A straightness straightening tooling for a traveling wave accelerating tube and its straightening method

Abstract

The present invention discloses a straightness straightening tooling for a traveling wave accelerating tube and a straightening method thereof, which includes a platform. A pair of accelerating tube brackets are arranged on the platform, and the traveling wave accelerating tube is mounted on the accelerating tube brackets. A dial indicator and a pressing device are arranged between the two accelerating tube brackets. The dial indicator is used to measure the valley and peak points of the accelerating tube, and the pressing device is used for adjustment. Then, the valley and peak points are measured again, and the pressing device is used for adjustment again. Compared with the prior art, the straightness straightening tooling for a traveling wave accelerating tube and the straightening method thereof according to the present invention can accurately correct the straightness of the traveling wave accelerating tube, ensure that the electron loss during acceleration inside is smaller, and the output beam current is larger.

Description

Technical Field

[0001] The present invention relates to a straightness straightening tooling for a traveling wave accelerating tube and a straightening method thereof, belonging to the technical field of traveling wave accelerating tubes. Background Art

[0002] The straightness requirement of the accelerating tube is ±0.15 mm, and the length of a general accelerating tube is between 2 m and 3 m, so this requirement is very high.

[0003] Straightness is an important mechanical index of a traveling wave accelerating tube. The quality of the straightness directly affects the capture rate of the whole accelerating tube. The better the straightness of an accelerating tube, the smaller the electron loss accelerating through it, and the larger the output beam current. The accelerating tube is welded by a series of vanes and cavities. Each cavity and vane is processed separately and finally welded together. When welding, we also use various toolings to ensure its straightness. However, a traveling wave accelerating tube has 60 cavities and vanes at the shortest and 90 cavities and vanes at the longest. Therefore, it is impossible to ensure that the straightness of the accelerating tube meets the final requirement through the welding tooling. This requires us to straighten the welded accelerating tube to make its straightness meet the requirement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a straightness straightening tooling for a traveling wave accelerating tube and a straightening method thereof aiming at the deficiencies of the above-mentioned prior art.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is:

[0006] A straightness straightening tooling for a traveling wave accelerating tube includes a platform with high flatness. A pair of accelerating tube brackets are arranged on the platform, and the heights of the two accelerating tube brackets on the platform are the same. The two ends of the traveling wave accelerating tube are respectively mounted on the two accelerating tube brackets. A plurality of dial indicators and a jacking device are arranged between the two accelerating tube brackets. The tip of the dial indicator contacts the lower part of the traveling wave accelerating tube. The jacking device includes a pair of lead screws vertically fixed on the platform. A cross beam that can be adjusted up and down is arranged between the two lead screws. The cross beam is provided with a top block that can top against the lower part of the traveling wave accelerating tube or press against the upper part of the traveling wave accelerating tube.

[0007] As a further preferred scheme, the traveling wave accelerating tube is formed by connecting a plurality of cavities. There is a vane between adjacent two cavities, and the cavity is welded on the vane. The tip of the dial indicator is located on the cavity, and the jacking device acts on the vane.

[0008] As a further preferred scheme, the end of the cross beam is provided with a movable nut located on the lead screw, and the movable nut is provided with a locking mechanism.

[0009] As a further preferred solution, the accelerating tube support can fix the end of the traveling wave accelerating tube, and the height of the accelerating tube support is adjustable.

[0010] A straightness rectifying method for a traveling wave accelerating tube straightness rectifying tooling includes the following steps:

[0011] Step 1: Place the traveling wave accelerating tube on two accelerating tube supports, fix the ends of the traveling wave accelerating tube, measure the heights of the two accelerating tube supports with a dial indicator, and adjust the two accelerating tube supports to the same height;

[0012] Step 2: Measure along the length direction of the traveling wave accelerating tube with a dial indicator, measure the height values of all the cavity end welding points on the traveling wave accelerating tube, draw a curve graph around the ideal central straight line of the traveling wave accelerating tube, and obtain all the peak points and valley points in the length direction of the traveling wave accelerating tube;

[0013] Step 3: Select the closest pair of peak point and valley point, obtain the height difference between the two points, and take 1 / 2 of the height difference as the total correction value for this pair of peak point and valley point;

