CN114029365A - Rotating target blank tube straightening method - Google Patents
Rotating target blank tube straightening method Download PDFInfo
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- CN114029365A CN114029365A CN202111337328.9A CN202111337328A CN114029365A CN 114029365 A CN114029365 A CN 114029365A CN 202111337328 A CN202111337328 A CN 202111337328A CN 114029365 A CN114029365 A CN 114029365A
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- Prior art keywords
- blank tube
- target blank
- rotating target
- rotating
- tube
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Classifications
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- 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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
Abstract
The invention relates to the technical field of target production, in particular to a rotating target blank tube straightening method. The method comprises the following steps: firstly, detecting a rotating target blank tube to find out the maximum bending position of the rotating target blank tube; then, rotating the rotary target blank tube to enable the arch face at the maximum bending position to face upwards; then heating the arched part to deform the rotating target blank tube; cooling the heating part in the step C to return to the room temperature; and then detecting the rotating target blank tube again to obtain the bending condition of the rotating target blank tube, finishing straightening if the straightness of the rotating target blank tube meets the requirement, and repeating the steps A-D until the straightness of the rotating target blank tube does not meet the requirement. The invention adopts a method of heating and cooling the arched part at the maximum bending part of the blank pipe to straighten the blank pipe, does not need a large-scale hydraulic press, and does not cause the deformation of the low-strength metal target under larger pressure.
Description
Technical Field
The invention relates to the technical field of target production, in particular to a rotating target blank tube straightening method.
Background
The rotary target is tubular, is used in the LOW-E glass industry, and generally has an inner diameter of 125 mm, an outer diameter of about 155 mm and a length of 3-4 m. The metal rotary target is generally prepared by the following two methods: the first method is that for high-strength metal, the metal is melted and cast, then the cast is extruded into a tube shape at high temperature and cooled to form a blank tube, then the blank tube is cut into required length, then two ports are machined, and the excircle of the blank tube is turned to obtain the finished target material; in the second method, for low-strength metal, the metal is melted and poured outside the stainless steel backing tube for cooling and forming to obtain a blank tube, then the blank tube is cut into required length, then two ports are machined, and the outer circle of the blank tube is turned to obtain the finished target.
In the first method, the extruded raw pipe has a certain curvature due to its long length, and the wall thickness is not uniform (thinner in one side in the circumferential direction and thicker in one side, but generally, the thinner side is thinner in the entire length direction of the raw pipe, but the thinner side is closer to both ends of the raw pipe, the thinner side is closer to the maximum curvature, the thicker side is thicker in the entire length direction of the raw pipe, but the thicker side is closer to both ends of the raw pipe, the thicker side is closer to the maximum curvature, that is, the wall thickness is closer to both ends of the raw pipe), although preliminary straightening is performed after extrusion, the maximum curvature is 5 mm, and the outer diameter of the raw pipe is generally left with a margin of 3 mm for cost saving. In the second method, since the stainless steel backing tube is thin (4 mm in wall thickness) and long in length, the blank tube obtained by casting is bent by up to 5 mm, and the wall thickness is not uniform, and the blank tube is limited by cost and practical conditions, and the outer diameter of the blank tube is generally only left with a margin of 3 mm. Therefore, before turning the outer circle, the tube blank must be straightened so that every point of the outer cylindrical surface of the tube blank can be turned to remove the outer scale and to achieve the desired run-out.
For the blank tube with the size, if straightening is carried out by a conventional method, a large hydraulic press is needed for straightening the bent part, and a general target material manufacturer cannot be provided with the large hydraulic press. And the low-strength metal target material can deform under larger pressure, so that the pressed position is not round and the wall thickness is thin.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for straightening a rotating target blank tube, aiming at the technical defects, the blank tube is straightened by heating and then cooling the arched part at the maximum bending part of the blank tube, a large-scale hydraulic press is not needed, and the low-strength metal target material cannot deform under a larger pressure.
