79results about How to "Adjustable pressing force" patented technology

The recording apparatus includes: an image forming device which deposits ink onto a recoding medium to form an image; a conveyance device which conveys the recording medium in a recording medium conveyance direction at a recording medium conveyance speed; a pressing member which presses the recording medium on which the ink has been deposited, onto the conveyance device; and a pushing device which pushes the pressing member to press the recording medium to suppress cockling occurring in the recording medium on which the ink has been deposited, the pushing device having a spring constant k that satisfies48EI(1 / f)3<k<v·2At·48EI(1 / f)3,where EI is a flexural rigidity of the recording medium, t is a thickness of the recording medium, v is the recording medium conveyance speed, A is an amplitude of the cockling in the recording medium, and f is a frequency of the cockling in the recording medium along the recording medium conveyance direction.

The invention belongs to the technical field of sewing machines and particularly relates to a novel template sewing machine. The novel template sewing machine comprises a machine shell, the machine shell is provided with a cloth drag mechanism, a template photoelectric sensor and a controller, a needle plate of the template sewing machine is provided with a lower guide sleeve, a sewing needle penetrates through the lower guide sleeve, a thread is hooked by the lower guide sleeve, and the lower guide sleeve can be embedded in a guide groove in a template to be adapted. The novel template sewing machine further comprises an induction device. The induction device is used for sending out a control signal to the controller when it is detected that the sewing needle penetrates out of cloth upwards, and the controller controls a stepping motor of the cloth drag mechanism to be started according to the signal; the induction device sends out a control signal to the controller when the sewing needle penetrates into the cloth downwards, the controller controls the stepping motor of the cloth drag mechanism to be suspended according to the signal, and a motor shaft of the stepping motor drives a drag wheel to rotate through a universal coupling. When the sewing needle penetrates into the cloth, the cloth drag mechanism can be controlled by the controller to be suspended, so that cloth tear caused by non-correspondence of the cloth drag mechanism and the sewing needle is avoided.

The invention relates to a special tool clamp for friction stir welding of complex welding seam aluminum alloy. The special tool clamp comprises a friction stir welding workbench, a friction stir welding machine head and a stirring head, wherein: a clamp base is fixedly connected to the friction stir welding workbench; the clamp base is provided with an X / Y axis direction limiting mechanism; a welded workpiece is placed in the X / Y axis direction limiting mechanism; the upper surface of the welded workpiece is in rolling pressure connection with a workpiece pressing mechanism; the workpiece pressing mechanism slides on the clamp base along the X-axis direction of the friction stir welding; and the workpiece pressing mechanism is driven by a variable speed and adjustable speed motor. The special tool clamp for friction stir welding of complex welding seam aluminum alloy, provided by the invention, has the advantages that: a plurality of pressing wheels which can roll on the surface of the welding seam for pressing are adopted, the pressing force and the pressing position of the pressing wheels are adjustable, and the pressing wheels can move along with the movement of the stirring head, thereby ensuring the distance between the pressing point and the welding seam and ensuring that the pressing wheels do not interfere with the stirring head; and special tool clamp for friction stir welding of complex welding seam aluminum alloy can make the welding seam continuous, and improve the welding seam quality and the processing efficiency.

The invention relates to a compressing device for single-side spot welding of a stainless steel sidewall, a spot welding machine and a welding process. The spot welding machine comprises a welder gantry, a welding platform, and spot welding electrodes. The welding platform is used for holding a sidewall to be welded. The compressing device is disposed on the welding platform and comprises two vertical posts arranged on two sides of the welding platform, and a cross beam crossing over the welding platform and connecting the two vertical posts. The cross beam is provided with a plurality of compressing parts used for compressing the sidewall. The vertical posts are movably connected with the welding platform. A frame and a wallboard are integrally compressed with the compressing device, the frame is tightly attached to the outer face of the wallboard and the platform, corrugated deformation of a workpiece is eliminated by pressure of an air cylinder, the wallboard and the frame form a whole after spot welding, and the whole is higher in rigidity; after compressing force is removed, the outer surface can still be even and flatness is improved.

The invention discloses a roller adjusting device, an adjusting method and application of the device and a bending machine comprising the device, and belongs to the technical field of bending machines. The roller adjusting device is mounted on a cylinder of the bending machine; the roller adjusting device comprises a mounting base, a roller component and an adjusting component; the roller component is connected with the mounting base through the adjusting component; the adjusting component can be used for adjusting the roller component to move forwards and backwards relative to the mounting base; the roller component is in contact with a sliding block; the adjusting component comprises an adjusting thread sleeve, an adjusting screw nut and an adjusting screw; the adjusting thread sleeve is of a tubular structure and is in threaded connection with the mounting base; the adjusting screw nut sleeves the adjusting thread sleeve; the adjusting screw penetrates through the adjusting thread sleeve and is connected with the roller component. According to the adjusting method of the roller adjusting device, the roller component is adjusted by the adjusting component to move forwards and backwards so as to press the sliding block. By adopting the roller adjusting device, vibration of the sliding block can be alleviated in bending operation of a large-tonnage bending machine (the bending force is greater than 300t), the bending precision can be improved, the product pass percentage can be increased, and the service life of a cylinder can be prolonged.

