CN213238679U - Position measuring device for screw polish rod axis - Google Patents
Position measuring device for screw polish rod axis Download PDFInfo
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- CN213238679U CN213238679U CN202022271648.6U CN202022271648U CN213238679U CN 213238679 U CN213238679 U CN 213238679U CN 202022271648 U CN202022271648 U CN 202022271648U CN 213238679 U CN213238679 U CN 213238679U
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Abstract
The utility model provides a position degree measuring device in screw polished rod axle center, measuring device includes measuring spindle (1), base (2) and percentage table (3), and install on base (2) measuring spindle (1), and percentage table (3) are installed on measuring spindle (1), and measuring spindle (1), base (2) and percentage table (3) are located the coplanar. Position degree measuring device in screw polished rod axle center simple structure, the simple operation, it is little to measure to implement the degree of difficulty, can independently accomplish by alone, just the position degree measuring device in screw polished rod axle center can aim at each volume of measuring fast and measure the screw to accomplish the measurement one by one, very big improvement measurement check efficiency and measurement accuracy, solved the position degree measurement difficult problem in screw polished rod axle center, guaranteed heat exchanger product quality.
Description
Technical Field
The utility model relates to a measuring device, in particular to use other than screw thread as benchmark to accurate measuring device of screw polished rod axle center position degree.
Background
The manhole sealing gasket screw is used for nuclear power products, the polished rod axis position degree of the manhole sealing gasket screw is related to the assembly of a product sealing gasket, if eccentricity exists, the mounting and positioning and sealing effects of the sealing gasket are affected, and the product quality of a heat exchanger is related. The measurement of the axial center position of a polished rod of the conventional screw is more the position of the polished rod and the position of a thread to be processed before the thread is processed, and the measurement is ensured by a machine tool after the thread is processed, so that direct measurement cannot be realized. The invention greatly improves the inspection efficiency, improves the measurement precision and solves the measurement problem of the polished rod axis position degree of the screw.
SUMMERY OF THE UTILITY MODEL
Based on the above technical background, in order to solve the above problems, the present inventors have made a sharp approach to design a device for measuring a position degree of an axis of a screw polish rod, the device comprising: the measuring shaft is arranged on the base, the dial indicator is arranged on the measuring shaft, and the measuring shaft, the base and the dial indicator are located on the same plane. The device for measuring the position degree of the axis of the screw polish rod has the advantages of simple structure, convenient use and small measurement implementation difficulty, can be independently completed by one person, can quickly align the screws to be measured, and can complete the measurement one by one, thereby greatly improving the measurement and inspection efficiency and the measurement precision, and solving the measurement problem of the position degree of the axis of the screw polish rod, thereby completing the invention.
The utility model discloses an aspect provides a position degree measuring device in screw polished rod axle center, the device include measuring spindle 1, base 2 and percentage table 3, measuring spindle 1 installs on base 2, and percentage table 3 installs on measuring spindle 1.
The measuring shaft 1 comprises a shaft end and a measuring end, wherein an external thread is arranged on the shaft end, and preferably, the measuring end and the shaft end are coaxial;
the base 2 is provided with a shaft hole and a measuring hole, and the dial indicator 3 is provided with a measuring rod.
The top end of the measuring rod of the dial indicator 3 is hemispherical.
An internal thread is arranged in the measuring hole of the base 2, and the rotation direction, the thread pitch, the nominal diameter and the thread type of the internal thread are matched with the thread of the screw to be measured.
The size of the measuring hole of the base 2 is M12-6H, and the length of the measuring hole of the base 2 is the same as that of the threaded part of the screw to be measured.
The diameter of the shaft end of the measuring shaft 1 is smaller than that of the shaft hole, and the diameter of the measuring end of the measuring shaft 1 is larger than that of the shaft hole.
The shaft end of the measuring shaft 1 is in small clearance fit with the shaft hole of the base 2;
the shaft end of the measuring shaft 1 penetrates through the shaft hole of the base 2 and is preferably screwed to the shaft end of the measuring shaft 1 through a hexagonal nut 6, and the measuring shaft 1 is vertically arranged on the base 2.
The axle shafts of the axle holes and the measuring holes are parallel, and the axle holes and the measuring holes are respectively vertical to the upper surface of the base 2;
a rod hole is arranged at the measuring end of the measuring shaft 1 and is vertical to the lower surface of the measuring shaft 1.