According to the technical scheme adopted by the invention, the rotating target blank tube straightening method comprises the following steps:
A. detecting the rotating target blank tube to find out the maximum bending position of the rotating target blank tube;
B. rotating the rotary target blank tube to enable the arch face at the maximum bending position to face upwards;
C. heating the arched part to deform the rotating target blank tube;
D. cooling the heating part in the step C to return to the room temperature;
E. and D, detecting the rotating target blank tube again to obtain the bending condition of the rotating target blank tube, finishing straightening if the straightness of the rotating target blank tube meets the requirement, and repeating the steps A-D until the straightness of the rotating target blank tube does not meet the requirement.
In the step a, the maximum bending position of the rotating target blank tube is detected by using a lathe, the specific process is to fix two ends of the rotating target blank tube by using a chuck and a tailstock of the lathe respectively, and then the rotating target blank tube is rotated to find the maximum bending position of the rotating target blank tube by using a dial indicator.
In the step B, after the most curved bow-up surface of the rotating target blank tube is faced upward, the rotating target blank tube is held by a tool, then the chuck is released and the thimble on the tailstock is released, and then the operation of the step C is performed.
And E, fixing the two ends of the rotating target blank tube by using a chuck and a tailstock, removing the tool, and then rotating the rotating target blank tube to find and check the straightness of the rotating target blank tube by using a dial indicator.
In the step a, the two ends of the rotating target blank tube are placed on the rotating bracket to detect the maximum bending position of the rotating target blank tube, the strip-shaped object with better straightness is placed at the highest position of the rotating target blank tube, then the feeler gauge is used to determine the bending condition, then the rotating target blank tube is rotated to detect the position in the other circumferential direction, and the position of the maximum bending position can be obtained by rotating for a circle.
In step C, the heating temperature, heating time, and heating range are determined by considering the material, length, and bending degree of the rotating target blank tube.
Further optimizing the technical scheme, the straightening method also comprises the step of detecting the wall thickness condition of the rotating target blank tube, and the optimal straightness is determined by combining the wall thickness condition and the bending condition.
Compared with the prior art, the invention has the following advantages: 1. the existing lathe can be used for straightening, the cost of the rotary support and the oxyacetylene equipment is low, and the occupied area is small, so that the investment is low, and the implementation is easy; 2. the blank tube is straightened without adopting larger pressure, and the low-strength metal target material cannot deform due to larger pressure; 3. the wall thickness of the blank tube is combined for straightening, so that the wall thickness difference of the target material after being processed into a finished product is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a plug.
Fig. 2 is a schematic diagram of embodiment 2.
In the figure: 1. a plug; 2. rotating the bracket; 3. a parison tube; 4. and (4) square tubes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Example 1
And straightening the rotating nickel-chromium target blank tube.
A. Plugging one end of a rotating nickel-chromium target blank pipe with a plug 1, wherein as shown in figure 1, the plug 1 is cylindrical and is provided with a tapered hole and a step, the tapered hole is used for being matched with an ejector pin on a tailstock, and the step can block the outer wall of the rotating nickel-chromium target blank pipe and prevent the outer wall from being separated from one end of the tapered hole, so that the ejector pin can push up the ejector pin; then, one end of the rotating nickel-chromium target blank pipe, which is plugged with the plug 1, is tightly propped by an ejector pin of a lathe, the other end of the rotating nickel-chromium target blank pipe is clamped by a chuck of the lathe to support the inner wall, then, a dial indicator with a magnetic gauge stand is absorbed on a tool rest of the lathe, the rotating nickel-chromium target blank pipe is rotated, a slide carriage box is moved to drive the dial indicator to move along the direction of a guide rail, and the maximum bending position of the rotating target blank pipe is found out;
