The main spindle device for a machine tool is provided with: a bearing for rotatably supporting the main spindle; a bearing case for holding the bearing; a housing inside which the bearing case is disposed; and a stiffness-switching device, which supports the bearing case with respect to the housing and is able to switch the stiffness of the bearing case support between multiple levels. When the stiffness-switching device is supporting the bearing case at a low stiffness, the main spindle device is formed so that the bearing case slides with respect to the housing. A friction member is disposed on the area where the bearing case slides with respect to the housing.

Main spindle device for machine tool and machine tool

The invention belongs to the technical field of gear machining equipment, and discloses a precise centering device of a gear The precise centering device comprises a centering mechanism and a location mechanism, wherein the centering mechanism comprises a support, a through hole is formed in the support, a centering shaft is connected in the through hole in a slidable mode, a groove which is communicated with the through hole is formed in the support, a handle is arranged on the centering shaft, one end of the centering shaft is provided with an adjusting screw nut, the position, between the adjusting screw nut and the through hole, on the centering shaft, is provided with a spring, a stand is arranged on the support, a mounting rack is arranged on the support, a transmission switch which is matched with the centering shaft is arranged on the mounting rack, the location mechanism comprises a base made from rubber and a water storage groove which is formed in the base, water is injected into the water storage groove, the inner walls of the water storage groove are all provided with first magnets, each of the first magnets is hinged to the corresponding inner side wall of the water storage, each of the outer sides walls of the support is provided with second magnets of which the magnetism is opposite to that of the first magnets According to the precise centering device of the gear, the problems that in the prior art centering is inaccurate, the gear of the processed gear is low, and defective percentage is high are solved

Precise centering device of gear

Processing method using single-sided hobbing inverse bevel gear of hobbing machine

The invention discloses a gear-shaving machine for a gear shaft. The gear-shaving machine comprises a machine base, wherein a rotary seat is rotatably connected onto the machine base; a locking part for fixing the lower end of a rotary shaft is arranged on the rotary seat; a mounting base is horizontally arranged on the inner side wall of a support seat; a mounting rod is vertically arranged on the mounting base; a sliding sleeve is in sliding fit with the outer wall of the mounting rod; a first bolt for compressing the mounting rod is in threaded connection with the sliding sleeve; a fixed rod is horizontally arranged on the outer wall of the sliding sleeve; a fixed seat is in sliding fit with the outer wall of the fixed rod; a second bolt for compressing the fixed rod is in threaded connection with the fixed seat; and a milling cutter against the lower surface of gear teeth is arranged on the fixed seat. The gear-shaving machine has the following advantages and effects: the milling cutter is additionally arranged on the gear-shaving machine to realize gear shaving operation and burr trimming operation of the gear shaft, so that the labor intensity of a worker is greatly lowered,and the processing efficiency of the gear shaft is also improved.

Gear-shaving machine for gear shaft

The invention relates to a bothway cutter back-off automatic switching mechanism of a gear shaping machine. The bothway cutter back-off automatic switching mechanism comprises a machine base, a knife rest body is hinged to the machine base through a pin shaft, a knife rest rod can be slidingly installed in the knife rest body in the axial direction, a crank sliding block mechanism is hinged to the knife rest rod, a transmission shaft driven by a driving device to rotate is connected with the crank sliding block mechanism, a cutter back-off roller is arranged on one side of the knife rest body, and spring damp is arranged on the other side of the knife rest body. The transmission shaft is connected with a cutter back-off shaft through a transmission mechanism to be used for enabling a first cutter back-off cam and a second cutter back-off cam which are matched with the cutter back-off roller to be slidingly installed on the cutter back-of shaft in the axial direction, the first cutter back-off cam and the second cutter back-off cam rotate along with rotation of the cutter back-off shaft, and the first cutter back-off cam and the second cutter back-off cam are connected with a switching cylinder which drives the first cutter back-off cam and the second cutter back-off cam to slide. According to the bothway cutter back-off automatic switching mechanism, the switching cylinder is adopted to switch the first cutter back-off cam and the second cutter back-off cam which are matched with the cutter back-off roller, and therefore automatic switching between internal gears and external gears when the gear shaping is carried out is achieved. Automatic control is quite easy to achieve.

