CN220127198U - Calibration structure of PQF continuous rolling frame calibration station - Google Patents
Calibration structure of PQF continuous rolling frame calibration station Download PDFInfo
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- CN220127198U CN220127198U CN202320670031.2U CN202320670031U CN220127198U CN 220127198 U CN220127198 U CN 220127198U CN 202320670031 U CN202320670031 U CN 202320670031U CN 220127198 U CN220127198 U CN 220127198U
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- 238000005096 rolling process Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The utility model relates to a calibration structure of a PQF continuous rolling stand calibration station, which comprises a zero-position stand and a calibration station, wherein the calibration station comprises two calibration planes and a contour stand, and the two calibration planes simultaneously support the zero-position stand; the center of the outline frame is used as a calibration center, a calibration center block is arranged, and the zero frame is temporarily fixed by a detection oil cylinder after being pushed into place by a calibration station base; the center of the zero-position rack is provided with a calibration center plate, the calibration center block is provided with two center block planes, the two center block planes are parallel to the two calibration planes in a one-to-one correspondence manner, the calibration center plate is provided with two center plate planes, the two center plate planes are parallel to the two calibration planes in a one-to-one correspondence manner, the calibration center block is embedded into the calibration center plate after the zero-position rack is pushed into the outline rack in place, and the adjustment of the normal direction of the corresponding calibration planes is guided by measuring the parallel interval between the center block planes and the center plate planes, so that the calibration of the calibration station is realized.
Description
Technical Field
The utility model relates to calibration of a PQF tandem rolling mill frame calibration station, in particular to a calibration structure of the calibration station.
Background
The continuous rolling stand calibration station of the continuous rolling stand of the PQF continuous rolling mill unit is required to calibrate before the continuous rolling stand is used, related data are collected, and deviation from a theoretical value caused by errors such as abrasion, machining and assembly of the continuous rolling stand is eliminated, so that a seamless steel pipe with higher precision is obtained. In order to ensure the self-positioning precision of the calibration station, the calibration station needs to be detected by using a zero-position rack and maintained; in general, the deviation of the calibration station is not great, the slight adjustment of the calibration station is usually fine adjustment in a specific direction or directions, and the accurate adjustment amount in the specific adjustment direction is ensured by an operator to accurately and quickly adjust the calibration station.
Disclosure of Invention
The utility model aims to provide a calibration structure of a novel PQF tandem rolling mill continuous rolling stand calibration station, which comprises a positioning accuracy detection auxiliary tool, so that the deviation and deviation direction of the calibration station relative to a zero-position stand can be detected rapidly, and the obtained detection data is convenient to maintain the calibration station.
The utility model solves the problems by adopting the following technical scheme: the calibration structure of the PQF tandem rolling mill frame calibration station comprises a zero frame and a calibration station, wherein the calibration station comprises two calibration planes and a contour frame, the two calibration planes are fixedly arranged on a calibration station base, and the two calibration planes simultaneously support the zero frame; the center of the outline frame is used as a calibration center, a calibration center block is arranged at the calibration center, the zero frame is supported on two calibration planes and then pushed into the outline frame by a calibration station base to be in place, and then the zero frame is acted by a detection oil cylinder to be temporarily fixed; the center of the zero-position rack is provided with a calibration center plate, the inner outline of the calibration center plate is larger than the outer outline of the calibration center block, the calibration center block is provided with two center block planes, the two center block planes are in one-to-one correspondence with the two calibration planes, the calibration center plate is provided with two center plate planes, the two center plate planes are in one-to-one correspondence with the two calibration planes, the calibration center block is embedded into the calibration center plate after the zero-position rack is pushed into the outline rack in place, the center block planes parallel to the same calibration plane are parallel to the center plate planes, and the difference between the measurement spacing of the center block planes and the center plate planes and the standard spacing is used for guiding the adjustment of the calibration station in the normal direction of the corresponding calibration plane.
As a preferred arrangement of one of the embodiments of the utility model, the normal lines of the two calibration planes can intersect at a calibration center.
As a preferable arrangement of one of the embodiments of the present utility model, the contour frame is in a ring shape, and is fixedly arranged, a positioning shaft is arranged at the center of the contour frame, and the calibration center block is fixedly arranged on the positioning shaft.
As a preferable arrangement of one embodiment of the utility model, the two calibration planes of the calibration station are respectively and obliquely arranged and mutually perpendicular, and the zero-position stand is independently supported by the two mutually perpendicular calibration planes, so that the calibration purpose can be achieved only by respectively adjusting the normal directions of the two calibration planes when the calibration station is calibrated.