[0014] Step 4: Use a pressing device to press down at the highest peak point and use a pressing device to push up at the lowest valley point. The pressing and pushing points are both on the intermediate partition of two cavities;

[0015] Step 5: Start the pressing work. The maximum value of the pressing is the above total correction value. The pressing is carried out in multiple times. The maximum value of each pressing is 0.2 mm, the duration of each pressing is 4 hours. After each pressing is completed, measure along the length direction of the traveling wave accelerating tube with a dial indicator again to obtain all the new peak points and new valley points in the length direction of the traveling wave accelerating tube. Repeat the pressing work until the peak points and valley points reach the expected error range from the ideal central straight line;

[0016] Step 6: After the pressing and pushing are completed, keep all the pressing and pushing points under pressure for 24 hours. Check whether the dial indicator value changes before releasing. Release the stress for half an hour, and then release the pressing device. Measure the value of each cavity with a dial indicator, draw a curve graph, find the central straight line, and check whether the overall straightness meets the requirements. At this time, the rectification of one cross-section direction of the traveling wave accelerating tube is completed;

[0017] Step 7: Rotate the traveling wave accelerating tube 90° on the two accelerating tube supports, repeat Steps 2 to 6 to rectify the straightness of the other cross-section of the traveling wave accelerating tube;

[0018] Step 8: Fit the straightness of the two profiles of the traveling wave accelerating tube, calculate the total straightness of the traveling wave accelerating tube. If it is qualified, the straightening of the traveling wave accelerating tube is completed. The calculation method is as follows: Let the two profiles be the X-plane and the Y-plane, establish a coordinate system, the ideal center line is point o, the actual straightness values of the X-plane and the Y-plane are oa and ob respectively, and the oc value calculated through trigonometric functions is the straightness value of the inclined direction of the accelerating tube after fitting. As long as the oc value meets the straightness requirements of the traveling wave accelerating tube.

[0019] Compared with the prior art, a straightness straightening tooling and a straightening method for a traveling wave accelerating tube of the present invention can accurately correct the straightness of the traveling wave accelerating tube, ensure that the electron loss during acceleration inside is smaller, and the output beam current is larger. The better the straightness, the fewer scattered particles. The less the heating of the accelerating tube and other components caused by the scattered particles, and the better the vacuum degree of the whole machine during operation. In this way, the operating efficiency of the machine is improved, the obtained benefits are increased, and the service life of the machine is also improved. Description of the Drawings

[0020] Figure 1 is the top view of the present invention;

[0021] Figure 2 is the side view of the present invention;

[0022] Figure 3 is a schematic diagram of the pressing-down state of the top pressing device;

[0023] Figure 4 is a schematic diagram of the top-pushing state of the top pressing device;

[0024] Among them, 1 - platform, 2 - accelerating tube support, 3 - dial indicator, 4 - lead screw, 5 - cross beam, 6 - top block, 7 - movable nut, 8 - top pressing device, 9 - pressing plate. Detailed Embodiment

[0025] The preferred technical solutions of the present invention will be described in detail below with reference to the drawings.

[0026] Such as Figure 1As shown in the figure, a straightness straightening tooling for a traveling wave accelerating tube of the present invention is specifically applied to the straightness straightening of the accelerating tube, and includes a platform 1 with high flatness. The platform 1 is a large platform of 4000*1000mm, and the overall flatness of the platform 1 is 0.02mm, which is basically applicable to most traveling wave accelerating tubes. A pair of accelerating tube brackets 2 are arranged on the platform 1. The two accelerating tube brackets 2 have the same height on the platform 1. The two ends of the traveling wave accelerating tube are respectively placed on the two accelerating tube brackets 2. A plurality of dial indicators 3 (10) and jacking devices 8 (10 sets) are arranged between the two accelerating tube brackets 2. The accuracy of the dial indicator 3 is 0.01mm, and the measuring range is 0-10mm. The jacking device can realize functions such as jacking, pressing, and fixing. The tip of the dial indicator 3 contacts the lower part of the traveling wave accelerating tube. The jacking device includes a pair of lead screws 4 vertically fixed on the platform 1. The lead screws 4 are M20 stainless steel lead screws. A cross beam 5 that can be adjusted up and down is arranged between the two lead screws 4. A top block 6 that jacks against the lower part of the traveling wave accelerating tube or presses against the upper part of the traveling wave accelerating tube is arranged on the cross beam 5. The top block 6 is processed from epoxy resin material, which ensures that the surface of the accelerating tube will not be damaged during the jacking process.

