of the dial indicator rotating device 3 is locked by locking the rotation of the screw 51.
The angular positioning device 6 comprises a positioning block 61 and a self-locking screw 62; the lower part of the positioning block 61 is of an inverted T-shaped columnar structure and is in clearance-free fit with a movable sliding rail of the base 1 and can slide along the movable sliding rail, a through hole is formed in the middle of the positioning block, a screw rod in the dial gauge seat moving device 5 penetrates through the through hole, the left end of the upper part of the dial gauge seat moving device is provided with a positioning surface which is perpendicular to the movable sliding rail of the base 1, the positioning surface is tightly attached to the positioning surface of the dial gauge rotating device 3 in working and is fastened by a self-locking screw 62, the angular direction of the dial gauge rotating device 3 is locked, the dial gauge 4 points to the center of the part rotating device 2, the self-locking screw 62 is loosened in non-working, and the angular positioning device 6 is pushed to the right end of the movable sliding rail of the base 1.
A non-tangent arc measuring step of a device for measuring the size of an arc comprises the following steps: designing a gauge part 7 according to the size and height of a measured part R1, installing the gauge part 7 on a part rotating device 2, installing a dial indicator 4 on a dial indicator rotating device 3, and adjusting a gauge stand lifting device to enable the dial indicator 4 and the gauge part 7 to be at the same height with respect to the excircle part; adjusting the angular positioning device 6 to enable the dial indicator 4 to point to the rotation center of the part rotating device 2; adjusting the dial gauge seat moving device 5 to press the gauge head of the dial gauge 4 on the outer circle of the gauge alignment piece 7, adjusting the gauge needle to point to the zero point position, and locking; disassembling the watch piece 7 and measuring the mounting parts; when the part is measured, the numerical value (divided into positive and negative) of the dial indicator 4 is added with the actual size of the pair of the gauge outer circle radius d/2 of the gauge part 7, namely the radius size of the measured part circular arc R1, and the part rotating device 2 is rotated to measure the size of all circular arc sections.
The meter aligning piece 7 consists of a positioning excircle and a meter aligning excircle, the coaxiality is within 0.005mm, the positioning excircle coincides with the rotation center of the part rotating device, the diameter of the meter aligning excircle is determined according to the nominal size of a measured circular arc R1, and the height of the meter aligning piece is required to be consistent with the position of the measured circular arc R1; has sufficient hardness.
The invention has the beneficial effects that:
1. the problem of measuring the radius sizes of the arc of the shell, the arc of which the shape is smaller than one half of the circle, and the adjacent tangent arc is solved;
2. the design idea of a novel arc measuring device is provided, and the measurement of the radius sizes of an arc smaller than one half of a circle and an adjacent tangent arc is realized by means of a dial indicator;
3. the base has enough strength and precision and is provided with a positioning hole and a guide groove, so that the rotation precision and the position precision of the part rotating device and the dial indicator rotating device are ensured;
4. the part rotating device is provided with a self-centering positioning and clamping device, so that the positioning and clamping of the part are realized, a positioning tool can be designed if necessary, and the measurement range is expanded;
5. the dial indicator rotating device is provided with a liftable indicator frame, and the height of the dial indicator is adjusted to adapt to different parts;
6. the dial gauge seat moving device has enough adjusting precision, the center distance a between the part rotating device and the dial gauge rotating device can be accurately determined, and the precision reaches more than 0.01 mm;
7. the angular positioning device is provided with a positioning block so as to ensure that the dial indicator points to the center of the part rotating device during locking and the dial indicator rotating device freely rotates during loosening;
8. the application range is wide. The arc R1 of the part to be measured can be arranged on the rotation center of the part rotating device and can be measured by pressing a meter.
