CN221006199U - Tool for measuring flatness of end face of annular workpiece - Google Patents

Abstract

The utility model discloses a tool for measuring the flatness of the end face of an annular workpiece, which comprises a tool main body, wherein a concave structure and a positioning structure are arranged on a reference surface of the tool main body, a matching cavity is formed in the concave structure, and the positioning structure is used for radially limiting the end face to be measured of the annular workpiece on the reference surface through the matching of the matching cavity; according to the utility model, the end face to be measured of the annular workpiece after radial positioning and installation can be attached to the reference surface of the tool main body, and the end face flatness of the annular workpiece can be measured through a single feeler gauge, so that the measuring efficiency and accuracy are improved.

Description

Tool for measuring flatness of end face of annular workpiece

Technical Field

The utility model relates to a tool for measuring flatness of a workpiece, in particular to a tool for measuring flatness of an end face of an annular workpiece.

Background

In order to ensure the quality of the workpiece, the machined workpiece needs to be subjected to multiple index detection, unqualified workpieces are found in time, and the end surface flatness measurement of the workpiece is an important detection item, and the detection items are divided into two types according to the detected object, namely the end surface flatness measurement of the long workpiece and the end surface flatness measurement of the annular workpiece; when the end surface flatness of the annular workpiece is measured, the workpiece is required to be placed on a reference surface of a workbench, the reference surface of the workbench is a flat surface, and a measuring tool is used for measuring the end surface to be measured of the annular workpiece; in actual batch production, production personnel carry annular workpieces of the same batch to a detection site in a concentrated manner for detection, generally use a feeler gauge for measurement, plug the feeler gauge into a gap formed between the end face to be detected of the annular workpieces and a reference surface of a workbench, and obtain the flatness of the end face to be detected of the annular workpieces according to the thickness capable of being plugged into the feeler gauge so as to be used for judging the qualification condition of the annular workpieces.

When the clearance gauge is used for measuring the flatness of the end face of the annular workpiece, as most of the end faces to be measured of the annular workpiece are planes, such as the shaft rings of the bearing, and the two end faces of the shaft rings are planes, the shaft rings can be directly placed on the reference surface of the workbench, the clearance formed between the end faces to be measured of the shaft rings and the reference surface of the workbench is small, and the flatness measurement of the end face can be completed by plugging a single clearance gauge; however, in actual production, a part of the end faces of the annular workpiece to be detected are also provided with a convex structure, such as a bottom ring of a bearing, one end face of the bottom ring is a plane, and the other end face of the bottom ring is provided with an annular convex rib which is used for connecting the bottom ring with the shaft ring; when the flatness measurement is carried out on the end face with the annular convex ribs, the annular convex ribs separate the end face to be measured of the bearing bottom ring from the reference surface of the workbench to form a larger gap, a plurality of feelers need to be plugged into the gap by production personnel to measure, the measurement efficiency is seriously affected, and a plurality of feelers are stacked to easily form accumulated errors to influence the measurement accuracy.

Disclosure of utility model

The utility model aims to provide a tool for measuring the flatness of the end face of an annular workpiece, which can be matched with a convex structure on the end face to be measured of the annular workpiece, so that the end face to be measured of the annular workpiece is attached to a reference surface of a tool main body, and the measuring efficiency and accuracy are improved.

The aim of the utility model is achieved by the following technical scheme:

The utility model provides a frock for cyclic annular work piece terminal surface roughness measurement, includes the frock main part, is provided with concave structure and location structure on the reference surface of frock main part, forms the cooperation cavity in concave structure's inside, and location structure is used for through the cooperation of cooperation cavity is radially limited the terminal surface that awaits measuring of cyclic annular work piece on the reference surface.

Through set up location structure and concave structure on the reference surface of frock main part, let cyclic annular work piece can radial location install fast in the frock main part, simultaneously owing to with the protruding structure cooperation on the terminal surface that awaits measuring of work piece in concave structure inside to the terminal surface that awaits measuring of cyclic annular work piece after avoiding radial location installation forms great clearance with the top of frock main part, the terminal surface flatness measurement of cyclic annular work piece can be accomplished to the production personnel's stopper single feeler gauge, has improved measurement of efficiency.

Based on the technical scheme, the utility model can be improved as follows:

further, the positioning structure comprises at least three positioning blocks, the positioning blocks are distributed along the circumferential direction of the concave structure, when the positioning blocks are positioned and installed, the positioning ends of the positioning blocks are attached to the side wall of the annular workpiece, and the concave structure is located at the center of the datum plane of the tool main body and matched with the convex structure on the end face of the annular workpiece to be detected.

