CN113732631A

CN113732631A - Axle dihedral angle intersection point size suspended position gauge and machining method thereof

Info

Publication number: CN113732631A
Application number: CN202111064394.3A
Authority: CN
Inventors: 唐建群; 凌云; 谭俊成; 胡华; 姚见春; 李思权; 张伟; 胡玉岗; 李涛
Original assignee: Chongqing Jianshe Industry Group Co Ltd
Current assignee: Chongqing Jianshe Industry Group Co Ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2021-12-03
Anticipated expiration: 2041-09-10
Also published as: CN113732631B

Abstract

The invention discloses a shaft type dihedral angle intersection point size suspended position gauge and a machining method thereof, which can reduce the machining difficulty of the shaft type dihedral angle intersection point size suspended position gauge and improve the production efficiency. The supporting block is provided with a left blocking part, a supporting part and a right blocking part, a mouth is formed between the left blocking part, the supporting part and the right blocking part, two opposite surfaces of the mouth are processing reference surfaces A, the rear end surface of the mouth is a processing surface C, the back surface of the left blocking part/the right blocking part is a processing reference surface B, the bottom surface of the supporting block is a processing reference surface C, the front end surface of the left blocking part/the right blocking part is a processing reference surface D, the left blocking part and the right blocking part are in a stepped shape, the upper end surface of the low end is a processing surface B, and the front end surface of the high end is a processing surface a; the supporting part is longitudinally provided with an insertion hole of a dihedral angle shaft, the dihedral angle shaft is in clearance fit in the insertion hole, and the dihedral angle shaft and the supporting block are locked through a pin.

Description

Axle dihedral angle intersection point size suspended position gauge and machining method thereof

Technical Field

The invention relates to the technical field of measuring tools, in particular to a suspended position gauge for the size of an intersection point of axial dihedral angles and a processing method thereof.

Background

Fig. 1 is a schematic diagram of an improved front gauge, and the gauge comprises six parts, namely a dihedral angle shaft 1, a left baffle plate 2, a support block 3, a right baffle plate 4, a screw 5 and a pin 6, wherein the left baffle plate 2, the support block 3 and the right baffle plate 4 are combined into a whole by tightening the screw 5, and then are fixedly matched on the dihedral angle shaft 1 by the pin 6. The symmetry degree of a solid circle phi A0-0.005 and a notch B + 0.0050 in the dihedral angle shaft 1 is required to be controlled within 0.005mm, the a surfaces of the left baffle 2 and the right baffle 4 are flush with the C surface of the supporting block 3, the B surfaces of the left baffle 2 and the right baffle 4 are flush, and the distance to the axis of the dihedral angle shaft 1 is C +/-0.005. The distance from a suspension point formed by the upward offset distance D of the axis of the dihedral angle shaft 1 virtual circle phi B0-0.005 to the surfaces a of the left baffle plate 2 and the right baffle plate 4 and the surface c of the supporting block 3 is A +/-0.005. Before improvement, the gauge type dihedral angle shaft 1, the left baffle 2, the supporting block 3 and the right baffle 4 are made of 10-grade steel, carburized depth of 1-1.2 mm and quenched (58-6 +5) HRC. The following process flow is adopted for the dihedral angle shaft 1: blanking → turning the excircle phi A0-0.005 (note: leaving 0.5mm allowance) of the solid body → milling the dihedral angle surface 202 → semi-finished product inspection → heat treatment carburization depth 1-1.2 mm, quenching (58-65) HRC → external grinding the solid body circle phi A0-0.005, finish Ra0.2um → grinding the right end surface by a tool, finish Ra0.4um → grinding the dihedral angle surface 202 on a flat grinder by matching a sine gauge and an angle block, finish Ra0.2um → bench work grinding, assembling → lettering → finished product inspection. The following process flows are adopted for the left baffle 2 and the right baffle 4: blanking → milling hexagonal → marking → milling a, b surfaces → drilling screw, pin hole → semi-finished product inspection → heat treatment carburization depth 1-1.2 mm, quenching (58-65) HRC → flat grinding hexagonal and a, b surfaces, and smoothness Ra0.2um. The following process flow is adopted for the supporting block 3: blanking → milling hexagonal → marking → digging hole phi (A +0.5) H8, leaving 0.5mm allowance → drilling screw hole → semi-finished product inspection → heat treatment carburization depth 1-1.2 mm, quenching (58-65) HRC → flat grinding hexagonal, finish Ra0.2um → coordinate grinding hole phi (A +0.5) H8, and finish Ra0.2um. After the dihedral angle shaft 1, the left baffle plate 2, the supporting block 3 and the right baffle plate 4 are independently processed to be qualified, firstly, a universal tool microscope is adopted to detect the distance A 'from the entity circle phi A0-0.005 to the right end face of the dihedral angle shaft 1, then a technician calculates the actual value A' from the suspended intersection point on the virtual circle phi B0-0.005 to the right end face of the shaft through UG three-dimensional modeling according to the actual value A ', then after three workpieces a, B and c of the left baffle plate 2, the supporting block 3 and the right baffle plate 4 are flush, the workpieces are fixed by a special bow clamp, and are tightened by a screw 5 and fastened by a pin 6, the distance from the a face to the right end face of the shaft in the left baffle plate 2 and the right baffle plate 4 is ensured to be (A' -A) during assembly, and the suspended intersection point size D and A +/-0.005 of the dihedral angle shaft 1 are ensured by the connection. Influenced by factors such as large dihedral angle manual calculation difficulty coefficient, large dihedral angle entity circle intersection point size measurement error, abrasion of a grinding wheel, large clamping error and the like, the gauge processed by the process has the following defects:

