1253 results about "Small hole" patented technology

The invention provides a leakage point pressure difference response high-strength blocking agent based on iron ion dynamic cross-linked latex and a preparation method thereof, and the raw materials comprise the following components in parts: 60-120 parts of latex, 60-120 parts of deionized water, 5-15 parts of an activator, 5-10 parts of a defoamer, 100 parts of a terminator, 100 parts of a stabilizer, 10 parts of a 20% ferric chloride solution, and the balance of water. Rubber particles are dynamically crosslinked through ferric ions, and the plugging strength is remarkably improved. Compared with a traditional differential pressure plugging agent, the plugging strength for small holes with the diameter of 0.5 mm reaches 35.67 MPa and is improved by about 238%, and the plugging strength for large holes with the diameter of 1 mm reaches 9.68 MPa and is improved by about 428%. And the plugging device is suitable for plugging conditions with higher leakage point pressure difference. In addition, the plugging agent can realize rapid and high-strength plugging of an underground pipe column, and provides a more efficient and more reliable solution for well site construction.

The utility model discloses a leveling mechanism of an airing rack assembly of a clothes airing system. The leveling mechanism comprises the airing rack assembly, two steel wire ropes and two adjustable assemblies. The adjustable assembly comprises a steel wire rope fixing piece and an adjusting bolt. The tail end of the steel wire rope is provided with a plug with the diameter larger than that of a steel wire rope body. The steel wire rope fixing piece is provided with a connecting hole, the connecting hole comprises a large hole part and a small hole part which are transversely communicated, the steel wire rope penetrates through the large hole part and then transversely moves to enter the position where the steel wire rope penetrates through the small hole part, and the plug is blocked by the edge of the small hole part and limited to the lower side of the steel wire rope fixing piece; the adjusting bolt penetrates through the large hole part to be screwed on the airing rack assembly and limits transverse movement of the steel wire rope, and vertical displacement between the adjusting bolt and the steel wire rope fixing piece is limited through the limiting assembly; the tail end of the steel wire rope is limited and fixed with the steel wire rope fixing sheet; by screwing the adjusting bolt, the height of the steel wire rope fixing piece relative to the airing rack assembly is adjusted, and therefore leveling of the airing rack assembly is achieved; the device has the advantages of simple structure, convenience in installation and labor-saving and convenient height adjustment.

The invention relates to the technical field of steel pipe machining, and discloses a continuous punching device for steel pipe machining and a using method thereof.The continuous punching device for steel pipe machining comprises a workbench and further comprises an L-shaped frame which is arranged at the top of the workbench in a sliding mode; the supporting and clamping assembly is arranged at the top of the workbench, and the supporting and clamping assembly is used for supporting and clamping the steel pipe; the drilling assembly is arranged on the transverse edge of the L-shaped frame, and the drilling assembly is used for drilling the steel pipe; and the hole grinding assembly is arranged on the drilling assembly, and the hole grinding assembly is used for removing burrs adhered to the drilled hole in the steel pipe. Before drilling, the drill rod can drill a small hole in the steel pipe to eliminate stress generated during subsequent drilling of the drill cylinder, the situation that the steel pipe cracks during drilling is avoided, burrs on the hole formed in the steel pipe can be ground and removed, drilling and burr cleaning are convenient and fast, and the using effect of the equipment is improved.

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 present invention relates to the technical field of casting of automotive parts, and specifically to a casting sand mold forming device and method for automotive parts. An upper microporous plate and a lower microporous plate are arranged at intervals up and down in the air guiding flow channel. The lower microporous plate is located in the air guiding flow channel, and the upper microporous plate is pressed on the stepped surface communicating between the annular groove and the air guiding flow channel. The upper microporous plate and the lower microporous plate are connected by multiple groups of air pipes. The beneficial effects are as follows: By adding a pouring and ramming component to the existing casting process, multiple groups of sand injection channels can be used to selectively choose the sand injection position, and the sand injection position can be selected according to the characteristics of the model part to ensure complete filling of the small holes and grooves. At the same time, the air guiding flow channel is used to further carry out negative pressure air extraction on the sand mold after extrusion and compaction, reduce the gap between the sand bodies, improve the overall ramming strength, ensure the integrity of the sand mold after overall demolding, avoid collapse, and greatly improve the qualified rate.