Through at least three locating piece, make the locating point that forms at least three reference surface center department around the frock main part on the frock main part to restrict the radial degree of freedom of annular work piece, be convenient for the production personnel and measure, simultaneously through setting up concave structure in the reference surface center department of frock main part, with the protruding structure cooperation on the terminal surface that awaits measuring of annular work piece.

Further, the positioning structure further comprises a guide channel, and the positioning block can move relative to the tool main body along the guide channel according to a preset track so as to adjust the installation position of the positioning block.

The guide channel can guide the positioning block to move relative to the tool main body according to a preset track, so that production personnel can adjust the mounting position of the positioning block in a moving mode according to the size of the annular workpiece to be measured, repeated integral disassembly of the tool is avoided, and the measurement efficiency is improved.

Further, each positioning block is connected to the reference surface of the tool main body through two bolt positions, and a long through hole for a bolt to pass through is formed in each positioning block, and is the guide channel; the positioning block is matched with the long through hole through a bolt and can move towards or back to the center of the datum plane on the datum plane of the tool main body.

Through the cooperation of bolt and elongated through-hole, only need unscrew the position that the bolt can adjust the locating piece, need not to dismantle the bolt completely, the locating piece still is connected on the frock main part, avoids bolt and locating piece to scatter and lose.

Further, the guide channel is a radial positioning groove arranged on the datum plane of the tool main body, the radial positioning grooves are distributed along the circumferential direction of the groove structure, a positioning block is slidably arranged in each radial positioning groove, and the positioning block can move towards or back to the center of the datum plane along the radial positioning groove.

Through set up radial positioning groove on the reference surface of frock main part, locating piece slidable mounting can adjust the position of locating piece in radial positioning groove to sliding mode, improved measurement of efficiency and application scope, the locating piece slides along radial positioning groove moreover, is difficult to produce not hard up or skew, has improved the position adjustment accuracy of locating piece, has reduced the length of locating piece simultaneously, and then has increased the gliding space of locating piece in the constant head tank, and the removal formation of locating piece is corresponding to be increased.

Further, the top of the positioning block extends out of the top of the radial positioning groove to form an extension part, and the extension part of the positioning block is higher than the top end of the annular workpiece after positioning and installation.

The top extension part of the positioning block is higher than the top end of the annular workpiece after positioning and installation, so that the positioning and installation failure caused by the fact that the annular workpiece is separated from the positioning block during measurement is avoided.

Further, one end of the radial positioning groove is communicated with the inside of the concave structure, and the other end of the radial positioning groove faces to the center of the datum plane of the tool main body.

Further, the radial positioning groove is intersected at the center of the datum plane of the tool main body, and the tail end of the radial guiding groove radially penetrates through the concave structure and is communicated with the side face of the tool main body.

The radial guide grooves intersecting with the center of the reference surface of the tool main body are formed in the reference surface of the tool main body, so that the sliding path of the positioning block is prolonged, the position adjustment range of the positioning block is increased, stepless adjustment of the positioning block can be realized under the guidance of the radial guide grooves, and the positioning block is further suitable for positioning and mounting annular workpieces with different sizes.

Further, the concave structure is an annular groove, and the matching cavity is an annular cavity formed in the annular groove; during positioning and mounting, the protruding structure on the end face of the annular workpiece to be measured is matched inside the annular groove.

Further, the concave structure is a circular groove, and the matching cavity is a circular cavity formed in the circular groove; during positioning and mounting, the protruding structure on the end face of the annular workpiece to be measured is matched inside the circular groove.

The circular groove can further increase the matching range and space of the protruding structures on the end face to be measured of the annular workpiece, not only can be matched with the annular protruding structures, but also can be matched with protruding structures of other shapes so as to adapt to the positioning and mounting of the annular workpiece with the protruding structures of different shapes on the end face to be measured, and therefore the compatibility and the application range of the tool are increased.

In summary, compared with the prior art, the utility model has the following beneficial effects: set up location structure and concave structure on the reference surface of frock main part, location structure can install annular work piece radial location on the reference surface of frock main part to cooperate with the protruding structure on the annular work piece terminal surface that awaits measuring through concave structure, make the terminal surface that awaits measuring of annular work piece after the radial location installation can laminate with the reference surface of frock main part, can carry out terminal surface roughness measurement to annular work piece through single feeler lever, thereby improve measuring efficiency and accuracy.

