Coil combination foaming auxiliary tool
By designing the expansion shaft tooling and expansion sleeve, the problems of uneven density and deformation during the coil assembly foaming process were solved, achieving efficient and uniform foaming effect, and improving the foaming qualification rate and product consistency.
Patent Information
- Application Number
- CN202423050725.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-10
AI Technical Summary
In the existing foaming process of coil assembly, the material is easily affected by thermal expansion and contraction, resulting in uneven density, deformation and bulging after foaming, and uneven distribution of foaming material, which leads to high scrap rate and difficulties in development progress.
The expansion shaft tooling and expansion sleeve are used together. The expansion sleeve fits tightly with the inner cavity of the large frame. Combined with the foaming mold, the foaming material is fixed to ensure uniform force and prevent deformation. The gap design prevents the expansion sleeve from breaking, thus achieving uniform foaming.
This improved the foaming success rate to 100%, ensuring product consistency and pass rate, reducing scrap rate, and enabling mass production.
Smart Images
Figure CN223671676U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to space device assembly auxiliary tool technical field especially relates to a wire package combination foaming auxiliary frock. BACKGROUND
[0002] The development and production of space launching device is one of the key projects of space factory, and is an important component of the independent production of new products of the factory. In the development process of the launching device, the foaming process has an important influence on the electrical performance of the wire package combination. Therefore, the wire package combination foaming process technology of the cylindrical component is the key of the development work. The current foaming method is chemical foaming method, which uses chemical method to produce gas to make plastic foam. This method uses isocyanate, polyether, ammonia ether, alkali-free glass fiber and quartz sand for mixing and stirring. The gas released by the chemical reaction between the plastic components is used for foaming. Similar to the general injection molding process, the heating, mixing, plasticizing and most of the foaming expansion of the plastic are completed in the injection molding machine. Therefore, no matter which kind of plastic raw material, the foaming process generally needs to go through the stages of forming bubble nucleus, bubble nucleus expansion, bubble solidification and setting.
[0003] The wire package combination is a hollow cylindrical structure made of nylon material, including a large skeleton, a coil and a wire harness. In the wire package combination foaming process, the material and structure of the wire package combination are easily affected by thermal expansion and cold contraction. The material required for foaming generates high temperature and pressure in the chemical reaction process, so that the existing wire package combination shell cannot uniformly distribute the foaming material in each part, which easily leads to the problems of uneven density of the foaming material in the wire package combination, insufficient strength of some parts after foaming, uneven pressure generated by foaming, high temperature, expansion and extrusion, uneven stress on the inner cavity of the large skeleton, deformation and bulging phenomenon, and poor consistency of the dimensions of the inner cavity of the large skeleton before and after foaming, resulting in a waste product rate of 90% and a very low success rate in the early development of the launching device.
[0004] At the same time, since the pouring operation of the wire package combination foaming is manually operated, and the chemical reaction of the foaming material is fast and the solidification time is short, the inaccuracy of the process steps may cause the chemical reaction and solidification of the foaming material to be completed before the pouring is completed, resulting in foaming failure. The natural chemical reaction of the foaming material may also expand and solidify outward, causing the foaming material in the wire package combination shell to not uniformly fill the entire shell cavity, resulting in inconsistent pressure in the cavity and deformation of the cavity, which causes waste products.
[0005] According to the deformation of the inner cavity of the large skeleton of the wire package combination, five foamed large skeletons were detected, and the detection results are shown in Table 1.
[0006]
[0007] Therefore, under the existing foaming process, the detection results are all unqualified. Since the wire package combined foaming is a one-time product assembly, if the large skeleton inner cavity bulges and deforms, the product cannot be repaired, resulting in unqualified products, which will cause serious loss to the factory and affect the development progress. The foaming problem has been the focus and difficulty of the development of the launching device for a long time, and is the bottleneck of the future phase transition, which needs to be solved as soon as possible. SUMMARY
[0008] The utility model discloses a wire package combined foaming auxiliary tool which can keep the large skeleton inner cavity from bulging and deforming and has a high foaming success rate, to overcome the deficiencies of the prior art.
