CN117816846A - Rolling torque compensation calculation method for conduit rolling equipment - Google Patents
Rolling torque compensation calculation method for conduit rolling equipment Download PDFInfo
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- CN117816846A CN117816846A CN202210339636.3A CN202210339636A CN117816846A CN 117816846 A CN117816846 A CN 117816846A CN 202210339636 A CN202210339636 A CN 202210339636A CN 117816846 A CN117816846 A CN 117816846A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 145
- 238000004364 calculation method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000012360 testing method Methods 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000009785 tube rolling Methods 0.000 claims 4
- 238000012545 processing Methods 0.000 abstract description 9
- 238000012937 correction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 17
- 238000013461 design Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000012797 qualification Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000001419 dependent effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
- B21D39/046—Connecting tubes to tube-like fittings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a rolling torque compensation calculation method of a conduit rolling device, which is used for determining the theoretical wall thickness and the theoretical intermediate diameter of a conduit; measuring the actual outer diameter of the conduit and the actual wall thickness of the conduit to be roll processed; the method for calculating the rolling torque compensation of the pipe rolling equipment increases the correction of the rolling torque variation caused by the variation of the pipe wall thickness and the pipe outer diameter in the rolling process according to the formula and the rolling torque T, eliminates the torque uncertainty factor in the flaring-free rolling process, realizes the accurate rolling of the hydraulic flaring-free connection technology, and obtains and records the standard according to different materials of the pipe and different wall thicknesses of the same material under various preset torques or rolling torque standard values, thereby facilitating the rolling processing of the pipe common materials and the common wall thicknesses in the later stage under different rolling torques.
Description
Technical Field
The invention relates to the technical field of conduit rolling connection, in particular to a conduit rolling equipment rolling torque compensation calculation method for compensating torque caused by wall thickness change and conduit outer diameter change in a conduit rolling process.
Background
The rolling of the catheter refers to that the catheter and the sleeve are subjected to plastic deformation by torque provided by rolling equipment, and are extruded into the notch of the sleeve, so that the aim of permanent connection is fulfilled. In the process of rolling the catheter assembly, the rolling equipment provides torque for the rolling pin through the core rod, and the rolling pin can continuously expand outwards to enable the catheter to generate plastic deformation, so that the catheter material is extruded into the sleeve groove of the catheter.
In the prior art, a large amount of torque data is needed to confirm a torque range value corresponding to a certain size of conduit, only a torque median value can be adopted for rolling in the actual rolling process, and whether the rolling meets design and use requirements is judged according to the rolling result.
The problems of the prior art are: if the inner diameter value of the conduit measured after rolling cannot meet the design requirement, secondary rolling (insufficient rolling) is allowed, so that the conduit is possibly cracked, or the conduit is directly scrapped (overspin), so that the problems of high rolling defective rate, multi-pass processing and the like of the conduit are caused due to the extremely large manufacturing uncertainty risk.
The technical problems to be solved by the invention are as follows: how to correct the torque of the rolling equipment for rolling the conduit according to the theoretical conduit size and the actual conduit size before rolling in the conduit rolling process, thereby improving the qualification rate of the finished products of conduit rolling and reducing the cost.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a compensation formula aiming at changing factors, and the rolling torque value of the guide pipe is adjusted according to the influences of the wall thickness change of the guide pipe, the outer diameter change of the guide pipe and the rolling torque reference value, so that the guide pipe can be rolled by calculating the optimal torque value no matter how the wall thickness and the outer diameter of the guide pipe change, thereby solving the problem of uncertainty of rolling torque, ensuring that the rolling of the guide pipe completely meets the design and use requirements, greatly improving the qualification rate of finished products of the rolling of the guide pipe, and reducing the production cost.
The technical scheme adopted by the invention is as follows:
a rolling torque compensation calculation method of a conduit rolling device,
s10, determining theoretical wall thickness delta of a conduit to be rolled 0 And the theoretical intermediate diameter D of the catheter mo ；
S20, measuring the actual outer diameter D of the catheter to be rolled t And the actual wall thickness delta of the catheter;
s30, calculating the actual intermediate diameter D of the catheter according to the formula (1) m ；
D m ＝D t -δ+2(δ 0 -δ) (1)
S40, calculating rolling torque T according to a torque compensation formula (2):
wherein: d (D) t -actual outer diameter of the catheter, delta-actual wall thickness of the catheter, delta 0 Theoretical wall thickness of the catheter, T 0 -torque reference value, T-rolling torque, D mo -theoretical intermediate diameter of catheter, D m -the actual pitch diameter of the catheter.