The rod hole is in small clearance fit with the measuring rod of the dial indicator 3;
the dial indicator 3 is vertically arranged on the measuring shaft 1 through a bolt 4 and a nut 5;
the central axis of the rod hole on the measuring shaft 1, the central axis of the shaft hole on the base 2 and the central axis of the measuring hole are positioned on the same plane.
The measuring rod of the dial indicator 3 and the measuring hole of the base 2 are both positioned below the measuring shaft 1.
A second aspect of the present invention provides a method for measuring a position degree measuring device of a screw polished rod axis, comprising the steps of:
The utility model provides a position degree measuring device in screw polished rod axle center and measuring method thereof has following advantage:
(1) the device for measuring the position degree of the axis of the screw polish rod is simple, convenient to use and operate, can be independently completed by one person, and has small measurement implementation difficulty;
(2) the device for measuring the position degree of the axis of the screw polish rod can quickly align the screws to be measured and finish measurement one by one, thereby greatly improving the measurement and inspection efficiency;
(3) the device for measuring the position degree of the axis of the screw polish rod of the utility model takes the external thread as the reference to measure the position degree of the axis of the screw polish rod, thereby effectively improving the measurement precision;
(4) position degree measuring device in screw polished rod axle center need not to calibrate this measuring device before measuring, shortened measuring time, effectively improved and measured the phase rate.
Drawings
Fig. 1 is a schematic view showing the overall structure of the device for measuring the location degree of the axis of the screw polish rod according to the present invention;
fig. 2 is a schematic view showing a process of measuring the position of the screw polish rod by using the external thread of the screw as a measuring reference by the position measuring device for the axis of the screw polish rod according to the present invention;
fig. 3 is a left side view showing the overall structure of the device for measuring the location degree of the axis of the screw polish rod according to the present invention;
FIG. 4 shows a schematic structural view of a measuring screw;
fig. 5 shows an installation diagram of the dial indicator of the present invention in the measuring device.
Description of the reference numerals
1-measuring the shaft;
2-a base;
3-dial indicator;
4-a bolt;
5-a nut;
6-hexagonal nut;
7-workpiece (screw).
Detailed Description
The present invention will be described in detail below, and features and advantages of the present invention will become more apparent and clear with the description.
The position degree of the screw polish rod axis refers to the allowable variation range of the actual position of the axis of the screw polish rod cylindrical surface relative to the theoretical position of the external thread pitch diameter axis, namely the allowable error range.
The utility model discloses an aspect lies in providing a measuring device of measuring screw polished rod axle center position degree with outer screw thread as the benchmark, as shown in fig. 1, this measuring device includes measuring spindle 1, base 2 and percentage table 3. The measuring shaft 1 is arranged on the base 2, and the dial indicator 3 is arranged on the measuring shaft 1.
According to the utility model discloses, measuring spindle 1 includes axle head and measuring end, is equipped with the external screw thread on the axle head, and the axle head is installed on base 2, and the measuring end is used for installing percentage table 3. Preferably, the measuring end and the shaft end are coaxial, and the design that the measuring end and the shaft end are coaxial can ensure the stability and the measuring precision of the whole device in the measuring process. More preferably, the diameter of the measuring end is larger than the diameter of the shaft end, and still more preferably, the measuring end is in the shape of a straight plate, and the shaft end is in the shape of a cylinder.
The utility model discloses in be equipped with shaft hole and measuring aperture on the base 2, the shaft hole is used for installing measuring spindle 1, and the measuring aperture inserts the screw for the measurement of screw position degree, as shown in fig. 2.
The dial indicator 3 is provided with a measuring rod, the dial indicator 3 is arranged on the measuring shaft 1 through the measuring rod, and preferably, the top end part of the measuring rod of the dial indicator 3 is hemispherical, as shown in figure 1. In the measurement process, the polished rod surface contact of measuring stick top portion and the screw that awaits measuring plays the fulcrum effect, consequently the utility model discloses in with measuring stick top portion design for hemispherical, can effectively avoid causing the damage to screw polished rod position, reduce the mechanical wear to 3 top portions of percentage table simultaneously.
According to the utility model relates to a preferred embodiment, be equipped with the internal thread in 2 measuring holes of base, this internal screw thread precision, revolve to, the pitch, the nominal diameter, the thread type and the screw thread phase-match of the screw that awaits measuring, the volume of awaiting measuring screw can be in this screw hole, and this internal screw thread setting can be guaranteed in the measurement process, measuring device can aim at the polished rod of the volume of awaiting measuring screw fast, preferably, 2 measuring holes of base and the screw thread portion of the screw that awaits measuring are little clearance fit, the axis of 2 measuring holes of base when little clearance fit can be ensured to measure is coaxial with the axis of the screw that is surveyed, not only can improve measurement accuracy, can also improve measurement of efficiency.
