70results about How to "Solve warping deformation" patented technology

The invention discloses a diaphragm positioning structure and a backlight module thereof. The positioning structure is used for positioning a diaphragm, and at least one positioning hole is formed in the diaphragm. The diaphragm positioning structure further comprises a positioning framework provided with a first slope facing the diaphragm and a slide block. The slide block is located between the positioning framework and the diaphragm and is provided with a bottom face which contacts with the diaphragm, and a second slope which correspondingly contacts with the first slope. The obliquity of the second slope is gradually raised towards the direction of the outer edge of the diaphragm. A positioning protrusion corresponding to the positioning hole is arranged on the outer edge of the slide block, and the positioning protrusion is arranged in the positioning hole in a penetrating mode. By means of the mutual extrusion between the slope of the positioning frame and the slope of the slide block in the diaphragm positioning structure, the slide block moves towards the outer side of the diaphragm, and the positioning protrusion is used for hanging the positioning hole to exert an outward tensile stress on the diaphragm to tension the diaphragm,. The invention further provides another connecting structure of the slide block and the positioning frame. Through utilization of the slide block to exert the tensile stress on the diaphragm, the harmomegathus quantity of the diaphragm due to temperature change can be adjusted to solve the problem of warping of the diaphragm.

The invention discloses an automatic packaging line finished product whole box automatic turning machine which comprises a horizontal fixed beam. A left lifting rod and a right lifting rod are vertically arranged at the two ends of the fixed beam downwards. A left shoe block and a right shoe block are symmetrically and fixedly arranged at the lower end of the left lifting rod and the lower end of the right lifting rod. A driving rotating disc driven by a drive motor to rotate is arranged on the inner side of the left shoe block. A driven rotating disc driven by a telescopic cylinder to move forwards and backwards is arranged on the inner side of the right shoe block. The position of the driven rotating disc corresponds to the position of the driving rotating disc. The invention further discloses a method for turning finished product box bodies through the automatic turning machine. The automatic turning machine is simple in structure and convenient to use, the problem that top layer box covers are warped up and deform after the finished product box bodies conveyed out of an automatic packaging production line of a workshop are stacked can be fundamentally solved, and the design defects of the automatic packaging production line are overcome. Meanwhile, operation is easy, a control device can selectively turn the box bodies placed on the uppermost layer of a stack according to a set value of a counter, and the work requirements of the high-speed packaging line are completely met.

The invention relates to a SiC ceramic thin-layer bullet-resistant material for a laminated armor and a preparation method of the SiC ceramic thin-layer bullet-resistant material. The SiC ceramic thin-layer bullet-resistant material is a gel-casting sheet prepared from the following raw materials: silicon carbide micro powder, boron carbide micro powder, acrylamide monomer, N'N-methylene bisacrylamide, tetramethyl ammonium hydroxide, tributyl phosphate, deionized water and ammonium persulfate. The invention also provides the preparation method of the SiC ceramic thin-layer bullet-resistant material. According to the SiC ceramic thin-layer bullet-resistant material, a silicon carbide ceramic sheet which is large in size, compact and smooth can be prepared; the SiC ceramic thin-layer bullet-resistant material is adjustable in size, good in hardness and good in fracture toughness, and is high in protective capability as a bullet-resistant material for the laminated armor.

The invention discloses a heat radiating process method for a printed-circuit board, belongs to electron technology, and applies to the technical field of avionics. The a cold plate is bonded on a printed-circuit board through a dedicated bonding device, a component is enabled to grovel on the cold plate, and heat radiating is carried out through the bonding membrane material and the cold plate, wherein the membrane material is arranged among the printed-circuit board base materials, the metal conducting materials on the inner portion and the surface of the printed-circuit board, the printed-circuit board and the cold plate. The cold plate is formed by arranging holes in an aluminium alloy plate according to the welding locating of the components of the printed-circuit board through hard anodic oxidation surface treatment. The bonding material between the printed-circuit board and the cold plate is a polyimide double-faced adhesive membrane. The bonding device is a convex thick steel mold plate and a concave thick steel mold plate with a certain curvature, and enables the printed-circuit board and the cold plate can be completed a flattening function simultaneously with bonding. The heat radiating process method for the printed-circuit board achieves the processing of the bonding and the flattening of the cold plate and the printed-circuit board at one time, solves the problem of product performance deterioration due to the fact that heat emitted by component after being powered on can not be released in time, increases the mechanical strength, the antiseptic property and the insulating property of the printed-circuit board, and restrains the layer splitting and the deformation of the printed-circuit board generated by high-temperature wave soldering.

