49results about How to "Even distribution of clamping force" patented technology

The invention discloses a multipoint profiling rigid clamp, comprising a clamp body. The clamp body is provided with a positioning surface for positioning a processed workpiece; the positioning surface is provided with a vacuum sucker; the clamp body is internally provided with a vacuum hole channel; one end of the vacuum hole channel is connected with the vacuum sucker, and the other end of the vacuum hole channel is connected with a vacuum valve island arranged at the outer part of the clamp body; the vacuum valve island is connected with a vacuum system connected with a control system; andthe vacuum hole channel is also connected with the control system by a vacuum sensor. A method for processing a thin-wall workpiece by using the multipoint profiling rigid clamp comprises the steps of: modeling, analyzing, determining and optimizing key positioning points, arranging the vacuum sucker, processing the positioning surface of the clamping body and finally carrying out processing on the thin-wall workpiece. The multipoint profiling rigid clamp is used for a high-speed milling finish processing stage of the complex profile of the thin-wall workpiece, the positioning surface of the clamp is consistent to the surface type of the processed workpiece, the uniform distribution of a clamping force is guaranteed and the clamping and the deformation of the thin-wall workpiece are avoided.

The invention discloses a special fixture for tenon root machining for the blade of an aviation engine. According to the fixture, one-time clamping and six-point location are adopted, vibration attenuation is carried out on the contact part of each location pin head and the blade through a resin material, and vibration can be effectively suppressed in a machining process, so that the deformation of the tenon root part of the blade during machining is reduced, and damage is avoided; and the fixture realizes location and clamping for the blade through the buckling of an upper cover and a base. Arotary workbench is connected with a machine tool, a main shaft rotates to drive the rotary workbench and the fixture to rotate, and continuous machining for the whole tenon root is completed throughone-time clamping; and a clamping nut drives a floating slide block to clamp under a clamping force, and adequate contact and the balanced clamping force are ensured while clamping is ensured. The fixture carries out rapid location and clamping for the blade body part of the blade in a blade clamping process, is simple in structure, high in location accuracy, and convenient and fast in blade installation-detachment operation, and effectively saves time and cost on the premise of ensuring the machining quality, thereby realizing efficient batch production for blades.

The invention relates to a clamping and sealing clamp, in particular to a clamping and sealing clamp for the end of a pipe in order to solve the problems that due to the fact that clamping and sealing are mutually independent in an existing pipe tensioning-expanding test experiment and are mutually affected when in use, smooth conduction of the experiment is difficult to guarantee, clamping and sealing of the pipe can not be effectively combined, and the accuracy of the pipe performance experiment is affected. The clamping and sealing clamp comprises a mandrel, a sealing ring, a wedge-shaped block, a carrier plate, a screwing part, an elastic element, an outer clamping ring, N wedge-shaped inner claws, N wedge-shaped outer claws and N ejection rods. The screwing part is in threaded connection with the other end of the mandrel. The mandrel is sleeved with the outer clamping ring. The wedge-shaped block, the N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged between the outer clamping ring and the mandrel. The N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged in the peripheral direction of the mandrel. The part, between the screwing part and the outer clamping ring, of the mandrel is sleeved with the carrier plate and the elastic element. The elastic element abuts against the carrier plate and the outer clamping ring. The clamping and sealing clamp is used for clamping and sealing the end of the pipe during a pipe tensioning-expanding test experiment.

The invention provides a convenient floating clamp, belonging to the technical field of machinery. The convenient floating clamp comprises a fixed turnplate with a hollow structure, a movable turnplate movably arranged behind the fixed turnplate and a top tip coaxial with the fixed turnplate; three involute clamping jaws around the axial line of the fixed turnplate are arranged in front of the fixed turnplate and respectively connected with the movable turnplate; the movable turnplate is capable of driving the three clamping jaws to swing, so that the three clamping jaws are gathered inward or expanded outward; a fisheye bearing is installed at the middle part of the fixed turnplate; the top tip is penetrated in the movable turnplate and the fisheye bearing in sequence and partially stretches out of the fixed turnplate. The convenient floating clamp has good clamping effect and a fine-tuning function.