Drawings

The utility model will be described in further detail with reference to the accompanying drawings and specific embodiments

FIG. 1 is a schematic view of a tooling structure when a positioning block is at a first position in the first embodiment;

FIG. 2 is a schematic view of a tooling structure when the positioning block is in the second position in the first embodiment;

fig. 3 is a schematic diagram of a tooling structure when the positioning block is in the first position in the second embodiment;

fig. 4 is a schematic diagram of a tooling structure when the positioning block is in the second position in the second embodiment;

FIG. 5 is a diagram showing the assembly and disassembly of the second embodiment;

FIG. 6 is a schematic diagram of a collar structure;

FIG. 7 is a schematic view of a bottom ring structure;

fig. 8 is a schematic diagram of a tooling structure when the positioning block is in the second position in the third embodiment;

Fig. 9 is a schematic diagram of a tooling structure when the positioning block is in the first position in the fourth embodiment;

fig. 10 is a schematic diagram of a tooling structure when the positioning block is in the second position in the fourth embodiment;

Fig. 11 is a diagram showing the assembly and disassembly of the fourth embodiment.

The marks on the accompanying drawings: 1-frock main part, 1 a-first side, 1 b-second side, 1 c-third side, 1d-, 2-annular groove, 2 a-first groove lateral wall, 2 b-groove diapire, 2 c-second groove lateral wall, 3-locating piece, 3 a-elongated through-hole, 3 b-connecting portion, 3 c-screw through-hole, 4-radial constant head tank, 4 a-first groove portion, 4 b-second groove portion, 5-pedestal, 6 a-annular bead, 7-circular recess.

Detailed Description

The following description of specific embodiments of the utility model is provided to aid in understanding the utility model and is not to be construed as limiting the utility model, as illustrated in the accompanying drawings. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

Referring to fig. 1 and 2, the utility model relates to a tool for measuring flatness of an end face of an annular workpiece, the tool comprises a tool body 1, wherein the tool body 1 is provided with a reference surface; be provided with location structure and concave structure on the reference surface of frock main part 1, location structure is used for installing annular work piece location on the reference surface of frock main part 1 to make the protruding structure on the annular work piece terminal surface that awaits measuring cooperate with the concave structure on the reference surface of frock main part 1, annular work piece's terminal surface that awaits measuring is laminated mutually with the reference surface of frock main part 1.

Specifically, the tooling main body 1 is of a rectangular plate-shaped structure and is made of light materials, such as aluminum alloy, and compared with the tooling main body 1 made of marble in the prior art, the tooling main body 1 in the embodiment has light overall weight, can be conveniently carried and transferred to a production workshop by production personnel, can timely measure the flatness of an annular workpiece, and can also be of a circular plate-shaped structure according to actual needs; the tool main body 1 is provided with a top surface, a bottom surface and four end-to-end side surfaces, wherein the top surface of the tool main body 1 is a straight surface and is used as a reference surface for measuring the flatness of the end surface of the annular workpiece; during measurement, the annular workpiece is mounted on the top surface of the tool main body 1, after being positioned by the positioning structure, the protruding structure on the end surface to be measured of the annular workpiece is matched in the concave structure on the reference surface of the tool main body 1, the end surface to be measured of the annular workpiece is attached to the reference surface of the tool main body 1, a clearance formed between the end surface to be measured and the reference surface is plugged by using a feeler gauge, and the flatness of the end surface to be measured of the annular workpiece is obtained according to the thickness of the feeler gauge so that production staff can judge the qualification condition of products.

The concave structure on the datum plane of the tool main body 1 is an annular groove 2, and the annular groove 2 is positioned at the center of the datum plane of the tool main body 1; the annular groove 2 is provided with a first groove side wall 2a, a groove bottom wall 2b and a second groove side wall 2c which are sequentially connected, the first groove side wall 2a is positioned at one side of the groove bottom wall 2b, which is close to the center of the tool main body 1, the second groove side wall 2c is positioned at one side of the groove bottom wall 2b, which is far away from the center of the tool main body 1, the first groove side wall 2a, the groove bottom wall 2b and the second groove side wall 2c enclose an annular cavity, and a notch is formed at the top of the annular groove 2; the groove width of the annular groove 2 is larger than the transverse length of the protruding structure on the end face to be measured of the annular workpiece, and the groove depth of the annular groove 2 is larger than the longitudinal length of the protruding structure on the end face to be measured of the annular workpiece, so that the protruding structure on the end face to be measured of the annular workpiece can be matched in the annular cavity of the annular groove 2 when the annular workpiece is positioned and installed.