B. rotating the rotating nickel-chromium target blank tube to enable the arch surface at the maximum bending position to face to the right upper side, namely the blank tube is arched or protruded upwards; then, a tool such as a forklift or a crown block is used for supporting the rotating nickel-chromium target blank tube, and then a chuck and an ejector pin of the lathe are loosened, so that two ends of the blank tube can move during subsequent heating; preferably, a forklift or a crown block supports one end close to the thimble, then a chuck of the lathe is slightly loosened, the thimble returns backwards for a certain distance (at least completely escapes from the tapered hole), at the moment, one end of the rotating nickel-chromium target blank tube is supported by the forklift, and the other end of the rotating nickel-chromium target blank tube is supported by the chuck;
C. heating the maximum arching position by gas welding (oxyacetylene flame) (the heating range is punctiform, when the bending degree is more serious, the maximum arching position can also be heated in a certain length range along the axial direction of the blank tube at two sides of the maximum arching position), so that the maximum arching position is gradually reddened, the final temperature is preferably 900-1200 ℃, and at the moment, because the upper side temperature is high, the lower side temperature is low, the upward arching degree of the rotary nickel-chromium target material is larger;
D. after the heating in the step C is finished, immediately cooling the heating part by using tap water (spraying can be performed by using a water pipe, a bucket/basin is used for receiving water below the blank pipe to prevent a large amount of water from entering the turning liquid box), so that the turning liquid box is returned to the room temperature, and at the moment, the upward bow degree of the rotating nickel-chromium target material is smaller than that before the heating, and even the bending completely disappears;
E. and D, after the rotating nickel-chromium target blank pipe returns to the room temperature, clamping the rotating nickel-chromium target blank pipe on a lathe by using a chuck and an ejector pin, and detecting the rotating nickel-chromium target blank pipe by using the method in the step A again to obtain the bending condition of the rotating nickel-chromium target blank pipe. If the straightness of the rotating target blank tube meets the requirement at the moment, straightening is finished; if the target blank tube is not straight enough, repeating steps A-D until the target blank tube is straight enough.
In the step C, when the length of the rotating nickel-chromium target blank pipe is short or the bending degree is large, the heating time needs to be properly prolonged, the heating range needs to be a little longer, the extending direction of the heating range is along the axial direction of the blank pipe, and the maximum bow position is positioned at the middle point of the heating range. The longer the heating time and the longer the heating range, the greater the degree of bend recovery of the raw pipe, and the easier it becomes to straighten.
Example 2
And straightening the rotating nickel-chromium target blank tube.
A. As shown in fig. 2, two ends of a rotating nichrome target blank tube 3 are placed on rotating brackets 2, each rotating bracket 2 is provided with two rollers to facilitate the rotation of the blank tube 3, then a square tube 4 with high straightness (other strip-shaped articles with high straightness can be used, and the bending degree is less than 0.1 mm) is placed at the highest position of the blank tube 3, then a feeler is used to determine the bending condition, preferably, the bending value (the gap value measured by the feeler) is marked in the direction, then the blank tube 3 is rotated by a certain angle to detect the bending condition in the other direction, and the position of the maximum bending position can be obtained by rotating for one circle;
B. rotating the blank pipe 3 to enable the arch surface at the maximum bending position to face to the right upper side;
C. heating the maximum arching position by gas welding (oxyacetylene flame) (the heating range is punctiform, when the bending degree is more serious, the maximum arching position can also be heated in a certain length range along the axial direction of the blank pipe, so that the maximum arching position is gradually reddened, the final temperature is preferably 900-1200 ℃, and at the moment, because the upper side temperature is high, the lower side temperature is low, the upward arching degree of the blank pipe 3 is larger;
D. after the heating in the step C is finished, immediately cooling the heating part by using tap water (spraying can be carried out by using a water pipe, and water is received by using a water bucket/basin below the blank pipe 3 to prevent water from overflowing on the ground) so as to restore the blank pipe to the room temperature, wherein the upward bow degree of the blank pipe 3 is smaller than that before the heating, and even the bending disappears completely;
E. and (4) after the rotating nickel-chromium target blank pipe 3 is returned to the room temperature, detecting the rotating target blank pipe 3 again by using the method in the step A to obtain the bending condition of the rotating target blank pipe. If the straightness of the rotating target blank tube 3 meets the requirement at the moment, straightening is finished; if the target blank 3 is still out of alignment, steps A-D are repeated until it is in alignment.