1. the symmetry of the solid circle phi A0-0.005 and the opening B + 0.0050 is usually out of tolerance of 0.001-0.003 mm.

2. The surfaces of the three part numbers a, b and c of the left baffle 2, the supporting block 3 and the right baffle 4 are not level, and the general out-of-tolerance is about 0.002 mm.

3. During periodic calibration, the size A +/-0.005 of the suspended point on the dihedral angle virtual circle of the gauge is retested and generally comes in and goes out about 0.005 mm.

4. The qualification rate is low, the repair is serious, and the production efficiency is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides the shaft type dihedral intersection point size suspended position gauge and the processing method thereof, which can greatly reduce the processing difficulty of the shaft type dihedral intersection point size suspended position gauge and improve the production efficiency.

The purpose of the invention is realized as follows:

the supporting block is provided with a left blocking part, a supporting part and a right blocking part, a mouth is formed between the left blocking part, the supporting part and the right blocking part, two opposite surfaces of the mouth are processing reference surfaces A, the rear end surface of the mouth is a processing surface C, the back surface of the left blocking part/the right blocking part is a processing reference surface B, the bottom surface of the supporting block is a processing reference surface C, the front end surface of the left blocking part/the right blocking part is a processing reference surface D, the reference surfaces B, the reference surfaces C and the reference surfaces D are perpendicular to each other, the left blocking part and the right blocking part are in a stepped shape, the upper end surface of a low end is a processing surface B, and the front end surface of a high end is a processing surface a;

the supporting part is longitudinally provided with an insertion hole of a dihedral angle shaft, the dihedral angle shaft is in clearance fit in the insertion hole, and the dihedral angle shaft and the supporting block are locked through two pins.

A method for processing a suspended position gauge for the size of an intersection point of axial dihedral angles,

processing supporting block

Finely machining the outer surface of the supporting block, wherein the outer surface comprises a machining datum plane A, a datum plane B, a datum plane C and a datum plane D;

cutting an insertion hole, a reference surface A and a processing surface C by taking the reference surface B and the reference surface C as slow-walking wire cutting and wire touching references;

cutting a processing surface a and a processing surface b by taking the reference surface C and the reference surface D as the reference of the slow-walking wire cutting touch wire;

processing a dihedral angle shaft

Finishing the dihedral angle shafts, and cutting and processing the angle surfaces at the front ends of the dihedral angle shafts by adopting slow-feeding wires;

and matching the dihedral angle shaft with the insertion hole of the supporting block, and assembling the symmetry and the suspended intersection point of the dihedral angle of the virtual circle between the dihedral angle shaft and the opening by using the gauge.

Preferably, the checking fixture comprises a base body, a checking cylinder is arranged at one end of the base body, an end part of the checking cylinder is a checking fixture angle surface, the checking fixture angle surface is the same as an angle surface of a dihedral angle shaft, the outer diameter of the checking cylinder corresponds to the diameter of the virtual circle of the gauge, the diameter of a through hole of the checking cylinder corresponds to the diameter of the dihedral angle shaft, the rear end surface of the base body is a detection surface a, the upper end surface of the base body is a detection surface b, and the width of the detection surface corresponds to the width of the supporting block opening.

