Spacecraft strap strain gauge pasting auxiliary device and pasting method

Abstract

A spacecraft band strain gauge pasting auxiliary device and pasting method, comprising: a base for parking the band, the upper surface of the base being provided with a plurality of strain gauge avoiding grooves for avoiding the completed strain gauge from being pressed when the other side of the band is turned over for implementation, the lower surface of the base being flat; the base is further provided with an auxiliary tool positioning groove for use in cooperation with the auxiliary tool to determine the polishing position and the area scribing position; the auxiliary tool is shaped to cooperate with the auxiliary tool positioning groove to achieve positioning, and is provided with a structure for determining the polishing position or the area scribing position. Using the scheme, the band strain gauge pasting work can be efficiently and accurately completed.

Description

Technical Field

[0001] This invention belongs to the field of spacecraft overall assembly, and specifically relates to a spacecraft strap strain gauge pasting auxiliary device and pasting method. Background Technology

[0002] The "encased satellite-rocket connection and separation device" is a general term for the encased satellite-rocket connection and unlocking device (hereinafter referred to as "encased tape") and the separation spring assembly. It is commonly used for the connection, unlocking, and separation of satellites and launch vehicles. During satellite launch and powered flight, it ensures a reliable connection between the satellite and the rocket. After powered flight, it reliably unlocks and separates the satellite from the launch vehicle according to a predetermined procedure and provides an unlocking signal. The encased tape is the mechanism for connecting and unlocking the satellite and launch vehicle. Generally, two schemes can be selected: point connection or circumferential connection. The point connection unlocking device sets multiple pyrotechnic devices at the interface of the satellite-rocket connection structure, directly achieving the connection and unlocking function through the detonation of the pyrotechnic devices. The encased tape device mostly adopts a multi-segment encased tape, pyrotechnic devices, and clamping blocks to form a circumferential connection structure along the docking surface. During satellite-rocket separation, the pyrotechnic devices unlock and release the axial constraint of the encased tape and clamping blocks on the connection structure, achieving the unlocking function.

[0003] Strain gauges for spacecraft are important mechanical measurement components used in satellite-rocket unlocking devices. By firmly attaching the strain gauge to the measurement area on the strap, the stress state of the strap can be measured by the change in resistance of the sensitive grid material under strain when the strap is under stress. The accuracy of the measurement value directly affects the applicability of the pre-tightening force test of the satellite-rocket unlocking device, which is related to the successful separation of the satellite and rocket and directly affects the success or failure of the satellite launch.

[0004] The application of strain gauges with straps typically occurs before satellite mechanical testing and again before satellite launch. The strain gauge application process is shown in the figure. The main steps include preparation, grinding the application area for the strain gauges, marking the application area, applying the strain gauges, and processing the test leads.

[0005] The placement of the strain gauge wrapped with tape requires strict adherence; it must be centered in the width direction of the tape, and there are strict dimensional requirements in the length direction. For example... Figures 2-4 As shown, 12 strain gauges need to be attached to one strap (both sides of the strap need to be attached, and the attachment positions on the front and back sides correspond one-to-one). Figure 5 The area to be sanded before the strain gauge is attached is marked with sandpaper, and the location of the strain gauge to be attached is marked with a pencil.

[0006] The process of attaching strain gauges with straps involves many steps and positioning dimensions. During implementation, the strap body needs to be moved constantly. On the one hand, the overall work efficiency is low. On the other hand, the repeated movement of the straps poses a significant risk of impact to the strap body and the strain gauges already installed on it. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides an auxiliary device and method for attaching spacecraft wrapping strain gauges. The device includes a base and multiple accessory combinations, realizing a series of operational steps such as spacecraft wrapping placement and positioning, strain gauge grinding and positioning, and strain gauge marking and positioning. It replaces the current method of using a ruler to measure and mark lines, solves the problems of repeatedly moving the wrapping and cumbersome operation during the implementation process, and improves the implementation efficiency of a series of operations for attaching spacecraft wrapping strain gauges.

[0008] To achieve the above objectives, the present invention adopts the following solution:

[0009] This invention provides a spacecraft strap strain gauge bonding auxiliary device, comprising:

[0010] The base is used to hold the strapping tape. The upper surface of the base is distributed with several strain gauge clearance grooves to avoid the strain gauges on the strapping tape being squeezed when the other side is flipped after the strain gauges on one side have been applied. The lower surface of the base is flat. The base is also provided with auxiliary tooling positioning grooves, which are used in conjunction with auxiliary tooling to determine the grinding position and the area marking position.