[0009] The utility model discloses the technical scheme that adopts: a wire package combined foaming auxiliary tool, the wire package combination includes large skeleton and the wire package that winds on large skeleton, the auxiliary tool includes expansion shaft tool, expansion sleeve and foaming mould, the expansion sleeve is covered in expansion shaft tool, and expansion shaft tool front and expansion sleeve enter large skeleton inner cavity, and expansion shaft tool can open expansion sleeve, and expansion shaft tool is tight to large skeleton and starts to wind the wire package, and the foaming mould is located wire package outside, and the foaming mould is filled with foaming material.
[0010] Further technical scheme is: expansion shaft tool includes expansion shaft, pressure rod, hand wheel, sleeve, pressure rod, pressure block, taper block I, connecting rod and taper block II;
[0011] Expansion shaft is multilobed hollow cylindrical structure, the pressure rod front end is engaged with the pressure rod rear end, and the pressure rod is the sleeve structure, and the front end is inserted into the expansion shaft and is connected with the connecting rod, and the other end of the connecting rod is connected with the taper block II, and the connecting rod and the taper block II are arranged in the expansion shaft, the hand wheel is covered outside the pressure rod and is connected with the pressure rod through screw thread, the front end of the hand wheel is connected with the sleeve, the sleeve is covered outside the pressure rod and the pressure rod, and the front end is inserted into the expansion shaft, and the pressure block and the taper block I are arranged between the front end of the sleeve, the pressure rod and the expansion shaft, the internal space of the expansion shaft is consistent with the shape of the internal parts, and the expansion sleeve is covered outside the expansion shaft during foaming.
[0012] Further, a plurality of slits are uniformly arranged on the expansion sleeve, a circular hole is arranged at the root of the slits to form a recessed step, and the expansion sleeve has a front thin and rear thick shape.
[0013] Further, the foaming mould includes a left half mould, a right half mould and an upper mould, the left half mould and the right half mould are connected and covered outside the wire package, the upper mould is covered on the large skeleton and is connected with the left half mould and the right half mould, and a filling port is arranged on the left half mould.
[0014] Further, a clamp is arranged outside the expansion shaft.
[0015] Further, a gasket is arranged between the pressure block and the taper block I.
[0016] Further, the hand wheel and the sleeve are connected and fixed by pin I, and the connecting rod and the taper block II are connected and fixed by pin II.
[0017] By adopting the technical scheme, the wire package combined foaming auxiliary tool has the following beneficial effects:
[0018] 1. The expansion sleeve is used in cooperation with the expansion shaft tool to support the inner cavity of the large framework, the inner cavity of the large framework is uniformly expanded, the expansion sleeve is in full contact with the inner cavity of the large framework, and the expansion sleeve is tightly attached to the inner cavity of the large framework without any gap. The force on each part of the inner cavity of the large framework is uniform, the high temperature and expansion generated in the foaming process are prevented from causing the inner cavity of the large framework to deform and bulge, the consistency of each dimension of the inner cavity of the large framework before and after foaming is ensured, the product assisted by foaming meets the requirements of various indexes after detection, and the one-time success rate of product assembly is increased from 10% to 100%, the qualified rate of wire package combined foaming is greatly improved, the foaming bottleneck is solved, and the purpose of batch production is finally achieved.
[0019] 2. The expansion sleeve is provided with a plurality of gaps, the expansion sleeve can be tightly attached to the inner cavity of the large framework after the expansion shaft tool expands the expansion sleeve, the force on the inner cavity of the large framework under the high temperature and pressure generated by the foaming material is uniform, and the inner cavity of the large framework will not deform and bulge. Circular holes are arranged at the root of the gap, the phenomenon that the root of the gap of the expansion sleeve is broken when the expansion sleeve is expanded is effectively prevented, the elasticity of the expansion arc is increased, and the contact surface of the expansion arc and the large framework can be tightly attached.
[0020] 3. The left half mold, the right half mold and the upper mold are arranged to pour the foaming material, are used for mold opening injection molding and fixing forming, improve the stability and consistency of each product, can be repeatedly used, reduce the cost, and are economical and practical.
[0021] The technical features of the wire package combined foaming auxiliary tool will be further described in combination with the drawings and the embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is a structure schematic view of the assembly process of the wire package combined foaming auxiliary tool.
[0023] Figure 2 It is a structure schematic view of the assembly process of the wire package combined foaming auxiliary tool.
[0024] Figure 3 It is a structure schematic view of the assembly process of the wire package combined foaming auxiliary tool. Figure 2 It is a side view of the wire package combined foaming auxiliary tool.
