CN116067253A - Form and position tolerance gauge - Google Patents
Form and position tolerance gauge Download PDFInfo
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- CN116067253A CN116067253A CN202310169034.2A CN202310169034A CN116067253A CN 116067253 A CN116067253 A CN 116067253A CN 202310169034 A CN202310169034 A CN 202310169034A CN 116067253 A CN116067253 A CN 116067253A
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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
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/25—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B5/252—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes for measuring eccentricity, i.e. lateral shift between two parallel axes
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Abstract
The invention discloses a form and position tolerance gauge, which comprises a first gauge, a second gauge and a third gauge; the first gauge is a bearing hole coaxiality gauge; the second gauge is a gauge for detecting the perpendicularity and parallelism of the end face of the workpiece slideway and the axial lead of the bearing hole; the third gauge is a coaxiality gauge of two semicircle sizes of the workpiece slide rail and the positioning size of the reference end surface of the workpiece, and a perpendicularity gauge of the workpiece slide rail and the reference surface of the workpiece; the form and position tolerance checking fixture can complete the checking of the whole form and position tolerance by precisely processing the standard cushion block, the auxiliary flat iron and the reference auxiliary positioning block and matching with the prior dial indicator (dial indicator), has simple structure and low manufacturing cost, and can ensure the detection effect of the checking fixture.
Description
Technical Field
The invention particularly relates to a form and position tolerance gauge, and belongs to the technical field of compressor body form and position tolerance measuring tools.
Background
The compressor body (crank case) is a basic part of the whole compressor, the used accessories are assembled on the workpiece, so that the size precision and coaxiality of the axle hole of the accessory are the most important technical parameters of the workpiece, the qualification can be judged only if the size is required to completely meet the drawing requirements, the size tolerance can be measured by using a common internal diameter gauge and the like, but the measurement of the form tolerance such as coaxiality cannot be performed, in the prior art, the form tolerance of the compressor body can be measured by using a three-coordinate measuring instrument, but the manufacturing cost is too high, particularly the geometric size of the workpiece is larger, the small three-coordinate measuring instrument has no measure at all, and the three-coordinate measuring instrument with larger specification can meet the measurement requirement.
Disclosure of Invention
In order to solve the problems, the invention provides a form and position tolerance checking fixture, which can complete the checking of the whole form and position tolerance by precisely processing a standard cushion block, an auxiliary flat iron and a reference auxiliary positioning block and matching with the conventional dial indicator (dial indicator), has simple structure and low manufacturing cost, and can ensure the detection effect of the checking fixture.
The form and position tolerance gauge comprises a first gauge, a second gauge and a third gauge;
the first gauge is a bearing hole coaxiality gauge; the first gauge comprises a dial indicator, a checking platform for placing a workpiece and a standard cushion block arranged on the checking platform; the axes of the large bearing hole and the small bearing hole of the workpiece are parallel to the inspection platform, and the top surface of the standard cushion block and the other side of the inspection platform are provided with a magnetometer seat; the dial indicators are movably arranged on the two magnetic meter seats; the actual measurement size of the large bearing hole measured by the dial indicator is a, the actual measurement size of the small bearing hole measured by the dial indicator is b, and the height size of the standard cushion block is a/2-b/2;
when the first gauge detects, a measured workpiece is placed in the middle of a detection position of a measuring platform, then a magnetic gauge stand and a dial indicator are moved in a large bearing hole, then a gauge head spherical measuring rod is pressed downwards, so that a gauge head indicating needle presses a gauge for one circle, the gauge head is moved back and forth along the direction of a bus of the large bearing hole, the numerical value of the gauge head is the same as that of an outer pressing gauge, the numerical value of the gauge head is rotated to 0, and the gauge head and a gauge head telescopic rod are locked; placing the dial indicator on a standard cushion block, and forming a whole under the action of magnetic force; then, the gauge outfit in the locking state is moved in a small bearing hole, and the rotation scale of the lowest point gauge outfit found on the whole bus length of the small bearing hole is checked, wherein the value is the coaxiality of the large bearing hole and the small bearing hole;
the second gauge is a parallelism gauge of the end face of the workpiece slideway and the axial lead of the bearing hole; the second gauge comprises an auxiliary flat iron, and a guide rod fixing seat is arranged on the auxiliary flat iron; the guide rod fixing seat axially movably penetrates through the guide rod; the guide rod fixing seat is radially screwed with a locking screw compressed with the guide rod; a dial indicator is fixed at the bottom of the guide rod; the axis of the dial indicator measuring rod is parallel to the axis of the guide rod;