Preferably, the method for assembling the symmetry degree between the dihedral angle axis and the mouth and the suspended intersection point of the dihedral angle of the virtual circle by the gauge comprises the following steps:

assemble the supporting shoe on the dihedral angle axle excircle earlier, will examine a straight-through hole and assemble with dihedral angle axle excircle after that, examine a detection face a, the machined surface c cooperation of supporting shoe, then place the block gauge on the machined surface b of supporting shoe, guarantee that the plane flushes with examining a detection face b on the block gauge, indirectly guarantee the distance of machined surface b to dihedral angle axle axial lead, at last through horizontal migration dihedral angle axle, guarantee that examine a dihedral angle face and gauge dihedral angle face and flush, the rethread pin fastening, prevent that the work piece from rotating, indirectly guarantee the unsettled nodical size of gauge dihedral angle.

Preferably, the dihedral angle suspension point size of the checking fixture is smaller than 1mm, and the dihedral angle suspension point size is indirectly guaranteed through a block gauge when the checking fixture is assembled with a workpiece, so that the manufacturing difficulty coefficient of the checking fixture is reduced.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

the method can greatly reduce the processing difficulty of the position gauge for hanging the size of the shaft dihedral intersection point, improves the production efficiency by more than 3 times, prolongs the service life by more than 1 time, ensures the quality consistency and stability of the measured piece, and is suitable for manufacturing and detecting the position gauge for hanging the size of the shaft dihedral intersection point of a single piece and small batch similar to the structure.

Drawings

FIG. 1 is a schematic diagram of a gauge prior to modification;

FIG. 2 is a schematic diagram of a modified gauge;

FIG. 3 is a schematic view of the support block configuration;

FIG. 4 is a schematic structural view of the gauge;

FIG. 5 is a schematic view of a gauge in use.

Reference numerals

In the attached drawing, 1-dihedral angle shaft, 2-left baffle, 3-supporting block, 4-right baffle, 5-screw, 6-pin, 7-seat body and 8-detection cylinder.

Detailed Description

A method for processing a position gauge with suspended size of an intersection point of axial dihedral angles. The method mainly aims at the gauge shown in figure 1, three parts of a left baffle 2, a supporting block 3 and a right baffle 4 in figure 1 are combined into an integrated supporting block according to the structure shown in figure 2, three reference surfaces B, C, D are added, the two reference surfaces are mutually vertical, the tolerance is controlled to be +/-1', when the supporting block is cut and processed by adopting a slow-walking wire, the reference surface B, C is used as the reference of the slow-walking wire cutting and wire touching, a cutting hole phi (B +0.5) H8 and a hole B + 0.0050 are cut, and the symmetry between the holes is controlled to be within 0.005 mm. And cutting the a surface and the b surface by taking the C, D reference surface as the reference of the slow-speed wire cutting touch wire, wherein the distance between the b surface and the hole phi (A +0.5) H8 is C +/-0.005. After the angle surface 202 formed by alpha and beta in the dihedral angle shaft 1 is qualified by cutting through a slow-moving wire, the angle surface is matched with a supporting block hole phi (B +0.5) H8, and the precision gauge shown in figure 4 is adopted to assemble the symmetry between a solid circle phi A0-0.005 and a hole B + 0.0050 and the coordinate dimension D and A +/-0.005 of the suspended intersection point of the dihedral angle of a virtual circle phi B0-0.005. The method can greatly reduce the processing difficulty of the shaft dihedral intersection point size suspended position gauge, improves the production efficiency by more than 3 times, ensures the quality consistency and stability of the measured piece, and is suitable for manufacturing and detecting the single-piece and small-batch shaft dihedral intersection point size suspended position gauge similar to the structure. (Note that the desired intersection size is not physical for the overhead intersection, e.g., intersection A, D is on a virtual circle φ B. the virtual circle is either a physical circle, e.g., φ A is a physical circle and φ B is a virtual circle.)