Drawings
FIG. 1 is a circular arc illustration of the exterior shape of a model aircraft engine casing;
FIG. 2 is a front view of the measuring device of the present invention;
FIG. 3 is a top view of the measuring device of the present invention;
FIG. 4 is a cross-sectional view taken along line W-W of FIG. 2 in accordance with the present invention;
FIG. 5 is a cross-sectional view taken along line X-X of FIG. 2 in accordance with the present invention;
FIG. 6 is a schematic view of the dial gauge stand moving device 5 of the present invention;
FIG. 7 is a cross-sectional view taken along line Z-Z of FIG. 2 in accordance with the present invention;
FIG. 8 is a schematic representation of a pair of parts of the measuring device of the present invention;
FIG. 9 is a schematic view of the measured arc R1 of the present invention;
FIG. 10 is a schematic view of the measuring tangent arc R2 of the present invention;
fig. 11 is a front sectional view of the base 1.
Detailed Description
The present invention is described in further detail below.
A device for measuring the arc dimension comprises a base 1, a part rotating device 2, a dial indicator rotating device 3, a dial indicator 4, a dial indicator base moving device 5, an angular positioning device 6 and a gauge aligning piece 7; be equipped with roating seat locating hole and moving slide rail on base 1, moving slide rail cross sectional shape is T type flute profile, the center of roating seat locating hole is on moving slide rail's central line, and amesdial seat mobile device 5's lead screw is parallel with moving slide rail, installs in the moving slide rail lower part, and amesdial rotary device 3 adorns on base 1's moving slide rail, can follow moving slide rail and slide, installs amesdial 4 on amesdial rotary device 3's the gauge stand, and angular positioning device 6 installs on base 1's moving slide rail to be in amesdial rotary device 3's right side.
The part rotating device 2 comprises a rotating seat a, a self-centering positioning and clamping device 22 and a rotating self-locking device a 23; the rotary seat a is a T-shaped columnar structure, the lower end a25 of the rotary seat a is installed in a rotary seat positioning hole of the base 1, the upper end a24 of the rotary seat a can rotate around the center of the rotary seat positioning hole, the self-centering positioning and clamping device 22 is installed on the upper end face of the rotary seat a, the center of the self-centering positioning and clamping device coincides with the center of the rotary seat positioning hole, and the rotary self-locking device a23 is installed at the upper end of the rotary seat a.
The dial indicator rotating device 3 comprises a rotating seat b, a gauge stand 32 and a gauge stand lifting device 33; the meter frame lifting device 33 is arranged on the rotating seat b, and the meter frame 32 is arranged on the meter frame lifting device 33; the rotating seat b is in clearance-free fit with the movable sliding rail of the base 1, is of a T-shaped columnar structure and comprises a lower end b35 of the rotating seat and an upper end b34 of the rotating seat; a threaded hole is formed in the lower end b35 of the rotating base and is matched with a lead screw of the dial gauge base moving device 5, the lead screw rotates to drive the dial gauge rotating device 3 to move, the gauge stand lifting device 33 can freely rotate on the upper end b34 of the rotating base, and the rotating center is on the central line of the rotating base b; and a positioning surface is arranged on the right side of the upper end of the rotating seat b and is vertical to the axis of the dial indicator 4. The rotating center of the rotating seat b of the dial indicator rotating device 3 is projected on the axis of the dial indicator 4.
The dial gauge seat moving device 5 comprises a lead screw 51, a displacement measuring device 52 and a self-locking device b 53; the screw rod 51 is arranged at the bottom of the movable sliding rail of the base 1 and penetrates through a threaded hole at the lower end of a rotating seat b of the dial indicator rotating device 3, and the screw rod 51 rotates to drive the dial indicator rotating device 3 to move; the position measuring device 52 is arranged at the right end of the screw rod 51, the self-locking device b53 is arranged on the base 1, and the position of the dial indicator rotating device 3 is locked by locking the rotation of the screw rod 51; the position measuring device 52 calculates and displays the distance from the dial indicator rotating device 3 to the rotating seat positioning hole of the base 1 by measuring the number of rotating circles of the lead screw 51, and the precision reaches 0.01 mm.