[0011] The auxiliary tooling is shaped to fit the positioning groove of the auxiliary tooling to achieve positioning, and has a structure on it for determining the grinding position or the area marking position.

[0012] Furthermore, the base is provided with strap placement grooves near both ends, which match the outer envelope size of the strap in its free state, so that the strap can be placed snugly in the grooves.

[0013] Furthermore, the auxiliary tooling includes a grinding limiting tooling and a scribing limiting tooling, wherein:

[0014] The grinding limiting fixture has holes for positioning the grinding area; the scribing limiting fixture has grooves for scribing.

[0015] Furthermore, it also includes a filler sheet. When the strap without protrusions is placed on the base, the filler sheet is used to fill the strap placement slot before the strap is fitted and placed.

[0016] Furthermore, the base has a storage slot on its side for storing auxiliary tooling and other accessories.

[0017] Furthermore, it also includes a pressurizing device, which includes several gate-shaped pressurizing buckles. Limiting structures are provided at both ends of the pressurizing buckles so that the pressurizing buckles can cooperate with the receiving groove to apply a certain pressure to the strain gauge until the strain gauge adhesive is completely cured.

[0018] Furthermore, the base includes two specifications, which are respectively suitable for type 1194 tape and type 2334 tape, and the corresponding strain gauge clearance groove and auxiliary tooling positioning groove are adjusted accordingly.

[0019] Furthermore, the strain gauge has six clearance grooves.

[0020] The present invention also provides a method for attaching spacecraft wrapping strain gauges, based on the above-mentioned spacecraft wrapping strain gauge attachment auxiliary device, comprising the following steps:

[0021] 1) Place the base on a flat workbench, ensuring it is stable and does not wobble, and check that all accessories are complete;

[0022] 2) Place the strap with the bent protrusion side down in the strap groove of the base, check the tightness of the fit, and ensure that the strap does not move laterally;

[0023] 3) Place the grinding and limiting fixture in the grinding position positioning groove to determine the grinding area, and use sandpaper to grind the surface of the tape to be pasted as required;

[0024] 4) Remove the grinding limit fixture, place the scribing limit fixture in the scribing position positioning groove, and use a metal pencil to scribing the cross lines of the pasting position as required.

[0025] 5) Remove the marking and limiting fixture, and attach the strain gauges as required;

[0026] 6) Attach the pressurizing device to the base and apply pressure to the strain gauge. Continue pressurizing for approximately 4 hours.

[0027] 7) Remove the pressure device and take the strap off the base;

[0028] 8) Place the two filler plates into the grooves at both ends of the base, flip the strap so that the side without the strain gauge is facing up and the other side is in contact with the strap groove of the base.

[0029] 9) Repeat steps 3) to 6) to complete the grinding, marking, pasting and pressurizing of the strain gauge on the other bread.

[0030] 10) Remove the accessories and place them in the storage slot on the base.

[0031] The beneficial effects of this invention are:

[0032] When applied to the application of strain gauges with strapping, this invention allows multiple steps to be completed at once without moving the strapping, avoiding repeated movement of the strapping and making it convenient and quick to use. Attached Figure Description

[0033] Figure 1 Here is a flowchart illustrating the implementation process of the existing technology involving banded strain gauges;

[0034] Figure 2 This refers to the bonding position of the strain gauge in the existing technology;

[0035] Figure 3 The strain gauge number is used in the prior art (front side);

[0036] Figure 4 The strain gauge number is on the back side of the existing technology;

[0037] Figure 5 This is a schematic diagram of the existing technology for grinding and scribing packaging tape;

[0038] Figure 6 This is a schematic diagram of the base in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of the strap in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the filler sheet in an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of the grinding and limiting fixture in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the marking and limiting tooling in an embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of the pressurization device in an embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of the overall device in an embodiment of the present invention;

[0045] In the figure, 1-base, 2-filler, 3-wrapping tape body, 4-wrapping tape strain gauge, 5-grinding limit fixture, 6-scribing limit fixture, 7-pressurizing device. Detailed Implementation

[0046] To make the technical solutions and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be fully described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] like Figure 12 The present invention provides a spacecraft strapping strain gauge bonding auxiliary device, comprising a base 1, a filler 2, a strapping body 3, a strapping strain gauge 4, a grinding limiting fixture 5, a scribing limiting fixture 6, and a pressurizing device 7.