The invention provides an intermittent press-fitting device and belongs to the technical field of machining. The intermittent press-fitting device comprises a press-fitting platform, a clamping mechanism and a press-fitting mechanism. The press-fitting platform is fixed to one side of a rack. A rear supporting cushion block of the clamping mechanism is fixed to the press-fitting platform and located behind a workpiece. A left clamping assembly and a right clamping assembly are symmetrically arranged on the left side and the right side of the workpiece. A driving cylinder of the press-fitting mechanism comprises a cylinder block, a piston rod, a connecting support lug and a lock nut. The lower end of the cylinder block is hinged to a cylinder supporting seat. The cylinder supporting seat is fixed to one side of a supporting base. The connecting support lug is in threaded connection with the upper end of the piston rod and is locked through the lock nut. The connecting support lug is hinged to one end of a pressing plate fulcrum bar. A pressing plate is arranged at the other end of the pressing plate fulcrum bar. The upper ends of two rocking bars are hinged to the pressing plate fulcrum bar. The lower ends of the rocking bars are hinged to the rack. The intermittent press-fitting device can conduct intermittent press-fitting on the workpiece, and is reasonable in structure, adjustable in press-fitting force and high in applicability.

A throttle grip apparatus is provided with: a throttle grip (1) rotatably mounted on a leading end of a handle bar (H) of a vehicle; a magnet (6) rotatable together with the throttle grip (1); a detector (13) for detecting variations in a magnetic field of the magnet (6) in a non-contact manner to detect a rotation angle of the throttle grip (1); and a frictional plate (9, 10) for generating a rotation load of the throttle grip (1). An engine of the vehicle is controlled based on a detected value of the detector (13). The frictional plate (9, 10) is disposed within the handle bar (H).

A medical instrument effectively suppresses a situation in which the edge of a blade springs immediately after completion of incision, excision, or the like. The medical instrument (1) includes manipulation members (14) that are held by a user, elastic members (11) that are respectively secured on one end of the manipulation members, and intersect each other at one end thereof, and opening-closing members (15) that are respectively secured on the other end of the manipulation members (14), and intersect each other at a pivot (13), functional parts (15a) for implementing a gripping operation, a holding operation, a cutting operation, or the like being respectively provided at one end of the opening-closing members (15), the functional parts (15a) being opened and closed by adjusting a pressing force applied to the manipulation members (14), the opening-closing members (15), the manipulation members (14), and the elastic members (11) being configured so that the pressing force applied to the manipulation members (14) and an opening-closing amount of the functional parts (15a) have a linear proportional relationship during a period in which the functional parts (15a) are operated.

The invention discloses an ultraprecise friction driving mechanism. The mechanism mainly comprises a driving part, an auxiliary support part, a pressing part and an eccentric pressing part, wherein stable and precise rotation positioning is provided by the driving part, a torque motor is directly connected with a friction driving shaft, a driving error caused by intermediate transmission links is reduced, a circular grating is connected to the other end of the driving shaft, and the angular precision of a driving wheel is measured; through the auxiliary support part, the deflection deformation of the tail end of a driven rod is reduced, the position precision of the driven rod is guaranteed, so as to achieve the effects of auxiliary support and fine-tuning positioning, wherein the displacement output by an eccentric wheel structure is converted into pressing force by a pressure reed, and a driving wheel system and a friction guide rod are pressed through a prepressing wheel system; through the eccentric pressing part, accurate displacement output can be provided for the pressure reed, the pressing force can be conveniently adjusted, and the change of the pressing force can be monitored in real time by a pressure sensor installed on an eccentric wheel driven component, so as to satisfy the controllable requirement on the pressing force.

The invention discloses an automatic brazing equipment for copper pipes and joints and a control method thereof. Welding machine; the copper tube delivery mechanism is used to deliver the copper tube to each station; the copper tube positioning mechanism includes a positioning plate and a pressing device for positioning and pressing the copper tube; the joint feeding and assembly The mechanism is used to grab the joint and put the joint on the end of the copper pipe; the socket detection mechanism is used to detect the socket effect of the sleeve joint operation; the high-frequency brazing machine is installed on the brazing machine sliding platform The outer side of the copper tube positioning mechanism is located at the brazing station. The invention can realize a series of operation processes such as automatic feeding and positioning of copper pipes, automatic grasping of joints, detection of sockets and defective sockets, and automatic brazing after that, so as to ensure the welding of copper pipes and joints during the automatic brazing process quality and easy operation.

This invention discloses a device for blanking and processing rubber sealed strip-type slot; essentially composed by counter die part, upper die part and oblique cutting part. It is characterized in adopting work piece outline of the counter die's surface and its end face's lateral positioning machine to actualize rapid and accurate position for work piece's feeding; the outline of pressing plate and counter die's surface individually furring with upper and lower surfaces of sealing strip to prevent its surface from destroying; pressing device of upper die mainly comprising adjusting screw rod, packing force adjusting nut, spring block, spring guide and connecting block, and being able to adjusting packing force of work piece; using inclined punching guiding block of the oblique cutting part to avoid interference of upper die to oblique punching tool. The invention has the advantages of simple structure, high processing quality and efficiency.