86results about How to "Guaranteed bending accuracy" patented technology

A product intermittently having a bent portion which curves three-dimensionally and a quenched portion is manufactured by performing bending downstream of a support means while feeding a metal material which is supported by the support means from an upstream side towards a downstream side. A portion of the metal material is heated by a heating means downstream of the support means. A bending moment is imparted to the portion of the metal material heated by the heating means to three-dimensionally change the position of a movable roller die which is disposed downstream of the heating means and has a plurality of rolls which feed the heated metal material in the axial direction, and the metal material is quenched by spraying a cooling medium at the portion of the metal material which was heated by a cooling means disposed between the heating means and the movable roller die.

The invention discloses a high-precision hydraulic plate bending machine and belongs to the technical field of machine tool manufacturing. The high-precision hydraulic plate bending machine comprises a frame, a slider assembly, a slider travel adjustment mechanism, a synchronous mechanism, and a rear stop mechanism. The middle of each of rear, main and front vertical plates of the frame is provided with a cylinder holding cavity which three compensating cylinders are mounted inside. The lower portion of a slider is connected with an upper die through a clamping component. The upper die is composed of twenty upper die segments. In the slider travel adjustment mechanism, a first worm and a second worm are driven through a transmission shaft so as to drive a first screw and a second screw to adjust up and down; two synchronous forks are fixedly connected to a synchronous shaft of the synchronous mechanism, and the moving ends of the synchronous forks are both connected with the slider through a fork joint bearing. The rear stop mechanism comprises a transmission system component and a slide carriage system component. The high-precision hydraulic plate bending machine has the advantages that precision of the machine bending work pieces is greatly improved and work efficiency of workers is also improved.

The invention discloses a bending heat exchanger and a bending method of the heat exchanger. The bending heat exchanger comprises a first collecting pipe, a second collecting pipe, a plurality of fins and a plurality of flat pipes. Each flat pipe comprises a first portion, a second portion and a middle portion connected with the first portion and the second portion; and the first portions and the second portions are in contact with the fins respectively. Each middle portion comprises a first twisting portion, a second twisting portion and a straightness portion, wherein the first twisting portion is connected with the corresponding first portion, the second twisting portion is connected with the corresponding second portion, and the straightness portion is connected with the first twisting portion and the second twisting portion. The straightness portions of the flat pipes are sequentially overlapped partly and are sequentially and tightly attached together. Each straightness portion comprises an inner surface and an outer surface, and the inner surfaces and the outer surfaces of the straightness portions are flat on the flat. According to the arrangement, the bending precision can be ensured, and in addition, the flat bending portions can reduce the height of the bending heat exchanger; and under the condition of the same length of the flat pipes, the length of fin segments is increased, and therefore the heat exchange performance of the heat exchanger can be improved.

The invention discloses a semi-automatic scale mark reinforcing steel bar bending machine, relates to the technical field of reinforcing bar bending forming devices, and aims at providing the semi-automatic scale mark reinforcing steel bar bending machine with the accurate bending angle. According to the technical scheme, the semi-automatic scale mark reinforcing steel bar bending machine comprises a machine tool. A working disc connected with the machine tool is arranged at the upper portion of the machine tool. A rotating disc is arranged at the center of the working disc and connected with a power mechanism inside the machine tool and rotates around the axis of the rotating disc. A plurality of positioning shaft holes and a plurality of clamping shaft holes are evenly distributed in the rotating disc in the circumferential direction of the rotating disc. Positioning shafts and clamping shafts are correspondingly placed in the positioning shaft holes and the clamping shaft holes respectively. The working disc and the rotating disc are each provided with scale marks. The number of the scale marks on the rotating disc is larger than the number of the scale marks on the working disc. Through the position relation between the zero scale mark on the working disc and the zero scale mark on the rotating disc and through the scale marks, coinciding with the scale marks on the working disc, of the rotating disc, the rotation angle of the rotating disc can be obtained.

The invention discloses a connecting-rod-type bending device for bending steel in a steel forming machine. The connecting-rod-type bending device for bending the steel in the steel forming machine comprises a hinged pin shaft, a locating pin, a push rod, a connecting rod, a pin shaft thrust base and a hinged plate. The push rod, the connecting rod, the pin shaft thrust base and the hinged plate are sequentially connected in a hinged mode. The hinged plate is provided with an inner limiting pin which is used for limiting the inner rotation distance of the pin shaft thrust base and an outer limiting pin which is used for limiting the external rotation distance of the pin shaft thrust base. An inner clamping part and an outer clamping part are correspondingly arranged on the pin shaft thrust base. A location pin is arranged on the pin shaft thrust base. When steel is bent, the locating pin is pushed by the pin shaft thrust base to move forward a certain distance and matched with the hinged pin shaft to tightly press the steel, and the inner limiting pin is enabled to reach the inner clamping part. The pin shaft thrust base is stressed to move forward and the hinged plate is driven to swing. At the same time, the locating pin rotates around the hinged pin shaft to bend the steel. The connecting-rod-type bending device for bending the steel in the steel forming machine has the advantages that the distance between the hinged pin shaft and the locating pin can be changed when the steel is bent, and requirements for high working efficiency and high bending accuracy are simultaneously met when the steel is bent.

The invention discloses a steel bar bending machine and relates to the technical field of steel bar bending molding equipment. The invention aims to provide the steel bar bending machine capable of processing steel bars with different bending radii. According to the technical scheme, the steel bar bending machine comprises a working plate located at the top part of a machine body, positioning shafts and clamping shafts, wherein the working plate comprises a fixed plate and a rotating plate, the rotating plate and a driving device inside the machine body are connected and the rotating plate rotates around the axial line of the rotating plate, a plurality of positioning shaft holes and clamping shaft holes are evenly formed in the rotating plate and along the peripheral direction of the rotating plate, the positioning shaft holes form a plurality of concentric circles on the rotating plate, the positioning shafts and the clamping shafts are respectively and correspondingly placed inside the positioning shaft holes and the clamping shaft holes, a pin stopping hole is formed in the fixed plate, and a pin stopping shaft is arranged inside the pin stopping hole. The positioning shaft holes form the concentric circles on the rotating plate, the steel bars with different bending radii can be processed aiming at the positioning shaft holes of different diameters, and the application range of the steel bar bending machine is enlarged. The steel bar bending machine is suitable for serving as a steel bar bending machine.