The purpose of this study is to achieve machining of a split equal-base circle bevel gear. Based on the equal-base circle bevel gear theory, a cutting coordinate system for the separate piece is developed, and the tooth surface processing path of the separate piece is analysed and planned. According to the working principle of the equal-base circle bevel gear, by analysing the cutter position and posture, the calculation method for the angle between the wheel blank coordinate system and the fixed space coordinate system is derived when machining the separate piece for different spiral angles as well as various concavity and convexity properties. The explicit function expressions for the cutter centre coordinates and axis vectors for machining the separate piece are obtained. Using MATLAB, the tool position model is verified by means of calculation, and the tooth cutting simulation of the separate piece is carried out using VERICUT software. By machining experiment and tooth surface measurement analysis, the feasibility of machining the separate piece and the correctness of the tool position mathematical model are verified.

/pdf/solution-and-verification-of-cutter-position-for-machining-21syubhwhe.pdf

Solution and Verification of Cutter Position for Machining Split Equal-Base Circle Bevel Gear

The machining methodologies of spiral bevel gears based on universal computer numerical control (CNC) machine tools open up a new way for the flexible and diversified machining of spiral bevel gears. In order to improve the information interrelatedness and traceability in isolated machining mode of spiral bevel gears based on universal CNC machine tools, a novel integrated design and machining mode of spiral bevel gears based on universal CNC machine tools is proposed in this paper, and the spiral bevel gears integrated design and machining scheme is established. On this basis, a communication control framework for spiral bevel gear integrated design and machining is set up, and an information integration management system for spiral bevel gears is developed, which achieve the information communication and integration management of the whole spiral bevel gear integrated design and machining process. Finally, the feasibility and practicability of the integrated design and machining mode and the information integration management system are verified by the integrated design and machining example of one kind of spiral bevel gears. The proposed integrated design and machining mode accomplishes the isolated-to-integrated transformation of spiral bevel gear machining mode based on universal CNC machine tools and meets the modern integrated design and machining demands for spiral bevel gears based on universal CNC machine tools.

An integration method of design and machining for spiral bevel gears based on universal CNC machine tools

The invention discloses a gear milling machine for forming an inner gear ring. The gear milling machine comprises a rotary guide rail part, a stand column part, a milling head part, a milling head support, a disc-shaped workpiece platform, platform struts and workpiece bearings, wherein a central hole is formed in the disc-shaped workpiece platform, the milling head part is built in so that a milling head is not overhung, so that the rigidity of the milling head part is strengthened; and the milling head part is built-in so that the expansion of the processing range of a lathe is only decided by the length of a horizontal guide rail on the workbench, and the limit that the processing specification of the traditional lathe is decided by the size of the rotary workbench can be broken. Due to the movement of the milling head part, the difficult problem that large size worm-gears are needed in the large size rotary workbench can be prevented; and furthermore, the difficult problems that the worm-gears in the rotary workbench are large in impact load, liable to be worn, and unlikely to be precisely located in the large gear machining can be prevented by such ways that a workpiece is fixed and the milling head part rotates along with the stand column part.

Gear milling machine for forming inner gear ring

The invention relates to a boring beveling machine for the end face of a flange, in particular to a flange manufacturing machine capable of automatically feeding and retracting a tool. According to the technical scheme, the machine capable of manufacturing the flange conveniently is characterized by comprising a round rotating table base, clamping arms, a tool installing frame and a tool feeding and retracting transmission mechanism of the tool installing frame. The round rotating table base comprises a fixing disc, a gear rotating disc and an inner gear disc. A transmission device is arranged on the fixing disc or the inner gear disc and works to drive the gear rotating disc to rotate on the fixing disc, an installing support is arranged on the gear rotating disc, and the tool installing frame can be arranged on the installing support in a sliding mode. By the adoption of the technical scheme, the defects in the prior art are overcome, and the novel boring beveling machine for the end face of the flange is capable of achieving convenient machining, feeding and retracting the tool freely and changing the speed of feeding and retracting the tool.