The invention relates to mechanical clamping mechanisms, in particular to a three-sided stable clamping mechanism. The three-sided stable clamping mechanism comprises a rack, an output shaft driven by a motor is arranged on the rack, the output shaft is connected with a horizontal clutch, the horizontal clutch is connected with a screw, the screw is meshed with a gear, the gear is meshed with an equal-sized second gear, the gear is connected with a horizontal first clamping jaw through a rotating shaft, and the second gear is connected with a horizontal second clamping jaw through another rotating shaft, wherein the output shaft is fixedly sleeved with a vertical gear, the vertical gear is connected with a vertical clutch, and the vertical clutch is connected with a vertical clamping jaw. The invention aims at providing the clamping mechanism which is fast to clamp and more stable.

The invention discloses a clamping method and a clamping device for an irregular non-metal workpiece. A T-shaped groove workbench of a positioning mechanism of the irregular non-metal workpiece to be processed is arranged on the bottom surface of a cooling groove; and a condensing pipe and a heating pipe are arranged on the four inner side faces of the cooling groove respectively and are connected with a refrigerating device and a heating device respectively. The method comprises the following steps of: positioning the irregular non-metal workpiece to be processed on the positioning mechanism and fixing the irregular non-metal workpiece and the positioning mechanism together on the bottom surface of the cooling groove; filling water into the cooling groove; starting the refrigerating device, condensing the water in the cooling groove into ice through the condensing pipe, and clamping the workpiece; and after processing the cooling groove in which the workpiece is clamped on a processing machine tool, starting the heating device, melting the ice in the cooling groove into water through the heating pipe and then taking the workpiece out. The clamping method is simple in operation and reliable in clamping effect and can ensure uniform clamping force applied to the workpiece so as to effectively ensure the processing precision.

The invention provides a CNC (computer numerical control) grinding machine and belongs to the technical field of machinery. The CNC grinding machine comprises a frame, a grinding tool and a bench movably mounted on the frame. The frame includes a conveying area and a processing area sequentially from front to rear. An incoming mechanism and a conveying mechanism are disposed in the conveying area. A spindle box and a discharging mechanism are disposed in the processing area. The discharging mechanism and the incoming mechanism are disposed on two sides of the spindle box. The conveying mechanism is disposed over the incoming mechanism and can linearly reciprocate between the incoming mechanism and the spindle box. A floating chuck is mounted on the spindle box. The frame is provided with an ejector base arranged right in front of the spindle box. The grinding tool is movably mounted right in rear of the spindle box. The spindle box is fixedly connected with the bench. The ejector base is disposed over the bench. The frame is further provided with a first drive motor and a second drive motor; the first drive motor can control the grinding tool to linearly move in the horizontal direction; the second drive motor can control the bench to linearly slide. The CNC grinding machine has the advantages of high automation level and operational convenience.

The invention relates to a clamping device, in particular to a rotary inner clamping device. The device comprises a cylindrical clamp main body, wherein a ring of uniformly distributed clamping jaws are hinged at the circumference of the clamp main body; the clamping jaws radially rotate along the clamp main body; a driven end of each of the clamping jaws is used for clamping inner holes of a clamping workpiece, and a driving end of the clamping jaw is butted against the lower edge of a cam ring sleeved on the clamp main body; the upper edge of the cam ring is horizontally and slidingly matched with a convex ring arranged on the clamp main body; cams butted against the driving end of the clamping jaw are arranged at the lower edge of the cam ring; and a hole for inserting a handle is formed at the outer edge of the cam ring. By adopting the technical scheme, the rotary inner clamping device is simple in structure, convenient to operate and low in cost.

The invention belongs to the field of clamps, particularly discloses a tool clamp for machining a thin-wall workpiece, and aims to solve the problems that an existing tool clamp difficultly clamps thethin-wall workpiece and serious deformation of the thin-wall workpiece is easily caused. According to the tool clamp for machining the thin-wall workpiece, a sliding block can be driven by a machinetool pull rod to move towards the side away from a clamp disc in a sliding block cavity and compress a spring, then an elastic clamping sleeve moves along with the sliding block, a sleeve opening of the elastic clamping sleeve stretches out of a clamping piece hole, the inner diameter is increased, and the thin-wall workpiece can be conveniently installed; then the machine tool pull rod returns, and the sliding block can be driven to move towards the side close to the clamp disc in the sliding block cavity through the spring in a compressed state; and the elastic clamping sleeve moves along with the sliding block, the sleeve opening of the elastic clamping sleeve retracts into the clamping piece hole, the inner diameter is reduced, the outer wall of the thin-wall workpiece is wrapped and clamped, clamping force is evenly distributed, due to the fact that the elastic force of the spring is fixed, too large clamping force cannot be generated on the thin-wall workpiece, and therefore thethin-wall workpiece cannot deform basically.

