136results about How to "Guaranteed thickness" patented technology

The invention relates to a wafer heater and a chemical vapor deposition system, which are used for solving the technical problem of non-uniform distribution of inert gas on the back surface of a wafer. The wafer heater comprises a heating part used for supporting a wafer and heating the wafer, the upper surface of the heating part is provided with a gas distribution channel, the gas distribution channel comprises a gas inlet and at least one first annular groove surrounding the gas inlet, at least one of the at least one first annular groove is provided with an annular wave line contour, and the gas inlet is communicated with the gas inlet; the plurality of first connecting grooves are radially connected between the air inlet and at least one first annular groove along the radial direction of the first annular groove; and the interface part is arranged at the bottom of the heating part, and the gas inlet is configured to be in fluid communication with an inert gas source through the interface part.

The invention discloses a production method for reducing slag runners in a spring steel square billet casting process, which specifically comprises the following steps: the superheat degree of continuous casting molten steel is 20-40 DEG C, slag is automatically added into a continuous casting square billet, and casting powder is conveyed into a crystallizer by taking compressed air as a carrier, so that a high-concentration compressed air atmosphere at an upper opening of the crystallizer is ensured, and the casting quality is improved. And a combustion-supporting effect is achieved on the casting powder, so that the melting effect of the casting powder is improved. And the insertion depth of the submersed nozzle is 70-80mm, so that the higher temperature of molten steel on the meniscus of the crystallizer is ensured, and the slag surface melting effect is improved. The slag line is not changed in the casting process; the crystallizer uses vibration parameters with high vibration frequency and high amplitude, so that the negative slippage time and the vibration advance amount of the crystallizer are improved, the inflow of liquid casting powder in an air gap between a steel billet and a copper pipe is facilitated, and the slag runner phenomenon in the casting process of the casting blank is avoided.

The invention discloses double-layer adhesive film processing equipment, a processing technology and an aluminum-based copper-clad plate, the double-layer adhesive film processing equipment comprises a box body, a base and a cover plate, and the box body is provided with a feeding part, an adhesive coating part, a pre-drying part and an extrusion forming part according to a process flow zone. Through mutual cooperation of the conveying assembly, the bending assembly, the gluing part, the pre-drying part, the extrusion forming part and other working areas, forming of the double-layer glue film can be automatically completed; and the glue film adopts a wire rod coating form, the thickness of each layer of glue film can be controlled to be 25 microns, and meanwhile, the viscosity of the glue is controlled to be 1500-3500 mpa.s, so that the viscosity can ensure that the glue cannot quickly flow due to the influence of gravity after coating, and the overall thickness can be ensured to be uniform after pre-drying and extrusion forming.

The invention belongs to the technical field of crystallizer casting powder, and provides crystallizer casting powder for medium carbon steel and a preparation method of the crystallizer casting powder. The crystallizer casting powder comprises the following raw materials: 20-40 parts of wollastonite, 20-40 parts of magnesium slag, 2-6 parts of quartz, 1-5 parts of bentonite, 2-6 parts of flint clay, 3-10 parts of fluorite, 1-3 parts of sodium carbonate, 1-2 parts of manganese carbonate, 3-7 parts of boron glass powder, 2-4 parts of magnesia powder, 6-10 parts of a carbon material and 2-4 parts of a modified binder. The crystallizer casting powder disclosed by the invention is reasonable in proportion of chemical components, has proper melting speed and viscosity, effectively ensures the thickness of a liquid slag layer, and can be uniformly consumed, so that the continuous casting process is ensured to be carried out smoothly, and the quality defects of corner cracks, narrow edge bulging, corner transverse cracks and the like of a medium carbon steel casting blank are avoided.