The angular positioning device 6 comprises a positioning block 61 and a self-locking screw 62; the lower part of the positioning block 61 is of an inverted T-shaped columnar structure, is in clearance-free fit with a movable sliding rail of the base 1 and can slide along the movable sliding rail, and a through hole is formed in the middle and larger than the diameter of a screw rod in the dial gauge seat moving device 5, so that the purpose of avoiding is achieved; the left end on upper portion is equipped with the locating surface, and the locating surface is perpendicular with the mobile slide rail of base 1, and the during operation makes the locating surface paste tightly on the locating surface of amesdial rotary device 3 to fasten with self-locking screw 62, realize locking amesdial rotary device 3 angular, make the directional part rotary device 2 center of amesdial 4, during the inoperative time loosen self-locking screw 62, and with angular positioning device 6 push to the mobile slide rail right side end of base 1 can.
The base 1 is provided with a part rotating device 2, a dial indicator rotating device 3, a dial indicator seat moving device 5 and an angular positioning device 6, and is provided with a rotating seat positioning hole and a moving slide rail, so that correct position relation and motion relation among the devices are ensured; the part rotating device 2 is provided with a rotating seat, a self-centering positioning clamping device, a rotating self-locking device and the like, and realizes the functions of overlapping the center of a measured circular arc R1 with the rotating center of the rotating seat during clamping and arbitrary angular locking during rotation; the dial indicator rotating device 3 is provided with a rotating base, a dial indicator frame lifting device and the like, so that the dial indicator can be horizontally placed, the height position can be adjusted, and the rotating center of the rotating base is projected on the axis of the dial indicator; the dial indicator 4 is arranged on the indicator frame of the dial indicator rotating device 3, and can automatically select a dial indicator or a dial indicator suitable for the precision and the measuring range according to the measurement precision and the tolerance requirement; the dial gauge seat moving device 5 is provided with a lead screw, a displacement measuring device, a self-locking device and the like, and realizes the adjustment of the center distance between the part rotating device 2 and the dial gauge rotating device 3; the angular positioning device 6 is provided with a positioning block, a track, a self-locking device and the like, and has two states, namely locking the dial indicator rotating device 3 to ensure that the axis projection of the dial indicator coincides with the central connecting line of the two rotating seats, and loosening the dial indicator rotating device 3 to drive the dial indicator 4 to rotate freely; the gauge part 7 is used for zero setting of the dial gauge 4 and comprises a positioning excircle and a gauge excircle, the coaxiality is within 0.005mm, the positioning excircle is matched with the positioning part of the part rotating device 2, the center of the mounted gauge part 7 is ensured to be coincided with the rotating center of the part rotating device 2, the diameter of the gauge excircle is determined according to the nominal size of a measured circular arc R1 and is generally equal to the nominal size of the measured circular arc R1, the tolerance is generally +/-0.001 mm, and the height of the gauge excircle is required to be consistent with the position of the measured circular arc R1. The meter aligning piece 7 consists of a positioning excircle and a meter aligning excircle, the coaxiality is within 0.005mm, the positioning excircle coincides with the rotation center of the part rotating device, the diameter of the meter aligning excircle is determined according to the nominal size of a measured circular arc R1 and is generally equal to the nominal size, the tolerance is generally +/-0.001 mm, and the height of the meter aligning piece is required to be consistent with the position of the measured circular arc R1; has enough hardness, increases stability and wear resistance; when in actual use, the arc-shaped steel plate can be designed in groups according to the size of a common arc; the measured part is arranged on the part rotating device 2, the circle center of the measured circular arc R1 coincides with the rotating center of the part rotating device 2, the distance between the surface of the circular arc R1 and the rotating center is the radius, and the variation is measured by the dial indicator 4. The dial gauge 4 can be accurately zeroed for the gauge part 7, and the actual size can be obtained by adding the gauge part 7 to the gauge outer circle radius and the pointer variation of the dial gauge 4. The positions of the part rotating device 2 and the dial indicator rotating