As one of the implementation modes of the utility model, the detection oil cylinders are two groups of oil cylinders arranged on the outline rack, each group of oil cylinders are provided with three oil cylinders which are arranged at an angle of 120 degrees, the ejection direction of the oil cylinders faces to the calibration center, the two groups of oil cylinders are symmetrical to each other with the calibration center, and a plurality of oil cylinders are propped against the zero-position rack from different directions to fix the oil cylinders.
In a preferred embodiment of the present utility model, the spacer is laid on the alignment plane or the spacer is laid on the bottom of the component to which the alignment plane belongs, and the support thickness of the alignment plane is adjusted by increasing or decreasing the spacer. Obviously, the adjustment of the supporting height of the calibration plane to the zero-position rack belongs to displacement adjustment, so the adjustment of the calibration plane related to the utility model can be realized by various means and is not limited to the way of increasing or decreasing the gaskets.
The calibration method corresponding to the calibration structure of the calibration station of the PQF tandem mill frame comprises the following steps: the calibration station is calibrated by the zero-position frame, the calibration of the calibration station is realized by adjusting the supporting thickness of the two calibration planes in the normal direction of the two calibration planes, the calibration plane supporting the zero-position frame is used as an adjustment object, and the difference between the measuring interval and the standard interval between the center block plane and the center disc plane corresponding to the same calibration plane is used as an adjustment value of the supporting thickness of the calibration plane, so that the adjustment of the two calibration planes supporting the zero-position frame is completed. In this scheme, the standard spacing refers to the spacing between the center block plane and the corresponding center disk plane when the calibration center coincides with the center of the zero-bit gantry. The method is to adjust the thickness of the calibration plane support to enable the measurement spacing to approach the standard spacing infinitely.
Compared with the prior art, the utility model has the advantages that:
1. the calibration center block and the calibration center plate are designed, and the adjustment of the calibration thickness of the calibration plane is guided by utilizing the deviation of the measurement distance between the plane of the center block and the plane of the center plate and the standard distance, so that the deviation is convenient to measure and obtain.
2. The repeated workload possibly existing in repairing is reduced, and the workload of maintenance workers is reduced.
The calibration structure of the PQF tandem mill stand calibration station designed by the utility model can obviously improve the calibration of the calibration station, and has very important use value in the aspects of improving the quality of steel pipes and reducing the labor intensity of workers.
Drawings
Fig. 1 is a schematic diagram of a PQF tandem mill stand calibration station according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of calibration of a PQF tandem mill stand by a calibration station according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of calibration of a calibration station using a zero stage in an embodiment of the present utility model;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a measurement diagram of a calibration center block and a calibration center plate in an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a calibration center block according to an embodiment of the present utility model;
fig. 7 is a schematic structural view of a calibration center plate according to an embodiment of the present utility model.
Detailed Description
The utility model will be described in further detail below with reference to the accompanying examples, which are one of the preferred embodiments in the technical solution of the utility model, and are not to be construed as limiting the utility model. The text description in the embodiment corresponds to the drawings, the description related to the orientation is also based on the drawings, and the description is not to be construed as limiting the protection scope of the utility model.
Basic structure of PQF tandem mill stand calibration station and working principle of calibration of PQF tandem mill stand in calibration station:
as shown in fig. 1, a PQF tandem mill stand calibration station (hereinafter referred to as calibration station) includes a calibration center 1, lateral positioning blocks 2, a bottom positioning slide plate 3, a base 4, and detection cylinders 5 (6) with displacement sensors, the stand is supported on both the lateral positioning blocks 2 and the bottom positioning slide plate 3, the lateral positioning blocks 2 and the bottom positioning slide plate 3 have calibration planes for supporting the stand, respectively, and the two calibration planes are perpendicular to each other. The detection cylinders with the displacement sensors are divided into two groups, the two groups of detection cylinders 5 mutually form 120 degrees, the ejection directions of the cylinders face the calibration center 1, the two groups of detection cylinders are symmetrical to each other through the calibration center 1, the vertical distance between the calibration center 1 and the calibration plane of the lateral positioning block 2 is D, and the vertical distance between the calibration center 1 and the calibration plane of the bottom positioning slide plate 3 is H.
When the calibration station calibrates the stand, the stand is supported in the lateral positioning block 2 and the bottom positioning slide plate 3, and is positioned in the calibration station (see fig. 2), a group of detection cylinders 6 with displacement sensors, which are fixed in position, extend out to push rollers of the stand to swing towards the calibration block until the rollers are close to the calibration block, and the rollers form a standard hole type when the stand rolls a steel pipe, and at the moment, the displacement sensors read and store cylinder displacement values to finish calibration of the stand of the PQF tandem mill.