[0027] The traveling wave accelerating tube is formed by connecting a plurality of cavities. There are baffles between adjacent two cavities. The cavities are welded on the baffles. The tip of the dial indicator 3 is located on the cavity, and the jacking device acts on the baffle.

[0028] An end of the cross beam 5 is provided with a movable nut 7. The movable nut 7 is located on the lead screw 4, and a locking mechanism is arranged on the movable nut 7.

[0029] A plurality of equally spaced screw holes are distributed on the platform 1. The lead screw 4 can be screwed into the screw hole. If the position of the baffle between two cavities (the position to be jacked) is exactly at the position of the screw hole, the lead screw 4 is directly placed in the screw hole for fixation to set up the jacking device. If the baffle position is between two screw holes, a fixing block can be used. The lead screw 4 is screwed into the fixing block, and then a pressing plate 9 is used to press on the fixing block for fixation.

[0030] The accelerating tube bracket 2 can fix the end of the traveling wave accelerating tube, and the height of the accelerating tube bracket 2 is adjustable.

[0031] A straightening method for a straightness straightening tooling of a traveling wave accelerating tube includes the following steps:

[0032] Step 1: Place the traveling wave accelerating tube on the two accelerating tube brackets 2, fix the ends of the traveling wave accelerating tube, measure the heights of the two accelerating tube brackets 2 with the dial indicator 3, and adjust the two accelerating tube brackets 2 to the same height;

[0033] Step 2: Measure along the length direction of the traveling wave accelerating tube with a dial indicator 3 to measure the height values of all the cavity end welding points on the traveling wave accelerating tube, draw a curve graph around the ideal central straight line of the traveling wave accelerating tube, and obtain all the peak points and valley points in the length direction of the traveling wave accelerating tube;

[0034] Step 3: Select the closest pair of peak point and valley point, obtain the height difference between the two points, and take 1 / 2 of the height difference as the total correction value for this pair of peak point and valley point;

[0035] Step 4: Use a pressing device to press down at the highest peak point and use a pressing device to push up at the lowest valley point. The pressing and pushing points are both on the middle partition of two cavities;

[0036] Step 5: Start the pressing work. The maximum value of the pressing is the above-mentioned total correction value. The pressing is carried out in multiple times. The maximum value of each pressing is 0.2 mm, and the duration of each pressing is 4 hours. After each pressing is completed, measure along the length direction of the traveling wave accelerating tube with the dial indicator 3 again to obtain all the new peak points and new valley points in the length direction of the traveling wave accelerating tube. Repeat the pressing work until the peak points and valley points reach the expected error range from the ideal central straight line;

[0037] Step 6: After the pressing and pushing are completed, keep all the pressing and pushing points under pressure for 24 hours. Check whether the dial indicator value changes before loosening, release the stress for half an hour, and then loosen the pressing device. Measure the value of each cavity with the dial indicator, draw a curve graph, find the central straight line, and check whether the overall straightness meets the requirements. At this time, the correction of one cross-section direction of the traveling wave accelerating tube is completed;

[0038] Step 7: Rotate the traveling wave accelerating tube 90° on the two accelerating tube brackets 2, repeat Steps 2 to 6 to correct the straightness of the other cross-section of the traveling wave accelerating tube;

[0039] Step 8: Fit the straightness of the two cross-sections of the traveling wave accelerating tube, calculate the total straightness of the traveling wave accelerating tube. If it is qualified, the straightening of the traveling wave accelerating tube is completed. The calculation method is as follows. Assume that the two cross-sections are the X plane and the Y plane, establish a coordinate system, the ideal center line is point o, the actual straightness values of the X plane and the Y plane are oa and ob respectively, and the oc value calculated through trigonometric functions is the straightness value of the inclined direction of the accelerating tube after fitting. As long as the oc value meets the straightness requirements of the traveling wave accelerating tube.