Further, the torque reference value T 0 The method is obtained through experiments, and comprises the following specific acquisition steps:
s1, selecting a catheter with the same wall thickness and outer diameter, rolling the catheter with preset rolling torque, and checking the filling rate of the catheter in a sleeve after rolling;
s2, judging whether the filling rate in the tube sleeve meets the requirement;
s3, if the filling rate is qualified, determining that the preset rolling torque is a torque reference value T 0 ；
If the filling rate is not acceptable, steps S1 and S2 are repeated.
Further, the torque reference value T 0 Is obtained by: repeatedly acquiring a torque reference value T for 3-5 times 0 ，
Rear pair of 3-5 torque reference values T 0 And obtaining an average value.
Further, the torque reference value T is obtained for various conduit wall thicknesses with different conduit material properties 0 Testing;
recording torque reference value T for different catheter wall thicknesses for each catheter material attribute 0 。
Further, the measurements of the actual wall δ of the catheter were averaged 4 times and more.
Further, the actual outer diameter D of the catheter t Average values were taken at 2 or more times.
Further, the actual wall thickness delta of the conduit and the actual outer diameter D of the conduit t The measurement points are uniformly acquired in the circumferential direction of the catheter according to the corresponding measurement times.
Compared with the prior art, the invention has the beneficial effects that:
1. the method has the advantages that rolling torque change correction caused by variable (conduit wall thickness change and conduit outer diameter change) in the rolling process is increased, torque uncertainty factors in the flaring-free rolling process are eliminated, rolling torque can be accurately confirmed before rolling, and accurate rolling of the hydraulic flaring-free connection technology is realized.
2. The method can form enterprise standard or industry standard, and directly searches the standard when processing or production is needed, thereby saving the period and cost of pipe rolling processing and greatly improving the production efficiency and qualification rate of pipe rolling.
3. According to the corresponding measurement times, the measurement points are uniformly obtained in the circumferential direction of the catheter, so that the uniformity of the actual wall thickness of the catheter and the actual outer diameter of the catheter can be better obtained, and the qualification rate of the catheter is improved.
In summary, the rolling torque compensation calculation method of the pipe rolling device increases the dependent variable in the rolling process: the rolling torque change correction caused by the wall thickness change and the outer diameter change of the conduit eliminates the torque uncertainty factor in the flaring-free rolling process, realizes the accurate rolling of the hydraulic flaring-free connection technology, and obtains and records the standard according to different materials of the conduit and different wall thicknesses of the same material under various preset torques or rolling torque standard values to facilitate the rolling processing of the common materials and the common wall thicknesses of the conduit under different rolling torques in the later period.
Drawings
FIG. 1 is a flow chart of a method of calculating roll torque compensation for a tube roll device;
fig. 2 shows the torque reference value T of the rolling torque compensation calculation method of the pipe rolling device 0 A specific acquisition flow chart obtained through experiments;
FIG. 3 is a view showing a connection structure of the catheter 1 and the sleeve 2;
wherein: 1-catheter, 2-tube sleeve.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated combinations or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, in the description process of the embodiment of the present invention, the positional relationships of the devices such as "upper", "lower", "front", "rear", "left" and "right" in all the figures are all standardized in fig. 1.
As shown in fig. 1, a rolling torque compensation calculation method of a catheter rolling device is shown as a reference numeral 2, wherein a catheter sleeve is provided with a catheter 1;
s10, determining the theoretical wall thickness delta of the guide pipe to be rolled and processed into the guide pipe 1 0 And the theoretical intermediate diameter D of the catheter mo ；
S20, measuring the actual outer diameter D of the guide pipe 1 to be rolled t And the actual wall thickness delta of the catheter;
s30, calculating the actual intermediate diameter D of the catheter according to the formula (1) m ；
S40, calculating rolling torque T according to a torque compensation formula (2):
D m ＝D t -δ+2(δ 0 -δ) (1)
wherein: d (D) t -actual outer diameter of the catheter, delta-actual wall thickness of the catheter, delta 0 Theoretical wall thickness of the catheter, T 0 -torque reference value, T-rolling torque, D mo -theoretical intermediate diameter of catheter, D m -the actual pitch diameter of the catheter.
Calculation of actual Medium diameter Dm of catheter example: for a specification of 08x0.6 catheter:
D j0 ＝8.1；C＝0.08；Δδ＝0.64；
then D s0 ＝8.1+2*0.08-2*0.64＝6.98。
According to the rolling torque compensation method, the rolling torque value of the guide pipe is adjusted according to the influences of the wall thickness change of the guide pipe, the outer diameter change of the guide pipe and the rolling torque reference value, so that the optimal torque value can be calculated to roll the guide pipe no matter how the wall thickness and the outer diameter of the guide pipe change, the problem of uncertainty of rolling torque is solved, the rolling of the guide pipe completely meets the design and use requirements, and meanwhile, the qualification rate of rolling products of the guide pipe is greatly improved.
