5results about How to "Reduced Tolerance Requirements" patented technology

The utility model relates to a car guide rail technical field especially is a low friction iron sliding block device for car guide rail, including guide rail piece, sliding block piece, friction assembly, extruding piece and gyro wheel subassembly, in the utility model, through setting compression spring, elastic block, first gyro wheel, second gyro wheel and elastic sleeve, the device can make iron sliding block keep stable in the up and down direction relative guide rail piece through the elastic force of compression spring and elastic block, can make iron sliding block keep stable in the left and right direction relative guide rail piece through the elastic force of elastic sleeve, can reduce the friction between sliding block piece and guide rail piece through first gyro wheel and second gyro wheel, that is to say, can weaken the abrasion in the operation process of sliding block piece and guide rail piece, the requirement of the tolerance of sliding block piece and guide rail piece in the manufacturing process is reduced, makes the production cost of sliding block piece and guide rail piece greatly drop, and the device wears slowly, and the operation fluency change of sliding block piece and guide rail piece is smaller, and the service life is longer.

A method for correcting deformation in large irregular castings includes the following steps: S1, scanning the workpiece with a scanner to obtain its three-dimensional data; S2, comparing the workpiece's three-dimensional data with the design data model to identify the theoretical deformation location; S3, longitudinally slicing the theoretical deformation location, setting the slice with the largest deformation as the reference slice, and creating a conformal template at the reference slice; S4, placing the conformal template at the reference slice location of the workpiece and comparing it with the workpiece, and calculating the actual deformation value; S5, correcting the workpiece using a thermal straightening method based on the actual deformation value; S6, comparing the conformal template with the corrected workpiece. If the actual deformation value after correction is less than the standard tolerance value, proceed to step S7; otherwise, repeat steps S5-S6. S7, scanning the corrected workpiece with a scanner to obtain its three-dimensional data after correction, and comparing it with the design data model. If the deformation is less than the standard tolerance value, the correction is complete; otherwise, repeat steps S2-S6 until the workpiece's deformation is less than the set tolerance value. This solves the problem of not being able to accurately locate and correct the deformation position of irregular workpieces, thus avoiding the scrapping of workpieces caused by this.

A mouth-closing device, comprising a mouth-closing patch (2), the mouth-closing patch (2) being fixed to a user's lips to maintain the user's mouth in a closed state; and further comprising one or more strip-shaped patches (7), the strip-shaped patch (7) being connected to the mouth-closing patch (2) and fixed to the user's face. A fixing device (1) is used for fixing an intraoral apparatus, the fixing device comprising the mouth-closing device, and further comprising a connecting mechanism, wherein the connecting mechanism is located between the mouth-closing patch (2) and the intraoral apparatus, and the mouth-closing patch (2) is connected to the intraoral apparatus by means of the connecting mechanism; the connecting mechanism comprises a connecting piece (3) and one or more fixing rings (4) connected to the connecting piece (3); and the connecting piece (3) is connected to the intraoral apparatus, the mouth-closing patch (2) passes through the fixing ring (4), and the mouth-closing patch (2) is fixed to the user's lips.

The invention relates to a novel double-probe detection module, which can quickly measure height data of a product, and can shorten the detection time while ensuring that a measurement result is stable and reliable. According to the invention, two common modules are combined into one module, and the distance between the left probe and the right probe is closer, so that the switching time is greatly shortened when the probes are switched for detection, and the production efficiency is improved. Different from hard contact blocking of a traditional probe, the sliding block is subjected to secondary speed reduction through the oil pressure buffer and the plunger buffer, structural vibration is effectively and rapidly eliminated, and therefore the detection time is shortened, the detection precision is improved, and meanwhile the problem of structural deformation caused by hard contact impact is solved. The left slide block and the right slide block use two groups of guide rails, so that the slide blocks are more stable, and the stability of a measurement result is ensured. The air cylinder and the sliding block are connected through the universal joint, so that the sliding block moves more smoothly, inclusiveness is higher, the tolerance requirement for a machined part is lowered, and meanwhile the assembling difficulty is lowered.