Abrégé

A grinding apparatus for a ring-shaped piece, comprising a stand (10), a holding assembly, and a grinding mechanism (12). The stand comprises an upright post (14) and at least one stop block (16) fixed on the upright post, a cylinder (18) being provided outside the upright post. The holding assembly comprises three holding members (20) evenly provided at intervals along the circumferential direction. Each holding member comprises a first arc-shaped plate (22), a second arc-shaped plate (24), a spring (26) connecting the first arc-shaped plate to the second arc-shaped plate, and two metal rods (28) connected to the first arc-shaped plate, each metal rod extending outside the cylinder. Three electromagnets (30) are provided outside the cylinder, and each electromagnet is provided corresponding to two metal rods. The grinding mechanism is located above the upright post. A dust collection groove (32) is fixed below the upright post. The dust collection groove is connected to a fan (36) by means of a first air duct (34). The fan is connected to a dust storage barrel (40) by means of a second air duct (38). The grinding apparatus for a ring-shaped workpiece features a good fixing effect and good grinding quality and avoids dusting by means of the cooperation of the dust connection groove and a dust stop cover.

Classes IPC  ?

• B24B 5/04 - Machines ou dispositifs pour meuler des surfaces de révolution des pièces, y compris ceux qui meulent également des surfaces planes adjacentes; Accessoires à cet effet possédant des pointes ou des mandrins pour maintenir la pièce pour meuler extérieurement des surfaces cylindriques

Abrégé

Provided is a tube cleaning device, comprising a positioning plate (10), and a first cleaning tank (12) and a second cleaning tank (14) which are sequentially disposed in a horizontal direction, wherein the first cleaning tank (12) has installed thereon a positioning seat (18) which is configured with a positioning slot (20) and two surrounding walls (21), with an elongated magnet (22) being disposed at an inner side of each of the surrounding walls (21), and a first elongated through hole (24) passing through a bottom wall of the positioning slot (20); a lower portion of the positioning plate (10) is disposed inside the positioning slot (20), with a second elongated through hole (26) being passing the positioning plate (10); and a cylinder (28) and a cleaning brush (32) connected to a cylinder arm (30) of the cylinder (28) are disposed above the first cleaning tank (12), the cleaning brush (32) comprising a cleaning brush body (34) and a plurality of bristles (36) disposed on the cleaning brush body (34) in a staggered manner. The two elongated magnets (22) attract each other such that the two elongated magnets (22) press the positioning plate (10) in opposite directions, and the positioning plate (10) deforms such that the tube is firmly clamped by the positioning plate (10), which allows thorough cleaning at low cost. The bottom of the tube is not brought into contact with an inner side of the bottom wall of the first cleaning tank in order to avoid contamination of the tube.

Classes IPC  ?

• B08B 9/087 - Nettoyage de récipients, p.ex. de réservoirs par des procédés impliquant l'utilisation d'outils, p.ex. de brosses, de grattoirs

Abrégé

Provided is a multifunctional welding bench, comprising a bench plate (10), four support feet (12) fixed to a bottom end of the bench plate (10), and a stand plate (14) fixed to the bench plate (10). The bench plate (10) comprises a bench plate body (16), and a left extension plate (18), a right extension plate (20) and a front extension plate (22) slidably connected to the bench plate body (16); and an upper end of the bench plate body (16) is inclined with the front being low and the rear being high, the stand plate (14) is provided with a water storage tank (44), a bottom end of the water storage tank (44) is provided with a water outlet (46), the stand plate (14) is internally provided with a water inlet channel (48), and the water outlet (46) is in communication with the water inlet channel (48).

Classes IPC  ?

• B23K 37/00 - Dispositifs ou procédés auxiliaires non spécialement adaptés à un procédé couvert par un seul des autres groupes principaux de la présente sous-classe
• B25H 1/20 - Etablis; Etagères ou supports portatifs pour disposer des outils portatifs ou des pièces à travailler avec possibilité de protéger l'aire de travail
• B25H 1/02 - Etablis; Etagères ou supports portatifs pour disposer des outils portatifs ou des pièces à travailler du type table

Abrégé

Disclosed are a resistance paste for a chip resistor and a preparation method therefor. The resistance paste for a chip resistor comprises the following raw materials in parts by weight: 50-60 parts of alloy conductive filler, 10-15 parts of ruthenium dioxide, 5-10 parts of manganese dioxide, 5-10 parts of calcium oxide, 10-15 parts of nano-silica, 2-6 parts of dimethyl silicone oil, 10-15 parts of polyethylene glycol, and 3-8 parts of binder. The resistive paste of the present invention has a simple raw material formulation, does not contain lead, is environmentally friendly, and meets the resistance conductive performance requirement by using the alloy conductive filler. The paste achieves good stability by using ruthenium dioxide, manganese dioxide, calcium oxide, and nano-silica, and achieves good dispersibility and adhesion by using dimethyl silicone oil and polyethylene glycol. The use of the binder enables the paste to be more stable and have good adhesion.