The purpose of the calibration station to calibrate the stand is that when the stand is put into use, the host actively compensates the roll reduction deviation of the stand for controlling the hole type size caused by processing errors, assembly errors, abrasion and the like according to the calibration value of the calibration station, thereby ensuring the roll hole type precision in the rolling process, and therefore, a seamless steel pipe with higher wall thickness precision can be obtained.
To ensure that the calibration values of the calibration station when calibrating the rack are true and reliable, it is necessary to ensure the accuracy of the calibration station itself, i.e. to ensure that the distances (H, D) from the calibration center 1 to the two calibration planes both meet the design requirements. However, in the process of calibrating the machine frame, the lateral positioning blocks 2 and the bottom positioning sliding plates 3 are worn, and when the wear reaches a certain degree, gaskets are added or directly replaced under the lateral positioning blocks 2 and the bottom positioning sliding plates 3, so that the accuracy of the calibrating station can be ensured, and the true and reliable calibration value of the machine frame is further ensured.
Because the space distance between the calibration center and the lateral positioning blocks 2 and the space distance between the calibration center and the bottom positioning sliding plate 3 are large, the measurement accuracy cannot be guaranteed by direct measurement, and therefore the calibration of the calibration station is completed by adopting an auxiliary device of a zero-position rack 6.
As shown in fig. 3-4, in order to calibrate the calibration structure of the calibration station, the calibration station has a contour frame 7 and a calibration center block 9 in addition to the lateral positioning block 2 and the bottom positioning slide plate 3, and six detection cylinders 5 are also disposed on the contour frame 7, and the center of the contour frame is used as the calibration center 1.
The center positioning shaft is arranged at the center of the calibration, the calibration center block 9 is arranged on the center positioning shaft, the installation matching surface adopts transition matching, so that the centering is accurate, and the calibration center block 9 is fixed on the center positioning shaft through two bolt holes and one positioning pin hole, so that the circumferential position of the calibration center block 9 in the calibration station is ensured to be unchanged. The outer contour of the calibration center block 9 is machined with four surfaces which are parallel to each other and perpendicular to the other two surfaces: the central block plane 901 (corresponding to four faces of a cube) ensures that the four faces are symmetrical to each other with respect to the inner contour cylindrical axis of the calibration central block 9, and the two faces parallel to each other are parallel to the calibration plane of the lateral positioning block 2 or the bottom positioning slide 3, respectively.
The center round hole is offered at the center of zero position frame 6 for set up calibration center dish 8, the installation mating surface adopts transition fit, makes its centering accurate, and fixes in the zero position frame through two bolt holes and a locating pin hole, guarantees that calibration center dish 8 remains unchanged equally in the position of zero position frame circumference. The calibration center disc 8 is hollow, and four surfaces which are parallel to each other and perpendicular to the other two surfaces are machined on the inner peripheral surface: the central disc plane 801 (corresponding to four faces of a cube) ensures that the four faces are symmetrical with respect to the cylindrical axis of the outer contour of the calibration central disc 8, two faces parallel to each other are parallel to the calibration plane of the lateral positioning block 2 or the bottom positioning slide 3, respectively.
The inner contour of the calibration center plate 8 is larger than the outer contour of the calibration center block 9, the calibration center block 9 is embedded into the calibration center plate 8 after the zero-position frame 6 is pushed into the contour frame in place, and the four center block planes of the calibration center block 9 are relatively parallel to the inner and outer surfaces of the four center plate planes of the calibration center plate 8. The lateral positioning block 2 or the bottom positioning slide plate 3 respectively corresponds to two pairs of mutually parallel center block planes and center disc planes, and half of the difference between the measurement distances between the two pairs of center block planes and the center disc planes can be used for teaching the adjustment of the thickness of the gasket of the lateral positioning block 2 or the bottom positioning slide plate 3 in the normal direction of the calibration plane.