As seen from the flowchart of fig. 2, the torque reference value T0 of the rolling torque compensation calculation method of the pipe rolling device is obtained through experiments, and specifically the steps of obtaining are as follows:
s1, selecting a catheter with the same wall thickness and outer diameter, rolling the catheter with preset rolling torque, and checking the filling rate of the catheter 1 in the sleeve 2 after rolling;
s2, judging whether the filling rate in the tube sleeve meets the requirement;
s3, if the filling rate is qualified, determining that the preset rolling torque is a torque reference value T 0 ；
If the filling rate is not acceptable, steps S1 and S2 are repeated.
In the specific implementation process, the torque reference value T of the rolling torque compensation calculation method of the pipe rolling equipment 0 Is obtained by: repeatedly acquiring a torque reference value T for 3-5 times 0 Last pair of 3-5 torque reference values T 0 The average value is obtained, so that the torque reference value T during the formal production and rolling of the catheter can be better ensured 0 Can better fit the actual rolling requirement of the guide pipe and ensure corrected rolling torque TCan manufacture more qualified duct products and improve the qualification rate of the duct products.
In a more preferred embodiment, the torque reference value T is obtained for various conduit wall thicknesses of different conduit material properties by a conduit rolling torque compensation calculation method of the conduit rolling equipment 0 Testing; recording torque reference value T for different catheter wall thicknesses for each catheter material attribute 0 Therefore, the catheter rolling torque of different catheter wall thicknesses of common catheter materials can be tested in a concentrated time and period to form enterprise standards or industry standards, and the standards are directly searched when the processing or production is needed, so that the period and the cost of catheter rolling processing are saved, and the production efficiency and the qualification rate of catheter rolling are greatly improved.
In a more preferred embodiment, the actual wall delta of the conduit is measured by the conduit rolling torque compensation calculation method by taking an average value of 4 times or more; to ensure a more accurate actual wall thickness of the catheter is obtained.
In a more preferred embodiment, the actual outer diameter D of the catheter is calculated by a method for compensating the rolling torque of the catheter rolling device t Taking average value according to 2 times and above; to ensure a more accurate actual wall thickness of the conduit and an actual outside diameter dimension of the conduit.
In a more preferred embodiment, the actual wall thickness delta of the conduit and the actual outer diameter D of the conduit are calculated by a conduit rolling torque compensation calculation method of a conduit rolling device t When the measuring points are measured in the circumferential direction of the catheter according to the corresponding measuring times, the uniformity of the actual wall thickness of the catheter and the actual outer diameter of the catheter can be better obtained, and the qualification rate of the catheter is improved. In a specific measurement process, the actual wall thickness delta 4 times (at the positions of 0 DEG, 90 DEG, 180 DEG and 270 DEG of the catheter) and the actual outer diameter D of the catheter are measured firstly, usually before rolling t 2 times (at the positions of the catheter 1 at angles of 180 ° or at angles of 90 ° and 270 °); secondly, the actual average value is brought into a compensation formula (2) to calculate an optimal rolling torque value; and finally, inputting an optimal torque value on rolling equipment to roll and checking whether the guide pipe meets the rolling design requirement.
Examples
The data of tables 1 and 2, 3 and 4 below were obtained by rolling the g8x0.6, g10x0.7 and G12x1 catheters as test subjects and compensating by the above-mentioned compensation method.
Table 1 shows the values calculated for the three catheters using the compensation method of the present invention
Table 2 shows the data obtained from the rolling test of the G8x0.6 catheter
As shown in table 2, in the process of rolling the guide pipe in the later stage, as long as the rolling torque value input into the rolling equipment is equal to or greater than the calculated torque value of 0.73n.m, the filling rate of the guide pipe is greater than 85%, so as to meet the design requirement; meanwhile, correspondingly, in order to meet the design requirement of the guide pipes when the guide pipes are rolled in batches at a later stage, the error of the input rolling torque value of the input rolling equipment cannot exceed 5% of the calculated value of the actual torque value with the filling rate of 100%, namely, the input torque can be 0.73N.m-0.33512844N.m.