device 3 are adjusted to be consistent with the center distance a between the measured part circular arc R1 and the tangent circular arc R2, and the radius size of the tangent circular arc R2 can be measured. When the radius of the measured circular arc R1 is measured, the angular positioning device 6 needs to be locked, so that the head of the dial indicator 4 points to the part rotating device 2. When the radius of the tangent arc R2 is measured, the locking angular positioning device 6 needs to be loosened, so that the rotating dial indicator rotating device 3 can rotate freely. When the radius of the tangent arc R2 is measured, the part rotating device 2 needs to be locked, and the tangent point is ensured to be on the line of the center distance a. The dial gauge seat moving device 5 can accurately adjust the distance between the part rotating device 2 and the dial gauge rotating device 3 to be accurate to 0.01mm, and an actual numerical value is displayed. The dial indicator frame of the dial indicator rotating device 3 can be lifted to adjust the height of the dial indicator 4 so as to adapt to different part requirements. When the micrometer 4 is selected, the precision is less than one fifth of the tolerance of the measured dimension, and the measuring range is more than 1.3 times of the tolerance of the measured dimension. The nominal size is generally adopted when the surface and the outer circle of the gauge piece 7 are designed, and if the measuring range of the dial gauge 4 is close to the tolerance of the measured size, the design can be carried out according to the median error, and the adjustment can be flexible.
The measuring method comprises the following steps:
measuring a non-tangent arc: designing a gauge part 7 according to the size and height of a measured part R1, installing the gauge part 7 on a part rotating device 2, selecting a proper dial indicator 4 to be installed on a dial indicator rotating device 3, and adjusting a gauge stand lifting device to enable the dial indicator 4 and the gauge outer circle part of the gauge part 7 to be at the same height; adjusting the angular positioning device 6 to enable the dial indicator 4 to point to the rotation center of the part rotating device 2; adjusting the dial gauge seat moving device 5 to press the gauge head of the dial gauge 4 on the gauge outer circle of the gauge piece 7, and adjusting the gauge needle to point to the zero point position and locking; disassembling the watch piece 7, completing the preparation work, and installing parts for measurement; when the part is measured, the numerical value (divided into positive and negative) of the dial indicator 4 is added with the actual size of the surface and outer circle radius d/2 of the gauge part 7, namely the radius size of the circular arc R1 of the part to be measured, and the part rotating device 2 is rotated to measure the sizes of all circular arc sections.
Measuring a tangent arc: designing a pair of gauge pieces 7 according to the size and height of a measured part circular arc R1, mounting the pair of gauge pieces 7 on a part rotating device 2, selecting a proper dial gauge 4 to be mounted on a dial gauge rotating device 3, and adjusting a gauge stand lifting device to enable the dial gauge 4 and the gauge part 7 to be at the same height; adjusting the angular positioning device 6 to enable the dial indicator 4 to point to the rotation center of the part rotating device 2; adjusting the dial indicator seat moving device 5 to ensure that the distance between the rotating centers of the part rotating device 2 and the dial indicator rotating device 3 is equal to the central distance a between the measured circular arc R1 and the tangent circular arc R2 of the part, and locking; adjusting a gauge stand on the dial gauge rotating device 3 to enable a gauge head of the dial gauge 4 to be pressed on the gauge outer circle of the gauge piece 7, and adjusting a gauge needle to point to a zero point position and locking; disassembling the watch piece 7, completing the preparation work, and installing parts for measurement; when the size of the part arc R1 is measured, the part rotating device 2 is rotated, the numerical value (divided into positive and negative) of the dial indicator 4 is added with the actual size of the surface and outer circle radius d/2 of the surface indicator 7, and the actual size is the radius size of the measured part arc R1; when measuring tangent circular arc R2, need rotating element rotary device 2 to make 4 gauge outfits of amesdial press on the tangential point, the rotating element rotary device 2 of locking is died, avoids the part to rotate, loosens angular positioner 6, and rotatory amesdial rotary device 3 makes 4 gauge outfits of amesdial slide at tangent circular arc R2 surface, and tangent circular arc radius R2 equals: the central distance a minus the value (plus or minus) of the comparison external circle radius d/2 of the gauge 7 plus the dial indicator 4.
