878 results about "Small hole" patented technology

The invention discloses a solid waste recycling forming machining die, and relates to the technical field of bicycle production waste reutilization, the solid waste recycling forming machining die comprises a lower die mechanism, an upper die mechanism is arranged on the lower die mechanism, a pressing mechanism is arranged on the upper die mechanism, and a male die set is arranged in the middle of the bottom wall of an upper die base; the material pressing mechanism comprises a first spring and a material pressing plate which are arranged on the upper die base, and further comprises an elastic ejector block set arranged on the material pressing plate and a guide hole site set formed in the material pressing plate in an up-down penetrating mode. The die has the advantages that the same die carries out stepped continuous punching operation, punching stress can be reduced, and the probability of deformation of the disc brake during punching is reduced; residual stress existing in the punched disc brake disc can be redistributed through attaching and pressure maintaining, and the situation that due to the fact that large holes and small holes in the disc brake disc are evenly and densely distributed in position, local deformation is generated is prevented; and the elastic ejector block group applies uniform elastic pressing force to the disc brake disc, so that the probability of deformation of the disc brake disc during rigid demolding is reduced.

The invention discloses a linkage device, an integrated main control unit and an ABS brake system.The linkage device comprises a valve body, a piston assembly and a one-way sealing element, the valve body comprises a first cavity, a second cavity and a second oil way, and the first cavity is communicated with the second oil way and the second cavity; the piston assembly slides in the first cavity in a reciprocating mode along the axis, part of the piston assembly can enter the second oil way, a gap is formed between the piston assembly and the valve body, a plurality of small holes are evenly formed in the side wall of the piston assembly, the piston assembly is provided with an elastic element, and the one-way sealing piece is arranged in the annular groove of the valve body and located on the outer side wall of the piston assembly. The one-way sealing piece is in sliding connection with the piston assembly, and the one-way sealing piece and the small holes jointly serve as a structure for controlling opening and closing of the internal liquid channel. The linkage device solves the problems that in the prior art, a one-way oil seal of a linkage device is prone to failure, the pressure relief hole diameter is too small, and then the efficiency and safety of a braking system are affected.

The invention provides a drilling processing method for a ceramic substrate. The drilling processing method for the ceramic substrate comprises the following steps: forming a large hole in the ceramic substrate by adopting laser drilling, wherein the aperture of the large hole is 0.25-5mm or is 0.5 times greater than the thickness of the ceramic substrate; filling the macropores with a composite material containing a ceramic filler and thermosetting resin, and forming a supporting layer through a curing process; and the supporting layer is mechanically drilled to form small holes, and the hole diameter of the small holes is smaller than that of the large holes. According to the ceramic substrate drilling machining method, through stepped drilling of laser taper hole guiding, composite material filling and mechanical precision drilling, the problem that small holes of a thin substrate are prone to cracking during machining is solved, the yield is increased, the risk of breakage of a hard drill bit for mechanical drilling can be reduced, machining time is shortened, and the production cost is reduced; the drilling processing method is compatible with various ceramic substrates, and can solve the problem of multi-material integration of electronic packaging.

The application provides a novel high-temperature-resistant small-hole tilting-pad bearing which is mainly composed of a bearing shell and a metal wire mesh structure, adopts a tilting-pad structure with S spring flexibility, is provided with micro grooves on each pad, and is provided with small holes on the micro grooves as working surfaces for supplying gas to form a gas film. The left and right two parts of the bearing shell are integrally machined by using electric spark technology and are connected and fixed by using cylindrical pins. Since the throttler, the flow channel and the shell are integrally machined, the bearing has the characteristics of high-temperature resistance. The metal wire mesh structure is embedded in the gap between the bearing body and the pad, the metal wire mesh structure provides flexible support for the pad, and can keep the performance stable at high and low temperatures. Therefore, the bearing structure provided by the application can provide higher damping characteristics for the bearing and has the characteristics of high-temperature resistance.