According to a further preferred embodiment of the present invention, in order to quickly align the polished rod of the screw to be measured and perform the position measurement one by one, the size of the measuring hole of the base 2 is M12-6H (the thread size of the workpiece screw is M12-6 g).
Preferably, base 2 measuring aperture length is the same with the threaded portion length of the volume of awaiting measuring screw, finds through the experiment that measuring aperture length when base 2 is the same with the length of the volume of awaiting measuring screw threaded portion, the device measurement screw polished rod position degree's measurement accuracy is higher.
The utility model discloses in, the axle head diameter of measuring spindle 1 is less than the diameter in shaft hole, and the diameter of measuring spindle 1 measuring terminal is greater than the diameter in shaft hole, as shown in fig. 1, can guarantee to measure the firm installation on base 2 of spindle 1. Preferably, the axle head of measuring spindle 1 is little clearance fit with the shaft hole of base 2, can effectively avoid measuring spindle 1 to install the back on base 2, and relative displacement about measuring spindle 1 and base 2 appear to effectively guarantee measurement accuracy.
The internal thread in the hexagonal nut 6 is matched with the accuracy, the turning direction, the thread pitch, the nominal diameter and the thread type of the external thread at the shaft end of the measuring shaft 1, the shaft end of the measuring shaft 1 passes through the shaft hole on the base 2 and is preferably screwed at the shaft end of the measuring shaft 1 through the hexagonal nut 6, so that the measuring shaft 1 is vertically installed on the base 2, as shown in fig. 1 and 3.
According to the utility model discloses further preferred embodiment, the axis of shaft hole and measuring aperture is parallel, preferably, shaft hole and measuring aperture are perpendicular to 2 upper surfaces of base respectively. When shaft hole and screw hole perpendicular to base 2 upper surfaces, shaft hole and screw hole more are convenient for process, and in the measurement process, the position degree is more convenient for calculate, and the calculated result is also more accurate, simultaneously, can also guarantee that the screw can screw in base 2's screw hole completely in, in order to guarantee this application polished rod position degree that position degree measuring device can measure the screw to ensure measuring precision and degree of accuracy.
Measuring shaft 1's measuring end is equipped with the pole hole, and this pole hole is used for installing percentage table 3, preferably, the pole hole is perpendicular with measuring shaft 1's lower surface, and the pole hole sets up the measurement and the calculation that more make things convenient for the screw position degree with measuring shaft 1's perpendicular. More preferably, the diameter of percentage table 3 measuring stick is less than the diameter in pole hole, the pole hole is little clearance fit with percentage table 3's measuring stick, and during little clearance fit can ensure that the measuring stick inserts the pole hole on the one hand, and on the other hand can ensure that percentage table 3 installs the back on measuring spindle 1, relative rocking about percentage table 3 can not appear, can effectively improve the measurement accuracy of measuring device screw position degree.
According to a preferred embodiment of the present invention, the dial indicator 3 is vertically mounted on the measuring shaft 1 through a bolt 4 and a nut 5, as shown in fig. 5.
According to the utility model discloses further preferred embodiment, the measuring stick of percentage table 3 all is located the below of measuring spindle 1 with the measuring hole of base 2. In the measuring process, the measuring rod of the dial indicator 3 is required to be always abutted against the polished rod of the screw to be measured, and the measuring rod of the dial indicator 3 and the measuring hole of the base 2 are required to be positioned on the same side of the measuring shaft 1.
The utility model discloses in, pole hole axis and measuring aperture axis on measuring spindle 1 and the base 2 are located the coplanar, when pole hole axis, shaft hole axis and measuring aperture axis are located the coplanar, the invention measuring device could high-efficient, accurate position degree to the screw polished rod measure.
According to the second aspect of the present invention, it is characterized in providing the measuring method of the measuring device for the screw polished rod position degree of the present invention, the method comprises the following steps:
This step is specifically described and illustrated below.