The invention relates to the technical field of concrete pouring, in particular to a cast-in-place frame structure concrete pouring process in building construction, which comprises the following steps: S1, preparation before construction, drawing analysis and arrangement, S2, template installation, reinforcement cage building, water stop screw installation, reinforcement positioning by adopting a positioning device, and reinforcement protection layer thickness adjustment. S3, concrete preparation and pouring, and S4, in the pouring process, a formwork is checked, correction and repair are conducted in time according to the problem of the formwork, and the influence on the construction progress and the reliability of a poured concrete body is avoided; s5, concrete curing; and S6, form removal and surface treatment. The two side formworks are fixed through the three-section type water stop screws, the outer side rods can be repeatedly used, economical efficiency is good, the structure is optimized, the requirement for tightening torque of nuts is lowered, construction is more convenient and reliable, meanwhile, a positioning device is arranged, the thickness of a steel bar protection layer is stably and reliably guaranteed, waste steel bars are recycled, and the resource utilization rate is increased.

The utility model discloses a seeder with a soil covering mechanism, which belongs to the technical field of seeding and comprises a frame, traveling wheels mounted below the frame, a plurality of seeding mechanisms mounted on the frame along a cross beam of the frame at intervals, and a connecting frame arranged on each seeding mechanism. A furrow opener is mounted on the front side of the seeding mechanism below the connecting frame, a soil covering device is mounted on the rear side of the seeding mechanism and comprises a soil covering mounting plate, the soil covering mounting plate is connected with the connecting frame through bolts, two arc-tile-shaped soil covering plates are symmetrically arranged below the soil covering mounting plate, and the two soil covering plates are arranged in a splayed shape; an opening between the two soil covering plates directly faces the furrow opener, and the front-end opening is larger than the rear-end opening. The soil coverer and the furrow opener of the seeder are simultaneously mounted on the front side and the rear side of the seeding mechanism and are matched for use, so that the soil covering quality of seeds is improved, the soil covering thickness is ensured, incomplete covering or covering soil floating on the surface is prevented, normal development and production of the seeds are ensured, and the emergence rate is increased.

The invention relates to the technical field of magnetron sputtering coating, in particular to equipment for a method for improving the magnetron sputtering thickness and uniformity of a target material. Comprising a vacuum cavity and a connection protection cavity, and the connection protection cavity is fixedly connected to the upper portion of the vacuum cavity; a rotating disc is rotationally connected into the vacuum cavity, and a first rotating mechanism matched with the rotating disc is arranged in the vacuum cavity. A plurality of fixed control blocks are fixedly connected to the rotating disc, base plates are arranged on the fixed control blocks, and angle adjusting mechanisms matched with the corresponding base plates are arranged on the fixed control blocks; a target material fixing disc is arranged in the vacuum cavity, and the target material fixing disc is located above one of the substrates and concentrically corresponds to the substrate; and a first lifting mechanism matched with the target material fixing disc is arranged in the connecting protection cavity.

The invention relates to an automatic display panel spraying processing system which comprises an ink jet assembly, the ink jet assembly comprises an ink jet moving assembly and an electric atomization nozzle module, and the ink jet moving assembly drives the electric atomization nozzle module to move in a horizontal plane; the conveying assembly comprises a bearing table and a conveying driving part, and the conveying driving part drives the bearing table to move in the printing direction; the mask assembly comprises a mounting frame and a mask plate; wherein the substrate moves to the position under the mask plate along with the bearing table, and the electric atomization spray head module conducts electric atomization spray printing on the substrate above the mask plate. According to the application, the mask plate covers the surface of the substrate, and the functional liquid is sprayed to the mask plate by using the electric atomization nozzle module, so that the functional liquid is arranged at the corresponding position of the substrate, and all pixel grids of the substrate do not need to be printed one by one; the adhesion position of the functional liquid on the substrate is not easy to deviate, and the condition that part of pixel grids are missed to be printed is not easy to occur, so that the processing efficiency of the substrate is improved.

The invention belongs to the technical field of valve sealing element coating and plating processes, and discloses a special valve hard sealing element dissimilar material coating and plating process which comprises the following steps: S1, surface pretreatment; s2, coating of a bottom layer coating; s3, coating of an intermediate coating; s4, coating of a top layer coating; s5, quality detection and control; the surface pretreatment comprises cleaning, mechanical treatment, acid pickling and passivation, the coating of the bottom coating comprises nickel plating treatment and chromium plating treatment, the coating of the middle coating comprises ceramic coating and coating curing, and the coating of the top coating comprises tungsten carbide coating and coating heat treatment. The quality detection and control comprises coating thickness testing, adhesive force testing, corrosion resistance testing and wear resistance testing. According to the method, a compact and hard ceramic coating is formed through curing treatment, so that the high temperature resistance of the sealing element is improved, and the wear resistance and corrosion resistance of the sealing element are further enhanced.