[0025] Figure 4 It is a structure schematic view of the expansion shaft tool.
[0026] Figure 5 It is a structure schematic view of the expansion shaft tool.
[0027] Figure 6 For Figure 5 side view;
[0028] Figure 7 For the pressure rod structure of the utility model schematic diagram;
[0029] Figures 8-9 For the hand wheel structure schematic diagram of the utility model;
[0030] Figure 10 For the sleeve structure schematic diagram of the utility model;
[0031] Figure 11 For the pressure rod structure schematic diagram of the utility model;
[0032] Figures 12-13 For the connecting rod structure schematic diagram of the utility model;
[0033] Figure 14 For the taper block I structure schematic diagram of the utility model;
[0034] Figure 15 For the taper block II structure schematic diagram of the utility model;
[0035] Figure 16 For the pressure block structure schematic diagram of the utility model;
[0036] Figure 17 For the gasket structure schematic diagram of the utility model;
[0037] Figure 18 For the clamp structure schematic diagram of the utility model;
[0038] Figure 19 For the sleeve structure schematic diagram of the utility model.
[0039] In the figure:
[0040] 1-expansion shaft tool, 101-pressure rod, 102-hand wheel, 103-pin I, 104-sleeve, 105-pressure rod, 106-pressure block, 107-taper block I, 108-expansion shaft, 109-connecting rod, 110-pin II, 111-taper block II, 112-clamp, 113-gasket;
[0041] 2-sleeve, 21-round hole, 22-gap;
[0042] 3-wire package combination, 31-wire package, 32-large framework;
[0043] 4-foaming mold, 41-screw plug, 42-sealing port, 43-left half mold, 44-upper mold, 45-right half mold, 46-fixing screw. DETAILED DESCRIPTION
[0044] Example 1
[0045] A type of auxiliary tooling for foaming coil assembly, such as Figures 1-3 As shown, the coil assembly 3 includes a large frame 32 and a coil 31 wound on the large frame. The auxiliary tooling includes an expansion shaft tooling 1, an expansion sleeve 2, and a foaming mold 4. The expansion sleeve 2 is fitted outside the expansion shaft tooling 1. The front part of the expansion shaft tooling 1 and the expansion sleeve 2 extend into the inner cavity of the large frame 32. The expansion shaft tooling 1 can open the expansion sleeve 2 and tighten the large frame 32 at the coil. The foaming mold 4 is located outside the coil 31, and foaming material is poured into the foaming mold 4.
[0046] like Figures 4-18 As shown, the expansion shaft fixture 1 includes an expansion shaft 108, a pressure rod 101, a handwheel 102, a sleeve 104, a clamping rod 105, a pressure block 106, a cone block I 107, a connecting rod 109, and a cone block II 111. The expansion shaft 108 is a six-lobed hollow cylindrical structure. The pressure rod 101 is screw-shaped, with a trapezoidal slot at its front end that engages with a trapezoidal notch at the rear end of the clamping rod 105. The clamping rod 105 is a sleeve structure, with the rear rod fitting around the front rod, allowing the rear rod to extend and retract relative to the front rod. The clamping rod 105 extends into the expansion shaft 108. The front rod of the clamping rod is connected to the connecting rod 109, and the other end of the connecting rod 109 is connected to the cone block II 111 via a pin II 110. The connecting rod 109 and the cone block II 111... All components are located inside the expansion shaft 108. The handwheel 102 is sleeved outside the pressure rod 101 and threadedly connected to the pressure rod 101. The front end of the handwheel 102 is connected to the sleeve 104 through pin I 103. The sleeve 104 is sleeved outside the pressure rod 101 and the clamping rod 105, and its front end extends into the expansion shaft 108. The front end of the sleeve 104 is connected to the pressure block 106. The pressure block 106 has a gasket 113 at its front end and a cone block I 107 at its rear end. The pressure block 106 and the cone block I 107 are located between the clamping rod 105 and the expansion shaft 108 and are sleeved on the clamping rod 105. The hollow interior of the expansion shaft 108 matches the cone shape of the cone block and the column shape of the pressure block. The expansion shaft 108 is provided with a clamp 112. During foaming, the expansion sleeve 2 is sleeved outside the expansion shaft 108.