In step C, when the length of the rotating nicr target blank tube 3 is short or the degree of curvature is large, the heating time is suitably prolonged, the heating range is also a little longer, the extending direction of the heating range is along the axial direction of the blank tube 3, and the maximum bowing position is located at the midpoint of the heating range. The longer the heating time and the longer the heating range, the greater the degree of bend recovery of the raw pipe, and the easier it becomes to straighten.
Example 3
Straightening rotating zinc-aluminum (zinc 98-aluminum 2) target blank tube
This embodiment is substantially the same as embodiment 1 or embodiment 2, except that when the maximum bowing portion is heated by gas welding (oxyacetylene flame) in step C, the heating range cannot be in a point shape, but must be within a certain length range on both sides of the maximum bowing portion in the axial direction of the raw pipe to avoid baking out of the zinc-aluminum material, and the raw pipe cannot be baked red, and the final temperature is preferably about 350 ℃.
Example 4
In this embodiment, based on embodiment 1, embodiment 2, or embodiment 3, the detection of the wall thickness of the target blank tube is added, an ultrasonic thickness gauge can be used to measure the wall thickness of the maximum bending position and the whole circle around the maximum bending position, if the wall thickness of the maximum bending position is larger than the average wall thickness and the wall thickness of the maximum bending position (i.e. the position opposite to the bending position) is larger than the average wall thickness, then in step E, after the final straightening is completed, the bending position at the maximum bending position is still higher than the two ends, so that the maximum bending position is machined off, the maximum bending position at the maximum bending position is machined off less, and the wall thickness difference between the two positions is reduced. For example, a blank tube with an outer diameter of 158 mm is bent to a maximum of 3 mm (i.e., in step a of example 2, the maximum bend is 3 mm higher than the end of the blank tube, and the opposite side of the maximum bend is about 3 mm lower than the end of the blank tube, the same applies below), the wall thickness of the maximum bend is 18.5, the opposite side of the maximum bend is 14.5, and the diameter of the finished product is 155 mm. After the final straightening, the original maximum bend is preferably 1 mm higher than the end of the tube blank, and after the tube blank is processed into a finished product, the wall thickness of the original maximum bend is 16 mm, the wall thickness opposite to the original maximum bend is 14 mm, and the wall thickness difference is reduced.
Claims (8)
1. A rotating target blank tube straightening method is characterized by comprising the following steps:
A. detecting the rotating target blank tube to find out the maximum bending position of the rotating target blank tube;
B. rotating the rotary target blank tube to enable the arch face at the maximum bending position to face upwards;
C. heating the arched part to deform the rotating target blank tube;
D. cooling the heating part in the step C to return to the room temperature;
E. and D, detecting the rotating target blank tube again to obtain the bending condition of the rotating target blank tube, finishing straightening if the straightness of the rotating target blank tube meets the requirement, and repeating the steps A-D until the straightness of the rotating target blank tube does not meet the requirement.
2. The method of claim 1, wherein the method comprises: in the step a, a lathe is used for detecting the maximum bending position of the rotating target blank tube, and the specific process is to fix two ends of the rotating target blank tube by using a chuck and a tailstock of the lathe respectively, then to rotate the rotating target blank tube, and to find out the maximum bending position of the rotating target blank tube by using a dial indicator.
3. The method of claim 2, wherein the method comprises: in the step B, after the bow-up surface at the maximum bending position of the rotating target blank tube is upward, the rotating target blank tube is held by a tool, then the chuck is loosened, the thimble on the tailstock is loosened, and then the operation of the step C is performed.
4. The method of claim 3, wherein the method comprises: in the step E, the chuck and the tailstock are used to fix the two ends of the rotating target blank tube, then the tool is removed, and then the rotating target blank tube is rotated to find out the straightness of the rotating target blank tube by using the dial indicator.