The positioning structure on the reference surface of the tool main body 1 comprises at least three positioning blocks 3, the positioning blocks 3 are distributed along the circumferential direction of the annular groove 2, and at least three positioning points with fixed positions are formed on the reference surface of the tool main body 1 so as to limit the installation position of the annular workpiece, so that production personnel can rapidly position and install the annular workpiece on the reference surface of the tool main body 1, and the measurement efficiency is improved.

In the embodiment, four positioning blocks 3 are arranged, and the four positioning blocks 3 are adjustably arranged on a reference surface of the tool main body 1 through bolt positions; when the annular workpiece is installed, the four positioning blocks 3 can be attached to the inner side wall of the annular workpiece so as to limit the installation position of the annular workpiece; it should be noted that, in this embodiment, the positioning block 3 may also be attached to the outer side wall of the annular workpiece, so that positioning and mounting of the annular workpiece can also be achieved, but since the feeler needs to be plugged into the gap formed between the end surface to be measured and the reference surface from the outer side of the annular workpiece when flatness measurement is performed, the positioning block 3 is located at the outer side of the annular workpiece to block plugging of the feeler, so that the positioning block 3 is preferably attached to the inner side wall of the annular workpiece to ensure measurement accuracy.

Because when flatness measurement is performed, the protruding structure on the end face of the annular workpiece to be measured needs to be matched in the annular cavity of the annular groove 2, and the annular workpiece is limited to move along the reference surface, and the axial freedom degree of the annular workpiece does not need to be limited, so that production personnel can take and place the annular workpiece in the axial direction, positioning and mounting of the annular workpiece in the embodiment specifically means radial positioning and mounting of the annular workpiece, and non-radial positioning and mounting of the annular workpiece are not needed.

The thickness of the positioning block 3 is larger than that of the annular workpiece, so that the annular workpiece is prevented from moving on the tool main body 1 away from the positioning block 3 during measurement to influence measurement; the end face of one end of the positioning block 3, which is attached to the inner side wall of the annular workpiece, is used as a positioning end, and the end face of the positioning end of the positioning block 3 is an arc surface so as to enlarge the contact area with the inner side wall of the annular workpiece and reduce stress concentration, thereby avoiding the indentation of the positioning block 3 on the inner side wall of the annular workpiece.

Two bolt holes are formed in the mounting position of each positioning block 3 on the reference surface of the tool main body 1, the bolt holes are distributed at intervals along the radial direction of the annular groove 2, each positioning block 3 is provided with a long through hole 3a parallel to the length direction of the positioning block, and a preset moving track formed by the long through holes 3a on the positioning block 3 is in a straight shape; the bolt penetrates into the long through hole 3a on the positioning block 3 from the top of the positioning block 3 and is in threaded connection with the bolt hole on the reference surface of the tool main body 1 after penetrating out from the top of the positioning block 3 so as to fasten the positioning block 3 on the reference surface of the tool main body 1, so that the positioning block 3 can radially position the annular workpiece.

In specific implementation, the positioning block 3 is of a rectangular block structure, and one end of the positioning block 3 facing the annular groove 2 is a positioning end; loosening the bolt in a screwing mode, driving the positioning block 3 to move between a first position and a second position so as to change the positioning and mounting position of the annular workpiece, and recovering the locking bolt after the positioning and mounting position is adjusted; the first position is a position where one bolt is matched with one end of the annular long through hole 3a facing away from the annular groove, and the second position is a position where the other bolt is matched with one end of the annular long through hole 3a facing towards the annular groove.

When the positioning block 3 is at the first position, the positioning end of the positioning block 3 moves to the top of the annular groove 2, an annular workpiece with a flat end surface to be measured is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, and the first position is the maximum adjustment position of the positioning block 3.

When the positioning block 3 is in the second position, the positioning end of the positioning block 3 moves out of the top of the annular groove 2, the annular workpiece with the end face to be detected with the protruding structure is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, the protruding structure on the end face to be detected of the annular workpiece is matched in the annular cavity of the annular groove 2, and the second position is the minimum adjusting position of the positioning block 3.

Example two

Referring to fig. 3 to 5, the difference between the second embodiment and the first embodiment is that the positioning structure on the reference surface of the tool body 1 in this embodiment further includes at least three radial positioning grooves 4, and the radial positioning grooves 4 are arranged along the circumferential direction of the annular groove 2; each radial positioning groove 4 is internally provided with a positioning block 3, the positioning blocks 3 can slide along the radial positioning grooves 4, the radial positioning grooves 4 are used for guiding the positioning blocks 3 to move according to a preset track so as to change the positioning and mounting positions of the annular workpieces, and after the positioning and mounting positions are adjusted, at least three positioning points are formed on the datum plane of the tool main body 1 so as to position and mount the annular workpieces with different sizes.

