10results about How to "Control flatness" patented technology

This utility model discloses a cushion punching device, including a processing table. A placement plate is fixedly installed in the middle of the processing table. Clamping frames are symmetrically slidably installed on the upper surface of the processing table. The two clamping frames can move back to back and towards each other. A rotating shaft is symmetrically rotatably installed in the middle of the clamping frames. A car cushion is placed on the placement plate, and the two ends of the car cushion are clamped between two clamping rollers on the two rotating shafts. Then, the two clamping frames are driven to move in opposite directions to straighten the car cushion and control the vertical flatness of the car cushion. During the movement of the clamping frames, the two clamping rollers on the rotating shaft move in opposite directions on the rotating shaft. Since the car cushion is clamped and fixed between the two clamping rollers, the movement of the clamping rollers will straighten the car cushion, keep the surface of the car cushion smooth, and prevent the car cushion from wrinkling. Then, the laser punching component is controlled to move along the X and Y axes to punch holes in the entire car cushion.

The application provides a lens set, an optical system and an electronic device. The lens set comprises a first lens set, a second lens set and a third lens set, the first lens set comprises a first lens to a fifth lens, the second lens set comprises a sixth lens to a tenth lens, and the third lens set comprises an eleventh lens to a fifteenth lens; 3.31≤f12 / (CT11+CT12)≤5.40; -3.70<f14 / (CT13+CT14)<-2.30; 4.05<FG3 / CT15<8.75; f12 is an effective focal length of the twelfth lens, CT11, CT12, CT13, CT14 and CT15 are central thicknesses of the eleventh lens to the fifteenth lens respectively, f14 is an effective focal length of the fourteenth lens, and FG3 is a combined focal length of the third lens set. The lens set can achieve a comprehensive balance in high image quality, compact structure and environmental adaptability in a full field of view.

This invention provides a pump housing comprising a first housing, a second housing, and an assembly. The second housing is connected to the first housing to form a receiving cavity capable of accommodating an impeller. At least one of the first and second housings has a groove with an opening facing the receiving cavity. The groove has a first side annular surface. The assembly includes a connected mounting surface and a second side annular surface. The assembly is accommodated in the groove, with the mounting surface facing the surface of the impeller housed within the receiving cavity, and the second side annular surface contacting the first side annular surface. The pump housing provided by this invention, by additionally providing the assembly to be installed in at least one of the first and second housings, allows for separate processing of the first housing, the second housing, and the assembly. This enables control over the flatness of the mounting surface, providing a basis for significant improvement in the flatness of the mounting surface and preventing thrombosis while improving the overall operational accuracy of the ventricular assist device. This invention also provides a pump body and a ventricular assist device.

The utility model belongs to the printing die cutting technical field especially relates to a label digital printing die cutting machine, include: shell, the middle position department fixed mounting of shell inside has digital die cutting, the below of digital die cutting and located the rotation mounting of finished product winding wheel and unwinding wheel in the shell, the top of digital die cutting and located the rotation mounting of waste wheel and light membrane wheel on the inner wall of shell, annular groove, the annular groove is set up on the inner wall of shell, the sliding installation of annular groove has the adjusting column, the rotation mounting of the inner wall of shell has the rotating lever, and the adjusting column is located between the both ends of rotating lever, in this technical scheme, through setting up unwinding wheel, adjusting column, finished product winding wheel, a plurality of rotating rollers, fixed column, slicing knife group, printer and material receiving assembly and a plurality of adjusting assembly, ensure that the whole device has the printing, laminating, die cutting, slitting and slicing integration operation of printing material, realize the degree of highly automatic processing, be convenient for staff to use.

The utility model discloses a liquid cooling assembly which comprises a liquid cooling plate body used for cooling a battery module, and the liquid cooling plate body is fixed in a battery box body through a plurality of self-plugging rivets; the liquid cooling plate body is fixedly mounted in the battery box body through the self-plugging rivets so as to cool the battery module in the battery box body, and the liquid cooling plate is mounted through the self-plugging rivets, so that the deformation degree of the liquid cooling plate caused by mounting is reduced, and the flatness of the liquid cooling plate is controlled.

