CN211717343U - Pneumatic measuring device for aperture size and verticality - Google Patents
Pneumatic measuring device for aperture size and verticality Download PDFInfo
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- CN211717343U CN211717343U CN202020601689.4U CN202020601689U CN211717343U CN 211717343 U CN211717343 U CN 211717343U CN 202020601689 U CN202020601689 U CN 202020601689U CN 211717343 U CN211717343 U CN 211717343U
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Abstract
The utility model discloses an aperture size and straightness pneumatic measuring device that hangs down for be connected with the gas-electric electron post and measure, include: the measuring head is arranged on the bottom plate, the workbench and the measuring head, and a center hole is formed in the center of the workbench; the measuring head is perpendicular to the workbench, an inner diameter measuring nozzle and a verticality measuring nozzle are arranged in the measuring head, the inner diameter measuring nozzle and the verticality measuring nozzle respectively comprise two gas paths arranged along the radial direction of the measuring head, the two gas paths of the inner diameter measuring nozzle are positioned at the same height, and the two gas paths for verticality measurement are higher and lower; the joint is communicated with the inner diameter measuring nozzle and the verticality measuring nozzle. The pneumatic measurement mode is adopted, so that the workpiece is not easy to scratch, the measurement efficiency is high, the accuracy is high, and the inner diameter and the verticality are measured at the same time.
Description
Technical Field
The utility model belongs to the technical field of the machining measuring tool, in particular to aperture size and straightness pneumatic measuring device that hangs down.
Background
The connecting rod is used as a common mechanical part, and the inner diameter size and the verticality of a small-end hole of the connecting rod are important parameters for evaluating the machining precision of the connecting rod. The existing product measurement mode is as follows: for inner diameter size measurement: the contact strip gauge measures the inside diameter dimension. And obtaining an approximate actual value of the inner diameter of the small-head hole by comparing and measuring with the standard piece detection value. The disadvantages are that: if the hardness of the surface of the workpiece is too low in contact measurement, the workpiece is easily scratched. For perpendicularity measurements: selecting a core rod with proper size in a special grouping core rod to be inserted into a connecting rod small end hole, positioning a core rod and connecting rod assembly by using a deflection detector, measuring the end surface of a connecting rod by using a magnetic force gauge stand to clamp a dial indicator, rotating the core rod to measure the jump of the end surface of the connecting rod relative to the small end hole, approximately equating the value to the perpendicularity of the end surface of the connecting rod relative to the small end hole, and finally converting the perpendicularity of the small end hole relative to the end surface of the connecting rod by manual calculation. The disadvantages are that: the operation is complicated, the requirement on the proficiency of detection personnel is high, the efficiency is low, and the accuracy is not high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned prior art, provide a can simultaneous measurement aperture size beat and hang down straightness's pneumatic measuring device.
For solving the above technical problem, the utility model discloses a technical scheme is: the utility model provides an aperture size and straightness pneumatic measuring device that hangs down for be connected with the pneumo-electric electron post and measure, include:
the bottom plate is provided with a joint for connecting the gas-electricity electronic column;
the workbench is rotatably connected with the bottom plate, and a center hole is formed in the center of the workbench;
the measuring head is perpendicular to the workbench and is in clearance fit with the central hole, an inner diameter measuring nozzle and a verticality measuring nozzle are arranged in the measuring head, the inner diameter measuring nozzle and the verticality measuring nozzle respectively comprise two gas paths arranged along the radial direction of the measuring head, the two gas paths of the inner diameter measuring nozzle are positioned at the same height, and the two gas paths for verticality measurement are higher and lower;
the joint is communicated with the inner diameter measuring nozzle and the perpendicularity measuring nozzle.
The workbench is in a ring shape, the upper surface of the workbench is provided with a plurality of mutually parallel chip grooves, and a plurality of through holes which are arranged in a circumferential array are arranged at positions close to the central hole.
The workbench is provided with at least one positioning pin vertical to the workbench.
The two gas circuits of the inner diameter measuring nozzle are positioned on the same straight line, and the two gas circuits of the verticality measuring nozzle are positioned in the same plane. The inner diameter measuring nozzles are arranged in two numbers, and the two inner diameter measuring nozzles are located at different heights.
The inner diameter measuring nozzle is perpendicular to the verticality measuring nozzle.
And the upper end of the measuring head is provided with a guide cap.
The upper end face of the bottom plate is provided with three placing seats for placing standard parts.
And an outer cylindrical surface of the measuring head is provided with a directional groove parallel to the axial direction of the measuring head.