[0049] In some embodiments, such as Figure 6 This invention discloses a spacecraft strap strain gauge bonding auxiliary device, comprising a base for holding the strap. The base has six grooves to prevent compression of the strap when flipping it over after one side has been fitted with a strain gauge, thus avoiding compression of the fitted strain gauge. The lower surface of the base is flat, allowing it to be placed stably on a workbench. The base has strap placement grooves that match the outer envelope size of the strap in its free state. The base also has positioning grooves for grinding and scribing positions, used in conjunction with grinding and scribing positioning fixtures. A storage groove is provided on the side of the base to store accessories such as limiting fixtures, filler sheets, and pressurizing devices.

[0050] like Figure 7 As shown, the front and back of the bag strap differ slightly at the head position. Figure 7 In the view, the upper surface has a bent boss thickness. Therefore, strap placement slots are provided at both ends of the base to ensure a snug fit when the strap with the boss side is placed on the base; however, when the strap without the boss side is placed on the base, it needs to be positioned as follows: Figure 8 The filler sheet shown fills the slot for placing the strap before the strap is attached and placed.

[0051] The junction between the strap placement slot and the non-strap placement slot has a height difference equivalent to that of the aforementioned boss, ensuring that when the strap boss is placed downwards in the strap placement slot, it fits perfectly at the junction, making both sides flush. The thickness of the filler sheet is also equivalent to the thickness of the boss, so that when the filler sheet is added, the part where the strap is placed forms a smooth transition surface.

[0052] The base is equipped with positioning slots for grinding and scribing positions, which are used to determine the grinding position and area, and the scribing position, respectively. By placing the grinding or scribing limiting fixture into the positioning slots, the grinding area and scribing position can be provided conveniently and quickly.

[0053] Grinding limit fixtures such as Figure 9 As shown, it is placed in the groove on the base during use to position the grinding area. The scribing and limiting fixture is as follows... Figure 10 As shown, when in use, place it in the groove on the base (the same positioning groove as the grinding limit fixture) to position the scribing line. The scribing action can be completed using a marker pen on the bracket.

[0054] like Figure 11The auxiliary bonding device also provides a pressure device. After the strain gauge is bonded, the pressure device is fastened and a certain pressure is applied to the strain gauge until the strain gauge adhesive is completely cured (this process takes about 4 hours).

[0055] After the strain gauges on one side of the strap are pasted, the strap is flipped over and slowly placed on the strain gauge pasting aid. It is positioned by the strap placement slot. The above actions are repeated to complete the pasting of the strain gauges on the other side of the strap.

[0056] In some embodiments, the base can be divided into two specifications, respectively suitable for type 1194 and type 2334 strapping tapes, with corresponding adjustments to the strain gauge clearance groove, grinding position, and scribing position. Other accessories such as filler plates, limiting fixtures, and pressurizing devices are universal parts.

[0057] The present invention also provides a method for attaching strain gauges to spacecraft, comprising the following steps.

[0058] 1) First, place the base on a flat workbench to ensure that the base is stable and does not wobble, and check that the filling sheet, limit fixture and other accessories are complete.

[0059] 2) Place the strap with the bent protrusion side down in the strap groove of the base, check the tightness of the fit, and ensure that the strap does not move laterally;

[0060] 3) Place the grinding and limiting fixture in the grinding position positioning groove to determine the grinding area, and use sandpaper to grind the surface of the tape to be pasted as required;

[0061] 4) Remove the grinding limit fixture, place the scribing limit fixture in the scribing position positioning groove (the same positioning groove as the grinding limit fixture), and use a metal pencil to scribing the cross lines of the pasting position as required.

[0062] 5) Remove the marking and limiting fixture, and attach the strain gauges as required;

[0063] 6) Attach the pressurizing device to the buckle on the base and apply pressure to the strain gauge for approximately 4 hours;

[0064] 7) Remove the pressure device and take the strap off the base;

[0065] 8) Place the two filler plates into the grooves at both ends of the base, flip the strap so that the side without the strain gauge is facing up and the other side is in contact with the strap groove of the base.

[0066] 9) Repeat steps 3) to 6) to complete the grinding, marking, pasting, and pressurization of the strain gauge on the other bread.

[0067] 10) Remove the accessories and place them in the storage slot on the base.

[0068] This embodiment allows multiple operation steps to be completed at once without moving the strap, avoiding repeated moving of the strap, making it convenient and quick to use.

[0069] The specific effects are as follows:

[0070] 1) The strain gauge bonding auxiliary device is similar in shape to the strapping tape, both being long and narrow, which does not take up extra space and can be placed in the same packaging box as the strapping tape product, making it convenient for storage and transportation;

[0071] 2) The strap is fixed in place on the auxiliary device by a limiting groove. The strap has no free movement in the lateral direction, which ensures that the strap will not shift during the bonding strain process, ensures that the strap itself is not worn, and ensures the accuracy of the grinding and marking areas.