Bothway cutter back-off automatic switching mechanism of gear shaping machine

The utility model discloses a screw wheel cutting mechanism with gear shapers, belonging to parts of a gear shaper, which mainly comprises rail plate on which provided fixed and movable fit strips, on the movable fit strip is provided an adjusting shim, and on the rail shaper a helicoids, on the fixed and movable fit strips a similar helicoids also. On the mechanism of rail plate is provided a helicoids, and on the fixed and movable fit strips a similar helicoids also, which makes the rail plate additional whirligig along helicoids when moved up and sown in cutting to accomplish the cutting process of a screw wheel.

Mechanism of gear slotting machine for processing helix gear

The utility model relates to a structure for a rotating spindle of a machine tool The structure comprises a base, wherein a spindle bearing is arranged on a bearing seat on the base; a spindle is arranged on the spindle bearing; a worm is matched with a worm wheel; and the worm wheel is connected with the spindle By the structure for the rotating spindle of the machine tool, the spindle is positioned and rotating accuracy is ensured by the special high-accuracy spindle bearing, the whole structure is easy to machine and assemble, manual scraping workload is low, and the accuracy is easy to ensure By the spindle of the machine tool, the rotating accuracy can be improved by one stage

Structure for rotating spindle of machine tool

The utility model discloses a back taper gear machining device for gear shaping machines The device mainly includes a platform seat, a rotary shell and a transmission chain The rotary shell may be rotated around the platform seat through a rotary support shaft, the transmission shaft is connected with the rotary support shaft through a bevel gear, and the rotary support shaft is connected with the shaft through fitted gear unit The rotary support shaft fitted with the rotary shell can precisely ensure position of the engaging center of the transmission gear, ensure the transmission chain not interfered after rotation, and ensure machining precision of the back taper gear

Shaping back taper gear apparatus of gear shaping machine

The utility model discloses a novel go to burr mechanism of tooth portion, it includes that horizontal oil cylinder personally experiences sth. Part of the body, the internal portion of horizontal oil cylinder is through installing horizontal piston rod, horizontal piston rod and horizontal oil cylinder body sliding fit's position is installed and is prevented horizontal piston rod pivoted horizontal guiding mechanism, installs the unhairing bayonet at the head of horizontal piston rod, the vertical displacement mechanism that is used for adjusting the upper and lower stroke of unhairing bayonet is installed to the bottom of the horizontal oil cylinder body. This structure overcome getting rid of of behind gear machining tooth portion burr adopt artifical manual get rid of clean, the quality is unstable, increases by one turning process and gets rid of tooth portion burr, has increased gear machining's cost, the management is inconvenient shortcoming also, adopt the neotype tooth portion burr method of going, the burr is got rid of totally, the steady quality, has reduced the processing cost, processes, assembles simplyr.

Novel go to burr mechanism of tooth portion

The utility model discloses a linear motion clamping mechanism, it includes the bearing, the inside sliding fit of bearing installs the compact heap, the cooperation that contacts of the outside terminal surface of compact heap and the terminal surface of guide rail, the inside facing (operation) of compact heap has the wedge face, the wedge face constitutes wedge locking transmission coordination with the inclined plane of piston, the bottom of piston sets up in the internal portion of piston cylinder, the bottom end of piston installs disc spring no. 1, disc spring no. 1 encapsulates in the internal portion of piston cylinder through the gland, has the through -hole in the processing of the inclined plane position of piston, installs the screw in inside running through of through -hole, the head of screw passes through screw -thread fit to be fixed on the compact heap, installs resetting means at its afterbody. This mechanism has overcome traditional guides motion and has not generally adopted clamping device, relies on the rigidity of transmission lead screw or guide rail clip's frictional force to cause the moving part precision unstable, shortcoming that the motion clearance was also hardly controlled.

Xiang Guangxiang

Papers

Mechanism of gear slotting machine for processing helix gear

Structure for rotating spindle of machine tool

Shaping back taper gear apparatus of gear shaping machine

Novel go to burr mechanism of tooth portion

Linear motion clamping mechanism