The invention discloses a steel tube traction machine. The machine comprises a rack, a main drive shaft and a driven shaft, two chains which are arranged opposite to each other in front and at the back, a guide support, a chuck opening support and a plurality of chuck parts, wherein two horizontal guide blocks and two clamping guide plates are arranged opposite to each other in the front and at the back of the guide support; each of the chuck parts comprises a sliding plate, a first chuck base, a second chuck base and a chuck; two ends of the sliding plate are connected fixedly with chain plates of the chains and are provided with a guide roller assembly which is matched with the horizontal guide blocks; the first chuck base and the second chuck base are connected with the sliding plates in a sliding mode opposite to each other in the front and at the back and are provided with a chuck opening roller assembly which is matched with the chuck opening support, an opposite end is provided with a chuck installation portion respectively, and the other end is provided with a first clamping roller assembly and a second clamping roller assembly, which are matched with the clamping guide plates respectively, except the chuck which is matched with a pipe fitting with a maximum specification, a plurality of sub-chucks are overlapped to form the other chucks. The steel tube traction machine relates to the field of manufacture devices of steel-plastic composites pipes and has the advantages of being simple in structure, convenient in centering adjustment, high in accuracy, even in clamping force distribution and convenient in pipe fitting specification conversion.

The invention provides a fully-automatic grinder, belongs to the technical field of machinery, and solves the problem that an existing grinder is large in floor area. The fully-automatic grinder comprises a frame, the frame is divided into a conveying area and a machining area sequentially from front to back, an incoming mechanism and a feeding mechanism are arranged in the conveying area, a spindle box and a discharging mechanism are arranged in the machining area, the discharging mechanism and the incoming mechanism are arranged on two sides of the spindle box respectively, the feeding mechanism is arranged over the incoming mechanism and capable of linearly reciprocating between the incoming mechanism and the spindle box, a floating chuck is mounted on the spindle box, and an ejection seat is further arranged on the frame and located right ahead the spindle box. The fully-automatic grinder has the advantages of small floor area and high automation degree.

The invention discloses a fast clamping system. The fast clamping system comprises a pedestal with a hanger, clamp fixing bases and clamps, wherein the clamp fixing bases and the clamps are movably fixed to the hanger. The clamp fixing bases are provided with mounting grooves matched with the corresponding clamps. Each clamp comprises a fastening screw rod with the two ends being provided with threads and dovetail clamping blocks located at the two ends of the fastening screw rod. The dovetail clamping blocks comprise positioning parts which are matched with the mounting grooves in the clamp fixing bases for positioning and clamping parts with dovetail structures. The positioning parts of the dovetail clamping blocks are screwed at the two ends of the corresponding fastening screw rods separately. By adoption of the fast clamping system, the multi-operation, multi-position and multi-part machining requirements can be met, and clamping rigidity is good; moreover, clamping force is evenly distributed, predeformation of parts is reduced and machining precision is improved; and the adaptability is high, the parts and the surfaces of the fixing bases can be tightly attached easily through the clamping blocks, and there is no need for workers to inspect the fitness of the bottom faces of the parts.

The invention discloses an anchorage clip for a steel strand fatigue test. The anchorage clip comprises a plurality of clip bodies and clamping slots, wherein the plurality of clip bodies are enclosed together and can be extruded towards the axes; the outer surfaces of the plurality of clip bodies are spliced into a conical surface in which the front is narrow and the rear is wide, and the inner surfaces are enclosed into a cylinder; a circle of tightening spring fixing slots are arranged at the rear part of the conical surface; annular teeth are arranged at the inner surfaces of the clip bodies at the rear parts of the clamping slots; a plurality of annular pressure relief grooves which are arranged in parallel and at intervals are arranged on the inner surfaces of the clip bodies at the middle parts and the front parts of the clamping slots; a guide section is arranged at the front part of each clamping slot. The anchorage clip for the steel strand fatigue test has the beneficial effects of being firm and reliable in clamping a steel strand, and free of damage, the clamping force of the clip bodies on the steel strand is even in distribution by adopting the annular pressure relief grooves, a fatigue source is avoided, a fatigue fracture of the steel strand caused by clamping is prevented, the fatigue property of the steel strand can be correctly evaluated, meanwhile, the clip bodies are protected, and the service life is prolonged.

