The invention relates to a method for processing a herringbone gear by half opening of an end mill. The method specifically comprises the following steps of (S1) obtaining a herringbone surface and anengagement surface formed by the transverse tooth profile according to the required tooth profile of the herringbone gear, and determining the tooth profile of the end mill for processing the herringbone gear; (S2) rotating the end mill around the self axis so as to do a cutting motion on a tooth groove; (S3) moving the end mill in the direction which is parallel to the axis of the to-be-processed herringbone gear, rotating the to-be-processed herringbone gear around the self axis first, and then rotating the to-be-processed herringbone gear in the reverse direction of the self axis at the same angular speed so as to form a herringbone tooth groove, so that one-time tooth groove cutting is completed; (S4) stopping moving the end mill in the direction which is parallel to the axis of the to-be-processed herringbone gear, and rotating and indexing the to-be-processed herringbone gear around the self axis; and (S5) repeating the steps S2 to S4, wherein the rotation starting direction ofthe to-be-processed herringbone gear around the self axis in each circulation is opposite to the rotation ending direction in the previous circulation. The method has the advantages of high machiningefficiency and precision and no clearance groove theoretically.

Method for processing herringbone gear by half opening of end mill

The invention discloses a vibration damping performance testing device, which comprises a bracket; wherein the bracket is provided with an excitation system; the excitation system is connected with atemperature control box system through a lifting system. The excitation system comprises a stepping motor a; an output shaft of the stepping motor a is connected with one end of a shaft through a coupler; the shaft is horizontally arranged; the middle part of the shaft is connected with a cam key; the cam surface is circumferentially provided with a sliding groove; the sliding groove is provided with a pulley; a central shaft of the pulley is connected with the bottom end of a connecting rod through a bearing, and the top end of the connecting rod is connected with the lifting system. The setting mode of the shaft is characterized in that a bearing bracket vertically fixed on the bracket is included; both ends of the shaft are connected with the bearing bracket through a bearing a. The vibration damping performance testing device of the invention can determine the optimal working temperature of a metal rubber vibration damper, improve the vibration damping performance of the metal rubber vibration damper and prolong the service life of the vibration damper.

Vibration damping performance testing device

The invention makes available a method for the production of gear wheels, with which it is possible to produce gear wheels having double-helical teeth, in particularly efficient manner. For this purpose, in the case of the method according to the invention for chipping production of a gear wheel, which is provided with double-helical teeth, in which the teeth of the one gear half are configured to run counter to the teeth of the other gear half, in rising manner, wherein the gear halves are arranged offset from one another by an angle amount with reference to the axis of rotation of the gear wheel, a gear wheel blank is made available, on which the teeth provided on the gear wheel are produced by means of hobbing, using a hobbing wheel, which, during hobbing machining of the teeth, in each instance, of one of the gear halves, reaches all the way into the adjacent tooth gaps of the other gear half, in each instance.

Method for machining a tooth wheel provided with a double slanting cog

The invention relates to the field of war industry assembling, in particular to a real-time ammunition assembling instruction method based on a visualized assembling system. According to the method, correct working procedures, a three-dimensional part model and portion data information are read; visualized assembling videos are played, and parts and data information of corresponding portions are displayed; an operator extracts the assembly parts to carry out code scanning recognition; a visualized assembling technology integration software system judges whether the assembly parts are correct or not; if the assembly parts are correct, the assembling videos are displayed, the corresponding visualized assembling videos are played in a circulating manner, or else, the visualized assembling videos are locked; and after assembling is completed, assembling verification is carried out. According to the method, manual assembling is instructed synchronously in a visualized manner in real time, time for searching for manuals of personnel and the memory capacitance of the personnel to the related technology are reduced, by means of a CAPP system, data of small videos for assembling, BOM menusand the like are cut in advance, the calculation amount and the calculation time for cutting the videos temporarily in a database are saved, thus time is saved, fault assembling is reduced, and the assembling efficiency and correctness are improved.

Real-time ammunition assembling instruction method based on visualized assembling system

The invention discloses a zero-degree rack expansion processing method of a narrow hollow fluted herringbone gear, and belongs to the field of herringbone gear processing. The method comprises the steps: (1) determining a gear tooth profile enveloping scheme of a gear to be processed; (2) determining a gear rotation angle of a tangent point of a working tooth surface; (3) determining the positionof a working tooth surface processing cutter; (4) determining a tooth root transition curved surface cutter profile; (5) determining the position of a tooth root processing cutter; (6) planning a tooth surface machining tool path; and (7) determining a gear dividing processing scheme. The method has the following advantages and effects that a common end mill is adopted, and the narrow hollow fluted herringbone gear is finely machined through a four-shaft linkage machine tool single-side expansion method, so that the machining efficiency and precision are greatly improved; the two-section machining method of the tooth surface and the tooth root transition curved surface is adopted, so that the strength and the service life of the cutter are improved, and the complexity and the manufacturingdifficulty of the cutter are reduced.