[0047] like Figure 19As shown, the expansion sleeve 2 is 45# steel, heat treated HRC 28-32, six evenly distributed slits 22 on the expansion sleeve 2, 94mm long and 1mm wide, i.e. a slit is provided at every 60 degree position, so that after the expansion sleeve is expanded by the expansion shaft, the expansion sleeve can closely fit the inner cavity of the large skeleton, ensuring that the inner cavity of the large skeleton is uniformly stressed under the high temperature and pressure generated by the foaming material, and will not bulge or deform; the root of the slit 22 is provided with a φ6 round hole 21 to form a recessed step, which can effectively prevent the root of the slit of the expansion sleeve from breaking when it is expanded, and at the same time increases the elasticity of the expansion arc, so that the contact surface of the arc and the large skeleton can closely fit; the expansion sleeve 2 is thin in front and thick in back, i.e. the thickness of the expansion sleeve is reduced by 1.5mm at the front end of the expansion sleeve, so that the expansion sleeve can accommodate the position of the retaining ring in the inner cavity of the large skeleton after being placed in the inner cavity of the large skeleton.
[0048] As shown in Figure 2 As shown, the foaming mold 4 includes a left half mold 43, a right half mold 45, and an upper mold 44, the left half mold 43 and the right half mold 45 are connected to the wire package 31 by a fixing screw 46, and the upper mold 44 is connected to the left half mold 43 and the right half mold 45 by being sleeved on the large skeleton 32, the left half mold 43 is provided with a pouring port 42, and the pouring port 42 is provided with a screw plug 41, in use, the foaming material is injected from the pouring port 42, so that the foaming material is solidified in the foaming mold 4 to form a tissue structure for protecting the wire package 31.
[0049] The use principle of the expansion shaft is as follows: the pressure rod 101 is kept fixed, the hand wheel 102 is rotated, the pressure block 106 is driven by the sleeve 104 to move along the axial direction relative to the pressure rod 105, the taper block I 107 is forced to approach the taper block II 111, and the multi-petal structure of the expansion shaft 108 is expanded along the radial direction through the taper structure of the taper block I 107, so as to expand the expansion sleeve 2 until the expansion sleeve 2 closely fits the inner cavity of the large skeleton cylinder, and the expansion effect is achieved.
[0050] Due to the use of the expansion shaft tool and the expansion sleeve, under the combined action of the uniform distribution of the expansion force of the expansion shaft tool and the expansion sleeve, the bulging and deformation caused by the high temperature and expansion during the foaming process of the foaming material are effectively resisted, so that qualified products are foamed, the design of the expansion shaft tool and the expansion sleeve plays a key role in keeping the inner cavity of the large skeleton from deforming, and the foaming bottleneck is solved.
[0051] After the wire package combined foaming auxiliary tool is used, the deformation of five foamed large skeletons is detected, and the detection results are shown in the following table 2.
[0052]
[0053] From table 1 and table 2, it can be seen that after using the wire package combined foaming auxiliary tool, the inner cavity of the large framework has no bulge and deformation phenomenon, the inner diameter size meets the technical requirements, and after the test, the relevant detection is carried out, the insulation resistance and electrical performance meet the technical requirements, and the foaming effect is good.
[0054] Example two
[0055] A wire package combined foaming process, which is foamed by using the wire package combined foaming auxiliary tool of example one, and the specific steps are:
[0056] (1) Prepare the foaming material and required instruments and equipment, and operate in the dedicated foaming room according to the following process foaming method, the foaming material is JB-1 type hard polyester foam plastic A material, B material and C material, and the instruments and equipment are electronic scale and high temperature box;
[0057] (2) Put the expansion sleeve into the expansion shaft tool, and put it into the corresponding position of the starting wire package in the inner cavity of the large framework, rotate the hand wheel, expand the expansion shaft, and expand the expansion sleeve to expand and fix the inner cavity of the large framework;
[0058] (3) After completing the preparation work, pour the foaming material JB-1 type hard polyester foam plastic A material and C material into the beaker according to the weight ratio of 14g and 3.5g, and stir clockwise uniformly;
[0059] (4) Pour 16g or 17.5g or 19g of B material into the beaker containing A material and C material, and use the stirrer to stir the foaming material clockwise uniformly within 30s or 40s or 50s;
[0060] (5) Pour the prepared foaming material into the foaming mold of the wire package combination rapidly and uniformly within 4s or 5s or 6s, and plug the grouting hole with a screw plug, and stand for 3min to 5min;
[0061] (6) Put the wire package combination (without removing the expansion shaft) into which the foaming material has been poured into the 50±5℃ high temperature test box, set the temperature to 55℃, which is the best temperature for wire package combination foaming, which can effectively promote the chemical reaction between the foaming materials;
[0062] (7) After 1h or 2h or 3h of heat preservation, take out and cool to room temperature, take out the screw plug, and use a blade to clean the foaming flash of the wire package combination;
[0063] (8) Remove the expansion shaft tool, expansion sleeve and foaming mold;
[0064] (9) Foaming is completed.