The invention provides a novel floating chuck, and belongs to the technical field of machinery. The floating chuck comprises an enclosure and a clamping mechanism for clamping a workpiece, wherein the clamping mechanism comprises a fixed seat and a driving disc; a main clamping part and a plurality of auxiliary clamping parts are arranged in front of the fixed seat; each auxiliary clamping part is fixedly arranged on the fixed seat; the front end of the main clamping part is hinged to the fixed seat, and the tail end of the main clamping part is connected with the driving disc; the fixed seat is movably connected with the enclosure through a plurality of floating regulation parts; the main clamping part can be driven by the driving disc to circumferentially swing, so that the front end of the main clamping part rotates around the hinging point; the fixed seat is driven by the main clamping part to be circumferentially displaced within a preset circumferential floating range; the fixed seat and each auxiliary clamping part are gathered towards the workpiece or move far away from the workpiece; a braking mechanism connected with the enclosure and used for braking the enclosure is arranged on the periphery of the enclosure. The floating chuck has the advantages of good clamping effects and floating regulation function.

The invention provides a clamping mechanism of a floating clamping head and belongs to the technical field of machinery. The clamping mechanism comprises a shell, a fixing seat and a driving disc, the fixing seat is arranged in the shell and is of a hollow structure, the driving disc is movably mounted in rear of the shell, a main clamping member and a plurality of auxiliary clamping members which are arranged around axis of the fixing seat are arranged in front of the fixing seat, each auxiliary clamping member is fixedly arranged on the fixing seat, the head end of the main clamping member is connected on the fixing seat in a hinged manner while the tail end of the same is connected with the driving disc, and the driving disc can drive the main clamping member to swing circumferentially to enable the head end of the main clamping member to rotate around a hinged point and drive the fixing seat to drive the auxiliary clamping members to gather together towards or be away from a workpiece. The clamping mechanism has the advantages of reasonable layout and good clamping effect.

The invention provides an industrial machining clamp. The industrial machining clamp is large in clamping area and good in guiding effect. The industrial machining clamp comprises a bottom disc seat,mounting seats and a base. The mounting seats are arranged at the two sides of the bottom disc seat, and the mounting seats and the bottom disc seat are of an integrated structure. The base is mountedabove the bottom disc seat, and the bottom of the base is mounted at the inner side of the bottom disc seat in an embedded manner. A clamping handle is mounted on the base in an embedded manner. A first support seat is arranged at one side of the top end of the base in a welded manner, and a second support seat is arranged at the other side of the top end of the base in a welded manner. The industrial machining clamp is improved and has the advantages of being novel in structure, reasonable in design, large in clamping area, capable of meeting clamping requirements of different workpieces, wide in application scope, good in guiding effect, not prone to clamping position deviation, uniform in clamping force distribution, good in clamping effect and great in practicability; and thus, problems in the background art are effective solved, and defects in the background art are effectively overcome.

The invention relates to a centering clamp for a friction welding steel claw. The centering clamp for the friction welding steel claw can enable clamping force to be evenly distributed, reduce welding vibration and improve clamping efficiency and welding efficiency, so that electrolytic aluminum welding quality is improved, welding time is shortened, and economic benefits of enterprises are improved. The clamp comprises a clamp body (1), steel claw cores (3), a pull rod (6) and a steel claw (7), before friction welding, the steel claw is placed in an inner hole of the clamp body, the right side walls of the steel claw cores and the inner hole of the clamp body have the same taper, the inner hole surface formed by the inner surfaces of the steel claw cores makes contact with the outer circle of the steel claw, and the effects of positioning and clamping are achieved during clamping; and the left part of each steel claw core is connected with the pull rod which is connected with an oil cylinder. In the welding process, the steel claw cores are driven by the pull rod to move leftwards, and the multiple steel claw cores move leftwards and contract towards the center in parallel to clamp the steel claw; and after welding is completed, the oil cylinder pushes the pull rod to enable the steel claw cores to move rightwards, and the steel claw is loosened.

