44results about How to "Eliminate springback" patented technology

The invention relates to a method for producing highly dimensionally accurate, deep-drawn half shells having a floor area (3) and a notch (2), wherein a preformed half shell (1) is first formed from a circuit board. The task of providing a method for producing highly dimensionally accurate half shells, with which highly dimensionally accurate half shells which can be easily welded to one another can be manufactured cost-effectively with minimal machined-based complexity, is achieved according to the invention in that due to the geometric shape the entire cross-section of the preformed half shell (1) has excess circuit board material, the entire cross-section is compressed by the excess material in the final shape thereof during reshaping of the preformed half shell (1) by way of at least one more pressing procedure into the finished half shell, and the finished half shell has an enlarged wall thickness substantially over the entire cross-section.

The invention relates to a method for producing highly dimensionally accurate, deep-drawn half shells having a floor area (3) and a notch (2), wherein a preformed half shell (1) is first formed from a circuit board. The task of providing a method for producing highly dimensionally accurate half shells, with which highly dimensionally accurate half shells which can be easily welded to one another can be manufactured cost-effectively with minimal machined-based complexity, is achieved according to the invention in that due to the geometric shape the entire cross-section of the preformed half shell (1) has excess circuit board material, the entire cross-section is compressed by the excess material in the final shape thereof during reshaping of the preformed half shell (1) by way of at least one more pressing procedure into the finished half shell, and the finished half shell has an enlarged wall thickness substantially over the entire cross-section.

The invention relates to a resilience-proof device for a bending die. The resilience-proof device for the bending die comprises a punch body, a blank to be bent and a cavity body. The axis of the punch body and the axis of the cavity body are in the same straight line. The tip of the punch body is provided with a protrusion portion with a semicircular top and both sides of the punch body are respectively provided with a chamfer. The lower end of the blank is in contact with a press plate, the lower portion of the press plate is connected to a spring, the top of the spring is connected to the press plate, and the bottom of the spring is connected to the bottom of a recess of the cavity body. The resilience-proof device for the bending die is reasonable in design; the tip of the punch is provided with the protrusion portion and is wedged into the inside bent portion of the blank during working for changing the stress state of the portion and restraining the back-moving trend of the portion unloaded after bending pressure; the press plate is arranged and connected to the spring at the lower end for preventing the blank from being unfitted to the punch body and the resilience during bending.

The invention provides an ultra-high strength steel thermal punching molding process and a molding die thereof. Before the thermal punching molding of ultra-high strength steel sheet, the thermal punching molding process is used for heating parts which are in contact with the ultra-high strength steel sheet in a die and need to be punched, so as to lead the surface temperature of the parts to reach or exceed martensite temperature of the ultra-high strength steel. Then, the ultra-high strength steel sheet which is heated to be totally austenitized is put in the die to be punched and molded. When closed, the thermal punching die is cooled. The die parts which are in contact with the molded parts are utilized for quenching the molded parts. The thermal punching molding die comprises a convex die, a concave die and a control unit. An electrothermal element and a cooling water channel are arranged in the convex die and the concave die. A temperature sensor is arranged in the convex die and the concave die. A reset switch and a pressure plate are respectively arranged on lateral sides of the concave die and the convex die. The ultra-high strength steel thermal punching molding process and the molding die thereof avoid cracks on surfaces and at the inner parts of the molded parts, eliminate the part molding resilience and ensure the precision and the quality of products.

The invention relates to a method for operating a conveyor belt (2) with a conveyor belt (4) and at least one drive roller (6) for driving the conveyor belt (4), wherein for changing the conveyor belt ( 4) at a speed controlled to act on the Torque (M) to drive the pulley (6).

The invention relates to a rubber sleeve press fitting facility with an automatic pressure keeping system and a press fitting method. The rubber sleeve press fitting facility comprises a driving device, a press head, guide sleeves, an operation platform frame, a starting switch and a time relay. The operation platform frame is used for allowing couplings to be placed. The output end of the drivingdevice is fixedly connected with the press head and used for driving the press head to move towards the operation platform frame. The press head is used for fixing rubber sleeves, pressing the rubbersleeves into the guide sleeves in sequence, enabling the rubber sleeves to penetrate through the guide sleeves arranged on the movement path of the press head, and then pressing the rubber sleeves into the couplings. The starting switch is electrically connected with the time relay and the driving device through wires, and used for controlling the start and stop of the driving device and controlling the driving device to drive the press head to keep the state of pressing the rubber sleeves in the couplings in the set time period. By the adoption of the rubber sleeve press fitting facility with the automatic pressure keeping system and the press fitting method, the purpose that after the rubber sleeves are pressed and installed, the pressure keeping time is accurately controlled is achieved, the phenomenon that due to the fact that a conventional press machine does not have the pressure keeping process, the rubber sleeves conduct springback movement is eliminated, the potential qualityhazard that due to the springback movement of the rubber sleeves, the press fitting sizes of the rubber sleeves cannot be controlled is eliminated, and the potential quality hazard which exists due to the fact that the pressure keeping time is excessively short is fundamentally eliminated.

The invention discloses a forming process of a straddle-type lawn mower dust cover. The dust cover is prepared by blanking punching-curved surface forming-positioning forming-segmenting-punching in sequence, so as to drop the material The shape of the product is positioned, and the curved surface is stamped and formed. At the same time, the electrode on the lower layer of the mold surface is heated to a high temperature and kept warm for 30‑50s to eliminate the springback of the curved surface. At the same time, the two ears set close to the horizontal line are punched and formed. All the products are divided into two, and the two protruding ears of the semi-finished product are punched. The invention designs a stepped curved surface according to the engine motor, has a compact structure and a beautiful appearance, protects the engine motor from being eroded by impurities, dust, rain, etc., and prolongs the service life of the mower.

The invention discloses a numerically-controlled machine tool enclosing plate machining process, and aims at solving the problem of same-direction bending of edges of an enclosing plate. According tothe technical scheme, the machining process is characterized in that the steps of material selecting, side edge bending, two-end bending, trimming forming and excess material cutting are sequentiallyconducted, and the enclosing plate which has the decoration effect is formed by an enclosing plate profile through the steps of one-time side edge bending, first-time two-end bending and second-time two-end bending. According to the numerically-controlled machine tool enclosing plate machining process, the four sides of the enclosing plate profile can be bent towards the same direction.