Fig. 2 is a structure diagram of an improved gauge, the left baffle 2, the support block 3 and the right baffle 4 in fig. 1 are combined into an integrated support block, as shown in a schematic structural diagram of the support block in fig. 3, B, C, D reference surfaces are added, the two reference surfaces are perpendicular to each other, the tolerance is controlled to be +/-1', the support block material is changed from No. 10 steel into Cr12MoV and quenched (58-65) HRC, and the following process flow is adopted: blanking → milling hexagonal → marking → digging a threading hole, wherein the threading hole is generally 1/3 of phi (A +0.5) H8 → semi-finished product inspection → heat treatment → flat grinding hexagonal, the smooth finish Ra0.2um and B, C, D surfaces are mutually vertical, and the tolerance is controlled to +/-1' → slow-moving wire cutting processing hole phi (A +0.5) H8, a mouth B + 0.0050, a hole pitch C +/-0.005 and a surface abc. The slow-running wire cutting process is detailed as follows: the B, C reference surface is used as the reference of the slow-speed wire cutting touch wire, the cutting hole phi (A +0.5) H8 and the opening B + 0.0050 are cut, and the symmetry between the opening and the hole is controlled within 0.005 mm; and cutting the a surface and the b surface by taking the C, D reference surface as the reference of the slow-speed wire cutting touch wire, wherein the distance between the b surface and the hole phi (A +0.5) H8 is C +/-0.005. The material and the heat treatment process of the dihedral angle shaft 1 are unchanged, and the following process flows are adopted: blanking → turning the excircle phi A0-0.005 (note: leaving 0.5mm allowance) of the solid body → milling the dihedral angle face 202 → semi-finished product inspection → heat treatment carburization depth 1-1.2 mm, quenching (58-65) HRC → external grinding the solid body circle phi A0-0.005, smoothness Ra0.2um → cutting the dihedral angle face 202 by a sine gauge and an angle block by adopting a slow-moving wire, smoothness Ra0.2um → benchwork grinding and pressing, assembling → character carving → finished product inspection.

FIG. 4 is a schematic diagram of a precision clamp, which comprises a base 6 and a detecting cylinder 7, wherein the dihedral angle tolerance is controlled within +/-1', the hole and shaft excircle precision is 1 time higher than that of a gauge, and the size precision of a suspended intersection point is one time higher than that of the gauge. The alpha value and the beta value are consistent with the dihedral angle values of the gauge, the through hole phi (A-0.003) 0-0.003 corresponds to the solid circle phi A0-0.005 of the gauge, the excircle phi B0-0.003 corresponds to the virtual circle phi B0-0.005 of the gauge, the dihedral angle suspension point size A +/-0.003 corresponds to the dihedral angle suspension point size A +/-0.005 of the gauge, and the dihedral angle suspension point size A +/-0.003) 0-0.003 corresponds to the gauge mouth B + 0.0050 of the gauge, namely the dimensional accuracy of the gauge is improved by nearly one time compared with the corresponding dimensional accuracy of the gauge, the dihedral angle suspension point size A +/-0.003 can be smaller by more than 1mm, and the dihedral angle suspension point size A +/-0.005 is indirectly ensured by the gauge when the gauge is assembled with the workpiece, so as to reduce the manufacturing difficulty coefficient of the gauge. The checking fixture is made of high-speed steel materials, the hardness is more than or equal to 58HRC, the process adopts a grinder to grind inner holes phi (A-0.003) 0-0.003, the degree of finish Ra0.2um, MGBA1420A to grind outer circles phi B0-0.003, the degree of finish Ra0.2um, ab surfaces are ground and are vertical to each other, the degree of finish Ra0.2um, Beijing Azimulus CA30 slow-running wire cutting process ensures the angles alpha and beta of the dihedral angle 202 and the degree of finish Ra0.2um. And then, detecting an actual value E of the dihedral angle A +/-0.003 by using a universal tool microscope, wherein the value E is equal to A +/-0.003 or smaller by more than 1mm, and the block gauge is convenient to assemble with the gauge. The E value is engraved on the checking fixture so as to be convenient for gauge assembly by directly utilizing data when being reused, and auxiliary time of instrument detection, technician conversion and the like is reduced. The data is not recommended to be directly written on the dihedral angle plane, the measurement plane or the reference plane, and the manufacturing and detection precision is not influenced.

After the dihedral angle shaft 1, the supporting block and the precision gauge are processed to be qualified, according to an assembly schematic diagram of the gauge and the gauge shown in fig. 5, the supporting block is assembled at the position of a circle phi (A +0.5) H8 of the dihedral angle shaft 1, then the through hole phi (A-0.003) 0-0.003 of the gauge and the entity circle phi A0-0.005 of the dihedral angle shaft 1 are assembled, the thickness (A-E) ± 0.003 of a cushion block gauge between the surface a of the gauge and the surface a and the surface C of the gauge supporting block is detected, then the thickness of the split gauge is 15mm and placed on the surface b of the supporting block, the upper plane of the split gauge is enabled to be flush with the surface b of the gauge, and the distance from the surface b of the gauge to the axis of the dihedral angle shaft 1 is indirectly ensured to be C +/-0.005. Finally, the dihedral angle surface 102 of the checking fixture is enabled to be flush with the dihedral angle surface 202 of the gauge by horizontally moving the dihedral angle shaft 1, and the workpiece is prevented from rotating by fastening the dihedral angle surface with the pin 3, so that the sizes A +/-0.005 and D of the suspended intersection point of the dihedral angle of the gauge can be indirectly guaranteed.