The invention provides a hot stamping forming die and a hot stamping forming method, belongs to the technical field of hot stamping, solves the problems of wrinkling and stacking of stamped plates, and adopts the scheme that the hot stamping forming die comprises a die steel block 2 used for hot stamping forming, the die steel block 2 is further provided with air blowing holes 1, and the air blowing holes 1 are communicated with the die steel block 2. The blowing hole 1 is a risk area determined according to the hot stamping forming of the plate 7, and the risk area refers to a small-range thinning excessive out-of-tolerance area or a cracking area of the plate 7 in the hot stamping forming process or a risk area determined when the hot stamping forming plate is subjected to simulation analysis in the early stage; and one end of the air channel pipe 4 penetrates through the die steel block 2 to be connected with the air blowing hole 1, and the air channel pipe 4 is used for cooling the hot stamping forming plate 7 through the air blowing hole. The cooling system is added for the risk area, so that the local temperature of the plate is lower than that of other parts, the austenite conversion rate is higher than that of other parts, and the tensile strength of the area is improved.

The invention relates to the field of electroplating production lines, in particular to an automatic silver plating production line and method. Comprising a guide rail, a travelling crane arranged on the guide rail and a control device, a position measuring device is arranged on the travelling crane, a positioning device corresponding to the position measuring device is arranged at the position of a silver plating tank, and the control device is respectively connected with the position measuring device, the silver plating tank and the positioning device. The control device is matched with the position measuring device, so that the travelling crane can automatically identify the position of the silver plating tank, accurate positioning of the travelling crane and the silver plating tank is realized, meanwhile, the positioning accuracy is high, and after positioning is completed, the control device can realize plating of parts according to set parameters; the preset parameters can ensure the uniformity and the thickness of the coating of the part, so that the quality of the coated part can reach the preset standard and meet the process requirements.

The utility model discloses a tray assembly for block shaping of bean curd slurry, and aims to solve the problems that existing bean block making is too complicated and too slow in efficiency, the inner surface of a frame for making bean blocks is horizontal, shaped bean curd blocks are easy to stick, and the surfaces of the bean curd blocks are easy to damage when the bean curd blocks are taken out. The tray assembly comprises a plurality of mutually-stacked shaping assemblies, each shaping assembly comprises a tray, gauze and a plastic grid, a plurality of water leakage holes are formed in the side face of each tray, a plurality of transverse division pieces and vertical division pieces are integrally connected to the inner bottom of each tray, bean curd grids are formed between the transverse division pieces and the vertical division pieces, and the transverse division pieces and the vertical division pieces are arranged in the bean curd grids. A plurality of through holes are formed in the inner bottom walls of the bean curd grids. The shaping assembly composed of the tray, the gauze and the plastic grid is utilized, bean curd blocks can be automatically cut and shaped, the outer surfaces of the bean curd blocks can not be damaged when the bean curd blocks are taken out easily, and the device has the advantages of being convenient to operate, large in yield and high in efficiency.

This invention provides a fixture for controlling the adhesive thickness of Heilbeck magnetic components. The mounting base includes a station, a push rod moving mechanism, and a pressure rod moving mechanism. The station is used to place a fixture plate with a placement slot for holding the magnetic components. The magnetic components include a fixed magnet and a movable magnet, with adhesive dots positioned between them. The push rod moving mechanism includes a first drive unit and a push rod. The first drive unit drives the push rod to move the movable magnet along the placement slot, closer to the fixed magnet, and controls the adhesive dot spacing between the movable and fixed magnets. The pressure rod moving mechanism includes a second drive unit, an elastic element, a primary pressure rod, and a secondary pressure rod. The length of the primary pressure rod is greater than the length of the secondary pressure rod. The second drive unit drives the primary pressure rod to pre-press and fix the fixed magnet, preventing it from being sucked away. The second drive unit also drives the primary and secondary pressure rods to apply pressure to the fixed magnet and the movable magnet, respectively. This fixture is used to control the adhesive thickness and improve the quality of the magnetic components.