[0072] 3) The grinding limit fixture can be placed directly in the positioning slot of the auxiliary device to achieve the positioning of the grinding area. There is no need to use measuring tools to draw the grinding area in a time-consuming and laborious way, which saves time and effort.

[0073] 4) The scribing and limiting fixture can be placed directly in the positioning slot of the auxiliary device to achieve the positioning of the scribing position. The scribing work can be carried out by using a marker pen according to the slot on the scribing fixture, avoiding repeated measurement work and significantly improving the operation efficiency.

[0074] 5) Using the built-in pressurization device, the pressure can be applied after the strain gauge is pasted by simply snapping it on, ensuring that the adhesive cures stably.

[0075] In the description of this specification, references to terms such as "an embodiment" and "example" refer to specific features, structures, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms are not necessarily intended to refer to corresponding embodiments or examples in a suitable manner.

[0076] It must be pointed out that the above description of the embodiments is not intended to limit the invention but only to help understand the core idea of ​​the invention. For those skilled in the art, any improvements to the invention and equivalent alternatives made to the invention without departing from the principle of the invention are also within the scope of protection of the claims of the invention.

Claims

1. A spacecraft strap strain gauge bonding auxiliary device, characterized in that, include: The base is used to hold the strapping tape. The upper surface of the base is distributed with several strain gauge clearance grooves to avoid the strain gauges on the strapping tape being squeezed when the other side is flipped after the strain gauges on one side have been applied. The lower surface of the base is flat. The base is also provided with auxiliary tooling positioning grooves, which are used in conjunction with auxiliary tooling to determine the grinding position and the area marking position. An auxiliary tooling, the shape of which matches the positioning groove of the auxiliary tooling to achieve positioning, and has a structure on it for determining the grinding position or the area marking position; The base is provided with strap placement slots near both ends, which match the outer envelope size of the strap in its free state, so that the strap can be placed snugly in the slots; The auxiliary tooling includes a grinding limiting tooling and a scribing limiting tooling, wherein: The grinding limiting fixture has holes for positioning the grinding area; the scribing limiting fixture has grooves for scribing. It also includes a padding sheet. When the strap without protrusions is placed on the base, the padding sheet is used to fill the strap placement slot before the strap is fitted and placed. The base has a storage slot on its side for storing accessories for auxiliary tooling. It also includes a pressurizing device, which includes several gate-shaped pressurizing buckles. Limiting structures are provided at both ends of the pressurizing buckles so that the pressurizing buckles can cooperate with the storage groove to apply a certain pressure to the strain gauge until the strain gauge adhesive is completely cured. The strain gauge has 6 clearance grooves.

2. The spacecraft wrapping strain gauge bonding auxiliary device according to claim 1, characterized in that, The base includes two specifications, which are suitable for 1194 type strapping tape and 2334 type strapping tape respectively, and the corresponding strain gauge clearance groove and auxiliary tooling positioning groove are adjusted accordingly.

3. A method for attaching strain gauges to spacecraft casings, characterized in that, The spacecraft wrapping strain gauge bonding auxiliary device according to any one of claims 1-2 includes the following steps: 1) Place the base on a flat workbench, ensuring it is stable and does not wobble, and check that all accessories are complete; 2) Place the bag strap with the bent protrusion side down in the bag strap placement slot of the base, check the tightness of the fit, and ensure that the bag strap does not move laterally; 3) Place the grinding and limiting fixture in the grinding position positioning groove to determine the grinding area, and use sandpaper to grind the surface of the tape to be pasted as required; 4) Remove the grinding limit fixture, place the scribing limit fixture in the scribing position positioning groove, and use a metal pencil to scribing the cross-shaped lines of the pasting position as required. 5) Remove the marking and limiting fixture, and attach the strain gauges as required; 6) Attach the pressurizing device to the base and apply pressure to the strain gauge. Continue pressurizing for approximately 4 hours. 7) Remove the pressure device and take the strap off the base; 8) Place the two filler plates into the grooves at both ends of the base, flip the strap so that the side without the strain gauge is facing up and the other side is placed in the strap placement groove of the base. 9) Repeat steps 3) to 6) to complete the grinding, marking, pasting and pressurizing of the strain gauge on the other bread. 10) Remove the accessories and place them in the storage slot on the base.

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