The dihedral angle is constructed as follows: fig. 2 is a diagram of a gauge structure, which is a diagram of a finished gauge after improvement, wherein fig. 2(a) shows a schematic structural diagram before a plane 201 of the gauge forms an angle α with an axial line and the formed angle plane 201 is not rotated outward, and fig. 2(b) shows a schematic structural diagram after the plane 201 of the gauge is rotated outward by an angle β. Fig. 4 is a schematic diagram of a precision gauge, which is a diagram of a finished gauge, wherein fig. 4(a) shows a schematic diagram of a structure before a surface of a workpiece 101 and an axis line form an included angle α and the formed angle surface 101 is not rotated outward, and fig. 4(b) shows a schematic diagram of a structure after the surface of the workpiece 101 is rotated outward by an angle β. (Note: the surfaces of the gauge and the testing tool are simultaneously rotated outwards, see FIG. 5, so that the corresponding surfaces of the gauge and the testing tool are parallel during assembly)

The processing cautions of the measurement gauge for the size of the intersection point of the two plane angles of the shaft are as follows: the matching part phi (A +0.5) H8 of the dihedral angle shaft 1 and the supporting block is larger than the solid circle phi A0-0.005 by 0.5mm and more, and the supporting block hole can prevent the solid circle phi A0-0.005 of the dihedral angle shaft 1 from scratching during assembly. Secondly, when the supporting block adopts a slow-running wire cutting process, the material must be replaced by a material matched with the process, the flatness of the B, C, D base plane and the vertical relation between the base plane and the base plane are controlled, the clamping error during cutting is reduced, the surface hardness of the gauge is ensured, and the service life of the gauge is ensured to be controlled. Thirdly, when the surface 202 of the dihedral angle axis 1 is processed by adopting a slow-moving wire cutting process, the direction of the surface can be not considered, but the values of alpha and beta must be ensured. And fourthly, fixing the dihedral angle shaft 1 and the supporting block by using a pin to prevent the gauge from rotating when in use, so that the size A +/-0.005 of the dihedral angle suspended intersection point changes. The precision gauge is used for assembling or detecting the position gauge of the size of the suspended intersection point of the dihedral angle of the shaft, and the precision grade is one level higher than that of the gauge in principle.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an unsettled position gauge of nodical size of axle type dihedral angle which characterized in that: the supporting block is provided with a left blocking part, a supporting part and a right blocking part, a mouth is formed between the left blocking part, the supporting part and the right blocking part, two opposite surfaces of the mouth are processing reference surfaces A, the rear end surface of the mouth is a processing surface C, the back surface of the left blocking part/the right blocking part is a processing reference surface B, the bottom surface of the supporting block is a processing reference surface C, the front end surface of the left blocking part/the right blocking part is a processing reference surface D, the reference surfaces B, the reference surfaces C and the reference surfaces D are mutually vertical, the left blocking part and the right blocking part are in a stepped shape, the upper end surface of the low end is a processing surface B, and the front end surface of the high end is a processing surface a;

2. A method of machining a gauge for measuring the intersection point size of two axial angles of claim 1, comprising:

processing supporting block

processing a dihedral angle shaft

3. The method for processing the shaft-type dihedral intersection dimension hanging position gauge according to claim 2, wherein the method comprises the following steps: the checking fixture comprises a base body, a checking barrel is arranged at one end of the base body, the end part of the checking barrel is a checking fixture angle surface, the checking fixture angle surface is the same as the angle surface of a dihedral angle shaft, the outer diameter of the checking barrel corresponds to the diameter of a virtual circle of the gauge, the diameter of a through hole of the checking barrel corresponds to the diameter of the dihedral angle shaft, the rear end surface of the base body is a detection surface a, the upper end surface of the base body is a detection surface b, and the width of the detection surface corresponds to the width of the supporting block opening.

4. The method for processing the suspended position gauge of the shaft dihedral angle intersection dimension according to claim 3, wherein the method for assembling the detecting tool with the suspended intersection of the symmetry degree and the virtual circle dihedral angle between the dihedral angle shaft and the mouth comprises the following steps:

5. The method of claim 4, wherein the method comprises the steps of: the size of the dihedral angle suspension point of the checking fixture is smaller than 1mm, and the dihedral angle suspension point size is indirectly guaranteed through a block gauge when the checking fixture is assembled with a workpiece, so that the manufacturing difficulty coefficient of the checking fixture is reduced.