the second gauge detection process is as follows: firstly, after the auxiliary flat iron, a guide rod fixing seat, a guide rod, a locking screw and a dial indicator are assembled, the auxiliary flat iron is attached to the end face of a workpiece slideway, a dial indicator measuring rod is pressed on the outer side of the upper part of a large bearing hole, a pointer is pressed on a circle, the pointer is adjusted to be at 0 position, then, the end face of the auxiliary flat iron attached to the workpiece slideway is moved towards one side of the small bearing hole, the reading of the pointer at the pointer is observed, the difference between the reading of the pointer at the pointer and the reading of the initial point O is the parallelism of the end face of the workpiece slideway facing the reference large bearing hole, and the dial indicator measuring rod is pressed on the outer side of the upper part of the small bearing hole in the same manner, and is adjusted to be at 0 position according to a measuring method of the large bearing hole; then, the auxiliary flat iron is attached to one side of the workpiece slideway end face of the large bearing hole, the reading of a pointer at the gauge head is observed, and the parallelism of the workpiece slideway end face of the small reference bearing hole is measured;
the third gauge is a coaxiality gauge of two semicircle sizes of the workpiece slide rail and the positioning size of the reference end surface of the workpiece, and a perpendicularity gauge of the workpiece slide rail and the reference surface of the workpiece; the third gauge comprises a reference auxiliary positioning block and a strip-shaped auxiliary flat iron, and a guide rod fixing seat is fixed at the center of the auxiliary flat iron; the guide rod fixing seat axially movably penetrates through the guide rod; the guide rod fixing seat is radially screwed with a locking screw compressed with the guide rod; a dial indicator is fixed at the lower part of the guide rod; the axis of the dial indicator measuring rod is perpendicular to the axis of the guide rod; the reference auxiliary positioning block is fixed on the bottom surface of the auxiliary flat iron, and the center line of the auxiliary flat iron and the center line of the guide rod are on the same straight line; alloy contacts are arranged at the two outer side ends of the reference auxiliary positioning block;
the coaxiality detection process of the third detection tool on the two semicircular sizes of the workpiece slide ways and the positioning size of the reference end face of the workpiece is as follows:
after the auxiliary flat iron, the guide rod fixing seat, the guide rod, the locking screw and the dial indicator are assembled, the auxiliary flat iron is tightly attached to the end face of the workpiece slideway, two alloy contacts of the reference auxiliary positioning block are attached to the inner edge of the inner hole of the positioning spigot, the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, the measuring rod of the dial indicator is tightly pressed against the inner wall of the semicircular inner hole of the slideway, the reference auxiliary positioning block is rotated, the alloy contacts of the reference auxiliary positioning block are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the central line of the slideway is found, the gauge head pointer is pressed for one circle, and the gauge head pointer is rotated to the position of 0 to indicate that the reading is zero; then, under the guidance of an alloy contact of the reference auxiliary positioning block, rotating 180 degrees, wherein a dial indicator measuring rod is contacted with the other semicircle of the slideway; moving two alloy contacts in an inner hole of a positioning spigot, checking the standard rotation condition of a dial indicator head, finding the farthest distance between the other semicircular generatrix and the central line, and reading the dial indicator at the moment, namely, coaxiality of the two semicircular sizes of the workpiece slideway and the positioning size of the reference end surface of the workpiece;
the third gauge detects the perpendicularity of the workpiece slideway size and the workpiece reference surface as follows:
after the auxiliary flat iron, the guide rod fixing seat, the guide rod, the locking screw and the dial indicator are assembled, the auxiliary flat iron is tightly attached to the end face of the workpiece slideway, two alloy contacts of the reference auxiliary positioning block are attached to the inner edge of the inner hole of the positioning spigot, the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, the measuring rod of the dial indicator is tightly pressed against the inner wall of the semicircular inner hole of the slideway, the reference auxiliary positioning block is rotated, the alloy contacts of the reference auxiliary positioning block are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the central line of the slideway is found, the gauge head pointer is pressed for one circle, and the gauge head pointer is rotated to the position of 0 to indicate that the reading is zero; then, the locking screw is loosened, the alloy contact point position is not moved, the auxiliary flat iron position is not moved, the guide rod locking screw is loosened, the guide rod is moved upwards slowly, the guide rod is not rotated, when the measuring rod of the dial indicator head moves from the lowest end to the uppermost end of the slideway, the pointer reading of the dial indicator is observed in the whole moving stroke, and the maximum reading of the pointer is the perpendicularity of the workpiece slideway and the workpiece reference plane.