The utility model discloses a pinhole device for oil supply during deep hole processing, which comprises a cutter bar, a guide device, a support device and a pinhole protection connecting device are arranged on the cutter bar, the guide device comprises a combined bearing inner ring, and a conical disc is fixedly connected on the outer wall of the combined bearing inner ring through a bolt. The small hole protection connecting device integrally adopts a slender shaft structure to reduce the influence of oil pressure, the guide device and the supporting device are reduced in the same proportion on the original basis and are matched with the small hole connection protection device, the original functions are played at the same time, the contact area between cutting oil and a small hole device cavity is reduced, and the machining efficiency is improved. Therefore, oil pressure formed by cutting oil in the cavity is reduced, a gap, caused by too large oil pressure, of the contact face of the cutter bar and the workpiece is avoided, it is guaranteed that the cutter bar and the workpiece are tightly attached, the workpiece is prevented from falling off through positioning and clamping of the conical disc and the workpiece, deflection of the cutter bar during machining is avoided, and a high-precision guide track is established.

The invention discloses a device and a method for detecting small hole parts in the technical field of part detection. The small hole type part detection device comprises a marble damping platform, a double-coordinate displacement platform, a to-be-detected part fixing assembly, a visual detection mechanism and a contact type measurement mechanism. The double-coordinate displacement platform can move on the marble damping platform in the X-Y direction. The to-be-detected part fixing assembly is arranged on the double-coordinate displacement platform and used for obliquely fixing a to-be-detected hole part, the visual detection mechanism is installed on the marble damping platform and used for visually detecting the to-be-detected hole part, and the contact type measuring mechanism is installed on the marble damping platform and used for measuring the to-be-detected hole part. And measuring the contour data of the in-hole chamfer of the to-be-measured hole part and the perpendicularity of the to-be-measured hole part. The roundness and the coaxiality are measured through non-contact measurement. The device can solve the problem that a contact type measuring device cannot be used for measuring the chamfer due to the fact that the hole size of a hole part is long and narrow, and meets the requirement for integrated detection of all positions of the part.

The utility model relates to a left front lower swing arm welding assembly testing fixture which comprises a testing fixture bottom plate, a left support, a middle hole position detection device and a right support are sequentially arranged at the upper end of the testing fixture bottom plate from left to right in a staggered mode, and positioning protrusions are arranged at the upper end of the left support and the upper end of the right support. A side hole detection device is arranged in front of the left support at the upper end of the detection tool bottom plate, an inclined triangular hole position plate is arranged behind the left support, three detection hole positions which are arranged in a triangular shape are arranged at the upper end of the triangular hole position plate, and a first detection pin is inserted into each detection hole position; the upper end of the detection tool bottom plate is provided with a pressing device at the outer side of the left support, the outer side of the middle hole site detection device and the outer side of the right support, and the upper end of the detection tool bottom plate is provided with a turnover detection device at the rear of the middle hole site detection device. According to the utility model, hole sites such as a large mounting hole, a small mounting hole, an upper hole, an inner hole of a butt joint sleeve, the upper hole and the like are detected, each hole site is ensured to meet requirements, and the qualified rate of products leaving a factory is greatly improved.

The invention discloses an energy-saving self-locking check valve, and relates to the technical field of check valves, the energy-saving self-locking check valve comprises a valve body, a valve cover, a valve seat and a valve clack, and further comprises a metal cover fixed at the lower part of the valve clack, and a first small hole is formed in the surface of the metal cover; the leather cup is located between the metal cover and the valve clack, a lower cavity is formed by the leather cup and the metal cover, and an upper cavity is formed by the leather cup and the valve clack; the steel ball is arranged in the transverse through hole; the sleeve is fixed to the valve deck, multiple stages of ball sockets are arranged on the inner wall, when fluid flows forwards, the leather cup is driven to jack up the ejector pin rod to expand the steel balls to be embedded into the multiple stages of ball sockets, the opening degree of the valve clack is locked, and invalid energy consumption of the fluid continuously overcoming the dead weight of the valve clack is eliminated; and when the fluid stops, the elastic reset of the leather cup and the return pressure introduced by the back pressure hole of the valve clack act together to drive the ejector pin rod to move downwards to release the locking of the steel ball, so that the valve clack is quickly closed and the reverse flow is cut off. According to the design, opening degree self-adaptive locking and dual-power valve closing are achieved through a pure mechanical structure, the operation energy consumption is remarkably reduced, and the sealing reliability is improved.