The utility model has the advantages that: the pneumatic measuring device for the aperture size and the verticality takes the end face of the connecting rod as a positioning reference, the inner diameter measuring nozzle is designed to measure the aperture size of the small end hole of the connecting rod, and the gas sprayed out of the same gas path has different pressure feedback under the condition of different sizes. This differential pressure feedback signal is correlated with the actual differential value of the standard. Pressure difference: size value variation ≈ 1: 1, and then reducing the difference value of the detected workpiece pressure and the standard part pressure into the size, thereby obtaining the size of the actual workpiece. The perpendicularity measuring nozzle measures the perpendicularity of the small end hole of the connecting rod on the end face of the connecting rod, the small end hole of the connecting rod is measured by rotating the workpiece for 360 degrees, and two actual values of the inner diameters of the sections are measured by comparing with the detection values of the upper limit standard component and the lower limit standard component, so that the perpendicularity of the end face of the connecting rod is obtained. The pneumatic measurement mode is adopted, so that the workpiece is not easy to scratch, the measurement efficiency is high, the accuracy is high, and the inner diameter and the verticality are measured at the same time.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a front view of the present invention;
fig. 3 is a schematic view of the structure of the probe.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
As shown in fig. 1 to 3, a pneumatic measuring device for measuring aperture size and verticality is used for being connected with a gas-electric electron column for measurement, and comprises: bottom plate 1, workstation 2, gauge head 3.
The bottom plate 1 is provided with a joint 11 for connecting with a gas-electricity electron column; the joints 11 are three inverted cone sealing joints 11 for connecting air pipes. The three ports at the bottom of the measuring head 3 are communicated with the three joints 11 on the bottom plate 1 by air pipes. The upper end surface of the bottom plate 1 is provided with three placing seats 12 for placing the standard components 4. The upper and lower limit standard parts 4 are the size reference measured by the gauge. The pneumoelectric electron beam meter is a display part of the checking fixture.
The workbench 2 is rotatably connected with the bottom plate 1, and a central hole 21 is formed in the center of the workbench 2; the workbench 2 is annular, the upper surface of the workbench is provided with a plurality of mutually parallel chip grooves 24, and 8 through holes 23 which are arranged in a circumferential array are arranged at the position close to the central hole 21. At least one positioning pin 22 perpendicular to the worktable 2 is arranged on the worktable. The central 8 through holes 23 function: sweeping the dirt; the quenching process of the worktable 2 can be utilized as quenching holes and hoisting holes. The positioning pins 22 serve to prevent the workpiece from moving relative to the table 2.
The measuring head 3 is perpendicular to the worktable 2 and is in clearance fit with the central hole 21. As shown in fig. 3, an inner diameter measuring nozzle 31 and a perpendicularity measuring nozzle 32 are arranged in the measuring head 3, each of the inner diameter measuring nozzle 31 and the perpendicularity measuring nozzle 32 includes two gas paths 301 arranged along the radial direction of the measuring head 3, wherein the two gas paths 301 of the inner diameter measuring nozzle 31 are located at the same height, and the two gas paths 301 for perpendicularity measurement are higher and lower; the two air passages 301 of the inner diameter measuring nozzle 31 are located on the same straight line, and the two air passages 301 of the verticality measuring nozzle 32 are located on the same plane. The joint 11 communicates with the inner diameter measuring nozzle 31 and the perpendicularity measuring nozzle 32.
The inner diameter measuring nozzle 31 is provided in two, and the two inner diameter measuring nozzles 31 are located at different heights. The inner diameter measuring nozzle 31 is perpendicular to the perpendicularity measuring nozzle 32. The upper end of the measuring head 3 is provided with a guide cap 33. The outer cylindrical surface of the measuring head 3 is provided with an orientation groove 34 parallel to the axial direction thereof.
The working principle is as follows: the pneumatic measuring device for the aperture size and the verticality takes the end face of the connecting rod as a positioning reference, the inner diameter measuring nozzle 31 is designed to measure the aperture size of the small end hole of the connecting rod, and the same gas ejected by the gas path 301 has different pressure feedback under the condition of different sizes. This pressure difference feedback signal is correlated with the actual difference of the standard 4. Pressure difference: size value variation ≈ 1: 1, and then reducing the difference between the detected workpiece pressure and the standard part 4 pressure to the size, thereby obtaining the size of the actual workpiece. The perpendicularity measuring nozzle 32 measures the perpendicularity of the connecting rod small end hole on the connecting rod end face, the connecting rod small end hole is obtained through 360-degree measurement of the rotating workpiece, two section inner diameter actual values are obtained through comparison and measurement with the calibration values of the upper limit standard component and the lower limit standard component 4, and then the perpendicularity of the connecting rod end face is obtained.