5. The method of claim 1, wherein the method comprises: in the step A, two ends of the rotary target blank tube are placed on the rotary bracket to detect the maximum bending position of the rotary target blank tube, the specific process is that the strip-shaped object with better straightness is placed at the highest position of the rotary target blank tube, then the feeler gauge is used for determining the bending condition, then the rotary target blank tube is rotated to detect the position of the other circumferential direction, and the position of the maximum bending position can be obtained by rotating for a circle.
6. The method of straightening a rotating target blank tube according to any of claims 1 to 5, characterized in that: in step C, the temperature and time of heating and the range of heating are determined by taking into account the material, length and degree of bending of the rotating target blank tube.
7. The method of straightening a rotating target blank tube according to any of claims 1 to 5, characterized in that: the method also comprises the step of detecting the wall thickness condition of the rotating target blank tube, and determining the optimal straightness by combining the wall thickness condition and the bending condition.
8. The method of claim 6, wherein the method comprises: the method also comprises the step of detecting the wall thickness condition of the rotating target blank tube, and determining the optimal straightness by combining the wall thickness condition and the bending condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337328.9A CN114029365A (en) | 2021-11-14 | 2021-11-14 | Rotating target blank tube straightening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337328.9A CN114029365A (en) | 2021-11-14 | 2021-11-14 | Rotating target blank tube straightening method |
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| CN114029365A true CN114029365A (en) | 2022-02-11 |
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| CN202111337328.9A Pending CN114029365A (en) | 2021-11-14 | 2021-11-14 | Rotating target blank tube straightening method |
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Citations (7)
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|---|---|---|---|---|
| RU2004138380A (en) * | 2004-12-27 | 2006-06-20 | ОАО "Чел бинский трубопрокатный завод" (RU) | PIPE EDITING METHOD |
| CN103691776A (en) * | 2013-12-11 | 2014-04-02 | 安徽伟宏钢结构集团股份有限公司 | Method for calibrating roundness of large-diameter thick-wall round pipe |
| CN105057405A (en) * | 2015-05-11 | 2015-11-18 | 基迈克材料科技（苏州）有限公司 | Sputtering rotary target material cylinder target straightness testing and aligning method |
| CN106345855A (en) * | 2016-08-30 | 2017-01-25 | 江阴兴澄特种钢铁有限公司 | Online flame straightening device and method of output shaft of KOCKS rolling mill |
| CN109396215A (en) * | 2018-12-02 | 2019-03-01 | 江苏迪格重工机械有限公司 | A kind of coalignment |
| CN110802137A (en) * | 2019-11-27 | 2020-02-18 | 天津市百成油田采油设备制造有限公司 | Automatic change alignment production line |
| CN211588060U (en) * | 2019-12-25 | 2020-09-29 | 南京欧美达应用材料科技有限公司 | Auxiliary device for straightening rotary target |
-
2021
- 2021-11-14 CN CN202111337328.9A patent/CN114029365A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2004138380A (en) * | 2004-12-27 | 2006-06-20 | ОАО "Чел бинский трубопрокатный завод" (RU) | PIPE EDITING METHOD |
| CN103691776A (en) * | 2013-12-11 | 2014-04-02 | 安徽伟宏钢结构集团股份有限公司 | Method for calibrating roundness of large-diameter thick-wall round pipe |
| CN105057405A (en) * | 2015-05-11 | 2015-11-18 | 基迈克材料科技（苏州）有限公司 | Sputtering rotary target material cylinder target straightness testing and aligning method |
| CN106345855A (en) * | 2016-08-30 | 2017-01-25 | 江阴兴澄特种钢铁有限公司 | Online flame straightening device and method of output shaft of KOCKS rolling mill |
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| CN110802137A (en) * | 2019-11-27 | 2020-02-18 | 天津市百成油田采油设备制造有限公司 | Automatic change alignment production line |
| CN211588060U (en) * | 2019-12-25 | 2020-09-29 | 南京欧美达应用材料科技有限公司 | Auxiliary device for straightening rotary target |
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