The application relates to the technical field of pyrophyllite processing, in particular to a crusher for pyrophyllite processing, which comprises a whole support support, the inner wall of the whole support support is provided with a crushing cylinder main body, and the crushing cylinder main body is arranged in an inclined mode. The crusher for pyrophyllite processing is characterized in that a hydraulic device brings a ring-shaped pressing plate to move downward to press the crushing plate group, the adjacent crushing plates in the crushing plate group can compress the return springs in the corresponding two crushing plates, the distance between the two adjacent crushing plates is reduced, and the pyrophyllite between the two crushing plates is crushed, the crushed pyrophyllite gradually falls through the first through hole, the second through hole, the third through hole and the fourth through hole with smaller and smaller hole sizes, the pyrophyllite pieces containing other impurities which are larger than the hardness of the pyrophyllite cannot be completely crushed due to the large hardness, therefore, the pyrophyllite pieces containing impurities are left in the corresponding spaces of the crushing plate group according to the volume, and the crushed pyrophyllite is discharged through the discharge port.

The present application relates to a kind of high temperature high pressure formation fluid containing large hole fracture plugging simulation device, including nitrogen bottle, liquid storage tank, simulation wellbore, heating insulation cover, back pressure valve and hole fracture isolation plate, there is inner cylinder in upper kettle body, there is simulation leakage layer in inner cylinder, upper kettle body and lower kettle body are connected by flange, hole fracture isolation plate is set between upper kettle body and lower kettle body, back pressure valve is set at the place close to hole fracture isolation plate of lower kettle body, heating insulation cover is set on the outer wall of upper kettle body and lower kettle body.The simulation method for high temperature high pressure formation fluid containing large hole fracture plugging using the above device, including: plugging slurry is discharged or passed through formation fluid and then enters simulation leakage layer;The plugging effect of conventional drilling fluid on small hole fracture leakage layer is judged by the pressure difference of upper kettle body and lower kettle body;The breakthrough pressure of sealing zone is obtained by the pressure difference between upper kettle body and lower kettle body after sealing zone is formed by solidified cementation type plugging slurry.The present application is in line with actual downhole, easy and fast to operate, provides platform and means for the plugging research of formation fluid containing large hole fracture leakage layer.

The invention discloses a feeding mechanism of an automatic cold header for machining piston pins. The feeding mechanism comprises a main machine (1), a feeding mechanism body (20) is arranged on the front portion of the main machine (1), the feeding mechanism is connected with an iron wire frame (2) through an iron wire, and a discharging mechanism (3) is arranged on one side of the main machine (1). The feeding mechanism body comprises a base (4), fixed wheels (5) are arranged on one side of the base (4), and moving wheels (6) are arranged on the other side of the base (4). Side bases (7) are arranged on two sides of the base (4), sliding bases (8) are arranged on the inner sides of the side bases (7), and the contact surfaces of the sliding bases (8) and the side bases (7) are in sliding fit. The moving wheels (6) are arranged on the upper sides of the sliding bases (8), a threaded barrel (9) is fixed below the sliding bases (8), a threaded column (10) is arranged in the threaded barrel (9), a bearing pedestal (11) is arranged at one end of the threaded column (10), a rotating ring (12) is fixed to the other end of the threaded column (10), the rotating ring (12) is provided with a circle of small holes (13), and a rotating handle (14) is arranged in one small hole (13) in an embedded mode.

The invention relates to a high-quality and high-efficiency laser drilling method. Aiming at the problems of low processing efficiency, poor hole making quality, unstable processing technology and the like in small hole laser processing of difficult-to-process materials, the method specifically comprises the following steps of: 1, performing high-feed rotary spiral hole making, and removing a large amount of materials to form through holes; namely, a proper rotating laser beam (rotating radius r1) is selected to form a laser ring, and spiral drilling is performed in a high-feed manner, so that a large amount of materials can be removed, and through holes can be formed. The second step is low-feed rotary finish machining, a small amount of materials are removed to form a through hole, the rotating radius r2 of a rotating laser beam is adjusted, the hole is subjected to finish machining at the low z-axis feeding speed, the high-quality through hole is obtained, and if the quality of the through hole or the hole repairing part is not qualified, the parameters are further adjusted. According to the method, the advantages of high femtosecond laser machining precision and small thermal damage are combined, efficient machining of the small holes is achieved, and a solution is provided for high-quality and efficient machining of the small holes.