The present invention relates to a wheel-like braking disc production method and a wheel-like braking disc produced by using the wheel-like braking disc production method. According to the present invention, during the wheel-like braking disc casting process, an integral and annular rib plate is additionally arranged on the heat dissipation rib top surface of the heat dissipation surface of a braking disc, the annular rib plate and the braking disc are subjected to one casting molding, and the heat dissipation rib top surfaces are connected one by one to form a stable annular frame structure with double rings arranged on the upper surface and the lower surface; during the cooling solidification process after the casting, the annular rib plate on the heat dissipation rib top surface is firstly solidified so as to fix a heat dissipation rib, such that the shrinkage is significantly uniform when the cast is cooled, and the warping deformation generated due to the asymmetric geometrical size of the cast can be avoided; the machining allowance top surface of the friction surface of the braking disc is designed into to a tapered surface so as to increase the cast deformation resistance and make the cast maintain the stabilized shrinkage; and after the cooling molding, the annular rib plate is removed through the machining and the machining allowance top surface of the friction surface is processed into the plane, such that the cast structure shape is not affected, and the product dynamic balance detection qualification rate is substantially improved.

The invention relates to a technical method for controlling warping deformation of an aluminum alloy thin-wall part in the 3D printing process. By designing a novel technical support, the plane in theforming direction (Z direction) serves as a mirror face, a mirror body of a part is generated, the section of the mirror body and the part on a forming face (XOY face) forms a closed structure, the gap between the part and the mirror body is 3-5 mm and is filled with a Z-shaped sheet (the wall thickness is the same with that of the part) or a hollowed-out grid structure, the part is connected with the mirror body, a supporting structure is removed through linear cutting, and a printing part is obtained. According to the technical method, the effect that the thin-wall part is free of warping deformation in the printing process can be ensured, in addition, the support quantity is not increased, the post-processing cost is reduced, and the printing success rate and quality of the thin-wall part are improved. Thus, the technical method has the important significances to improvement of the quality and success rate of the same kind of thin-wall parts.

The invention discloses an accurate machining method for a complex thin-wall variable-thickness large covering cap. The accurate machining method for the complex thin-wall variable-thickness large covering cap comprises the following steps: simulating and flattening according to the geometrical parameters of the large covering cap, and calculating the smallest blank; designing and producing a concave-convex fixture die needed for hot-pressing forming according to the specific structure and dimensions of the large covering cap; carrying out the hot-pressing forming on the large covering cap bymeans of die-assembly hot-pressing forming; carrying out corrosion machining on a weight-reducing cavity in the internal profile of the large covering cap by means of chemical milling; designing and producing a follow-up fixture needed for machining for the large covering cap according to the specific structure and dimensions of the large covering cap; clamping and fixing the large covering cap through the follow-up fixture, filling a gap between the large covering cap and the fixture by virtue of solid paraffin, and integrally bonding the large covering cap with the fixture; and carrying outfinish machining forming on the large covering cap through a five-axis numerically-controlled machining center. According to the accurate machining method for the complex thin-wall variable-thicknesslarge covering cap, the vibration and deformation of a large-dimension thin-wall part in the machining process are effectively controlled and reduced, and the profile and dimension accuracy of the large covering cap are obviously improved.