A measurement step:
1. connecting the gas source and the power supply of the gas-electric electron column, and connecting the measuring head 3, the joint 11 and the gas-electric electron column;
2. respectively sleeving the upper and lower limit standard parts 4 on the measuring head 3 and completing the calibration of the measuring instrument on the pneumoelectric electron column; and during calibration, the rotation is not needed, and the direction calibration is fixed. The standard component 4 is marked with the verification direction of the standard component 4, and the actual value of the standard component 4 marked on the standard component 4 is the verification value according to the direction. The reason is that if the alignment is otherwise oriented there may be a deviation of around 0.0005mm, the standard 4 itself may have a roundness of 0.0005 mm. The maximum and minimum difference of actual values in different directions can be up to 0.0005 mm. Calibrating according to the calibrated calibration direction to eliminate the deviation;
3. sleeving a small end hole of a connecting rod to be measured into the measuring head 3 and rotating 360 degrees along with the workbench 2, and directly displaying the measurement results of the inner diameter and the verticality of the gas-electric electron column; the electron column is provided with a measurement option, so that the measurement result can be displayed in real time, the peak value can be kept, and the MAX value or the MIN value can be selected. For example, the way perpendicularity is measured is in peak hold mode; two paths of the inner diameter are displayed in real time;
4. after the detection is finished, closing the air source and the power supply;
5. the gauge is applied to oiling protection treatment of the measuring head 3 and the standard part 4 when not used.
The pneumatic measurement of the aperture size and the verticality does not contact with the workpiece in a pneumatic measurement mode, so that the workpiece is not easy to scratch, and the measurement efficiency and the accuracy are high.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, but rather is described in the embodiments and descriptions herein to illustrate the principles of the invention and that various changes and modifications may be made without departing from the spirit and scope of the invention, all of which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "center", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the scope of the present invention.
Claims (9)
1. The utility model provides an aperture size and straightness pneumatic measuring device that hangs down for be connected with the pneumo-electric electron post and measure, its characterized in that includes:
the bottom plate is provided with a joint for connecting the gas-electricity electronic column;
the workbench is rotatably connected with the bottom plate, and a center hole is formed in the center of the workbench;
the measuring head is perpendicular to the workbench and is in clearance fit with the central hole, an inner diameter measuring nozzle and a verticality measuring nozzle are arranged in the measuring head, the inner diameter measuring nozzle and the verticality measuring nozzle respectively comprise two gas paths arranged along the radial direction of the measuring head, the two gas paths of the inner diameter measuring nozzle are positioned at the same height, and the two gas paths for verticality measurement are higher and lower;
the joint is communicated with the inner diameter measuring nozzle and the perpendicularity measuring nozzle.
2. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: the workbench is in a ring shape, the upper surface of the workbench is provided with a plurality of mutually parallel chip grooves, and a plurality of through holes which are arranged in a circumferential array are arranged at positions close to the central hole.
3. The pneumatic measurement device for the pore size and the verticality according to claim 2, characterized in that: the workbench is provided with at least one positioning pin vertical to the workbench.
4. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: the two gas circuits of the inner diameter measuring nozzle are positioned on the same straight line, and the two gas circuits of the verticality measuring nozzle are positioned in the same plane.
5. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: the inner diameter measuring nozzles are arranged in two numbers, and the two inner diameter measuring nozzles are located at different heights.
6. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: the inner diameter measuring nozzle is perpendicular to the verticality measuring nozzle.
7. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: and the upper end of the measuring head is provided with a guide cap.
8. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: the upper end face of the bottom plate is provided with three placing seats for placing standard parts.
9. The pneumatic measurement device for the pore size and the verticality according to claim 1, characterized in that: and an outer cylindrical surface of the measuring head is provided with a directional groove parallel to the axial direction of the measuring head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020601689.4U CN211717343U (en) | 2020-04-21 | 2020-04-21 | Pneumatic measuring device for aperture size and verticality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020601689.4U CN211717343U (en) | 2020-04-21 | 2020-04-21 | Pneumatic measuring device for aperture size and verticality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211717343U true CN211717343U (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020601689.4U Active CN211717343U (en) | 2020-04-21 | 2020-04-21 | Pneumatic measuring device for aperture size and verticality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211717343U (en) |
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2020
- 2020-04-21 CN CN202020601689.4U patent/CN211717343U/en active Active
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