Sliding rail straightness control method suitable for rocket sled sliding separation

Abstract

The invention discloses a slide rail straightness control method suitable for sliding separation of a rocket sled, and straightness control is realized by reserving machining allowance in a machining process, performing high-precision measurement and segmented and layered welding in a final assembly welding process and controlling deformation. According to the method, the safety and reliability in the measuring and machining process can be guaranteed, and the high-precision positioning of the sliding rail and the high-precision requirements for the straightness and parallelism of the sliding rail can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of shooting range testing, and in particular relates to a slide rail straightness control method suitable for the sliding separation of a rocket sled. Background Art

[0002] During the rocket sled test, the track has a small static load and a large dynamic load. The random unevenness of the track will directly affect the vibration speed and acceleration of the rocket sled during operation, which is one of the most important factors that seriously affect the safety of the rocket sled test. The existing separation methods for the rocket sled test include slowing down the sled after the sled is released to achieve the heading distance and moving the sled downward along the arc track after the sled is released to achieve the vertical distance. The guided thermal separation method of setting a slide rail on the sled and boosting it by rocket is the first time, and there is no related method for controlling the straightness of the sliding separation rail. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a method for controlling the straightness of a slide rail suitable for the sliding separation of a rocket sled, which controls the deformation and realizes straightness control by reserving machining allowances during machining, high-precision measurement during assembly welding, and segmented and layered welding. The safety and reliability of the measurement and machining process of the method of the present invention can be guaranteed, and the high-precision positioning of the slide rail and the high-precision requirements of the straightness and parallelism of the slide rail can be realized.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0005] Step 1: heat treatment of raw materials;

[0006] Step 2: Rough processing of raw materials;

[0007] The rough blank of the slide rail is processed by a gantry milling machine, which is turned upside down and left and right four times. The processing amount each time is amm, and the cross-sectional shape of the slide rail is reserved with a processing allowance of bmm.

[0008] Step 3: Stress relief tempering;

[0009] Step 4: Finishing;

[0010] The gantry milling machine is used to finish the rail blank, turning it upside down and left and right four times, with a machining amount of cm each time, and a dmm margin left on both sides and the top of the rail;

[0011] Step 5: Installation platform and tooling preparation;

[0012] The skid platform, i.e. the slide rail installation platform, is used to process the process positioning blocks for fixing the slide rails and the track gauge for separating the slide rails, and the centerline position of the track gauge is calibrated;

[0013] Step 6: Precise positioning of the slide rail;

[0014] Step 6-1: Place the slide rail at the position where the separation slide rail is installed on the sled platform, calibrate the centerline position of the rocket sled test slide rail with a laser theodolite and a rocket sled test track gauge, and determine the measurement benchmark for the straightness of the separation slide rail;

[0015] Step 6-2: Use a level to measure the height difference between the separation rail and the skid body, and use a U-shaped clamp and a pad to adjust the separation rail to the required levelness of the separation rail;

[0016] Step 6-3: Select 5-8 measuring points in the length direction of the symmetrical positions of the two separation slide rails, and use a laser tracker and a separation slide rail gauge to measure the deviation between the center line of the two separation slide rails and the measurement reference at each point. When the deviation is greater than emm, use the top screw bolt on the process positioning block to adjust the deviation of the center line of the separation slide rail until it meets the requirement;

[0017] Step 7: Final assembly welding;

[0018] The assembly welding is carried out by sequential layered welding from the middle to both ends, and the welding deformation is controlled during the welding process;

[0019] Step 8: Re-inspect after welding;

[0020] Conduct measurement recheck to confirm that the deviation does not exceed fmm;

[0021] Step 9: Overall finishing;

[0022] After the final assembly re-inspection is completed, the upper plane of the separation slide rail is fine-machined on the gantry milling machine with the lower plane of the upper slider of the rocket sled test separation shoe as the reference; the side of the separation slide rail is fine-machined with the center line of the left and right separation shoes of the rocket sled test as the reference; finally, the machine tool is used to ensure that the straightness of the separation slide rail is ≯gmm.

[0023] Preferably, in step 5, five pairs of positioning blocks are processed at symmetrical positions on both sides of each rail, and the positioning blocks are provided with adjusting screw bolts.

[0024] Preferably, a=1, b=3, c=0.5, d=1, e=0.2, f=1, and g=0.5.

[0025] Preferably, the stress relief annealing temperature is 200°C.

[0026] A computer program enables a computer to execute the above-mentioned slide rail straightness control method.