Further, the two alloy contacts and the center point of the reference auxiliary positioning block form a stable triangle structure; the axis of the dial indicator measuring rod coincides with the vertex angle bisector of the triangle.
Further, the two reference planes of the auxiliary flat iron must be strictly parallel, and the parallelism of the two reference planes is controlled within 1/3 of the required parallelism of the detected workpiece.
Compared with the prior art, the form and position tolerance checking fixture can finish the checking of the whole form and position tolerance by precisely processing the standard cushion block, the auxiliary flat iron and the reference auxiliary positioning block and matching with the prior dial indicator (dial indicator), has simple structure and low manufacturing cost, can finish the coaxiality detection of two bearing holes of a compressor body, the parallelism detection of the end face of a workpiece slide way and the bearing holes, the coaxiality detection of the two semicircular sizes of the workpiece slide way and the positioning size of the reference end face of the workpiece and the perpendicularity detection of the workpiece slide way and the reference surface of the workpiece; the precise detection of the form and position tolerance of the compressor body is ensured.
Drawings
Fig. 1 is a schematic view showing the overall structure of the first gauge and the workpiece inspection position mounting structure of the present invention.
Fig. 2 is a schematic view showing the overall structure of the second gauge and the workpiece inspection position mounting of the present invention.
Fig. 3 is a schematic top view of the third gauge and the workpiece detecting position end portion of the present invention.
Fig. 4 is a schematic view showing the overall structure of the third gauge and the workpiece detecting bit end portion of the present invention.
Description of the embodiments
The form and position tolerance gauge comprises a first gauge, a second gauge and a third gauge;
as shown in fig. 1, the first gauge is a bearing hole coaxiality gauge; the first gauge comprises a dial indicator (dial indicator) 1, an inspection platform 2 for placing a workpiece and a standard cushion block 3 arranged on the inspection platform 2; the axes of the large bearing hole A and the small bearing hole B of the workpiece are parallel to the inspection platform 2, and the top surface of the standard cushion block 3 and the other side of the inspection platform 2 are provided with a magnetic meter seat 4; the dial indicators (dial indicators) 1 are movably arranged on the two magnetic meter seats 4; the actual measurement size of the large bearing hole A is measured by the dial indicator (dial indicator) 1, the actual measurement size of the small bearing hole B is measured by the dial indicator (dial indicator) 1, and the height size delta T of the standard cushion block is a/2-B/2;
when the first gauge detects, the measured workpiece S is placed in the middle of a detection position of the measuring platform 2, then the magnetic gauge stand 4 and the dial indicator (dial indicator) 1 are moved in the large bearing hole A, then the gauge head spherical measuring rod is pressed downwards, the gauge head indicating needle is pressed for one circle, the gauge head is moved back and forth along the bus direction of the large bearing hole, the numerical value of the gauge head is the same as that of the outer pressure gauge, the numerical value of the gauge head is rotated to 0, the gauge head is locked, and the gauge head telescopic rod is arranged; placing a dial indicator (dial indicator) on the standard cushion block 3, and forming a whole under the action of magnetic force; then, the gauge outfit in the locking state is moved in a small bearing hole B, and the rotation scale of the lowest point gauge needle found on the whole bus length of the small bearing hole B is checked, wherein the value is the coaxiality of the large bearing hole A and the small bearing hole B;
as shown in fig. 2, the second gauge is a parallelism gauge of the end surface of the workpiece slide way and the axial line of the bearing hole; the second gauge comprises an auxiliary flat iron 5, and a guide rod fixing seat 6 is arranged on the auxiliary flat iron 5; the guide rod fixing seat 6 axially movably penetrates through the guide rod 7; the guide rod fixing seat 6 is radially screwed with a locking screw 8 pressed by the guide rod 7; a dial indicator (dial indicator) 1 is fixed at the bottom of the guide rod 7; the axis of the measuring rod of the dial indicator (dial indicator) 1 is parallel to the axis of the guide rod 7;
the second gauge detection process is as follows: firstly, after the auxiliary flat iron 5, the guide rod fixing seat 6, the guide rod 7, the locking screw 8 and the dial indicator (dial indicator) 1 are assembled, the auxiliary flat iron 5 is attached to the end face C of the workpiece slideway, the measuring rod of the dial indicator (dial indicator) 1 is pressed on the outer side of the upper part of the large bearing hole A, the pointer of the gauge head is pressed for one circle, the pointer is adjusted to be at 0 position, next, the auxiliary flat iron 5 is attached to the end face C of the workpiece slideway to move to one side of the small bearing hole B, the difference between the reading of the pointer at the head of the watch and the reading of the starting point O is the parallelism of the end face C of the workpiece slideway to the reference large bearing hole A, and a measuring rod of a dial indicator (dial indicator) 1 is pressed on the outer side of the upper part of the small bearing hole B in the same manner and is adjusted to be at the 0 position according to the measuring method of the large bearing hole A; then, the auxiliary flat iron 5 is attached to the end face C of the workpiece slideway to move to the side of the large bearing hole A, the reading of a pointer at the gauge head is observed, and the parallelism of the end face C of the workpiece slideway to the reference small bearing hole B is measured;