The calibration method of the calibration station based on the calibration structure comprises the following steps:
A. mounting the calibration centre plate on a zero frame (note that the positioning is accurate)
B. Mounting the calibration center block on the center positioning shaft of the frame calibration station (note that positioning is accurate)
C. Pushing the zero-position frame into the calibration station to enable the calibration center block and the calibration center plate to coincide with each other (fig. 4) and to be positioned at a measurement position;
D. measurement of
When the measuring position is in the measuring position, the superposition condition of the calibration center disc and the calibration center block is shown in fig. 5; s1 and S2 and H1 and H2 are measured by plug gauges respectively as shown in FIG. 5;
if H2 & gt, H1 bottom positioning slide pad should be increased by (H2-H1)/2
If H2 < H1 bottom positioning slide pad is required to be reduced by (H1-H2)/2
If S1 & gt, S2 lateral positioning block pad should be increased by (S1-S2)/2
If S1 is smaller than S2, the lateral positioning block pad is required to be reduced by (S2-S1)/2
F. After the calibration station is repaired, whether the calibration station is qualified or not is judged
And repeating the detection steps, measuring H1, H2, S1 and S2, and when the deviation value of H1 and H2, S1 and S2 is smaller than the design requirement, namely, I H1-H2I is smaller than or equal to 0.05mm, I S1-S2I is smaller than or equal to 0.05mm, and the accuracy of the calibration station meets the design requirement.
Obviously, for the conception of the present utility model, besides the above embodiment, the calibration center disc and the calibration center block may be measured only by a set of center disc planes and a set of center block planes, and the thickness of the gasket corresponding to the calibration plane is adjusted according to the interval between the set of center disc planes and the relatively parallel center block planes, until the measured value approaches the standard value, and the deviation between the measured value and the standard value is less than or equal to 0.1mm, so as to meet the design requirement. The aforementioned standard value is the spacing of the center plate plane from the center block plane when the calibration center is fully coincident with the center of the zero-position gantry.
In addition to the above embodiments, the present utility model also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present utility model.
Claims (6)
1. A calibration structure of PQF tandem rolling mill stand calibration station, characterized in that: the calibration station comprises two calibration planes and a contour frame, wherein the two calibration planes are fixedly arranged on a base of the calibration station, and simultaneously support the zero frame; the center of the outline frame is used as a calibration center, a calibration center block is arranged at the calibration center, the zero frame is supported on two calibration planes and then pushed into the outline frame by a calibration station base to be in place, and then the zero frame is acted by a detection oil cylinder to be temporarily fixed; the center of the zero-position rack is provided with a calibration center plate, the inner outline of the calibration center plate is larger than the outer outline of the calibration center block, the calibration center block is provided with two center block planes, the two center block planes are in one-to-one correspondence with the two calibration planes, the calibration center plate is provided with two center plate planes, the two center plate planes are in one-to-one correspondence with the two calibration planes, the calibration center block is embedded into the calibration center plate after the zero-position rack is pushed into the outline rack in place, the center block planes parallel to the same calibration plane are parallel to the center plate planes, and the difference between the measurement spacing of the center block planes and the center plate planes and the standard spacing is used for guiding the adjustment of the calibration station in the normal direction of the corresponding calibration plane.
2. The calibration structure of the PQF tandem mill stand calibration station according to claim 1, wherein: the normal lines of two of said calibration planes can intersect at a calibration center.
3. The calibration structure of the PQF tandem mill stand calibration station according to claim 1, wherein: the profile frame is annular, is fixedly arranged, the center of the profile frame is provided with a positioning shaft, and the calibration center block is fixedly arranged on the positioning shaft.
4. The calibration structure of the PQF tandem mill stand calibration station according to claim 1, wherein: the two calibration planes are respectively arranged obliquely and are mutually perpendicular.
5. The calibration structure of the PQF tandem mill stand calibration station according to claim 1, wherein: the detection oil cylinders are two groups of oil cylinders arranged on the outline rack, three oil cylinders in each group are arranged at an angle of 120 degrees, the ejection direction of each oil cylinder faces to the calibration center, and the two groups of oil cylinders are symmetrical to each other with the calibration center.
6. The calibration structure of the PQF tandem rolling mill stand calibration station according to claim 1, wherein shims are laid on the calibration plane or on the bottom of the part to which the calibration plane belongs, and the support thickness of the calibration plane is adjusted by increasing or decreasing shims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670031.2U CN220127198U (en) | 2023-03-30 | 2023-03-30 | Calibration structure of PQF continuous rolling frame calibration station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670031.2U CN220127198U (en) | 2023-03-30 | 2023-03-30 | Calibration structure of PQF continuous rolling frame calibration station |
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| CN220127198U true CN220127198U (en) | 2023-12-05 |
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| CN202320670031.2U Active CN220127198U (en) | 2023-03-30 | 2023-03-30 | Calibration structure of PQF continuous rolling frame calibration station |
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