The invention provides a heat treatment method for correcting the plane warping deformation of an injection molded product and belongs to the technical field of injection molding. A correcting tool isdivided into three parts including a U-shaped correcting support frame, a regulating block and a pressure application block. The heat treatment method comprises the steps: placing the regulating block in the middle of the U-shaped correcting support frame, placing a corrected injection molded product above the regulating block and the U-shaped correcting support frame, and mounting the pressure application block above the corrected injection molded product; then, placing a combined body into a drying oven or completing the combination in the drying oven, carrying out heat insulation, meanwhile, keeping a drying environment, setting the temperature of the drying oven to be 10-20 DEG C lower than the glass transition temperature of the material of the injection molded product, keeping the temperature for 1-2 h, and then, taking out and separating each part; and cooling a to-be-corrected injection molded product to the room temperature, and repeating the process once or twice. Accordingto the heat treatment method, a plastic product is subjected to heat treatment, and the internal stress of the plastic product is firstly released under the assistance of correcting measures, so thatthe problem of injection molding plane warping deformation is effectively solved.

The invention relates to a ring-beam reinforcing connection structure and a ring-beam construction method. The ring-beam reinforcing connection structure comprises a ring-beam reinforcing cage, beam column reinforcing ribs and floor reinforcing ribs. The ring-beam reinforcing cage comprises an inner ring beam, an outer ring beam, annular beams and longitudinal beam ribs, and the ring-beam beams and the longitudinal beam ribs are different in diameter and are arranged between the inner ring beam and the outer ring beam. The longitudinal beam ribs are connected with the inner ring beam, the outer ring beam and the annular beams in an enclosed manner to form an annular cylindrical structure. The beam column reinforcing ribs are penetratingly arranged in the cavity of the ring-beam reinforcing cage and connected with the same. The floor reinforcing ribs include first beam reinforcing ribs and second beam reinforcing ribs, the first reinforcing ribs penetrate the ring-beam reinforcing cage and are connected with the same, the second beam reinforcing ribs are penetratingly arranged in the ring-beam reinforcing cage, the ends of the second beam reinforcing ribs are located inside the ring-beam reinforcing cage and are connected with the same. By the adoption of the ring-beam reinforcing cage, the problem about buckling deformation produced in construction of ring beams is solved, and connection strength between beam columns and floors can be guaranteed.

The invention discloses a high-rigidity, high-toughness and high-fluidity polypropylene composite material and a preparation method thereof. The polypropylene composite material is composed of the following raw materials in percentage by mass: 52-71.2% of polypropylene, 20-30% of an inorganic filler, 8-15% of a toughening agent, 0.2-1% of a lubricant, 0.4-1% of an antioxidant, and 0.2-1% of a nucleating agent. The polypropylene composite material has the advantages that the prepared polypropylene composite material has the characteristics of high modulus, high impact resistance and high flowability; the polypropylene composite material meets the requirements of thin-walled materials for vehicles, can reduce the mass of the whole vehicle and achieve the effect of light weight, can achieve more ideal rigidity and toughness balance compared with traditional polypropylene, and is simple in preparation process, low in cost and easy for large-scale industrial production.

Rapid forming equipment in the prior art needs to be additionally provided with a forming chamber so as to provide an environmental temperature for preventing over-fast temperature reduction speed of forming materials; therefore causing the defects of complex rapid forming equipment and hardly observed forming process as well as various problems generated in real time due to unable timely processing caused by the defects of complex rapid forming equipment and hardly observed forming process. The invention provides a rapid forming working platform, which comprises a support device and a heating device. The upper surface of the support device comprises a support surface used for supporting a forming piece; the heating device is used for heating the support device so as to improve an environmental temperature for squeezed forming materials. The working platform is a self-heated open type working platform and is provided with the heating device for guaranteeing the environmental temperature of the forming materials. When the working platform is adopted, a forming chamber is not needed; therefore, the material forming process is completely visible so that various problems generated in real time can be timely processed.

The invention relates to a shading warping-resistant polyester material for 3D printing and a preparation method thereof. The preparation method comprises the following steps: drying matrix resin in adrying oven; putting the dried matrix resin into a high-speed mixer for stirring and mixing; adding diffusion oil and a coupling agent, and mixing the mixture at a high speed; adding the toughening agent, an inorganic filler, an opacifying agent, an antioxidant, a lubricating agent and an anti-UV agent, and uniformly mixing the mixture; adding the mixed materials into a double-screw extruder forextrusion and granulation to obtain particles; putting the particles into an airflow dryer for drying; and putting the dried particles into a single-screw extruder to extrude a melt, cooling, preparing a wire rod under the traction action of a traction machine, and winding the wire rod to obtain the shading warping-resistant polyester material for 3D printing. The polyester material has good mechanical properties and heat resistance, and has good warping resistance and shading performance.