as shown in fig. 3 and fig. 4, the third gauge is a coaxiality gauge of two semicircle sizes of the workpiece slide way and a positioning size of a reference end surface of the workpiece, and a perpendicularity gauge of the workpiece slide way size and the reference surface of the workpiece; the third gauge comprises a reference auxiliary positioning block 9 and a strip-shaped auxiliary flat iron 5, and a guide rod fixing seat 6 is fixed at the center of the auxiliary flat iron 5; the guide rod fixing seat 6 axially movably penetrates through the guide rod 7; the guide rod fixing seat 6 is radially screwed with a locking screw 8 pressed by the guide rod; a dial indicator (dial indicator) 1 is fixed at the lower part of the guide rod 7; the axis of the measuring rod of the dial indicator (dial indicator) 1 is vertical to the axis of the guide rod 7; the reference auxiliary positioning block 9 is fixed on the bottom surface of the auxiliary flat iron 5, and the center line of the auxiliary flat iron 5 and the center line of the guide rod 7 are on the same straight line; alloy contacts 91 are arranged at the two outer side ends of the reference auxiliary positioning block 9;
the coaxiality detection process of the third detection tool on the two semicircular sizes of the workpiece slide way 10 and the positioning size D of the reference end face of the workpiece is as follows:
after the auxiliary flat iron 5, the guide rod fixing seat 6, the guide rod 7, the locking screw 8 and the dial indicator (dial indicator) 1 are assembled, the auxiliary flat iron 5 is tightly attached to the end face C of the workpiece slideway, two alloy contacts 91 of the reference auxiliary positioning block 9 are tightly attached to the inner edge of an inner hole (positioning size of the reference end face) D of the positioning spigot, then the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, then a measuring rod of the dial indicator (dial indicator) 1 is tightly pressed against the inner wall of a semicircular inner hole of the slideway 10, then the reference auxiliary positioning block 9 is rotated, the alloy contacts 91 of the reference auxiliary positioning block 9 are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the slideway center line is found, the pointer of the gauge head rotates to the position of 0, and the pointer of the gauge head rotates to the position to indicate that the reading is zero; then, under the guidance of an alloy contact of the reference auxiliary positioning block, rotating 180 degrees, wherein a dial indicator (dial indicator) measuring rod is contacted with the other semicircle of the slideway; moving two alloy contacts in an inner hole of a positioning spigot, checking the standard rotation condition of a dial indicator (dial indicator) head, and finding the farthest distance between the other semicircular bus and the central line, wherein the reading of the dial indicator (dial indicator) is the coaxiality of the two semicircular sizes of the workpiece slideway and the positioning size of the reference end surface of the workpiece;
the third gauge detects the perpendicularity of the workpiece slideway size and the workpiece reference surface as follows:
after the auxiliary flat iron 5, the guide rod fixing seat 6, the guide rod 7, the locking screw 8 and the dial indicator (dial indicator) 1 are assembled, the auxiliary flat iron 5 is tightly attached to the end face C of the workpiece slideway, two alloy contacts 91 of the reference auxiliary positioning block 9 are tightly attached to the inner edge of an inner hole (positioning size of the reference end face) D of the positioning spigot, then the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, then a measuring rod of the dial indicator (dial indicator) 1 is tightly pressed against the inner wall of a semicircular inner hole of the slideway 10, then the reference auxiliary positioning block 9 is rotated, the alloy contacts 91 of the reference auxiliary positioning block 9 are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the slideway center line is found, the pointer of the gauge head rotates to the position of 0, and the pointer of the gauge head rotates to the position to indicate that the reading is zero; then, the locking screw is loosened, the alloy contact position is not moved, the auxiliary flat iron position is not moved, the guide rod locking screw is loosened, the guide rod is moved upwards slowly, the guide rod is not rotated, when the measuring rod of the dial indicator (dial indicator) head is moved from the lowest end to the uppermost end of the slideway, the pointer reading of the dial indicator (dial indicator) is observed in the whole moving stroke, and the maximum reading of the pointer is the perpendicularity of the workpiece slideway and the workpiece reference surface.