Table 3 shows the data obtained from the rolling test of G10x0.7 catheter
As shown in Table 3, the filling rate of the guide pipe is more than 85% as long as the rolling torque value input into the rolling equipment is equal to or more than the calculated torque value in the process of rolling the guide pipe in the later stage according to the use requirements of Table 2, so that the design requirements are met; in the later stage of the rolling process of the batch of the pipes, the error of the rolling torque value input into the rolling device cannot exceed 5% of the calculated value of 2.716294813N.m for the G10x0.7 pipe to be nevertheless rolled.
Table 4 shows the data obtained from the rolling test of the G12x1 catheter
As seen from table 4, as long as the input rolling torque value is equal to or greater than the calculated torque value of 3.23n.m, the filling rate of the guide pipe is greater than 85%, meeting the design requirements; in the later stage, when the rolling processing of the batch pipes is carried out, in order to obtain the G12x1 pipe which is not too rolled, the error of the actual torque value actually input into the rolling equipment is preferably not more than 5% of the calculated value of 3.4560200999 N.m.
As can be seen from the test of the rolled guide pipe, the rolling torque compensation calculation method of the guide pipe rolling equipment increases the dependent variable in the rolling process: the rolling torque change correction caused by the wall thickness change and the outer diameter change of the conduit eliminates the torque uncertainty factor in the flaring-free rolling process, realizes the accurate rolling of the hydraulic flaring-free connection technology, and obtains and records the standard according to different materials of the conduit and different wall thicknesses of the same material under various preset torques or rolling torque standard values to facilitate the rolling processing of the common materials and the common wall thicknesses of the conduit under different rolling torques in the later period.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.
Claims (7)
1. The rolling torque compensation calculation method of the pipe rolling equipment is characterized by comprising the following steps of:
s10, determining the theoretical wall thickness and the theoretical medium diameter of the guide pipe to be rolled;
s20, measuring the actual outer diameter of the guide pipe and the actual wall thickness of the guide pipe to be rolled;
s30, calculating the actual intermediate diameter of the catheter according to the formula (1);
D m ＝D t -δ+2(δ 0 -δ) (1)
s40, calculating rolling torque T according to a torque compensation formula (2):
wherein: d (D) t -actual outer diameter of the catheter, delta-actual wall thickness of the catheter, delta 0 Theoretical wall thickness of the catheter, T 0 -torque reference value, T-rolling torque, D mo -theoretical intermediate diameter of catheter, D m -the actual pitch diameter of the catheter.
2. The method for calculating rolling torque compensation of a tube rolling device according to claim 1, wherein: the torque reference value is obtained through experiments, and the specific obtaining steps are as follows:
s1, selecting a catheter with the same wall thickness and outer diameter, rolling the catheter with preset rolling torque, and checking the filling rate of the catheter (1) in the sleeve (2) after rolling;
s2, judging whether the filling rate in the tube sleeve meets the requirement;
s3, if the filling rate is qualified, determining a preset rolling torque as a torque reference value;
if the filling rate is not acceptable, steps S1 and S2 are repeated.
3. The method for calculating rolling torque compensation of a tube rolling device according to claim 2, wherein: and (3) obtaining the torque reference value: repeatedly obtaining the torque reference value for 3-5 times, and then obtaining the average value of the 3-5 torque reference values.
4. A catheter roll device roll torque compensation calculation method according to claim 3, wherein: performing a torque reference value acquisition test on various conduit wall thicknesses with different conduit material properties;
torque reference values for different conduit wall thicknesses for each conduit material property are recorded.
5. The catheter roll-off torque compensation calculation method according to claim 3 or 4, characterized in that:
the actual wall of the catheter was measured 4 times and above.
6. The method for calculating rolling torque compensation of a tube rolling device according to claim 5, wherein: the actual outer diameter of the catheter was measured 2 times and averaged over.
7. The method for calculating rolling torque compensation of a tube rolling device according to claim 6, wherein: when the actual wall thickness and the actual outer diameter of the catheter are measured, measuring points are uniformly obtained in the circumferential direction of the catheter according to the corresponding measuring times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339636.3A CN117816846A (en) | 2022-04-01 | 2022-04-01 | Rolling torque compensation calculation method for conduit rolling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339636.3A CN117816846A (en) | 2022-04-01 | 2022-04-01 | Rolling torque compensation calculation method for conduit rolling equipment |
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| Publication Number | Publication Date |
|---|---|
| CN117816846A true CN117816846A (en) | 2024-04-05 |
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ID=90504670
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210339636.3A Pending CN117816846A (en) | 2022-04-01 | 2022-04-01 | Rolling torque compensation calculation method for conduit rolling equipment |
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| Country | Link |
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| CN (1) | CN117816846A (en) |
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2022
- 2022-04-01 CN CN202210339636.3A patent/CN117816846A/en active Pending
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