The utility model discloses a cutting device for power cable processing, which comprises a working table, a first chute is arranged at the top of the working table in a penetrating manner, a driving assembly is arranged at the bottom of the working table, a first screw rod is arranged at the bottom of the working table through the driving assembly, and the surface of the first screw rod is rotatably connected with a fixing plate. The fixing plate is fixedly connected with the workbench, the surface of the first screw rod is in threaded connection with a first moving plate, a clamping assembly is arranged at the top of the first moving plate, an adjusting assembly is arranged at the top of the workbench, a moving frame is arranged at the top of the workbench through the adjusting assembly, and a lifting assembly is arranged at the top of the moving frame. A second moving plate is arranged in the moving frame through a lifting assembly, and a cutting assembly is arranged on the second moving plate. And the cable is cut after being tightened, so that the cable can be kept in a linear state, and the length measurement error caused by bending or loosening of the cable in the cutting process is avoided.

This invention discloses a multi-directional rough milling process for an automotive reducer housing and the housing itself, belonging to the field of automotive technology. The process includes: artificially aging the housing; selecting at least two areas on the edge of a preset area of ​​the main positioning datum surface of the housing to create auxiliary positioning holes; grinding an auxiliary positioning datum surface on the housing; placing the housing on a support substrate using the auxiliary positioning datum surface and auxiliary positioning holes as positioning references; using a clamping mechanism to simultaneously clamp the housing at multiple points, avoiding thin-walled areas of the housing; using a machining equipment with an A-axis rotary table, milling the main positioning datum surface in the preset area of ​​the main positioning datum surface using the auxiliary positioning datum surface as a reference, and then milling the side surface of the housing using the main positioning datum surface as a reference; after the flatness of the main positioning datum surface meets the requirements, performing low-temperature stress release treatment. This application establishes a complete process flow from pretreatment, positioning and clamping, multi-directional rough milling, dynamic control to detection and stress release.

The invention provides an anti-blocking hole protection and smooth blasting collaborative operation system for peripheral holes of a large-section tunnel, and belongs to the technical field of tunnel construction. The method comprises the following steps: S1, determining peripheral hole arrangement parameters based on tunnel geological survey data; s2, a combined type anti-blocking hole protecting device is adopted for conducting drilling protection on peripheral holes, the anti-blocking hole protecting device is synchronously installed in the drilling process, and after drilling is completed, residual rock powder in the holes is removed through cooperation of high-pressure airflow and a rock powder collecting assembly; s3, adjusting light explosion parameters according to the rock firmness coefficient; s4, adopting a partition collaborative detonation mode, and adopting millisecond millisecond detonation for the peripheral holes and the main detonation holes; and S5, flatness detection is conducted on the tunnel slope after blasting. According to the method, integrated cooperation of anti-blocking hole protection, smooth blasting parameter optimization, detonation control and parameter closed-loop adjustment is achieved, the peripheral hole drilling quality, the smooth blasting effect and the construction efficiency are improved, the construction cost is reduced, and tunnel construction safety and structural stability are guaranteed.

The application relates to a flat material clamp, a flat material assembly and a guiding device for edge covering, wherein the flat material clamp is used for being assembled to a sewing device and guiding sewing material, the flat material clamp has opposite front and back directions and corresponding two lateral directions, the flat material clamp defines a sewing material channel for the sewing material to pass through in the front and back directions, and the flat material clamp comprises a top part located above the sewing material channel and used for smoothing the sewing material, a detection window is arranged on the top part, and the detection window is used for coupling a detection signal with the sewing material; a bottom part connected to the top part, the bottom part is located below the sewing material channel and provides a supporting surface for the sewing material, and at least one lateral direction of the sewing material channel is provided with a connecting part in an open mode, the connecting part is connected with the top part and / or the bottom part, and the flat material clamp is assembled to the sewing device through the connecting part. The flat material clamp in the application can pre-treat the sewing material, improves production stability, and the sewing material in a stable state can provide a basis for automatic detection and control and expand design space.