The invention discloses a supporting roller inner hole machining device and a machining method thereof, and belongs to the technical field of machining. The supporting roller inner hole machining device comprises a grinding machine body, wherein a motor box and a center frame are arranged on the grinding machine body, a connecting plate is arranged on one side, close to the center frame, of the motor box, a main shaft of the grinding machine body penetrates through a connecting disc to be connected with a flange sleeve, the flange sleeve is used for installing a workpiece, at least two groupsof grooves are formed in the flange sleeve, through holes are formed in the grooves, and locking screws penetrate through the through holes to lock the workpiece. According to the supporting roller inner hole machining device, at least two groups of grooves are formed in the flange sleeve, and the grooves are arranged at intervals and are matched with the locking screws to clamp and lock the workpiece, and the concentricity of an inner hole and an outer circle of a supporting roller is improved; and the inner hole is finely ground by adopting the device, so that the rotation precision of the supporting roller on the inner hole of the grinding machine is ensured.

The invention discloses an automatic clamping device for stainless steel wire mesh pipe fitting spot welding. The automatic clamping device comprises a mounting bottom plate, a forming device and a vertical movement device, wherein the forming device and the vertical movement device are arranged on the mounting bottom plate, a clamping device body is arranged in the forming device, and a welding mandrel device is arranged on the vertical movement device. Wire mesh blank is accurately positioned and formed through the forming device, so that the material forming precision is favorably improved;the clamping device composed of a plurality of clamping modules is adopted, so that the clamping force is distributed evenly, then the workpiece taking and placing efficiency can be improved, the clamping and welding auxiliary time is shortened, and the production efficiency is improved; and structurally speaking, the technical scheme has the advantages that the structure is simple and compact, the action is concise, the manufacturing is convenient, and the cost is low.

The invention relates to a clamping and sealing clamp, in particular to a clamping and sealing clamp for the end of a pipe in order to solve the problems that due to the fact that clamping and sealing are mutually independent in an existing pipe tensioning-expanding test experiment and are mutually affected when in use, smooth conduction of the experiment is difficult to guarantee, clamping and sealing of the pipe can not be effectively combined, and the accuracy of the pipe performance experiment is affected. The clamping and sealing clamp comprises a mandrel, a sealing ring, a wedge-shaped block, a carrier plate, a screwing part, an elastic element, an outer clamping ring, N wedge-shaped inner claws, N wedge-shaped outer claws and N ejection rods. The screwing part is in threaded connection with the other end of the mandrel. The mandrel is sleeved with the outer clamping ring. The wedge-shaped block, the N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged between the outer clamping ring and the mandrel. The N wedge-shaped inner claws and the N wedge-shaped outer claws are arranged in the peripheral direction of the mandrel. The part, between the screwing part and the outer clamping ring, of the mandrel is sleeved with the carrier plate and the elastic element. The elastic element abuts against the carrier plate and the outer clamping ring. The clamping and sealing clamp is used for clamping and sealing the end of the pipe during a pipe tensioning-expanding test experiment.

The invention provides a CNC (computer numerical control) grinding machine and belongs to the technical field of machinery. The CNC grinding machine comprises a frame, a grinding tool and a bench movably mounted on the frame. The frame includes a conveying area and a processing area sequentially from front to rear. An incoming mechanism and a conveying mechanism are disposed in the conveying area. A spindle box and a discharging mechanism are disposed in the processing area. The discharging mechanism and the incoming mechanism are disposed on two sides of the spindle box. The conveying mechanism is disposed over the incoming mechanism and can linearly reciprocate between the incoming mechanism and the spindle box. A floating chuck is mounted on the spindle box. The frame is provided with an ejector base arranged right in front of the spindle box. The grinding tool is movably mounted right in rear of the spindle box. The spindle box is fixedly connected with the bench. The ejector base is disposed over the bench. The frame is further provided with a first drive motor and a second drive motor; the first drive motor can control the grinding tool to linearly move in the horizontal direction; the second drive motor can control the bench to linearly slide. The CNC grinding machine has the advantages of high automation level and operational convenience.