The invention provides a high-quality machining method for a small hole with a large depth-diameter ratio and nearly zero taper. Comprising the following steps: firstly, processing a conical bottom hole by using a femtosecond laser rotary cutting processing method, calculating the conicity of the bottom hole, selecting a proper light knife, calculating laser flux distribution on a flux line in a hole radius direction, determining a forming process of an ablation curve when an inclined laser beam irradiates an inclined hole wall of the bottom hole, and establishing an ablation curve prediction model; according to the hole diameter and the hole depth, proper machining parameters are selected, and the small hole with the large depth-diameter ratio and nearly zero taper is machined. In order to solve the problem that the taper is difficult to eliminate in the machining process of the large-depth-diameter-ratio small hole of the difficult-to-machine material, based on the femtosecond laser rotary cutting machining technology, the taper area material of the taper hole is eliminated by regulating and controlling the inclined light beam, the nearly-zero-taper formed hole is machined, the hole wall quality after femtosecond laser cold machining is high, and the machining precision is high. Theoretical and technical supports are provided for high-quality machining of large-depth-diameter-ratio nearly-zero-taper small holes of materials difficult to machine.

The invention discloses an alignment method for a resonant cavity of a beam-expanding telescope, and relates to the technical field of beam-expanding telescopes. The method comprises the following steps: when no beam expander exists, enlarging the plane mirror to maximize the power of the through hole diaphragm and make the through hole diaphragm vertical to a light beam; and adjusting the third reflector to the CCD to form circular interference to obtain a reference light path. After the beam expander is arranged, the first reflector and the second reflector are finely adjusted to enable the light beam to penetrate through the small hole again, the CCD reproduces the circular ring, and incidence-telescope axis alignment is completed; the first cavity mirror and the second cavity mirror are sequentially added, pitching / yawing fine adjustment is conducted, and circular ring interference is kept, namely resonant cavity alignment is achieved. The difficulty of parallel alignment between the input light beam and the optical axis of the telescope and the difficulty of alignment between the endoscope and the telescope can be effectively reduced.

The invention provides a method for improving titanium alloy picosecond laser drilling quality, which belongs to the technical field of laser processing, and comprises the following steps: S1, pretreating a titanium alloy material to be processed and tested, and fixing the titanium alloy material on a workbench; s2, a machining position is positioned, and laser parameters and paths required by machining are set; and S3, a common scanning number value is set, and machining is started. And S4, observing the small hole opening condition, if the small hole is opened, reducing the scanning times, and if the small hole is not opened, otherwise. And repeatedly processing and adjusting. And S5, a new titanium alloy material is replaced, the formal machining position is positioned, and laser parameters and the number of scanning times for just getting through are set. By means of the method, the proper scanning frequency is determined, energy absorbed by the material can just meet the punching requirement, excessive accumulation of the energy is avoided, and therefore splash is reduced, and the thickness of an accumulation layer is reduced.

The application discloses a solid droplet-based drag reduction ball preparation and testing method, and relates to the underwater drag reduction technical field.The preparation method comprises the following steps: performing decontamination treatment on the surface of a steel ball, configuring a PDMS solution and pouring the PDMS solution into a polytetrafluoroethylene mold with small holes with different curvature radii, performing vacuum degassing and solidification, and then peeling off to obtain solid droplet structures with different curvature radii, and bonding the solid droplet structures to the bottom of the steel ball.Through the regulation and control of the solid droplet curvature radius (2.5-10.8 mm) and the water entry speed, the high-speed camera technology is used to observe the change law of the sputtering crown formation, air entrainment and air cavity closure mode in the water entry process, the quantitative analysis of the underwater air cavity volume and the drag coefficient is combined, and the influence of the solid droplet curvature radius on the air cavity shape and the drag reduction performance is verified.The solid droplet structure optimizes the air film capture efficiency, significantly reduces the blunt body pressure difference resistance and the friction resistance, and the preparation process is simple, stable and suitable for the development of the underwater vehicle drag reduction technology.

The application provides an anti-blocking device for a liquid propulsion system and an assembling method, comprising a conical top, a first connecting ring, a second connecting ring, a third connecting ring and connecting columns; the first connecting ring, the second connecting ring and the third connecting ring are sequentially arranged and connected through the connecting columns; the first connecting ring is connected with the conical top on the side away from the second connecting ring; the conical top, the first connecting ring, the second connecting ring, the third connecting ring and the connecting columns are all provided with a hollow structure around. The application can filter out large and sheet metal excesses in advance, prevent the large and sheet metal excesses from blocking the filter and other small holes arranged downstream of the pipeline, solve the problem of blocking the flow channel due to the accidental falling of the large and sheet metal excesses in the upstream pipeline in a small-diameter pipeline space system, and greatly reduce the system failure risk.