[0040] The above-mentioned specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manners of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A straightening method for a traveling wave accelerating tube straightness straightening tooling, which is realized based on the traveling wave accelerating tube straightness straightening tooling. The tooling includes a platform (1) with high flatness. A pair of accelerating tube brackets (2) are arranged on the platform (1). The heights of the two accelerating tube brackets (2) on the platform (1) are the same. The two ends of the traveling wave accelerating tube are respectively mounted on the two accelerating tube brackets (2). A plurality of dial indicators (3) and a jacking device are arranged between the two accelerating tube brackets (2). The tip of the dial indicator (3) contacts the lower part of the traveling wave accelerating tube. The jacking device includes a pair of lead screws (4) vertically fixed on the platform (1). A cross beam (5) that can be adjusted up and down is arranged between the two lead screws (4). A jacking block (6) that jacks against the lower part of the traveling wave accelerating tube or presses against the upper part of the traveling wave accelerating tube is provided on the cross beam (5); The straightening method includes the following steps: Step 1: Place the traveling wave accelerating tube on the two accelerating tube brackets (2), fix the ends of the traveling wave accelerating tube, measure the heights of the two accelerating tube brackets (2) with a dial indicator (3), and adjust the two accelerating tube brackets (2) to the same height; Step 2: Measure along the length direction of the traveling wave accelerating tube with a dial indicator (3), measure the height values of all the cavity end welding points on the traveling wave accelerating tube, draw a curve graph around the ideal central straight line of the traveling wave accelerating tube, and obtain all the peak points and valley points in the length direction of the traveling wave accelerating tube; Step 3: Select the closest pair of peak point and valley point, obtain the height difference between the two points, and take 1 / 2 of this height difference as the total correction value for this pair of peak point and valley point; Step 4: Use one jacking device to press down at the highest peak point and use one jacking device to jack up at the lowest valley point. The jacking and pressing points are both on the middle partition of two cavities; Step 5: Start the jacking and pressing work. The maximum value of jacking and pressing is the above total correction value. The jacking and pressing are carried out in multiple times. The maximum value of each jacking and pressing is 0.2 mm. The duration of each jacking and pressing is 4 hours. After each jacking and pressing is completed, measure along the length direction of the traveling wave accelerating tube with a dial indicator (3) again to obtain all the new peak points and new valley points in the length direction of the traveling wave accelerating tube. Repeat the jacking and pressing work until the peak points and valley points reach the expected error range from the ideal central straight line; Step 6: After the jacking and pressing are completed, keep all the jacking and pressing points under pressure for 24 hours. Check whether the dial indicator value changes before loosening. Release the stress for half an hour, and then loosen the jacking device. Measure the value of each cavity with a dial indicator, draw a curve graph, find the central straight line, and check whether the overall straightness meets the requirements. At this time, the correction of one cross-section direction of the traveling wave accelerating tube is completed; Step 7: Rotate the traveling wave accelerating tube 90° on the two accelerating tube brackets (2), repeat Steps 2 to 6, and correct the straightness of the other cross-section of the traveling wave accelerating tube; Step 8: Fit the straightness of the two profiles of the traveling wave accelerating tube, calculate the total straightness of the traveling wave accelerating tube, and if it is qualified, the straightening of the traveling wave accelerating tube is completed. The calculation method is as follows. Assume that the two profiles are the X-plane and the Y-plane, establish a coordinate system, the ideal center line is point o, the actual straightness values of the X-plane and the Y-plane are oa and ob respectively, and the oc value calculated through trigonometric functions is the straightness value of the inclined direction of the accelerating tube after fitting. As long as the oc value meets the straightness requirements of the traveling wave accelerating tube.

2. The straightening method of a traveling wave accelerating tube straightness straightening tooling according to claim 1, characterized in that: The traveling wave accelerating tube is formed by connecting multiple cavities. There are barrier plates between adjacent cavities. The cavities are welded to the barrier plates. The tip of the dial indicator (3) is located on the cavity, and the pressing device acts on the barrier plate.

3. The straightening method of a traveling wave accelerating tube straightness straightening tooling according to claim 1, characterized in that: The end of the cross beam (5) is provided with a movable nut (7). The movable nut (7) is located on the lead screw (4), and a locking mechanism is provided on the movable nut (7).

4. The straightening method of a straightness straightening tooling for a traveling wave accelerating tube according to claim 1, characterized in that: The accelerating tube support (2) can fix the end of the traveling wave accelerating tube, and the height of the accelerating tube support (2) is adjustable.

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