11 results about "Tooth abrasion" patented technology

The invention discloses a production method and application of toothpaste-grade calcium pyrophosphate, the production method comprises the following steps: mixing calcium hydrophosphate with a magnesium source, heating to 750-830 DEG C at a rate of 4-6 DEG C / min, calcining for 2-4 hours, then carrying out three-gradient cooling on the calcined product, and finally crushing to obtain the toothpaste-grade calcium pyrophosphate, wherein the three-gradient cooling comprises the steps of heating and slowly cooling to 500 DEG C at the speed of 10-15 DEG C / min, then naturally cooling to 100-150 DEG C, and finally cooling to below 50 DEG C at the speed of 3-5 DEG C / min. The prepared toothpaste-grade calcium pyrophosphate is high in beta-phase conversion rate, small in tooth abrasion value, uniform in particle size distribution, excellent in performance when applied to toothpaste grinding materials and wide in application prospect.

The utility model discloses a clamping device for converter sublance APC, which comprises two clamping parts which are oppositely arranged, and a clamping cavity for clamping a probe is formed between the two clamping parts; each clamping part comprises a clamping plate, a connecting plate and a rotating shaft, each clamping plate is arc-shaped, threaded teeth are arranged on the inner wall of each clamping plate in the length direction, the two clamping plates of the two clamping parts are close to each other, a clamping cavity for clamping a probe is formed between the two clamping plates, and the threaded teeth of the two clamping plates of the two clamping parts can be spliced into a complete spiral shape. At least one threaded hole is formed in the clamping plate, one end of the set screw penetrates through the threaded hole to abut against the surface of the probe, the lower portion of the clamping plate is connected with the connecting plate, and the rotating shaft is arranged below the connecting plate. And thread tooth abrasion is avoided.

The utility model belongs to the technical field of transmission shafts, and particularly relates to a non-welding spherical tooth transmission shaft which comprises an inter-shaft connecting pipe, a first spherical tooth coupler and a second spherical tooth coupler are symmetrically connected to the two ends of the inter-shaft connecting pipe, each of the first spherical tooth coupler and the second spherical tooth coupler comprises a spherical tooth seat, and spherical tooth shafts are connected to the spherical tooth seats in a meshed mode. The self-aligning ball gear is characterized in that one end, close to the ball gear seat, of the ball gear shaft is fixedly connected with a self-aligning assembly, and an arc-shaped surface is arranged at the position, corresponding to the self-aligning assembly, of the ball gear seat. The faults of transmission efficiency reduction, abnormal sound and the like caused by center offset of the outer spherical tooth part after the inner and outer spherical teeth are worn are avoided, the service life of the product is prolonged, and the use effect is improved.

The invention provides a tooth abrasion cutting navigation method and system and a storage medium. The tooth abrasion cutting navigation method comprises the steps that a coordinate conversion relation between any two of a CT three-dimensional coordinate system, a reference plate three-dimensional coordinate system and an optical three-dimensional coordinate system is obtained through registration; calibrating the tooth extraction mobile phone; constructing and optimizing an oral anatomical structure segmentation learning model; segmenting the oral CT real-time three-dimensional data; selecting a to-be-processed affected tooth three-dimensional model in the tooth CT three-dimensional model; acquiring a real-time relative position between the diseased tooth and the tooth extraction mobile phone; and updating the affected tooth three-dimensional model in real time according to the running path of the tip of the machine needle, and eliminating three-dimensional voxels, coinciding with the running path of the tip of the machine needle, on the affected tooth three-dimensional model. The oral cavity anatomical structure segmentation learning model can provide assistance for oral cavity CT real-time three-dimensional data analysis, and real-time poses of the mobile phone tracker and the oral reference plate are collected based on the binocular navigator, so that visual tooth abrasion cutting is realized.

The utility model discloses a buckle connecting device based on bracketless invisible corrector. The device includes bracketless invisible corrector, connecting groove body and connecting head, and the front part of bracketless invisible corrector is provided with connecting groove body, and bracketless invisible corrector and connecting groove body are integrally made, and connecting head is connected with bracketless invisible corrector by cooperation with connecting groove body, and connecting groove body and connecting head are all provided with arc part that is in accord with the front side of bracketless invisible corrector, and the arc part between connecting groove body and connecting head is connected through ball head structure. The device can conveniently and stably install components to upper dentition or lower dentition, and can extend to outside of oral cavity through connecting head, and does not need glue and tooth abrasion, and is a non-invasive, convenient and painless connecting device.

The invention belongs to the technical field of bucket tooth abrasion testing, and particularly relates to an excavator bucket tooth abrasion testing device and method. Comprising a bucket; a U-shaped handrail; the bucket is connected with a plurality of bucket teeth; the U-shaped holding rod is arranged at the top of the excavator bucket, and the excavator bucket is located in the opening range of the U-shaped holding rod; a retention self-clamping unit is arranged on the U-shaped handrail; the retention self-clamping unit comprises a retention T plate; the two retention T plates are mounted at the two ends of the U-shaped handrail respectively; two first bases are connected to the side face of the U-shaped handrail. The opposite faces of the two first bases are jointly connected with a main sliding rail. The main slide rail is provided with a decontamination and loss measurement device; by means of the technical scheme, attachments such as soil blocks attached to the bucket teeth can be actively and synchronously cleaned during testing, the influence on the testing result of the bucket teeth is avoided, the testing precision is improved, the labor intensity of workers is reduced, the attachments do not need to be manually cleaned, the using effect of the device is improved, and therefore the overall testing efficiency is improved.