The utility model belongs to the technical field of additive manufacturing, and discloses an air outlet mechanism and additive manufacturing equipment. The air outlet mechanism comprises an air inlet assembly and a rectifying part, the air inlet assembly comprises an air inlet channel, one end of the air inlet channel is connected with an air source, and the other end of the air inlet channel is communicated with an air bellow; the rectifying part is arranged in the air inlet channel and is perpendicular to the air inlet direction in the air inlet channel, a first hole set and second hole sets located on the two sides of the first hole set are formed in the rectifying part, the hole diameter of the first hole set is larger than that of the second hole sets, and air entering the air inlet channel from the air source enters the air bellow after passing through the first hole set or the second hole sets. The air speed of the air close to the pipe wall of the air inlet channel is higher, the second hole set with the smaller hole diameter is arranged to rectify the part of the air, the air flowing through the rectifying piece is uniform in overall air speed, and therefore the quality of a printed piece is improved.

The invention provides a ball joint mechanism with a compact structure, which comprises a solid ball body and a shell capable of accommodating the ball body, and a ball handle is arranged at the upper part of the ball body; a stepped through hole is formed in the position, corresponding to the ball handle, of the ball body, the stepped through hole is composed of a small hole section and a large hole section, the small hole section is a threaded hole, the large hole section is an unthreaded hole, an opening of the small hole section faces upwards and is located on the ball handle, and an opening of the large hole section faces downwards and is located on the spherical surface of the ball body; an adjusting screw plug, a spring and a plunger are sequentially installed in the stepped through hole from top to bottom, one part of the adjusting screw plug is in threaded fit with the small hole section, the other part of the adjusting screw plug is located in the large hole section, the outer side end of the plunger can extend outwards from an opening of the large hole section under the elastic force action of the spring, and the end face of the outer side end of the plunger is a spherical surface; a curved surface seat is arranged on the lower portion of the shell, the curved surface seat is provided with an inner concave surface, and the outer side end face of the plunger is in contact fit with the inner concave surface of the curved surface seat. The ball body in the structure can obtain large damping feeling during rotation and is very smooth during rotation.

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 present invention discloses a concentrated water regulating valve, comprising: a valve body, which has a water inlet, a water outlet and a discharge port, and a valve cavity is formed inside the valve body; a partition component, which is arranged in the valve body and divides the valve cavity into a first cavity and a second cavity, and a hole system penetrating the first cavity and the second cavity is opened on the partition component, the water inlet and the water outlet are connected to the first cavity, and the discharge port is connected to the second cavity; a valve core, which is arranged in the second cavity to change the flow cross section of the hole system; wherein: the first cavity is arranged as a columnar cavity; at least the water inlet is extended to the first cavity along the tangential direction so that the concentrated water enters the first cavity through the water inlet and then flows in a rotation. By extending the water inlet to the first cavity along the tangential direction, the hole system is continuously flushed to a large extent, and thus the hole system can be effectively prevented from being blocked due to crystallization, especially the end of the hole system where the hole opening is smaller can be effectively prevented from being blocked.

The utility model discloses a special glass slide for a stimulated Raman scattering imaging microscope, which comprises a glass slide, a cover glass and a buckle, the glass slide is in limit connection with the cover glass through the buckle, a sample groove is arranged on the glass slide, the cover glass covers the sample groove, so that a cavity is formed between the glass slide and the cover glass, and the sample groove is arranged in the cavity. And the side surface of the glass slide is provided with at least two small holes which are directly communicated with the inner cavity of the sample groove. According to the utility model, water evaporation can be prevented, bubbles can be avoided, water can be replenished without uncovering the cover glass, and laser is ensured to be focused on the same plane of a sample during imaging.

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 utility model relates to the technical field of machining, and discloses a small hole cutter structure based on modular design, which solves the problem that the conventional small hole cutter needs to be detached and cleaned, so that the operation is relatively tedious, and comprises a mounting frame, a mounting plate is fixedly mounted at the top of the mounting frame, and a small hole cutter is arranged at the bottom of the mounting frame. A rotating mechanism is arranged on the small hole cutter, a cleaning mechanism is arranged in the mounting frame, the cleaning mechanism comprises two L-shaped round rods symmetrically fixed to the inner bottom wall of the mounting frame, and the outer sides of the two L-shaped round rods are movably sleeved with sliding plates; according to the small-hole tool clamping device, the two sliding blocks can get close to each other conveniently through cooperation between the air cylinder and the lifting plate and cooperation between the stand column and the movable rod, the small-hole tool is clamped through cooperation between the spring and the sliding plate and cooperation between the L-shaped round rod and the transverse plates, and the surface of the small-hole tool can be cleaned conveniently through the bristles when the small-hole tool ascends; therefore, the small-hole cutter does not need to be detached and cleaned.