Specifically, in this embodiment, four radial positioning grooves 4 are provided, each radial positioning groove 4 is an elongated groove body, an opening is formed at the top of each radial positioning groove 4, one end of each radial positioning groove 4 in the length direction is communicated with an annular cavity of the annular groove 2, the other end of each radial positioning groove 4 in the length direction faces the center of the reference surface of the tool main body 1, and a preset moving track formed by each radial positioning groove 4 is in a straight shape; the inside guide cavity that holds locating piece 3 that forms of radial constant head tank 4, locating piece 3 are installed in the inside guide cavity of radial constant head tank 4 through the open-top of radial constant head tank 4, and can follow the guide cavity and slide, and locating piece 3 adjusts the position of self on frock main part 1 reference surface with the mode of sliding to the location installation needs of the cyclic annular work piece that has different sizes.

The bottom of the radial positioning groove 4 is provided with a bolt hole, and the positioning block 3 is provided with a long through hole 3a parallel to the length direction of the positioning block 3; the bolt penetrates into the long through hole 3a on the positioning block 3 from the top of the positioning block 3, and is in threaded connection with the bolt hole on the bottom of the radial positioning groove 4 after penetrating out from the bottom of the positioning block 3, so as to fasten the positioning block 3 after position adjustment in the radial positioning groove 4.

It should be noted that, the length of the radial positioning groove 4 is greater than the length of the positioning block 3, so that the positioning block 3 can slide in the guiding cavity inside the radial positioning groove 4; the width of the radial positioning groove 4 is larger than that of the positioning block 3, so that gaps are formed between two ends of the positioning block 3 in the width direction and groove walls on two sides of the radial positioning groove 4, and the positioning block 3 can smoothly slide in a guide cavity inside the radial positioning groove 4 during position adjustment; the top of the positioning block 3 extends out of the top opening of the radial positioning groove 4 to form an extension part, and the extension part of the positioning block 3 is higher than the top end of the annular workpiece after positioning and installation, so that the annular workpiece is prevented from moving on the tool main body 1 away from the positioning block 3 during measurement to influence measurement.

In specific implementation, the positioning block 3 is of a rectangular block structure, and one end of the positioning block 3 facing the annular groove 2 is a positioning end; loosening the bolt in a screwing mode, driving the positioning block 3 to slide between a first position and a second position along the radial positioning groove 4 so as to change the positioning and mounting position of the annular workpiece, and recovering the locking bolt after the positioning and mounting position is adjusted; the first position is one end of the radial positioning groove 4 communicated with the annular cavity of the annular groove 2, and the second position is one end of the radial positioning groove 4 facing the center of the datum plane of the tool main body 1.

When the positioning block 3 is positioned at the first position, the positioning end of the positioning block 3 enters the annular groove 2, the annular cavity of the annular groove 2 is divided into four cavity sections, an annular workpiece with a flat end face to be measured is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, and the first position is the maximum adjusting position of the positioning block 3.

When the positioning block 3 is in the second position, the positioning end of the positioning block 3 moves out of the annular groove 2, the annular workpiece with the end face to be detected with the protruding structure is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, the protruding structure on the end face to be detected of the annular workpiece is matched in the annular cavity of the annular groove 2, and the second position is the minimum adjustment position of the positioning block 3.

The end face of the positioning end of the positioning block 3 is an arc surface so as to enlarge the contact area with the inner side wall of the annular workpiece and reduce stress concentration, thereby avoiding the indentation of the positioning block 3 on the inner side wall of the annular workpiece.

Referring to fig. 6 and 7, in the present embodiment, an annular workpiece with a flat end surface to be measured is a shaft collar 5 of a bearing, an annular workpiece with a convex structure end surface to be measured is a bottom collar 6 of the bearing, the inner diameter of the shaft collar 5 is larger than that of the bottom collar 6, the convex structure on the end surface to be measured of the bottom collar 6 is an annular convex rib 6a protruding from the end surface to be measured, and the annular convex rib 6a is used for connecting the bottom collar 6 with the shaft collar 5; therefore, in the embodiment, the positions of the positioning blocks 3 are adjusted in a sliding manner, so that the shaft collar 5 and the bottom collar 6 can be respectively positioned and installed on the same tool, flatness measurement can be conveniently carried out on the end faces to be measured of the shaft collar 5 and the bottom collar 6 by production personnel, and the measurement efficiency and the application range are improved; and the positioning block 3 slides along the radial positioning groove 4, so that the position adjustment accuracy of the positioning block is improved, the length of the positioning block is reduced, the sliding space of the positioning block in the positioning groove is further increased, and the moving stroke of the positioning block is correspondingly increased.