The principle of the invention is as follows: two rotating seats are utilized, one of the two rotating seats is provided with a self-centering positioning clamping device, the positioning size is adjustable, the self-centering positioning clamping device is used for installing a part to be measured, and the center of a measured circular arc R1 is ensured to coincide with the rotating center of the rotating seat during clamping; the other dial indicator is installed to be horizontally placed and can be adjusted up and down, and the rotating center of the rotating seat is projected on the axis of the dial indicator. Two roating seats all are equipped with angular locking device to install on same base, the distance accessible of centre removes the amesdial mount pad and adjusts and lock.
Claims (9)
1. A device for measuring the size of an arc is characterized by comprising a base (1), a part rotating device (2), a dial indicator rotating device (3), a dial indicator (4), a dial indicator base moving device (5), an angular positioning device (6) and a gauge part (7); the base (1) is provided with a rotating seat positioning hole and a movable sliding rail, the section of the movable sliding rail is in a T-shaped groove shape, the center of the rotating seat positioning hole is located on the central line of the movable sliding rail, a lead screw of a dial indicator seat moving device (5) is parallel to the movable sliding rail and is installed at the lower part of the movable sliding rail, a dial indicator rotating device (3) is installed on the movable sliding rail of the base (1) and can slide along the movable sliding rail, a dial indicator (4) is installed on an indicator frame of the dial indicator rotating device (3), and an angular positioning device (6) is installed on the movable sliding rail of the base (1) and is located on the right side of the dial indicator rotating device (3);
the part rotating device (2) comprises a rotating seat a, a self-centering positioning clamping device (22) and a rotating self-locking device a (23); the rotary seat a is of a T-shaped columnar structure, the lower end a (25) of the rotary seat is installed in a rotary seat positioning hole of the base (1), the upper end a (24) of the rotary seat can rotate around the center of the rotary seat positioning hole, the self-centering positioning and clamping device (22) is installed on the upper end face of the rotary seat a, the center of the self-centering positioning and clamping device coincides with the center of the rotary seat positioning hole, and the rotary self-locking device a (23) is installed at the upper end of the rotary seat a.
2. The device for measuring the circular arc dimension as claimed in claim 1, wherein the dial indicator rotating device (3) comprises a rotating base b, a gauge stand (32) and a gauge stand lifting device (33); the meter frame lifting device (33) is arranged on the rotating seat b, and the meter frame (32) is arranged on the meter frame lifting device (33); the rotating seat b is in clearance-free fit with the movable sliding rail of the base (1).
3. The device for measuring the size of the circular arc according to claim 2, wherein the rotating base b is in a T-shaped cylindrical structure and comprises a lower end b (35) of the rotating base and an upper end b (34) of the rotating base; be equipped with the screw hole on roating seat lower extreme b (35), with the lead screw cooperation of amesdial seat mobile device (5), lead screw rotation drive amesdial rotary device (3) remove, table frame elevating gear (33) can be on roating seat upper end b (34) free rotation, and the rotation center is on roating seat b central line.
4. The device for measuring the size of the circular arc according to claim 2, wherein the right side of the upper end of the rotating seat b is provided with a positioning surface which is vertical to the axis of the dial indicator (4).
5. The device for measuring dimensions of circular arcs according to claim 1, characterized in that said dial gauge (4) has an accuracy of less than one fifth of the measured dimensional tolerance and a measuring range of more than 1.3 times the measured dimensional tolerance.