The two alloy contacts 91 and the center point of the reference auxiliary positioning block 9 form a stable triangle structure; and the axis of the measuring rod of the dial indicator (dial indicator) 1 coincides with the vertex angle bisector of the triangle.
The two reference planes of the auxiliary flat iron 5 must be strictly parallel, and the parallelism is controlled within 1/3 of the required value of the parallelism of the detected workpiece.
The above embodiments are merely preferred embodiments of the present invention, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the invention are therefore intended to be embraced therein.
Claims (3)
1. A form and position tolerance examines utensil, its characterized in that: the device comprises a first gauge, a second gauge and a third gauge;
the first gauge is a bearing hole coaxiality gauge; the first gauge comprises a dial indicator, a checking platform for placing a workpiece and a standard cushion block arranged on the checking platform; the axes of the large bearing hole and the small bearing hole of the workpiece are parallel to the inspection platform, and the top surface of the standard cushion block and the other side of the inspection platform are provided with a magnetometer seat; the dial indicators are movably arranged on the two magnetic meter seats; the actual measurement size of the large bearing hole measured by the dial indicator is a, the actual measurement size of the small bearing hole measured by the dial indicator is b, and the height size of the standard cushion block is a/2-b/2;
when the first gauge detects, a measured workpiece is placed in the middle of a detection position of a measuring platform, then a magnetic gauge stand and a dial indicator are moved in a large bearing hole, then a gauge head spherical measuring rod is pressed downwards, so that a gauge head indicating needle presses a gauge for one circle, the gauge head is moved back and forth along the direction of a bus of the large bearing hole, the numerical value of the gauge head is the same as that of an outer pressing gauge, the numerical value of the gauge head is rotated to 0, and the gauge head and a gauge head telescopic rod are locked; placing the dial indicator on a standard cushion block, and forming a whole under the action of magnetic force; then, the gauge outfit in the locking state is moved in a small bearing hole, and the rotation scale of the lowest point gauge outfit found on the whole bus length of the small bearing hole is checked, wherein the value is the coaxiality of the large bearing hole and the small bearing hole;
the second gauge is a parallelism gauge of the end face of the workpiece slideway and the axial lead of the bearing hole; the second gauge comprises an auxiliary flat iron, and a guide rod fixing seat is arranged on the auxiliary flat iron; the guide rod fixing seat axially movably penetrates through the guide rod; the guide rod fixing seat is radially screwed with a locking screw compressed with the guide rod; a dial indicator is fixed at the bottom of the guide rod; the axis of the dial indicator measuring rod is parallel to the axis of the guide rod;
the second gauge detection process is as follows: firstly, after the auxiliary flat iron, a guide rod fixing seat, a guide rod, a locking screw and a dial indicator are assembled, the auxiliary flat iron is attached to the end face of a workpiece slideway, a dial indicator measuring rod is pressed on the outer side of the upper part of a large bearing hole, a pointer is pressed on a circle, the pointer is adjusted to be at 0 position, then, the end face of the auxiliary flat iron attached to the workpiece slideway is moved towards one side of the small bearing hole, the reading of the pointer at the pointer is observed, the difference between the reading of the pointer at the pointer and the reading of the initial point O is the parallelism of the end face of the workpiece slideway facing the reference large bearing hole, and the dial indicator measuring rod is pressed on the outer side of the upper part of the small bearing hole in the same manner, and is adjusted to be at 0 position according to a measuring method of the large bearing hole; then, the auxiliary flat iron is attached to one side of the workpiece slideway end face of the large bearing hole, the reading of a pointer at the gauge head is observed, and the parallelism of the workpiece slideway end face of the small reference bearing hole is measured;
the third gauge is a coaxiality gauge of two semicircle sizes of the workpiece slide rail and the positioning size of the reference end surface of the workpiece, and a perpendicularity gauge of the workpiece slide rail and the reference surface of the workpiece; the third gauge comprises a reference auxiliary positioning block and a strip-shaped auxiliary flat iron, and a guide rod fixing seat is fixed at the center of the auxiliary flat iron; the guide rod fixing seat axially movably penetrates through the guide rod; the guide rod fixing seat is radially screwed with a locking screw compressed with the guide rod; a dial indicator is fixed at the lower part of the guide rod; the axis of the dial indicator measuring rod is perpendicular to the axis of the guide rod; the reference auxiliary positioning block is fixed on the bottom surface of the auxiliary flat iron, and the center line of the auxiliary flat iron and the center line of the guide rod are on the same straight line; alloy contacts are arranged at the two outer side ends of the reference auxiliary positioning block;