Example III

Referring to fig. 8, in comparison with the first embodiment, the third embodiment is different in that the positioning structure on the reference surface of the tool body 1 in this embodiment includes at least four radial positioning grooves 4, and the radial positioning grooves 4 are arranged along the circumferential direction of the annular groove 2 and intersect at the center of the reference surface of the tool body 1; each radial positioning groove 4 is internally provided with a positioning block 3, each positioning block 3 can slide along the radial positioning groove 4, the radial positioning groove 4 is used for guiding the positioning block 3 to change the positioning and mounting positions of the annular workpieces according to a preset moving track, and at least four positioning points with adjustable positions are formed on the reference surface of the tool main body 1 so as to position and mount the mounting positions of the annular workpieces with different sizes.

Specifically, the four side surfaces of the tool main body 1 are a first side surface 1a, a second side surface 1b, a third side surface 1c and a fourth side surface 1d which are sequentially connected, the first side surface 1a and the third side surface 1c are opposite and have the same length, and the second side surface 1b and the fourth side surface 1d are opposite and have the same length; in the embodiment, four radial positioning grooves 4 are provided, namely a first radial guiding groove, a second radial guiding groove, a third radial guiding groove and a fourth radial guiding groove, wherein the first radial guiding groove and the third radial guiding groove are opposite and are communicated with each other at the center of a reference surface of the tool main body 1 to form a first through long groove; the second radial guide groove and the fourth radial guide groove are opposite and are communicated with each other at the center of the datum plane of the tool main body 1 to form a second through long groove body, and the two through long groove bodies are crossed in a cross shape and are communicated with each other; the top of the four radial positioning grooves 4 are provided with openings; the tail end of the first radial guide groove radially penetrates through the annular groove 2 and is communicated with the first side face 1a of the tool main body 1; the tail end of the second radial guide groove radially penetrates through the annular groove 2 and is communicated with the second side surface 1b of the tool main body 1; the tail end of the third radial guide groove radially penetrates through the annular groove 2 and is communicated with a third side surface 1c of the tool main body 1; the tail end of the fourth radial guide groove radially penetrates through the annular groove 2 and is respectively communicated with the fourth side surface 1d of the tool main body 1; the four sides of the tool main body 1 are correspondingly provided with communication ports so that the positioning block 3 enters the radial positioning groove 4 from the communication ports, a guide cavity for accommodating the positioning block 3 is formed inside the radial positioning groove 4, the positioning block 3 can slide in the guide cavity inside the radial positioning groove 4, and the positioning block 3 adjusts the position of the positioning block on the reference surface of the tool main body 1 in a sliding manner so as to adapt to the positioning and mounting requirements of annular workpieces with different sizes.

The two radial positioning grooves 4 are stepped groove bodies with the cross sections in a convex shape, each radial positioning groove 4 comprises a first groove part 4a and a second groove part 4b which are communicated with each other, the first groove part 4a is positioned at the top end of the second groove part 4b, the width of the first groove part 4a is smaller than that of the second groove part 4b, a step is formed at the communication part of the first groove part 4a and the second groove part 4b, and an opening is formed at the top end of the first groove part 4 a; the positioning block 3 is of a rectangular block structure, the bottom end of the positioning block 3 is provided with a connecting part 3b, and two ends of the connecting part 3b of the positioning block 3 in the width direction protrude out of the side wall of the positioning block 3; when the positioning block 3 enters the radial positioning groove 4, the connecting part 3b of the positioning block 3 is matched with the second groove part 4b of the radial positioning groove 4, the top end of the positioning block 3 is matched with the first groove part 4a of the radial positioning groove 4, an extending part is formed by extending out of the radial positioning groove 4 from the top end opening of the first groove part 4a, and the extending part of the positioning block 3 is higher than the top end of the annular workpiece after positioning and installation, so that the annular workpiece is prevented from moving on the tool main body 1 to influence the measurement when being separated from the positioning block 3 during the measurement; the width of the first groove part 4a of the radial positioning groove 4 is larger than that of the positioning block 3, and the width of the second groove part 4b of the radial positioning groove 4 is larger than that of the connecting part 3b of the positioning block 3, so that gaps are formed between two ends of the positioning block 3 in the width direction and groove walls on two sides of the radial positioning groove 4, and the positioning block 3 can smoothly slide in a guide cavity inside the radial positioning groove 4 during position adjustment.