Boring beveling machine for end face of flange

The invention discloses a measuring device for measuring the volume of a sea cave and a measuring method thereof. The measuring device for measuring the volume of the sea cave comprises a base, a vertical rod, a bracket and a laser range finder. The vertical rod is arranged on the base, the bracket is installed on the vertical rod, the bracket is provided with a cross rod, and one end of the crossrod is fixedly connected with a dial. The dial is provided with a clamping seat which is rotatably connected with the dial, the laser range finder is installed on the clamping seat, and a pointer isfixedly arranged on the clamping seat for indicating the rotation angle of the laser range finder. The angle and distance of the laser range finder rotating at different angles in the horizontal direction are measured through the pointer arranged on the clamping seat and the dial, the height of the laser range finder in the vertical direction is fixedly measured through the vertical rod and the bracket, horizontal section shapes of the sea cave at different heights are drawn by drawing software, and the volume is measured, the volume of the sea cave at different heights is calculated through aformula, and the obtained volume is added to obtain the total volume of the sea cave. The measuring device for measuring the volume of the sea cave is simple in structure and convenient and quick tooperate.

Measuring device for measuring volume of sea cave and measuring method thereof

Received 18 March 2015 Abstract The purpose of this paper is to achieve machining equal base circle bevel gears with a pot-shaped gear cutter. Based on the theory, the feasibility is analyzed, the coordinate systems of cutting, on both convex and concave surfaces, are established, and the mutual transformation matrices of these cutting coordinate systems are obtained. With the pot-shaped cutter coordinate system, the unit tangential vector and normal vector of the curved surface are calculated. Then, the tool surface point velocity vector under the fixed coordinate system is worked out through solving the instantaneous angular velocity of the points on the wheel billet and vector of the cutter curved surface. Finally, after establishing and solving of the meshing equations on the conjugate contact point between the cutter curved surface and tooth surface, the target machining expression is presented. The three dimensional tooth surface is modeled by Matlab, solving the contact line family at different locations on the cutter, and then comparison between the resulted tooth surface and the theoretical one is conducted. The tooth cutting experiment verified the feasibility of the proposed machining processes, which may lay a solid foundation for the industrial application of this new method.

The theoretical and experimental research of machining equal base circle bevel gears with a pot-shaped milling cutter

The invention discloses a geological logging instrument with a feature point positioning function. The geological logging instrument comprises a base, an L-shaped rack is fixedly connected to the position above the base, a horizontal index dial is arranged between the horizontal wall of the L-shaped rack and the base, a spirit level is arranged between the horizontal index dial and the L-shaped rack, the inner side wall of the vertical wall of the L-shaped rack is fixedly connected with a camera platform which is used for mounting a digital camera, and the camera platform can adjust the position connected with the digital camera. In addition, the camera platform is further provided with a swinging mechanism which is used for mounting a laser range finder and enables the laser range finder to rotate by 360 degrees in the horizontal direction. The geological logging instrument with the feature point positioning function can widen the application range of the digital camera, and improve the efficiency of field operation.

Geological logging instrument with feature point positioning function

The utility model discloses a forming gear milling machine for inner gear rings. The forming gear milling machine comprises a rotary guide rail assembly, an upright column assembly, a milling head assembly, a milling head support, a disc-shaped workpiece platform, platform struts and workpiece supports. A center hole is formed in the disc-shaped workpiece platform. The forming gear milling machine has the advantages that a milling head is no longer suspended owing to the built-in milling head assembly, so that the rigidity of the milling head assembly can be improved; owing to the built-in milling head assembly, expansion of a machining range of a machine tool is only determined by the lengths of horizontal guide rails on the workpiece platform, and constraints of machining specifications of the traditional machine tool on the dimensions of a rotary workbench are broken through; owing to the mobility of the milling head assembly, the difficult problem that large-specification worm and gear pairs in large-specification rotary workbenches are required to be manufactured is solved; owing to a mode that workpieces are fixed while the milling head assembly rotates along with the upright column assembly, difficult problems of high impact load, easiness in abrasion and difficulty in precision positioning of the worm and gear pairs in the rotary workbenches during large-size gear machining can be solved.

Forming gear milling machine for inner gear rings

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The theoretical and experimental research of machining equal base circle bevel gears with a pot-shaped milling cutter

Gear milling machine for forming inner gear ring

Geological logging instrument with feature point positioning function

Forming gear milling machine for inner gear rings