Zero-degree rack expansion processing method of narrow hollow fluted herringbone gear

The invention discloses a grinding method for a clearance-groove-free double-helical gear. After gear shaping machining, the middle portion of the clearance-groove-free double-helical gear is subjected to plating layer anti-carburizing heat treatment protection, after heat treatment, a protective plating layer is removed through a chemical method, and then, grinding is conducted through a saucer-shaped grinding wheel. Due to the fact that the middle portion of the double-helical gear is not subjected to carburization strengthening, the gear face of the middle portion of the double-helical gearcan be cut off through a common milling method, and thus, the middle portion does not take part in engagement but has the effects of being connected with the gear faces on the two sides and improvingstrength. Through the grinding method, grinding of the clearance-groove-free double-helical gear is achieved, and the strength of the clearance-groove-free double-helical gear is improved compared with a clearance groove type double-helical gear.

Grinding method for clearance-groove-free double-helical gear

The invention discloses a machining method of an ultra-narrow clearance groove double helix gear suitable for a high-speed and heavy-duty machine. Firstly, turning is carried out on the middle part ofthe double helix gear to machine a clearance groove; secondly, gear teeth on the two sides of the double helix gear are machined through insertion tooth rough machining; and thirdly, surface heat treatment carburization strengthening treatment is carried out on the gear teeth. The machining method is suitable for a butterfly grinding wheel for gear tooth precision grinding machining, and as for the wheel teeth on the part close to the clearance groove, a finger-like grinding wheel is adopted for conducting precision grinding machining. Compared with a traditional double helix gear, the ultra-narrow clearance groove double helix gear is provided with the narrower clearance groove, the bearing capacity is higher, the effective meshing contact line is longer, and the structure is more compact. The machining method is particularly suitable for high-speed and heavy-duty working conditions required by ship and aviation transmission systems.

Machining method of ultra-narrow clearance groove double helix gear suitable for high-speed and heavy-duty machine

The invention relates to a vibration test bench suitable for transmitter assembly quality control. The vibration test bench includes a test bench upper base, a lower base, a support assembly, a cam transmission mechanism assembly, a motor assembly, an impact assembly and a transmitter assembly. The upper base is designed with a plurality of through holes for mounting the transmitter assembly and the impact assembly. The lower base is designed with a plurality of through holes for mounting the support assembly and the cam transmission mechanism assembly. The support assembly is designed for inner and outer sleeves for supporting the upper and lower bases, and springs are arranged in the sleeves for cushioning. The cam transmission mechanism assembly is designed with a cylindrical tooth surface multi-tooth cam, which transmits the power torque through a gear to drive the cylindrical tooth surface multi-tooth cam to contact the bottom surface of the upper base to generate continuous vibration. The motor assembly acts as a power output source. The vibration test bench of the invention solves the problem of transmitting failure due to design and assembly of a transmitter, and can test the assembly stress, vibration and impact of components. The vibration test bench of the invention has the characteristics of simple structure, convenient operation and low cost.

Vibration test bench suitable for transmitter assembly quality control

The invention relates to a method for designing a digital assembly visualization platform of a casing to solve the problem of low assembly efficiency caused by misloading and neglected loading of a casing product in the assembly process. The invention aims at the assembly quality and reliability requirements of the casing product, plans and designs a digital assembly visualization platform function of the casing product from the perspective of digital assembly, and forms a design scheme for the digital assembly visualization platform of the casing product. In the invention, a method for usingthe digital assembly visualization platform of the casing product is established, the assembly efficiency of the casing product can be effectively improved, the assembly cycle is shortened, the problem of misloading and neglected loading in the assembly process is improved, and assembly workers are provided with good instruction and training.

Liu Peng

Papers

Grinding method for clearance-groove-free double-helical gear

Machining method of ultra-narrow clearance groove double helix gear suitable for high-speed and heavy-duty machine

Vibration test bench suitable for transmitter assembly quality control

Method for designing digital assembly visualization platform of casing