[0065] Using the above wire package combination foaming process to carry out foaming, the following indexes can be reached after foaming: ① hardness: 60-70 (HD Shore); ② density: 45-60 kg / m³; ③ water absorption: less than 0.075 kg / m²; ④ flame retardant value: 2S; ⑤ compressive strength: greater than 200 Mpa, meeting the electrical and insulating performance of the assembly, and improving the foaming qualified rate.
[0066] The above embodiments are only preferred embodiments of the present application, and the structure of the present application is not limited to the forms listed in the above embodiments, and any modification, equivalent replacement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A wire package combination foaming auxiliary tool, the wire package combination (3) comprising a large framework (32) and a wire package (31) wound on the large framework, characterized in that: The auxiliary tool includes an expanding shaft tool (1), an expanding sleeve (2) and a foaming mold (4), the expanding sleeve (2) is sleeved outside the expanding shaft tool (1), the front part of the expanding shaft tool (1) and the expanding sleeve (2) extend into the inner cavity of the large frame (32), the expanding shaft tool (1) can expand the expanding sleeve (2) and expand the large frame (32) to form a winding position, the foaming mold (4) is arranged outside the winding (31), and the foaming mold (4) is filled with foaming material.
2. The wire package combination foaming assist tool according to claim 1, wherein: The expanding shaft tool (1) includes an expanding shaft (108), a pressing rod (101), a hand wheel (102), a sleeve (104), a pressing rod (105), a pressing block (106), a taper block I (107), a connecting rod (109) and a taper block II (111). The expanding shaft (108) is a multi-limb hollow cylindrical structure, the front end of the pressing rod (101) is clamped with the rear end of the pressing rod (105), the pressing rod (105) is a sleeve structure, the front end of the pressing rod (105) extends into the expanding shaft (108) and is connected with the connecting rod (109), the other end of the connecting rod (109) is connected with the taper block II (111), the connecting rod (109) and the taper block II (111) are arranged in the expanding shaft (108), the hand wheel (102) is sleeved outside the pressing rod (101) and is in threaded connection with the pressing rod (101), the front end of the hand wheel (102) is connected with the sleeve (104), the sleeve (104) is sleeved outside the pressing rod (101) and the pressing rod (105), and the front end of the sleeve (104) extends into the expanding shaft (108); the pressing block (106) and the taper block I (107) are arranged between the front end of the sleeve (104), the pressing rod (105) and the expanding shaft (108), the inner cavity of the expanding shaft (108) is matched with the shapes of the internal components, and the expanding sleeve (2) is sleeved outside the expanding shaft (108) during foaming.
3. The wire package combination foaming assist tool according to claim 1, characterized by: A plurality of slits (22) are uniformly arranged on the expanding sleeve (2), a circular hole (21) is arranged at the root of the slit (22) to form a recessed step, and the expanding sleeve (2) is thin in front and thick in back.
4. The wire package combination foaming assist tool according to claim 1, wherein: The foaming mold (4) includes a left half mold (43), a right half mold (45) and an upper mold (44), the left half mold (43) and the right half mold (45) are connected and sleeved outside the winding (31), the upper mold (44) is sleeved on the large frame (32) and is connected with the left half mold (43) and the right half mold (45), and the left half mold (43) is provided with a pouring port (42).
5. The wire package combination foaming assist tool according to claim 2, wherein: A clamp (112) is arranged outside the expanding shaft (108).
6. The wire package combination foaming assist tool according to claim 2, wherein: A gasket (113) is arranged between the pressing block (106) and the taper block I (107).
7. The wire package combination foaming assist tool according to claim 2, wherein: The hand wheel (102) and the sleeve (104) are fixedly connected through a pin I (103), and the connecting rod (109) and the taper block II (111) are fixedly connected through a pin II (110).