Classes IPC  ?

• H01B 1/22 - Matériau conducteur dispersé dans un matériau organique non conducteur le matériau conducteur comportant des métaux ou des alliages
• H01C 7/00 - Résistances fixes constituées par une ou plusieurs couches ou revêtements; Résistances fixes constituées de matériau conducteur en poudre ou de matériau semi-conducteur en poudre avec ou sans matériau isolant

Abrégé

Disclosed are a thick film resistor paste and preparation method therefor. The thick film resistor paste comprises the following raw materials in parts by weight: alloy conductive filler: 50-60 parts; ruthenium dioxide: 10-15 parts; barium oxide: 10-15 parts; titanium dioxide: 5-10 parts; nano silicon dioxide: 5-10 parts; acrylic resin: 10-15 parts; dimethylsiloxane: 2-6 parts; and terpineol: 10-15 parts. The thick film resistor paste of the present invention features a simple proportion of raw materials, is lead-free and environmentally friendly, and implements the conductive performance of a resistor by means of the alloy conductive filler, good paste stability by means of the ruthenium dioxide, barium oxide, titanium dioxide, and nano silicon dioxide, good paste dispersibility and adhesiveness by means of the acrylic resin, and good paste fluidity and bonding performance by means of the dimethylsiloxane and terpineol.

Classes IPC  ?

• H01C 7/00 - Résistances fixes constituées par une ou plusieurs couches ou revêtements; Résistances fixes constituées de matériau conducteur en poudre ou de matériau semi-conducteur en poudre avec ou sans matériau isolant
• H01B 1/22 - Matériau conducteur dispersé dans un matériau organique non conducteur le matériau conducteur comportant des métaux ou des alliages

Abrégé

A valve manufacturing method, comprising the following steps: (1) making a mold; (2) molding by means of molding sand; (3) melting; (4) casting; (5) cooling; (6) tempering; and (7) degreasing. The present valve manufacturing method uses refined steel liquid, which is inoculated before casting, so that the valve obtained after casting has less shrinkage on the surface, and less pores inside; at the same time, the valve has less variation in overall hardness, with the stepped cooling and tempering treatments improving the hardness of the valve surface. And finally, the method uses a degreasing treatment to make the valve clean and bright as a whole.

Classes IPC  ?

• C22C 33/04 - Fabrication des alliages ferreux par fusion
• C21C 7/04 - Elimination des impuretés par addition d'agent traitant
• B22C 9/00 - Moules ou noyaux; Procédés de moulage
• C21D 1/18 - Durcissement; Trempe avec ou sans revenu ultérieur
• C21D 9/00 - Traitement thermique, p.ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliers; Fours à cet effet

Abrégé

Provided is an air conditioner outdoor unit support having a cleaning function. The support comprises two supporting assemblies, at least one connecting rod (10) connecting the two supporting assemblies, and a cleaning mechanism mounted on the two supporting assemblies, wherein each supporting assembly comprises a vertical rod (12), a horizontal rod (14) fixed to the vertical rod (12), and a supporting rod (16) connecting the vertical rod (12) and the horizontal rod (14); the cleaning mechanism comprises two first L-shaped rods (18), a cleaning pipe (20) connecting the two first L-shaped rods (18), a plurality of cleaning nozzles (22) mounted on the cleaning pipe (20), and a water outlet flexible pipe (24) in communication with the cleaning pipe (20); and the two first L-shaped rods (18) are respectively mounted on the two vertical rods (12), and the water outlet flexible pipe (24) is connected to a water inlet flexible pipe (26).

Classes IPC  ?

• F24F 1/60 - Agencement ou montage des éléments extérieurs
• B08B 3/02 - Nettoyage par la force de jets ou de pulvérisations

Abrégé

Disclosed is a surface treatment process for a valve, comprising water washing a valve obtained by processing, directly placing same into a pickling tank for pickling after water washing, soaking the valve in a polishing agent after the pickling is completed, chemical polishing same under a vibratory condition; and spray coating an anti-corrosive agent on the surface of the valve after the polishing is completed.