The utility model provides an excavator bucket tooth wear testing machine, which comprises a base and a charging barrel positioned above the base, the top of the base is provided with a first fixed rod and a second fixed rod which are positioned on the two sides of the charging barrel, and the outer sides of the first fixed rod and the second fixed rod are respectively and movably sleeved with a first movable frame and a second movable frame; the outer sides, extending out of the top ends of the first moving frame and the second moving frame, of the first fixing rod and the second fixing rod are jointly and fixedly sleeved with a first fixing plate. According to the excavator bucket tooth abrasion testing machine, the bucket tooth can be limited through the fixing pin after being arranged on the clamping block in a sleeving mode, and the bucket tooth can be pressed and fixed to the outer side of the clamping block through the fixing pin while the pull rod can be driven to move by tightening the nut; at the moment, the fixed column is loosened, so that the bucket tooth can be adjusted at any angle around the sphere center of the ball head rod while the limiting block can be released from limiting the ball head rod, and by adopting the structure, the installation and the angle adjustment of the bucket tooth are relatively convenient.

The utility model provides an anti-molar tooth socket which comprises a first limiting part for limiting incisor teeth and second limiting parts which are respectively connected to two ends of the first limiting part and are used for preventing molar teeth in a posterior molar region, the first limiting part comprises a fixing block, a first clamping groove located in the upper side of the fixing block and used for being connected with upper incisor teeth, and a second clamping groove located in the lower side of the fixing block and used for being connected with lower incisor teeth. According to the molar prevention tooth socket, the rear molar area is connected to the second limiting part, the upper incisor is connected into the first clamping groove, and the lower incisor is connected into the second clamping groove, so that when teeth are ground at night, the upper incisor is limited by the first clamping groove, and the lower incisor is limited by the second clamping groove; therefore, the movement amplitude of the posterior molar region when the second limiting part is rubbed can be reduced, and the tooth socket has a better anti-molar effect on the teeth.

The invention discloses a reliability analysis method for an intelligent harmonic reducer of a robot body, and aims to solve the problems that the reliability analysis of an existing harmonic reducer neglects the load uncertainty, does not consider the influence of intelligent sensor installation and is low in model and actual fitting degree. The method comprises the following steps: establishing component models of a flexible gear, a rigid gear, a wave generator and an intelligent film sensor; model simplification is carried out on tooth meshing of the flexible gear and the rigid gear, cementing of the flexible gear and the sensor and contact of the flexible gear and the wave generator. Sampling in a range of [0, 30] N / m by adopting DOE optimal Latin hypercube design to obtain a variable load sample; inputting the variable load to the dynamic model for simulation; and evaluating the reliability based on transmission precision, tooth abrasion loss, strain and back clearance indexes. According to the method, the accuracy and practicability of reliability analysis of the intelligent harmonic reducer are improved, and the method is suitable for full-life-cycle state sensing requirements of a robot in an intelligent scene.

Provided are an occlusal splint (2) and a method for preparing same. The occlusal splint (2) comprises n single-bag units, wherein each single-bag unit comprises a bag cavity, a bag housing, and a filling material contained in the bag cavity, n is an integer of ≥2, the n single-bag units are connected to each other, and the n single-bag units are not in communication with each other. Alternatively, the occlusal splint (2) comprises a bag (3), wherein the bag (3) comprises a bag housing, a bag cavity, and a filling material contained in the bag cavity, and the occlusal splint (2) is in contact with an appliance (1) and does not cover the incisor area. In the first aspect, the occlusal splint (2) can achieve dynamic adjustment of occlusion and adapt to the tooth morphology of a patient, thereby making the occlusal shaping more accurate and comfortable and reducing tooth abrasion. The bag cavity of each single-bag unit can be filled with different filling materials, such that the occlusal force can be better balanced and distributed, and the bag cavity can also be used as a multifunctional carrier. In the second aspect, the occlusal splint (2) can effectively improve the occlusal stability, and is made of a softer material.

The invention belongs to the technical field of cutting pick wear monitoring, and aims to solve the problems that the wear state of a cutting pick is difficult to detect and the periodic maintenance cost is increased. The invention provides an on-line monitoring method, system, equipment and medium for wear of a cutting pick of a cantilever type heading machine. The method comprises the following steps: acquiring a pressure signal of a cutting oil cylinder, a vibration signal of a cutting speed reducer and a temperature signal of a cutting head in real time; performing feature extraction on the sensor data, and determining a feature weight value based on correlation among the sensors; analyzing the abrasion condition of the cutting tooth based on the extracted features and the correlation among the sensors, and obtaining an initial cutting tooth abrasion state; correcting the features based on a double-layer feature extraction model, and updating to obtain a corrected cutting pick wear state; and monitoring the wear condition of the cutting pick based on the corrected wear state of the cutting pick. According to the cutting pick on-line monitoring technology based on multi-index information fusion, the abrasion condition of the cutting pick can be mastered in real time, and intelligent diagnosis based on the state and maintenance based on the condition are carried out on the cutting pick.