[0027] An electronic device comprises: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the above-mentioned slide rail straightness control method.

[0028] A computer-readable storage medium stores a computer program, which implements the above-mentioned slide rail straightness control method when executed by a processor.

[0029] A chip includes: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the above-mentioned slide rail straightness control method.

[0030] A computer program product includes a computer storage medium storing a computer program, wherein the computer program includes instructions executable by at least one processor, and when the instructions are executed by the at least one processor, the above-mentioned slide rail straightness control method is implemented.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1) The measurement and processing of this method adopt mature technologies, and the safety and reliability of the measurement and processing can be guaranteed;

[0033] 2) This method uses special tooling, laser theodolite and laser tracker for high-precision measurement and positioning, which can achieve high-precision positioning of the slide rail;

[0034] 3) This method realizes the high-precision requirements of straightness and parallelism of the slide rail by secondary processing of the entire skid body after welding. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with embodiments.

[0036] In view of the problem that there is no corresponding straightness control method and measurement method for the processing of the thermal separation sliding rails of the rocket sled, the present invention provides a mature straightness control method and measurement method for the processing and assembly of the thermal separation sliding rails of the rocket sled, which can realize the control and measurement of the straightness accuracy requirements of the thermal separation sliding rails of the rocket sled, so as to effectively ensure the straightness accuracy of the processing and assembly of the thermal separation sliding rails of the rocket sled, and the control and measurement methods are safe and reliable.

[0037] The technical solution adopted by the present invention to solve its technical problem is:

[0038] (1) Heat treatment of raw materials;

[0039] (2) Rough processing of raw materials;

[0040] A gantry milling machine is used to rough-process the rough blank of the slide rail, turning it upside down and left and right four times, with a processing amount of 1mm each time, and a 3mm processing allowance is reserved for the cross-sectional shape of the slide rail.

[0041] (3) Stress relief tempering;

[0042] (4) Finishing;

[0043] The slide rail blank is finished by using a gantry milling machine, flipped up and down and left and right four times, with each processing amount of 0.5mm, leaving a 1mm margin on both sides and the top (rocket sled test mating surface) of the slide rail.

[0044] (5) Installation platform and tooling preparation;

[0045] The process positioning blocks for fixing the slide rails are machined on the skid platform (slide rail installation platform) (5 pairs of positioning blocks are machined at symmetrical positions on both sides of each rail, and there are adjusting screw bolts on the positioning blocks). The track gauge of the separate slide rails is also machined and the centerline position of the track gauge is calibrated.

[0046] (6) Precise positioning of the slide rail;

[0047] Place the slide rail on the skid platform where the separation slide rail is to be installed, calibrate the centerline position of the rocket sled test slide rail with a laser theodolite and a rocket sled test track gauge, and determine the measurement benchmark for the straightness of the separation slide rail. (Use a level to measure the horizontal height difference of the separation slide rail relative to the skid, and use a U-shaped clamp and a pad to adjust the separation slide rail to the horizontality requirement of the separation slide rail;) Then select 5-8 measurement points in the length direction of the symmetrical positions of the two separation slide rails, and use a laser tracker and a separation slide rail gauge to measure the deviation between the centerline of the two separation slide rails at each point and the measurement benchmark. When the deviation is greater than 0.2mm (straightness requirement), use the top screw bolt on the process positioning block to adjust the deviation of the centerline of the separation slide rail until it meets the requirement.

[0048] (7) Final assembly welding;

[0049] The assembly welding is carried out by sequential layered welding from the middle to both ends, and the welding deformation is controlled during the welding process.

[0050] (8) Re-inspection after welding;

[0051] Re-measure according to sequence number (5) to confirm that the deviation does not exceed 1mm.

[0052] (9) Overall finishing;

[0053] After the final assembly and re-inspection is completed, the upper plane of the separation slide rail is fine-machined on the gantry milling machine with the lower plane of the upper slider of the rocket sled test separation slide as the reference; the side of the separation slide rail is fine-machined with the center line of the left and right separation slide shoes of the rocket sled test as the reference. Finally, the machine tool is used to ensure that the straightness of the separation slide rail is ≯0.5mm.

[0054] Example:

[0055] This embodiment is a rocket sled test sled body processing carried out using the method of the present invention. This rocket sled test has been successfully implemented, the linearity control of the sliding separation rail meets the design requirements, and the rocket sled separation is normal.

[0056] 1) Heat treatment of raw materials;

[0057] 2) Rough processing of raw materials;

[0058] Each time the machining is 1mm, 3mm machining allowance is reserved for the outer shape.