The positioning block 3 is provided with a threaded through hole 3c, a bolt is connected in the threaded through hole 3c on the positioning block 3 from the top of the positioning block 3 in a threaded manner, and is abutted to the bottom of the radial positioning groove 4 after penetrating out from the bottom of the positioning block 3, and the step of the radial positioning groove 4 is in stop fit with the connecting part 3b of the positioning block 3 so as to fasten the positioning block 3 after position adjustment in the radial positioning groove 4.

In specific implementation, one end of the positioning block 3 facing the annular groove 2 is a positioning end, a bolt is loosened in a screwing mode, the bottom end of the bolt is separated from the bottom of the radial positioning groove 4 to unlock the positioning block 3, the positioning block 3 is driven to slide between a first position and a second position along the radial positioning groove 4 so as to change the positioning and mounting position of the annular workpiece, and the positioning and mounting position is adjusted to recover and fasten the positioning block 3 through the bolt; the first position is the radial penetration position of the radial positioning groove 4 and the annular groove 2, and the second position is the center of the datum plane of the tool main body 1.

When the positioning block 3 is positioned at the first position, the positioning end of the positioning block 3 enters the annular groove 2, the annular cavity of the annular groove 2 is divided into four cavity sections, an annular workpiece with a flat end face to be measured is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, and the first position is the maximum adjusting position of the positioning block 3.

When the positioning block 3 is in the second position, the positioning end of the positioning block 3 moves out of the annular groove 2, the annular workpiece with the end face to be detected with the protruding structure is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, the protruding structure on the end face to be detected of the annular workpiece is matched in the annular cavity of the annular groove 2, and the second position is the minimum adjustment position of the positioning block 3.

In this embodiment, through at least three radial positioning grooves 4 intersecting at the center of the reference plane of the tool main body, the sliding path of the positioning block 3 is prolonged, the position adjustment range of the positioning block 3 is increased, and under the guidance of the radial positioning grooves 4, the positioning block 3 can slide between the first position and the second position to realize stepless adjustment, so that the positioning tool is further suitable for positioning and installing annular workpieces with different sizes.

Example IV

Referring to fig. 9 to 11, in comparison with the third embodiment, the difference is that the concave structure on the reference surface of the tool body 1 in the third embodiment is a circular groove 7, the circular groove 7 has an annular side wall and a bottom wall, the annular side wall and the bottom wall enclose a circular cavity, and when the annular workpiece is positioned and installed, the convex structure on the end surface to be measured of the annular workpiece can be matched in the circular cavity of the circular groove 7.

Specifically, the circular groove 7 is located at the center of the reference surface of the workpiece body in the present embodiment; the tail end of the first radial guide groove radially penetrates through the circular groove 7 and is communicated with the first side face 1a of the tool main body 1; the tail end of the second radial guide groove radially penetrates through the circular groove 7 and is communicated with the second side surface 1b of the tool main body 1; the tail end of the third radial guide groove radially penetrates through the circular groove 7 and is communicated with the third side surface 1c of the tool main body 1; the tail end of the fourth radial guiding groove radially penetrates through the circular groove 7 and is respectively communicated with the fourth side surface 1d of the tool main body 1; communication ports are correspondingly formed on four sides of the tool main body 1, and the positioning blocks 3 enter the radial positioning grooves 4 from the communication ports; the diameter of the circular groove 7 is larger than the inner diameter of the annular workpiece, and the groove depth of the circular groove 7 is larger than the longitudinal length of the protruding structure on the end face to be detected of the annular workpiece.

In specific implementation, one end of the positioning block 3 facing the circular groove 7 is a positioning end, a bolt is loosened in a screwing mode, the bottom end of the bolt is separated from the bottom of the radial positioning groove 4 to unlock the positioning block 3, the positioning block 3 is driven to slide between a first position and a second position along the radial positioning groove 4 so as to change the positioning and mounting position of the annular workpiece, and the positioning and mounting position is adjusted to recover and fasten the positioning block 3 through the bolt; the first position is the radial penetration position of the radial positioning groove 4 and the circular groove 7, and the second position is the center of the datum plane of the tool main body 1.

