32results about How to "Eliminate the effects of thermal deformation" patented technology

The invention provides a substrate-free pressure-sensitive acrylic thermal conductive adhesive. A thermal conductive agent is dispersed in a monomer solution, and the thermal conductive adhesive is formed by curing and cross-linking after in situ polymerization; the consumption ratio of the thermal conductive agent to the monomer is (1-4): (6-9); the thermal conductive agent consists of 75 to 90 percent of carbon fibers and 10 to 25 percent of carbon nano tubes; and the monomer is acrylic acid and/or acrylate. Because the thermal conductive agent of specific components is uniformly dispersed in the acrylic polymerization monomer to form a stable three-dimensional netlike thermal conductive structure, so that the thermal conductive adhesive is good in thermal conductive performance and good in environment friendliness. The thermal conductive adhesive can be applied between a light emitting diode (LED) light bar and an aluminum alloy profile, between the aluminum alloy profile and a back plate, between the LED light bar and the back plate or between a chip and a radiator, is used as a double-sided adhesive tape, and is used under the condition of a big gap between two contact faces of liquid crystal modules.

The invention discloses an automatic glue spraying and compounding all-in-one machine and a manufacturing method for automobile trunk carpet production. A template of the automatic glue spraying and compounding all-in-one machine is moved by a horizontal sliding mechanism so that the purpose of horizontal displacement glue spraying of a polypropylene cellular board on the template can be achieved through a glue spraying device. The glue spraying device is moved by a vertical sliding mechanism so that the purpose of vertical displacement glue spraying of the polypropylene cellular board on the template can be achieved through the glue spraying device. Meanwhile, the glue sprayed polypropylene cellular board on the template is glued to a sound insulation felt. The glued sound insulation felt and the polypropylene cellular board on the template are quickly transferred to the position below a pressing plate by the horizontal sliding mechanism. The pressing plate is automatically activated and quickly pushed by a power unit so that further pressing, compounding and molding can be carried out on the glued sound insulation felt and the polypropylene cellular board. According to the automatic glue spraying and compounding all-in-one machine and the manufacturing method for the automobile trunk carpet production, the compounding fastness and the production efficiency of an automobile trunk carpet are improved, and the compounded and molded automobile trunk carpet is good in operation performance.

The invention discloses a non-contact silicon chip deformation compensation apparatus, comprising a forward air floatation unit and an electrostatic adsorption unit, wherein the forward air floatation unit comprises a shell and a groove, a stationary electrode array is arranged at the bottom of the inner side of the groove, and the forward air floatation unit further comprises a plurality of air inlets formed in the shell an used for guiding in compressed air.

The invention discloses a kind of weight reduced, large-bore, and compound reflector. It includes a compound lens which is composed of folded graphite fiber/ wreath oxygen resin or graphite fiber/ cyanic acid fat panel + beehive interlayer + graphite fiber/ wreath oxygen resin or graphite fiber/ cyanic acid fat panel. It has these characteristics: On the lens, there are a microlite cylinder array and a tiny glass reflection base which are both fixed by wreath oxygen resin; On the microlite reflection base, a metallic reflection layer which is plated in vacuum exists. The advantages of the invention are as follows: It takes the microlite cylinder array as the join linking the carbon fiber compound material lens and the microlites reflection base so that the compound material lens can match the microlites reflection base's coefficient of heat expansion well and the problem of the mirror surface's anamorphic caused by heat can be solved. Moreover, the fact that the microlites reflection base has a good optical surface guarantees the reflector's heat stability and chemical stability.

The invention discloses a manufacturing method of a front guide cylinder of a large-size tubular pump. The manufacturing method comprises the steps of machining of a plate frame structure, installation of the plate frame structure and cast guide vanes, installation of the plate frame structure and a mask and machining of the front guide cylinder. Pairing and rough machining of the plate frame structure are completed through a thickened auxiliary process flange, and pairing welding of the plate frame structure and the cast guide vane is carried out with the auxiliary process flange as the reference; after the front guide cylinder is completely welded, the auxiliary process flange is removed, and the flange connecting end face of the axial rib plate is machined with the center and the end face of an impeller hub as the benchmark; welding the corrosion-resistant flange and the axial rib plate to ensure the concentricity of the impeller hub and the corrosion-resistant flange and the planeness of the end surface of the flange, and finally, finely machining the end surface, the inner circle and the outer circle of the corrosion-resistant flange by taking the center and the end surface of the impeller hub as references to ensure the thickness required by the design of the corrosion-resistant flange. The method is easy to implement, little in cost and construction period increase and capable of effectively reducing the difficulty of the overall manufacturing process of the guide cylinder.

The invention discloses an electrical servo position alignment control system and an electrical servo position alignment control method of a photoetching machine. The control system comprises a pneumatic triple element connected with an air source, an electrical servo direction flow valve, an electrical proportion flow regulator, an air-hydraulic damping cylinder formed by a servo cylinder and a hydraulic cylinder through series connection, a static-pressure air-floatation guide rail of a support workbench, a CCD (Charge Coupled Device) image sensor located above the workbench, and a photoetching machine controller, wherein the pneumatic triple element is connected with the electrical servo direction flow valve and the static-pressure air-floatation guide rail by two pipelines respectively, the electrical servo direction flow valve is connected with the servo cylinder, the electrical proportion flow regulator is connected with the hydraulic cylinder, a push rod of the hydraulic cylinder is connected to the workbench, and the photoetching machine controller is connected with the electrical servo direction flow valve, the electrical proportion flow regulator and the CCD image sensor. According to the electrical servo position alignment control system and the electrical servo position alignment control method of the photoetching machine, the homeostatic control precision of the system can be improved, and the position of the workbench can be accurately controlled.

A valve body of a solenoid valve (1) is formed by jointing a second valve body (10) and a first valve body (4) through fusion welding. Pipes (30, 32) are jointed with the second valve body through brazing (R). A valve core (50) is guided to slide by an internal circumferencial surface (42) of the first valve body (40). The first valve body (40) is not influenced by thermal deformation of brazing (R), so that good sliding performance of built-in components is guaranteed. According to the electric driving valve, thermal deformation of the sliding surface is avoided when the pipes are jointed with the valve body through brazing.

The invention discloses a polycrystalline diamond compact surface polishing machine with adaptive temperature and pressure. The polishing machine comprises a grinding wheel device, a detection device,an execution device, a control device and at least one eccentric rotary polishing device corresponding to the grinding wheel device; and the grinding wheel device, the detection device, the executiondevice and each eccentric rotary polishing device are respectively connected with a control device. The polishing machine not only has the advantages of a double-rocker swing mechanism, but also canrealize the rotation of a polycrystalline diamond compact in the polishing process and continuously and stably eccentrically rotate on the end surface of the grinding wheel, the polished surface is prevented from being scratched; and moreover, the polishing machine realizes self-adaptive control of polishing pressure, temperature and load current of a grinding wheel driving motor, improves polishing efficiency and quality, reduces stress deformation and thermal deformation influence of a large-area (even super-large-area) of the polycrystalline diamond compact, and solves the problem of immediate dressing of a polishing and grinding wheel.