The utility model relates to bolt forging technical field discloses a kind of forging devices for T bolt production, including base, bracket is fixedly installed on base outer side, bracket top is fixedly installed with top cover;Several groups of uniform arrays of grooves are opened in base, and conical body is fixedly installed in groove inner bottom;Impact block is placed in bracket inner side top, and impact block has three groups, and impact block top both sides are fixedly installed with support rod.The utility model is provided with impact block, multiple groups of grooves and electromagnet, multiple groups of T bolts can be inserted and positioned in groove, after being placed, electromagnet can be closed, iron block cancels limit, support rod and impact block quickly move down, and T bolt is impacted, cooperate with the conical body of lower side, the processing of T bolt bottom end fixed small hole can be realized, compared with existing mode, not only save labor, and more efficient.

The utility model discloses an energy-saving aluminum alloy door and window convenient to clean and insulate, which comprises an aluminum alloy outer frame and an aluminum alloy inner frame, the cross section of the aluminum alloy outer frame is L-shaped, double-layer toughened glass is fixed inside the aluminum alloy inner frame, a fixing block is fixed at the top of the side edge of the aluminum alloy inner frame, and the fixing block is fixed at the top of the side edge of the aluminum alloy inner frame. The fixing block is slidably sleeved with a first bolt, the first bolt is connected with the aluminum alloy outer frame through threads, a connecting block is hinged to the bottom of the side edge of the aluminum alloy inner frame, the connecting block is rotatably sleeved with a second bolt, a limiting block is fixed to one end of the second bolt, and a stepped hole is formed in the side edge of the aluminum alloy outer frame. A large hole of the stepped hole is an unthreaded hole, and a small hole of the stepped hole is a threaded hole. The aluminum alloy inner frame can be turned over, so that the outer side face of the double-layer tempered glass can be conveniently cleaned, the double-layer tempered glass does not need to climb to the outside, safety is good, and the aluminum alloy inner frame is rotated to be vertical after cleaning is completed.

The application relates to a steel truss bridge thick plate residual stress detection and repair integrated construction device, and belongs to the technical field of weld detection, which comprises a frame body, a drilling device, a strain gauge and a strain acquisition and analysis instrument are arranged on the frame body, a bearing disc is arranged on the frame body, the bearing disc slides along the vertical direction relative to the frame body, meanwhile, the bearing disc is also rotationally connected with the frame body, and the bearing disc rotates relative to the frame body; a polishing disc and a filler box are further arranged on the frame body, the polishing disc, the filler box and the drilling device are all located below the bearing disc, the polishing disc is rotationally connected with the bearing disc and rotates relative to the bearing disc; the filler box and the drilling device are fixedly connected with the bearing disc, the filler box is filled with metal filler, and a feeding pipe group for conveying the metal filler from the filler box to the outside is connected to the filler box, the application has the effect of timely plugging the residual small holes after the residual stress of the steel is detected, and the effect of repairing the steel is achieved.

The utility model provides a sealing valve for a large-diameter geothermal well. The sealing valve comprises a top pressure plate, a middle pressure plate, an elastic sealing ring and a bottom pressure plate which are coaxially arranged from top to bottom, the top pressure disc is a concave elastic metal disc, and a plurality of radial notches are uniformly formed in a disc body of the top pressure disc; the middle pressure plate and the bottom pressure plate are planar metal discs; the elastic sealing ring is a planar high-temperature-resistant rubber sealing ring; the middle positions of the top pressure plate, the middle pressure plate, the elastic sealing ring and the bottom pressure plate are respectively provided with a central hole for the heat-conducting medium pipe to pass through; a plurality of studs are symmetrically and fixedly arranged on a plate body of the bottom pressure plate, and each stud sequentially penetrates through a small hole in the elastic sealing ring, a small hole in the middle pressure plate and a strip-shaped hole in the top pressure plate and then is in threaded connection with a nut; through nut spinning, the top pressure plate is pressed and deformed to clamp the well wall of the geothermal well, and meanwhile, the middle pressure plate and the bottom pressure plate extrude the elastic seal. The closing valve can isolate the low-temperature part in the large-diameter geothermal well, and the influence of the low-temperature part of the geothermal well on heat collection is reduced.