[0059] 3) Stress relief tempering at 200°C;

[0060] 4) Finishing;

[0061] Each time the machining is 0.5mm, 1mm machining allowance is reserved for the outer shape.

[0062] 5) Tool preparation;

[0063] Process and separate the slide rail gauge according to the drawing and mark the center position.

[0064] 6) Precise positioning of the slide rail;

[0065] Place the slide rail on the skid platform installation position and adjust and position it by measuring with a laser theodolite and laser tracker.

[0066] 7) Use this method to weld the slide rail and the skid platform;

[0067] 8) Re-inspection after welding;

[0068] The slide rails are re-inspected using a laser theodolite and a laser tracker to ensure that the straightness of the separation slide rails is less than 1 mm.

[0069] 9) Overall finishing of the skid platform and the slide rail;

[0070] The mating surface of the separation slide is finely processed by a gantry milling machine to ensure that the straightness of the separation slide is ≯0.5mm.

Claims

1. A method for controlling the straightness of a slide rail suitable for the sliding separation of a rocket sled, characterized in that: The steps include: Step 1: heat treatment of raw materials; Step 2: Rough processing of raw materials; The rough blank of the slide rail is processed by a gantry milling machine, which is turned upside down and left and right four times. The processing amount each time is amm, and the cross-sectional shape of the slide rail is reserved with a processing allowance of bmm. Step 3: Stress relief tempering; Step 4: Finishing; The gantry milling machine is used to finish the rail blank, turning it upside down and left and right four times, with a machining amount of cmm each time, and a dmm margin is left on both sides and the top of the rail; Step 5: Installation platform and tooling preparation; The skid platform, i.e. the slide rail installation platform, is used to process the process positioning block for fixing the slide rail and the track gauge for separating the slide rail, and the centerline position of the track gauge is calibrated; Step 6: Precise positioning of the slide rail; Step 6-1: Place the slide rail at the position where the separation slide rail is installed on the sled platform, calibrate the centerline position of the rocket sled test slide rail with a laser theodolite and a rocket sled test track gauge, and determine the measurement benchmark for the straightness of the separation slide rail; Step 6-2: Use a level to measure the height difference between the separation rail and the skid body, and use a U-shaped clamp and a pad to adjust the separation rail to the required levelness of the separation rail; Step 6-3: Select 5-8 measuring points in the length direction of the symmetrical positions of the two separation slide rails, and use a laser tracker and a separation slide rail gauge to measure the deviation between the center line of the two separation slide rails and the measurement reference at each point. When the deviation is greater than emm, use the top screw bolt on the process positioning block to adjust the deviation of the center line of the separation slide rail until it meets the requirement; Step 7: Final assembly welding; The assembly welding is carried out by sequential layered welding from the middle to both ends, and the welding deformation is controlled during the welding process; Step 8: Re-inspect after welding; Conduct measurement recheck to confirm that the deviation does not exceed fmm; Step 9: Overall finishing; After the final assembly re-inspection is completed, the upper plane of the separation slide rail is fine-machined on the gantry milling machine with the lower plane of the upper slider of the rocket sled test separation shoe as the reference; the side of the separation slide rail is fine-machined with the center line of the left and right separation shoes of the rocket sled test as the reference; finally, the machine tool is used to ensure that the straightness of the separation slide rail is ≯gmm.

2. A method for controlling the straightness of a slide rail suitable for sliding separation of a rocket sled according to claim 1, characterized in that: In step 5, five pairs of positioning blocks are processed at symmetrical positions on both sides of each rail, and the positioning blocks are provided with adjusting screw bolts.

3. A method for controlling the straightness of a slide rail suitable for sliding separation of a rocket sled according to claim 1, characterized in that: Said a=1, b=3, c=0.5, d=1, e=0.2, f=1, g=0.

5.

4. The method for controlling the straightness of a slide rail suitable for sliding separation of a rocket sled according to claim 1, characterized in that: The stress relief annealing temperature is 200°C.

5. A computer program, characterized in that The computer program enables a computer to execute the method according to any one of claims 1 to 4.

6. An electronic device, characterized in that: include: Processor and memory; The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the method as claimed in any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

8. A chip, characterized in that: include: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 4.

9. A computer program product, characterized in that The computer program product comprises a computer storage medium storing a computer program, wherein the computer program comprises instructions executable by at least one processor, and when the instructions are executed by the at least one processor, the method according to any one of claims 1 to 4 is implemented.