Classes IPC  ?

• C23G 1/02 - Nettoyage ou décapage de matériaux métalliques au moyen de solutions ou de sels fondus avec des solutions acides
• C23F 3/00 - Brillantage des métaux par des moyens chimiques
• C09D 175/04 - Polyuréthanes
• C09D 133/04 - Homopolymères ou copolymères d'esters
• C09D 103/02 - Amidon; Ses produits de dégradation, p.ex. dextrine

Abrégé

A copper alloy valve processing technology Said processing technology comprises the following steps: (1) manufacturing a mold; (2) shaping with molding sand; (3) smelting; (4) pouring; (5) cooling; and (6) surface treatment: cleaning the surface of the valve, cutting out pouring gates and feeder heads, relief grinding protrusions such as burrs and fins, cleaning residual sand, and spraying a protective agent on the surface of the valve, so as to obtain a copper alloy valve. According to said processing technology, heat-resistant molding sand is used, so that the produced valve has a small error in wall thickness, small surface blowholes, and few internal gas pores and shrinkage cavities, and the yield of the valve is high; staged cooling is used, which helps to improve the ductility of the alloy while improving the strength of the alloy; a protective agent is sprayed on the surface of the valve after casting is finished, reducing corrosion on the valve, prolonging the service life of the valve.

Classes IPC  ?

• C22C 38/02 - Alliages ferreux, p.ex. aciers alliés contenant du silicium 
• C22C 38/06 - Alliages ferreux, p.ex. aciers alliés contenant de l'aluminium
• C22C 38/08 - Alliages ferreux, p.ex. aciers alliés contenant du nickel
• C22C 38/16 - Alliages ferreux, p.ex. aciers alliés contenant du cuivre
• C22C 33/04 - Fabrication des alliages ferreux par fusion
• B22C 1/00 - Compositions des matériaux réfractaires pour moules ou noyaux; Leur structure granulaire; Caractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules
• C21C 7/04 - Elimination des impuretés par addition d'agent traitant

Abrégé

A locking screw (1), comprising a screw cap (2), wherein one end of the screw cap is provided with a connecting rod (3), a fastening rod (4) is at least partially embedded in the connecting rod, and the fastening rod is at least partially locked at an inner part of the connecting rod; the connecting rod is internally provided with a spring (32), and the spring abuts against one end of the fastening rod; an outer surface of the fastening rod is at least partially provided with a first external thread (42); the connecting rod comprises a connecting sleeve (31) connected to the screw cap, the connecting sleeve is internally provided with a blind hole (33), one end of the blind hole is connected to the screw cap, and the other end is provided with a locking hole (34); the fastening rod comprises a screw rod (41) that at least partially penetrates the inside of the blind hole, one end of the screw rod being provided with a first boss (43) that is embedded in the blind hole, and the first boss being embedded with an inner wall of the blind hole. The present locking screw may be adapted to many types of mechanical and electronic devices and has a flexible fastening effect.

Classes IPC  ?

• F16B 39/284 - Blocage par déformation élastique
• F16B 39/24 - Blocage des vis, boulons ou écrous dans lequel le verrouillage se fait en même temps que le vissage ou le serrage par rondelles, rondelles à ressort ou plaques élastiques qui bloquent contre l'objet
• F16B 35/02 - Boulons filetés; Boulons d'ancrage; Goujons filetés; Vis; Vis de pression partagés dans le sens de la longueur

Abrégé

Disclosed is an air conditioner outdoor unit protection frame, comprising an outer support and an inner support provided in the outer support, wherein the outer support comprises an outer framework (10), a top cover (12) mounted on the outer framework (10), and a protection mechanism mounted on the top cover (12); the outer framework (10) comprises a bottom plate (14), and two front stand rods (16) and two rear stand rods (18) fixed onto the bottom plate (14); the protection mechanism comprises a first protection assembly (20) and two second protection assemblies (22) symmetrically arranged; and the inner support comprises two supporting rods (24), the two supporting rods (24) being respectively fixed to the two rear stand rods (18).

Classes IPC  ?

• F24F 1/58 - Revêtements protecteurs séparés pour éléments extérieurs, p.ex. protections solaires, écrans anti-neige ou camouflage
• F24F 1/60 - Agencement ou montage des éléments extérieurs