The present invention relates to a preparation device and preparation method of an electrolytic metal foil, wherein the preparation device of the electrolytic metal foil comprises: an electrolytic cell, a cathode system, an anode system and an insulating partition; wherein the cathode system comprises a rotating device and a cathode; the cathode is located in the electrolytic cell; the rotating device is connected to the cathode to drive the cathode to rotate during the electrolytic deposition process; the anode system comprises an anode; wherein the anode is placed in the electrolytic cell and arranged around the cathode; the insulating partition is placed in the electrolytic cell and is located between the cathode and the anode; the insulating partition is arranged around the cathode, and the anode is arranged around the insulating partition; a plurality of meshes are provided on the insulating partition to adjust the uniformity of the electrolytic metal foil in the width direction by adjusting the aperture and distribution of the meshes. The electrolytic metal foil preparation device of the present invention can ensure the uniformity of the metal foil, and it is small in size, flexible in operation, and can meet industrial production conditions, providing an experimental device for the development of high-performance electrolytic metal foil preparation technology.

This utility model discloses a laser cutting and engraving stage, belonging to the field of laser cutting technology. The laser cutting and engraving stage includes a frame and multiple sets of elongated support plates. Each support plate has a first working surface and a second working surface. The frame has a working area, and multiple equidistant limiting grooves are formed on the inner walls of both sides of the working area. The two ends of the support plates extend into the limiting grooves. When the first working surface is horizontal, the support plate is in a first working state; when the second working surface is horizontal, the support plate is in a second working state. This utility model, by creating limiting grooves within the frame and extending the two ends of the support plates into these grooves, and by having both a first and a second working surface, allows for switching between honeycomb and blade-type stages through the switching between the first and second working surfaces. This eliminates the need for additional stage types, reduces operating costs, minimizes space occupation, and improves performance.

The invention discloses a laser scribing device which comprises a support, a reflecting mirror, laser rays and a focusing mirror, the reflecting mirror is arranged on the support and provided with a mirror surface, the laser rays can be emitted to the mirror surface and reflected on the mirror surface, the reflection angle of the laser rays is adjustable, and the focusing mirror is arranged on the support. The focusing mirror is arranged on the support and can move relative to the reflecting mirror, and reflected light obtained after the laser light is reflected by the mirror face can be emitted out through the focusing mirror so that a battery substrate can be scribed. The laser scribing angle of the laser scribing device is adjustable, the thickness of a film layer on a battery substrate is guaranteed, and the battery performance is improved.

The invention relates to the technical field of magnetic suspension equipment, and provides a rotor structure and an assembly tool. The rotor structure comprises a core shaft and magnetic steel sleeved on the core shaft, the surface of the core shaft is recessed to form mounting grooves, the mounting grooves extend along the circumferential direction, the magnetic steel is arranged in the mounting grooves, titanium rings are arranged at two ends of the magnetic steel along the axial direction, one titanium ring is abutted between one side of the magnetic steel and the groove wall of the mounting groove on the corresponding side, and the other titanium ring is abutted between the other side of the magnetic steel and the groove wall of the mounting groove on the corresponding side. One titanium ring abuts against the magnetic steel, the other titanium ring abuts against the position between the other side of the magnetic steel and the groove wall of the mounting groove in the corresponding side, at least one of the two titanium rings forms a wedge-shaped titanium ring, and the width of the section of the wedge-shaped titanium ring is gradually reduced in the direction pointing to the axis of the mandrel along the circumferential face of the mandrel. According to the rotor structure provided by the invention, the pressing force in the axial direction can be generated between the wedge-shaped titanium ring and the groove wall of the mounting groove, so that the flexural rigidity of the rotor structure can be enhanced, the critical rotation speed of the rotor structure is improved, and the rotor structure has relatively good operation stability.