The application belongs to the field of flame detector structure design, and particularly relates to a variable-diameter probe structure of an aviation high-temperature-resistant ion flame detector. The structure comprises a cooling air inlet pipe (1) which comprises a large-diameter section (11), a small-diameter section (12) and a variable-diameter section (13) between the large-diameter section (11) and the small-diameter section (12), wherein the variable-diameter section (13) is provided with cooling air inlet holes (14); a probe head (2) is arranged at the end of the small-diameter section (12) of the cooling air inlet pipe (1), the probe head (2) is a hollow cone structure, the apex of the cone is provided with a spherical surface, and a plurality of small holes (21) are arranged on the probe head (2). The application improves the cooling effect of the cooling air flow on the probe of the ion flame detector, reduces the ablation influence of the hot air flow on the probe of the ion flame detector, and further improves the high-temperature resistance of the ion flame detector.

The utility model discloses a rear formula flower basket wall connecting piece belongs to wall connecting piece technical field, including fastener, flower basket cover, middle hexagonal double -end screw rod and expansion pipe, the fastener includes fastener body, be equipped with connecting screw rod on the fastener body, connecting screw rod is connected with one end screw of flower basket cover, the other end of flower basket cover is connected with one end screw of middle hexagonal double -end screw rod, the other end of middle hexagonal double -end screw rod is connected with expansion pipe. The utility model installs convenient, need not reserve hole and hole when wall body masonry, can directly in the existing wall body or concrete structure and set up small hole and fix, save the time of work, simplify the complex operation process of traditional frame pipe and embrace the beam or the constructional column, effectively promote construction efficiency, reliable connection, through the stable connection of expansion pipe extrusion fixation realization scaffold and structure, strengthen operation security, strong applicability is applicable to different height wall body and various structure types, has extensive engineering application value.

The present invention discloses an electric valve, including a nut component including a nut, a rotor component including a rotor and a screw rod, the nut and the screw rod being threadedly connected, the valve core component including a valve sleeve and a valve core, the valve sleeve is roughly cylindrical, the valve sleeve is movably connected to the screw rod, the screw rod can drive the valve sleeve to move axially, the valve sleeve is fixedly connected to the valve core, the valve core can abut or separate from the sealing part of the valve seat component, the valve sleeve includes a sliding fitting part, the sliding fitting part includes a first sliding part and a second sliding part, the outer diameter of the first sliding part is smaller than the outer diameter of the second sliding part, the nut includes a guide hole section, the guide hole section includes a small hole section and a large hole section, the inner hole of the small hole section is roughly circular, the inner hole of the large hole section is roughly circular, the inner diameter of the small hole section is smaller than the inner diameter of the large hole section, the reliability of the electric valve closing is improved, and the present application also provides an assembly method of the electric valve.

The utility model relates to the technical field of plastic particle screening, in particular to a screening mechanism of a plastic granulator, which comprises a bottom plate and a screening box, an inclined socket is clamped on one side of the screening box, a small-hole screen plate, a medium-hole screen plate and a large-hole screen plate are respectively clamped on one side of the inclined socket, and two side plates are fixedly connected with one end of the screening box. According to the plastic particle blanking device, the baffle is moved to the position between the small-hole sieve plate and the middle-hole sieve plate, then plastic particles are intercepted by the blocking plate and roll downwards, the blanking speed of the plastic particles is reduced, the time of the plastic particles staying on the small-hole sieve plate is prolonged, and the plastic particles are prevented from falling off from the middle-hole sieve plate. According to the plastic particle screening mechanism, plastic particles can be better screened through the small-hole screening plate, then the plastic particles can be continuously turned over through the two transverse plates on the driven rotating rod, it is ensured that the plastic particles flow and are fully and comprehensively screened, it is avoided that the plastic particles are accumulated at one position all the time, screening work is accelerated, and the production efficiency of the screening mechanism is improved.

The application discloses a damping type wave-preventing device. The damping type wave-preventing device comprises a wave-preventing support installed in an oil tank, the wave-preventing support comprises horizontal plates, vertical horizontal plates and vertical longitudinal plates which are staggered with each other, a plurality of small holes and large holes are formed in the horizontal plates, the vertical horizontal plates and the vertical longitudinal plates, the small holes are used for breaking oil, a damping piece is slidably connected in the large hole, and a bushing is arranged between the damping piece and the large hole. The application solves the problem of poor noise reduction effect in the prior art.