During the process that the screw 7 is screwed out of the threaded hole of the base 2 by 360 degrees, the top end part of the measuring rod of the dial indicator 3 is required to be always pressed against the surface of the screw 7, as shown in fig. 2, during the process that the screw is screwed out by 360 degrees, the maximum reading displayed by the dial indicator 3 is recorded and recorded as X1The minimum reading displayed is marked as X2. Assuming that the deviation between the reading of the dial indicator and the actual correct reading is delta (the reading is assumed to be negative and the deviation is positive), the position degree is recorded as X3；
X for position3Is shown, then X3＝[(X1+Δ)-(X2+Δ]/2＝(X1-X2)/2。
Can find out by the aforesaid, measuring device need not to calibrate measuring device before measuring, shortened measuring time, improved measurement of efficiency. And by measuring method and upper equation can know, measuring method simple, only need read out maximum and minimum, can calculate the position degree fast, measurement accuracy is high.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", and the like indicate the position or positional relationship based on the operating state of the present invention, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element indicated must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or a unitary connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On this basis, can be right the utility model discloses carry out multiple replacement and improvement, these all fall into the utility model discloses a protection scope.
Claims (8)
1. The device for measuring the position degree of the axis of the screw polish rod is characterized by comprising a measuring shaft (1), a base (2) and a dial indicator (3), wherein the measuring shaft (1) is arranged on the base (2), and the dial indicator (3) is arranged on the measuring shaft (1);
the measuring shaft (1) comprises a shaft end and a measuring end, wherein an external thread is arranged on the shaft end, and the shaft end and the measuring end are coaxial;
the base (2) is provided with a shaft hole and a measuring hole, and the dial indicator (3) is provided with a measuring rod.
2. The positional degree measuring apparatus according to claim 1,
the top end part of the measuring rod of the dial indicator (3) is hemispherical,
an internal thread is arranged in the measuring hole of the base (2), and the rotation direction, the thread pitch, the nominal diameter and the thread type of the internal thread are matched with the thread of the screw to be measured.
3. The positional degree measuring apparatus according to claim 2,
the size of the measuring hole of the base (2) is M12-6H, and the length of the measuring hole of the base (2) is the same as that of the threaded part of the screw to be measured.
4. The positional degree measuring apparatus according to claim 1,
the diameter of the shaft end of the measuring shaft (1) is smaller than that of the shaft hole, and the diameter of the measuring end of the measuring shaft (1) is larger than that of the shaft hole.
5. The positional degree measuring apparatus according to claim 4,
the shaft end of the measuring shaft (1) is in small clearance fit with the shaft hole of the base (2);
the shaft end of the measuring shaft (1) penetrates through the shaft hole of the base (2), the shaft end of the measuring shaft (1) is screwed tightly through the hexagonal nut (6), and the measuring shaft (1) is vertically arranged on the base (2).
6. The positional degree measuring apparatus according to claim 1,
the axle shafts of the axle holes and the measuring holes are parallel, and the axle holes and the measuring holes are respectively vertical to the upper surface of the base (2);
a rod hole is formed in the measuring end of the measuring shaft (1), and the rod hole is perpendicular to the lower surface of the measuring shaft (1).
7. The positional degree measuring apparatus according to claim 6,
the rod hole is in small clearance fit with a measuring rod of the dial indicator (3);
the dial indicator (3) is vertically arranged on the measuring shaft (1) through a bolt (4) and a nut (5).
8. The positional degree measuring apparatus according to claim 7,
the measuring rod of the dial indicator (3) and the measuring hole of the base (2) are both positioned below the measuring shaft (1);
the central axis of the rod hole on the measuring shaft (1) is positioned on the same plane with the central axis of the shaft hole and the central axis of the measuring hole on the base (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022271648.6U CN213238679U (en) | 2020-10-13 | 2020-10-13 | Position measuring device for screw polish rod axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022271648.6U CN213238679U (en) | 2020-10-13 | 2020-10-13 | Position measuring device for screw polish rod axis |
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| Publication Number | Publication Date |
|---|---|
| CN213238679U true CN213238679U (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022271648.6U Active CN213238679U (en) | 2020-10-13 | 2020-10-13 | Position measuring device for screw polish rod axis |
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| CN (1) | CN213238679U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284204A (en) * | 2020-10-13 | 2021-01-29 | 哈电集团（秦皇岛）重型装备有限公司 | Device and method for measuring position degree of screw polished rod axis |
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2020
- 2020-10-13 CN CN202022271648.6U patent/CN213238679U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112284204A (en) * | 2020-10-13 | 2021-01-29 | 哈电集团（秦皇岛）重型装备有限公司 | Device and method for measuring position degree of screw polished rod axis |
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