The utility model relates to the technical field of graphitization furnaces, and aims to solve the problems that the existing graphitization furnace is non-uniform in resistance material filling, non-uniform in temperature rise in a furnace body, limited in cathode material filling amount in a crucible and low in effective utilization rate of a space in the furnace. The utility model provides a graphitization furnace for an artificial graphite cathode material. The graphitization furnace comprises a furnace body and a plurality of square crucibles, the plurality of square crucibles are distributed in the furnace body in a matrix manner; a plurality of square crucibles in the same row are connected in series through a first connecting assembly; the plurality of square crucibles in the same column are connected through a second connecting assembly; the first connecting assembly is clamped with the second connecting assembly; a resistor filling layer is arranged between every two adjacent rows of square crucibles; a thermal insulation layer surrounding the plurality of square crucibles is arranged in the furnace body; according to the graphitization furnace for the artificial graphite cathode material, the square crucible with the filling amount higher than that of a traditional round crucible is adopted, the effective space in the furnace is fully utilized, the graphitization furnace is more durable, and the use frequency of the graphitization furnace is higher than that of the traditional round crucible.

The invention discloses a reinforcing steel bar connecting sleeve, a connecting structure and a construction method, and relates to the technical field of building reinforcing steel bar connection.The reinforcing steel bar connecting sleeve comprises a sleeve body and reinforcing steel bars to be connected, and the sleeve body comprises a sleeve body and a sealing gasket located at the end opening of the sleeve body; a closed cavity is formed in the barrel through the sealing gasket, and a cementing material is arranged in the closed cavity of the barrel; the connecting reinforcing steel bars penetrate through the sealing gasket and penetrate into the cylinder body, the connecting reinforcing steel bars are wrapped by the cementing material, and the cylinder body is connected with the reinforcing steel bars. The invention has the advantages that the cementing material is injected into the sleeve in advance, only the reinforcing steel bar is inserted during installation, the installation is convenient, and the connection is reliable; due to the structure of the sealing gasket, little cementing material leaks out, the connection of the sleeve is visually checked due to the arrangement of the material bolt hole, and compared with an existing grouting sleeve, the connection quality is better guaranteed; the sleeve can be applied to a cast-in-place environment and a prefabrication environment, and the other end of the sleeve is provided with ports in different forms, so that the sleeve can be suitable for various occasions and is convenient to install and efficient in connection.

A cyclohexyl imine production system comprises a reactor, a filter, a dealcoholization tower, a decanter, and a separation tower, wherein a feed port is provided at the bottom of the reactor for connecting with adiponitrile, ethanol, alkali, and a hydrogen source, a discharge port is provided at the top of the reactor, and the dealcoholization tower is fed through the filter, the bottom liquid outlet of the dealcoholization tower is connected to the decanter, and the light phase outlet of the decanter is connected to the feed port of the separation tower. The present invention has a simple structure and is easy to operate, and can continuously and stably produce cyclohexyl imine and hexamethylenediamine at the same time, meeting the actual needs of chemical enterprises.

The application discloses a kind of production and cultivation methods of crisp chicken, comprising the following steps: S1, cultivate crisp chicken species: with E'mei black chicken as basic population, hybridization breeding is obtained with sasso chicken, and hybridization is obtained with Rongde small black chicken, and the crisp chicken species with chicken skin thickness not less than 2.3mm is selected and bred;S2, nutrition regulation feeding is carried out: the nutrition regulation feeding of at least 50 days is carried out to the crisp chicken species in fattening period, and the feed with the crude protein content of 18%-22% is provided, and the feed includes soybean meal, vitamin C, fat, fat metabolism aid, fermented soybean meal and trace nutrients;S3, breeding environment management is carried out: in fattening period, control chicken house environment temperature is 18-25 DEG C, relative humidity is 50%-60%, and breeding density is controlled.The application is cultivated by three system matching breeding, accurate nutrition regulation and fine breeding management multi-link cooperation, and the chicken species that fits crisp core characteristic is cultivated.