6. The device for measuring the circular arc dimension as claimed in claim 1, wherein the dial gauge stand moving device (5) comprises a lead screw (51), a displacement measuring device (52) and a self-locking device b (53); the screw rod (51) is arranged at the bottom of the movable sliding rail of the base (1) and penetrates through a threaded hole at the lower end of a rotating seat b of the dial indicator rotating device (3), and the screw rod (51) rotates to drive the dial indicator rotating device (3) to move; the position measuring device (52) is installed at the right end of the lead screw (51), the self-locking device b (53) is installed on the base 1, and the position of the dial indicator rotating device (3) is locked by locking the rotation of the lead screw (51).
7. Device for measuring dimensions of arcs of circles as per claim 1, characterised by the fact that said angular positioning means (6) comprise a positioning block (61) and a self-locking screw (62); the lower part of the positioning block (61) is of an inverted T-shaped columnar structure, the positioning block is in clearance-free fit with a movable sliding rail of the base (1), the positioning block can slide along the movable sliding rail, a through hole is formed in the middle of the positioning block, a screw rod in the dial gauge seat moving device (5) penetrates through the through hole, the left end of the upper part is provided with a positioning surface, the positioning surface is perpendicular to the movable sliding rail of the base (1), the positioning surface is tightly attached to the positioning surface of the dial gauge rotating device (3) in work and is fastened by the self-locking screw (62), the dial gauge rotating device (3) is locked angularly, the dial gauge (4) points to the center of the part rotating device (2), the self-locking screw (62) is loosened in non-work, and the angular positioning device (6) is pushed to the end of the right side of the movable sliding rail of the base (1).
8. The measuring method of the device for measuring the size of the circular arc according to any one of claims 1 to 7, characterized in that a pair of gauge pieces (7) is designed according to the size and the height of a part to be measured R1, the pair of gauge pieces (7) is installed on the part rotating device (2), a dial indicator (4) is installed on the dial indicator rotating device (3), and a gauge stand lifting device is adjusted to enable the dial indicator (4) and the pair of gauge pieces (7) to be at the same height of the gauge outer circle part; adjusting the angular positioning device (6) to enable the dial indicator (4) to point to the rotating center of the part rotating device (2); adjusting the dial gauge seat moving device (5) to press the gauge head of the dial gauge (4) on the gauge-aligning outer circle of the gauge-aligning piece (7), and adjusting the gauge needle to point to the zero point position and locking; disassembling the watch piece (7) and measuring the mounting parts; when the part is measured, the numerical value of the dial indicator (4) is added with the actual size of the surface and outer circle radius d/2 of the surface and outer circle of the surface and meter piece (7), namely the radius size of the circular arc R1 of the part to be measured, and the part rotating device (2) is rotated to measure the sizes of all circular arc sections.
9. The method for measuring the arc size of the device according to claim 8, wherein the pair of the surface parts (7) is composed of a positioning outer circle and a pair of surface outer circles, the coaxiality is within 0.005mm, the positioning outer circle is coincident with the rotation center of the part rotating device, the diameter of the pair of the surface outer circles is determined according to the nominal size of the measured arc R1, and the height is required to be consistent with the position of the measured arc R1; has sufficient hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523161.4A CN111750760B (en) | 2020-06-10 | 2020-06-10 | Device and method for measuring arc size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010523161.4A CN111750760B (en) | 2020-06-10 | 2020-06-10 | Device and method for measuring arc size |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111750760A CN111750760A (en) | 2020-10-09 |
| CN111750760B true CN111750760B (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010523161.4A Active CN111750760B (en) | 2020-06-10 | 2020-06-10 | Device and method for measuring arc size |
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Effective date of registration: 20230605 Address after: 102200 No.3, No.1, No.2, Huoju street, Changping Town, Changping District, Beijing Patentee after: BEIJING AERO LEVER PRECISION LTD. Address before: 102200 No.1, Lixiang Road, science and Technology Park, Changping District, Beijing Patentee before: CHINA AEROSPACE BEIJING HANGKE ENGINE CONTROL SYSTEM TECHNOLOGY Co.,Ltd. |