The invention discloses a surface installation module which comprises a process edge, a circuit board, a plurality of bonding pad groups, a plurality of first reinforcing rib groups and a plurality of second reinforcing rib groups, wherein the circuit board is positioned in the process edge, and a hollow area is arranged between the circuit board and the process edge; the bonding pad groups are arranged at the edge of the circuit board; the first reinforcing rib groups are spaced with the bonding pad groups and connected between the process edge and the circuit board; and the second reinforcing rib groups correspond to the bonding pad groups and are connected between the process edge and the circuit board. Accordingly, the connection between the circuit board and the process edge is realized by two kinds of reinforcing rib groups so that the circuit board is provided with more warping resistant stress points, thereby improving the warping resistant design of the circuit board in a lower-cost and convenient way and effectively solving the problem of warping deformation of the circuit board.

The invention relates to the technical field of absorbable biological materials and medical devices, in particular to a hernia patch fixing nail. The hernia patch fixing nail is obtained through injection molding of an absorbable biological material, the absorbable biological material is a blend formed by a composition of a heterogeneous polymer, the blend comprises, by molar ratio, 70-90% of lactide and 30-10% of glycolide; the preparation method of the hernia patch fixing nail comprises the steps that a general molecular weight and low molecular weight of rich lactide and rich glycolide arefirstly prepared, then melt mixing, dyeing, prilling, drying, injection molding and annealing are carried out in sequence to obtain the fixing nail. The prepared fixing nail has excellent comprehensive properties such as high strength, good toughness, strong resistance to heat deformation and high dimensional stability in the early stage and the initial stage of application; degradation is in a continuous state when carried out, the polymer is significantly degraded in an important period of internal tissue recovery and adjustment and is basically absorbed by the human body within 10-20 months; mixing is simple and the synthesis cost is low.

The invention discloses a punching method for a high-density stainless steel mesh plate. Holes to be punched are divided into different parts according to the spacing and the holes in different parts are processed sequentially. The problems of sheet warping deformation and penetration of adjacent holes caused by sequential and one-by-one processing of the adjacent holes in the traditional process can be solved.

The invention belongs to the technical field of aerospace manufacturing, and discloses a method for preventing a 3D printing model from warping in FDM (Fused Deposition Modeling) printing. The methodcomprises the steps of (1) determining the bottom surface of the 3D printing model, wherein the bottom surface of the 3D printing model expresses the surface, which is printed first to make contact with a hot bed platform, in all surfaces of the 3D printing model; (2) uniformly applying anti-warping glue to the hot bed platform; (3) setting the temperature of the hot bed platform and printing parameters of a printer; and (4) printing the 3D printing model according to the printing parameters of the printer. The warping deformation of a 3D printed piece can be effectively solved, and the successful printing of a 3D product is guaranteed.

The invention belongs to the field of heat conduction materials, and particularly relates to a three-layer structure heat conduction powder for SLS and a preparation and use method thereof. According to the invention, enough amino sites are prepared in a manner of firstly preparing a grafting layer on a spherical heat-conducting powder material, and then a PA12 layer is prepared at the periphery of the grafting layer in a polymerization manner, so that the powder with a three-layer structure is obtained, as shown in Figure 1. The powder can be used for preparing a heat conduction structural part rough blank through SLS printing, and then the heat conduction structural part is prepared in a sintering mode. The problem that conventional mixed powder cannot be completely and uniformly mixed is solved, the problem that buckling deformation is easily caused by uneven heating, too fast cooling and the like when a heat conducting sheet is prepared from conventional heat conducting powder SLS is also solved, and meanwhile the beneficial effects of being smooth in powder laying, sufficient in contact, convenient in SLS printing and the like are further achieved. And the prepared heat conduction part has outstanding heat conduction performance and excellent mechanical performance.