The present invention discloses a cutting device, including a frame, a platform, a tool holder, and a cutter; the platform is movably arranged in the frame, a platform driving source is arranged at the bottom of the platform, and the platform driving source can drive the platform to rise and fall back and forth in the Z-axis direction; the tool holder is slidably arranged at the top of the frame, the tool holder is connected to the tool holder driving source, and the tool holder driving source drives the tool holder to slide horizontally in the X-axis direction; the cutter is slidably arranged at the bottom of the tool holder, the cutter is connected to the cutter driving source, and the cutter driving source drives the cutter to slide back and forth in the Y-axis direction, and the cutter is inclined with respect to the horizontal plane. The present invention ensures the flatness of the product cutting surface, improves the cutting utilization rate of the product, and ensures the thickness of the cut product.

The invention discloses a trench isolation structure, a preparation method thereof and a semiconductor device, and the preparation method comprises the steps: providing a semiconductor substrate which comprises a trench; at least the interior of the groove is filled with a sacrificial layer, and the filled sacrificial layer exposes a part of height of the side wall of the groove in the depth direction from the port of the groove to the interior of the groove. A first oxidation film layer is at least formed on the side wall of the groove and above the sacrificial layer in the groove, a first part of the first oxidation film layer is formed on the side wall of the groove, and a gap is formed in the first part; the second portion is formed at the bottom of the gap and on the sacrificial layer. Forming a window on the second part, wherein the window exposes part of the sacrificial layer; and removing the sacrificial layer in the groove based on the window. And filling the gap in the first part with a second oxide film layer until the gap is completely filled with the second oxide film layer. Therefore, the preparation process of the trench isolation structure can be simplified, the preparation difficulty and cost can be reduced, and the performance of the semiconductor device can be improved.

The tool apron comprises an installation plate, a groove is fixedly formed in the bottom of the tool apron, a protruding strip is fixedly arranged at the joint, corresponding to the groove, of a scraper, the protruding strip can be embedded into an inner cavity of the groove, a plurality of second bolts movably penetrate through the rear end face of the groove of the tool apron, and the second bolts are fixedly arranged on the installation plate. And the second bolts are in threaded connection with the interiors of the convex strips of the scrapers. The utility model relates to the technical field of land levelers, through the cooperation among the grooves, the raised lines and the second bolts, the arrangement position of the groove at the bottom of the tool apron reserves a sufficient installation space for the scraper, the thickness of the scraper is ensured, and the scraper can be limited to a certain extent by the grooves and the raised lines, so that the scraper can be fixed by the single row of second bolts, and the installation is convenient. Disassembly and assembly are more convenient; and meanwhile, through cooperation of the first tooth set, the second tooth set, the through groove, the first bolt and the nut, the length between the tool apron and the mounting plate can be adjusted more conveniently and flexibly.

The utility model provides an abutted seam joint of a fully-prefabricated floor slab and a wallboard. The splicing joint of the fully-prefabricated floor slab and the wall plate comprises a first connecting steel bar, a second connecting steel bar and a lap joint steel bar, a first mounting groove is formed in the side, close to the floor slab, of the wall plate, a second mounting groove is formed in the side, close to the wall plate, of the floor slab, and the first mounting groove communicates with the second mounting groove; one end of the first connecting steel bar extends into the wall plate, the other end of the first connecting steel bar is located in the first mounting groove, one end of the second connecting steel bar extends into the floor plate, the other end of the second connecting steel bar is located in the second mounting groove, and the first connecting steel bar and the second connecting steel bar are connected through the lap joint steel bar. And concrete capable of covering the first connecting steel bars, the second connecting steel bars and the lap joint steel bars is arranged in the first mounting groove and the second mounting groove. According to the utility model, the working procedures of on-site formwork erecting, dismantling and supporting are reduced, the construction difficulty is reduced, and the construction efficiency is improved.

The utility model relates to a membrane bag which comprises a filtering part and a peripheral packaging part arranged on the peripheral side of the filtering part in a wrapping mode, and the filtering part comprises a screen and a filtering membrane which are arranged at intervals. The screen is provided with a through hole and a packaging hole, the peripheral packaging part is provided with two oppositely arranged peripheral packaging part end faces, at least one side end face of the peripheral packaging part is provided with an abutting area, and the abutting area protrudes out of the peripheral packaging part end faces; the projection area of the abutting area on the end face of the peripheral packaging part is smaller than the area of the end face of the peripheral packaging part, so that a receding area can be formed between the side wall of the abutting area and the end face of the peripheral packaging part, and the packaging structure has the advantages that the sealing effect is good, and the supporting strength of the peripheral packaging part is not affected.