When the positioning block 3 is at a first position, an annular workpiece with a flat end face to be measured is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning ends of the positioning blocks 3 are attached to the inner side walls of the annular workpiece, and the first position is the maximum adjustment position of the positioning blocks 3.

When the positioning block 3 is at the second position, the annular workpiece with the end face to be detected with the protruding structure is positioned and installed on the reference surface of the tool main body 1 through the four positioning blocks 3, the positioning end of the positioning block 3 is attached to the inner side wall of the annular workpiece, the protruding structure on the end face to be detected of the annular workpiece is matched in the circular cavity of the circular groove 7, and the second position is the minimum adjusting position of the positioning block 3.

The circular groove 7 in this embodiment can further increase the fit range and space with the protruding structure on the end face to be measured of the annular workpiece, not only can fit the annular protruding structure, but also can fit the protruding structures of other shapes, so as to adapt to the positioning and mounting of the annular workpiece with the protruding structures of different shapes on the end face to be measured, thereby increasing the compatibility and application range of the tool.

The above-mentioned embodiments of the present utility model are not intended to limit the scope of the present utility model, and the embodiments of the present utility model are not limited thereto, and all kinds of modifications, substitutions or alterations made to the above-mentioned structures of the present utility model according to the above-mentioned general knowledge and conventional means of the art without departing from the basic technical ideas of the present utility model shall fall within the scope of the present utility model.

Claims (10)

1. The utility model provides a frock for cyclic annular work piece terminal surface roughness measurement, includes the frock main part, its characterized in that is provided with concave structure and location structure on the reference surface of frock main part, forms the cooperation cavity in concave structure's inside, and location structure is used for through the cooperation of cooperation cavity, radially limits the terminal surface that awaits measuring of cyclic annular work piece on the reference surface.

2. The tool for measuring the flatness of the end face of the annular workpiece according to claim 1, wherein the positioning structure comprises at least three positioning blocks, the positioning blocks are arranged along the circumferential direction of the concave structure, when the positioning and mounting are performed, the positioning ends of the positioning blocks are attached to the side wall of the annular workpiece, and the concave structure is located at the center of the datum plane of the tool main body and is matched with the convex structure on the end face to be measured of the annular workpiece.

3. The tool for measuring the flatness of the end face of an annular workpiece according to claim 2, wherein the positioning structure further comprises a guide passage, and the positioning block is movable along the guide passage along a predetermined trajectory with respect to the tool body to adjust the mounting position of the positioning block.

4. The tool for measuring the flatness of the end face of the annular workpiece according to claim 3, wherein each positioning block is connected to a reference surface of the tool main body through two bolt positions, and is provided with an elongated through hole for a bolt to pass through, and the elongated through hole is the guide channel; the positioning block is matched with the long through hole through the bolt and can move towards or back to the center of the datum plane on the datum plane of the tool main body.

5. A tool for measuring flatness of an end face of an annular workpiece according to claim 3, wherein the guide channel is a radial positioning groove formed in a reference surface of the tool body, the radial positioning grooves are arranged along a circumferential direction of the groove structure, a positioning block is slidably mounted in each radial positioning groove, and the positioning block can move towards or away from a center of the reference surface along the radial positioning groove.

6. The tool for measuring the flatness of the end surface of an annular workpiece according to claim 5, wherein the top of the positioning block extends out of the top of the radial positioning groove to form an extension part, and the extension part of the positioning block is higher than the top end of the annular workpiece after positioning and installation.

7. The tool for measuring the flatness of the end face of an annular workpiece according to claim 5, wherein one end of the radial positioning groove is communicated with the inside of the concave structure, and the other end of the radial positioning groove faces to the center of the datum plane of the tool body.

8. The tool for measuring the flatness of the end face of an annular workpiece according to claim 5, wherein the radial positioning groove intersects at the center of the reference surface of the tool body, and the end of the radial guiding groove radially penetrates through the recessed structure and communicates with the side surface of the tool body.

9. The tool for measuring the flatness of an end face of an annular workpiece according to any one of claims 1 to 8, wherein the recessed structure is an annular groove, and the mating cavity is an annular cavity formed inside the annular groove; during positioning and mounting, the protruding structure on the end face of the annular workpiece to be measured is matched inside the annular groove.

10. The tool for measuring the flatness of the end face of an annular workpiece according to any one of claims 1 to 8, wherein the concave structure is a circular groove, and the mating cavity is a circular cavity formed inside the circular groove; during positioning and mounting, the protruding structure on the end face of the annular workpiece to be measured is matched inside the circular groove.