the coaxiality detection process of the third detection tool on the two semicircular sizes of the workpiece slide ways and the positioning size of the reference end face of the workpiece is as follows:
after the auxiliary flat iron, the guide rod fixing seat, the guide rod, the locking screw and the dial indicator are assembled, the auxiliary flat iron is tightly attached to the end face of the workpiece slideway, two alloy contacts of the reference auxiliary positioning block are attached to the inner edge of the inner hole of the positioning spigot, the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, the measuring rod of the dial indicator is tightly pressed against the inner wall of the semicircular inner hole of the slideway, the reference auxiliary positioning block is rotated, the alloy contacts of the reference auxiliary positioning block are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the central line of the slideway is found, the gauge head pointer is pressed for one circle, and the gauge head pointer is rotated to the position of 0 to indicate that the reading is zero; then, under the guidance of an alloy contact of the reference auxiliary positioning block, rotating 180 degrees, wherein a dial indicator measuring rod is contacted with the other semicircle of the slideway; moving two alloy contacts in an inner hole of a positioning spigot, checking the standard rotation condition of a dial indicator head, finding the farthest distance between the other semicircular generatrix and the central line, and reading the dial indicator at the moment, namely, coaxiality of the two semicircular sizes of the workpiece slideway and the positioning size of the reference end surface of the workpiece;
the third gauge detects the perpendicularity of the workpiece slideway size and the workpiece reference surface as follows:
after the auxiliary flat iron, the guide rod fixing seat, the guide rod, the locking screw and the dial indicator are assembled, the auxiliary flat iron is tightly attached to the end face of the workpiece slideway, two alloy contacts of the reference auxiliary positioning block are attached to the inner edge of the inner hole of the positioning spigot, the movable guide rod is moved to the lowest end of the slideway, the locking screw is screwed, the measuring rod of the dial indicator is tightly pressed against the inner wall of the semicircular inner hole of the slideway, the reference auxiliary positioning block is rotated, the alloy contacts of the reference auxiliary positioning block are moved along the inner edge of the inner hole of the positioning spigot, the farthest point of the slideway bus from the central line of the slideway is found, the gauge head pointer is pressed for one circle, and the gauge head pointer is rotated to the position of 0 to indicate that the reading is zero; then, the locking screw is loosened, the alloy contact point position is not moved, the auxiliary flat iron position is not moved, the guide rod locking screw is loosened, the guide rod is moved upwards slowly, the guide rod is not rotated, when the measuring rod of the dial indicator head moves from the lowest end to the uppermost end of the slideway, the pointer reading of the dial indicator is observed in the whole moving stroke, and the maximum reading of the pointer is the perpendicularity of the workpiece slideway and the workpiece reference plane.
2. The form and position tolerance gauge according to claim 1, wherein: two alloy contacts and a central point of the reference auxiliary positioning block form a stable triangle structure; the axis of the dial indicator measuring rod coincides with the vertex angle bisector of the triangle.
3. The form and position tolerance gauge according to claim 1, wherein: the two reference planes of the auxiliary flat iron must be strictly parallel, and the parallelism of the two reference planes is controlled within 1/3 of the required parallelism of the detected workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310169034.2A CN116067253A (en) | 2023-02-27 | 2023-02-27 | Form and position tolerance gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310169034.2A CN116067253A (en) | 2023-02-27 | 2023-02-27 | Form and position tolerance gauge |
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| Publication Number | Publication Date |
|---|---|
| CN116067253A true CN116067253A (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310169034.2A Pending CN116067253A (en) | 2023-02-27 | 2023-02-27 | Form and position tolerance gauge |
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| CN (1) | CN116067253A (en) |
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2023
- 2023-02-27 CN CN202310169034.2A patent/CN116067253A/en active Pending
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