The invention relates to the field of stone machining, in particular to stone machining equipment and a stone machining method. Stone machining equipment comprises two side plates, the two side plates are arranged front and back, the number of the long wheels is multiple, and the front end and the rear end of each long wheel are rotationally connected to the two side plates correspondingly. The stone machining method comprises the steps that S1, plate-shaped stone is placed on the upper sides of the multiple long wheels; s2, the two T-shaped frames slide, and the multiple short wheels on the front side and the multiple short wheels on the rear side abut against the front side and the rear side of the plate-shaped stone correspondingly; s3, the plate-shaped stone is slid left and right, and the position needing to be punched is placed below the annular frame; s4, a pressing ring and a rubber ring are pressed on the punching position of the plate-shaped stone; s5, the multiple grinding cylinders are adjusted to be in an expanded or contracted state, the multiple grinding cylinders are driven to rotate to tangential the stone, and a plurality of small holes are cut in the stone; and S6, the multiple grinding cylinders are driven to rotate with the axis of the annular frame as the axis, and multiple small holes are cut in the stone again.

The application discloses an engine connecting rod small head elliptical horn hole detection device and method, which comprises a supporting plate and a detection assembly; the detection assembly comprises a small hole detection head, the bottom of the small hole detection head is installed at the upper end of a first lifting assembly; a profile gauge needle in an L shape with a profile gauge is installed in the inner cavity of the small hole detection head, one end of the profile gauge needle is installed at the upper end of the first lifting assembly, and the other end penetrates through the small hole detection head and elastically abuts against the inner wall of the elliptical horn hole of the connecting rod to be detected; four air channels are arranged in the small hole detection head, one end of the air channels extends to the bottom of the small hole detection head; one end of the two air channels opposite in the radial direction is connected with the air outlet pipe of the gas-electricity meter through a tee joint, and the other end extends to the side surface of the small hole detection head respectively. The application has the advantages that the long and short axis sizes of the elliptical hole and the accurate measurement of the horn hole profile line can be simultaneously detected through one-time clamping, and the detection precision and the detection efficiency are greatly improved.

The utility model discloses a stamping die for punching a coaxial small hole opposite to a large hole of a square tube, which relates to the technical field of stamping dies, comprises an upper die set and a lower die set, and is characterized in that the upper die set comprises a die handle, a retaining seat is connected to the die handle through a bolt, and a male die is mounted in the retaining seat; the lower die set comprises a base, a female die is arranged on the base, the female die can be inserted into a large hole of the square tube and achieve positioning for machining of a small hole, and the height of the female die is equal to the sum of the distance and the wall thickness of the two inner walls of the square tube. The female die is provided with an insertion cavity along the axis direction, the insertion cavity can accommodate the diameter of the male die, and the depth of the male die inserted into the insertion cavity is greater than the wall thickness of the square tube. The female die is arranged on the base, so that the structure of the existing punching die is simplified, and more importantly, the female die can play a positioning role in processing a small hole; and the concentricity of the large hole and the small hole is ensured.

The invention discloses a method for simply and rapidly installing a dynode of an electron multiplier, and belongs to the field of electron multiplier assembly. According to the method, extra tools are not needed, and only three long screws and a pair of pointed tweezers need to be additionally used. According to the method, the problem that time and labor are wasted when the ceramic plate of the multiplier and nine dynodes are folded and aligned is solved, and the installation of the dynodes can be effectively accelerated. During installation, the three long screws are inserted into the through holes of the ceramic plate bottom plate, then the screws are sleeved with the limiting stainless steel cylinders respectively, then the nine dynodes and the collecting plate are sequentially installed on the ceramic plate bottom plate, then the ceramic plate top plate is sleeved with the three screws, the hexagonal studs are screwed, and the ceramic plate top plate is installed on the ceramic plate bottom plate. And the distance between the top and bottom ceramic plates is about 4mm longer than that of the limiting stainless steel cylinder. The nine dynodes and the collecting plate are sequentially stirred through pointed tweezers, the upper feet of the dynodes and the collecting plate enter the small mounting holes corresponding to the top plate of the ceramic plate, the lower feet of the dynodes do not leave the small mounting holes corresponding to the bottom ceramic plate, and the top ceramic plate and the bottom ceramic plate are tightened after completion. And the long screws are replaced by the original screws of the multiplier in sequence, and the dynode is assembled.