The present application relates to the technical field of submerged arc welding, in particular to a wind power tower cylinder girth weld walking type welding equipment and method thereof, the equipment comprises a submerged arc welding machine main body, a double-tube gun head is arranged on the submerged arc welding machine main body, a welding wire is arranged in the vertical pipe of the double-tube gun head and is conveyed downward, and the inclined pipe communicated with the vertical pipe conveys flux to the vertical pipe, a gravity frame is arranged at the bottom end of the double-tube gun head, and a material pusher is arranged at both ends of the gravity frame, the traditional wind power tower cylinder submerged arc welding technology has the problem of flux loss in the advancing direction of the welding gun head, and then the sealing coverage of the flux to the welding wire is insufficient, the welding wire is exposed to the air, sparks are generated, the two sides of the cone-shaped flux accumulated by the material pusher on both sides of the girth gap are supplemented into the welding wire advancing area, the thickness of the advancing area flux is ensured, and the welding wire is prevented from being exposed to the air or the problem of air invasion and oxidation caused by the thinning of the flux layer.

Embodiments of the present application disclose a secondary battery and a battery pack, wherein the secondary battery comprises: a shell comprising: a side wall, a bottom wall and a first connecting portion, the side wall extends along a first direction, the bottom wall is arranged on one side of the side wall in the first direction, and the side wall and the bottom wall cooperate to enclose a containing cavity; two ends of the first connecting portion are connected with the side wall and the bottom wall respectively; an electrode assembly arranged in the containing cavity; and a first insulating coating arranged on an outer wall surface of the first connecting portion; wherein the thickness of the first insulating coating is H1 mm, and the following formula is satisfied: H1 = 0.09175 + 0.00294X + 0.06165X 2 - 0.03236X 3 , X = R x sin(alpha / 2) x sin(180°-beta). According to the present application, the risk of insulation breakdown of the shell is reduced, the safety performance of the shell is improved, and the safety performance of the secondary battery is improved.

The present invention belongs to the technical field of electrolytic copper foil production, and the present invention provides an additive for ultra-thick electrolytic copper foil, an ultra-thick electrolytic copper foil and a preparation process thereof. The additive comprises the following components: aspartic acid, 2-mercaptopyridine, gelatin, sodium polydisulfide dipropane sulfonate, polyvinyl alcohol and water. The present invention also provides a preparation process for ultra-thick electrolytic copper foil using the above-mentioned additive, comprising the following steps: S1, adding a copper block to a sulfuric acid solution for reaction to generate a copper sulfate electrolyte; S2, adding the additive to a copper sulfate solution for electrolysis to produce a super-thick electrolytic copper foil. The ultra-thick electrolytic copper foil prepared by the present invention not only ensures its own thickness, but also ensures its own strength. It will not easily become loose due to uneven sticking due to excessive thickness of the body, thereby extending its service life and meeting the needs of high-end circuit boards.

The utility model relates to an anti-deformation vertical lathe clamp for thin ring type parts, which solves the technical problems that when the existing thin ring type parts are machined, the thin ring type parts are fixed by a traditional pull rod expansion sleeve type lathe clamp, so that the thin ring type parts are deformed, the thickness and the planeness of the thin ring type parts are easy to be out of tolerance, and the percent of pass is low. The device comprises a transition plate and a flange plate which are sleeved on a mandrel, the transition disc is fixedly connected to the flange plate, and the supporting plate is fixedly connected to the transition disc. An outer conical surface convex ring is arranged at the top of the mandrel, a convex column is arranged on the upper surface of the transition disc, and the expansion sleeve sleeves the convex ring and the convex column; the top end of the expansion sleeve is provided with an inner conical surface matched with the convex ring, the middle is of a flexible structure, and the bottom end is fixed to the transition disc 2 and located between the convex column and the supporting plate. The clamping device is used for clamping thin ring type parts with large inner diameters, large outer diameters and small thicknesses, and meanwhile deformation of the thin ring type parts is avoided.