The invention discloses a special fixture for tenon root machining for the blade of an aviation engine. According to the fixture, one-time clamping and six-point location are adopted, vibration attenuation is carried out on the contact part of each location pin head and the blade through a resin material, and vibration can be effectively suppressed in a machining process, so that the deformation of the tenon root part of the blade during machining is reduced, and damage is avoided; and the fixture realizes location and clamping for the blade through the buckling of an upper cover and a base. Arotary workbench is connected with a machine tool, a main shaft rotates to drive the rotary workbench and the fixture to rotate, and continuous machining for the whole tenon root is completed throughone-time clamping; and a clamping nut drives a floating slide block to clamp under a clamping force, and adequate contact and the balanced clamping force are ensured while clamping is ensured. The fixture carries out rapid location and clamping for the blade body part of the blade in a blade clamping process, is simple in structure, high in location accuracy, and convenient and fast in blade installation-detachment operation, and effectively saves time and cost on the premise of ensuring the machining quality, thereby realizing efficient batch production for blades.

The invention provides a floating clamp and belongs to the technical field of machinery. The floating clamp comprises a shell, a drive mechanism and a clamping mechanism for clamping a workpiece. The clamping mechanism comprises a hollow fixing seat disposed in the shell and a drive plate. A main clamping part and a plurality of auxiliary clamping parts are disposed in front of the fixing seat. The auxiliary clamping parts are respectively fixed on the fixing seat. The head end of the main clamping part is hinged to the fixing seat. The tail end of the main clamping part is connected with the drive plate. The fixing seat is movably connected with the shell through a plurality of floating adjusting parts. The drive plate can drive the main clamping part to swing peripherally so as to allow the head end of the main clamping part to rotate around a hinge point, the fixing seat is driven by the main clamping part to move peripherally in a preset peripheral floating range, and the fixing seat and the auxiliary clamping parts move close to or away from the workpiece. The drive mechanism is connected with the drive plate and can drive the same to rotate forwardly and reversely. The floating clamp is good in clamping effect and has a floating adjusting function.

The invention discloses a clamping device of a crawling robot. The clamping device of the crawling robot is characterized in that the clamping device comprises a support and electromagnetic clamping mechanisms arranged on the support; and each electromagnetic clamping mechanism is composed of a motor, an electromagnetic locking device, an electromagnet and a connecting rod, the motor is arranged at the lower end of the support, a motor spindle penetrates through the support and is connected with the electromagnetic locking device and the connecting rod in sequence, the electromagnet is fixedly arranged on the support and aligned with one end of the connecting rod, and the electromagnetic locking device, the motor and the electromagnet are connected with a control center. According to the clamping device, the portion, in contact with an object, of the tail end of each connecting rod is provided with a rubber block, so that friction force between the clamping device and the object is improved, meanwhile, the situation that the motors are damaged due to large torque at the moment of clamping is avoided, a buffer effect can be achieved, and the service life of the motors is prolonged.

The invention discloses a loader, and relates to the technical field of loaders. The loader comprises a lifting platform and a loading assembly, the loading assembly comprises a T-shaped support, an overturning assembly and a clamping assembly, and the clamping assembly comprises a loading barrel; sliding grooves are formed in the top and the bottom of the loading barrel, annular fluted discs are slidably connected to the bottoms in the sliding grooves, and a plurality of screws annularly penetrate through the loading barrel at equal intervals; a clamping plate is fixed to the end, located in the loading barrel, of the screw, a first gear meshed with the annular fluted disc is in threaded connection with the outer circle face of the end, located in the sliding groove, of the screw, and a gear ring is fixed to the outer circle face of the annular fluted disc. According to the present invention, a second gear is driven by the driving assembly to rotate, so that the screws on the loading barrel synchronously and horizontally move, the clamping plates are driven to synchronously move towards the outer wall of a barreled water barrel, the clamping force of the clamping plates on the outer wall of the barreled water barrel is evenly distributed, the barreled water barrel is well clamped, and the situation that the barreled water barrel is damaged, is effectively avoided.

The invention provides a convenient floating clamp, belonging to the technical field of machinery. The convenient floating clamp comprises a fixed turnplate with a hollow structure, a movable turnplate movably arranged behind the fixed turnplate and a top tip coaxial with the fixed turnplate; three involute clamping jaws around the axial line of the fixed turnplate are arranged in front of the fixed turnplate and respectively connected with the movable turnplate; the movable turnplate is capable of driving the three clamping jaws to swing, so that the three clamping jaws are gathered inward or expanded outward; a fisheye bearing is installed at the middle part of the fixed turnplate; the top tip is penetrated in the movable turnplate and the fisheye bearing in sequence and partially stretches out of the fixed turnplate. The convenient floating clamp has good clamping effect and a fine-tuning function.