The utility model discloses a quick plug structure, which comprises a first pipe joint, a second pipe joint and a limit component, the first pipe joint and the second pipe joint are mutually plugged, the limit component is used for axial limit, the limit component comprises a limit groove, a plug hole and a plug pin, and the plug hole penetrates through the inner wall of the first pipe joint; the limiting groove is formed in the outer wall of the second pipe joint, the plug pin is provided with an acting section, the acting section penetrates through the inserting hole, the side portion of the acting section is limited in the limiting groove at the same time, the first pipe joint sequentially comprises a large inner hole section and a small inner hole section from a port of the first pipe joint, and a step is formed at the junction of the large inner hole section and the small inner hole section. The insertion hole is formed in the large inner hole section in a penetrating manner; the second pipe joint sequentially comprises a sealing section and a limiting section from a port of the second pipe joint, the limiting groove is formed in the limiting section, and the sealing section is inserted into the small inner hole section in a sealed mode. According to the utility model, the first pipe joint adopts a large and small hole mode, so that the sealing section is not easy to cut when passing through the insertion hole of the large inner hole section during assembly, and the sealing effect can be ensured.

The utility model discloses a novel hole position degree inspection tool which comprises a bottom plate, a positioning assembly, a fixing assembly and a hole position detection pin assembly. The positioning assembly is used for realizing reference positioning of the to-be-tested piece; the fixing assembly is used for pressing and fixing the to-be-tested piece; the hole position detection pin assembly comprises a large hole detection pin piece and a small hole detection pin piece, and is used for achieving the detection of the position degree of a corresponding hole of a to-be-detected piece. The large hole detection pin member and the small hole detection pin member respectively comprise a positioning sleeve, a detection pin and an elastic member. When the elastic piece is not subjected to external force, the elasticity of the elastic piece can enable the detection end of the corresponding detection pin to be positioned in the positioning sleeve; when the elastic piece is pressed, the elastic piece is compressed, and the detection end of the corresponding detection pin can penetrate through the positioning sleeve to be inserted into the corresponding hole of the standard piece. According to the utility model, the detection pin can be inserted into the corresponding hole of the member to be detected by pressing the detection pin to detect the position degree of the hole, the detection process is convenient, and the detection pin is fixed through the elastic member to prevent the detection pin from being lost.

The present invention discloses a deep small hole machining method combining multi-objective optimization and adaptive control, which includes: designing a two-factor three-level orthogonal experiment table, conducting experiments according to process parameters, and statistically analyzing experimental data; collecting torque signals in real time, studying the characteristics of torque signals, and determining the torque change rate threshold θ during the safe machining process of deep small holes; establishing and verifying a response surface quadratic function model; optimizing the response surface quadratic function model to obtain the best combination of process parameters under constraint conditions; using the best combination of process parameters as the initial data for machining, driving the machine tool to start drilling, and monitoring the torque signal in real time during the machining process to adaptively generate control signals; when the torque change rate is greater than the preset change rate threshold θ, controlling the machine tool to retract the tool, chip removal and cooling, and continuing machining after cooling is completed until machining is completed. The present invention can machine deep small holes with high quality, high efficiency and stability, the machining process is stable and efficient, and the machining result has high precision.

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 invention provides a laser welding method for a metal workpiece with an aluminum coating on the surface, at least two laser beams are symmetrically arranged in the welding advancing direction in the laser welding process, the quality factor M2 of the laser beams is smaller than 1.5, each laser beam irradiates a welding assembly, and the welding assembly is welded with the aluminum coating on the surface of the metal workpiece. More than two deep melting small holes and molten metal surrounding the small holes are formed; under the irradiation of laser beam energy, the welding zone of the assembly is melted to form an overall slender molten pool, and the front edge of the molten pool tends to the vertical advancing direction to form a nearly rectangular morphology front end; the multiple deep penetration small holes drive surrounding liquid metal to flow and enable an aluminum coating on the surface of the weldment assembly to be melted, and distribution of aluminum in a molten pool tends to be uniform. According to the method, multiple laser beams are provided to act on laser welding of butt joint of the steel with the aluminum coating, so that the aluminum element is uniformly distributed in a welding seam, the influence of aluminum on a welding joint is weakened, the method is low in cost and simple to operate, and the laser welding joint with excellent performance can be obtained.

The utility model provides a sealing detection tool for a porous oil pipe, a pipe head at one end of the porous oil pipe is provided with an oil inlet, a pipe body of the porous oil pipe is provided with a plurality of small jet holes, and the sealing detection tool comprises a bottom plate. The bottom plate is provided with a floating lower module used for supporting the porous oil pipe and plugging the small spraying holes and a plugging set used for inflating the oil inlet and plugging the oil inlet during inflation, and an upper module used for pressing the porous oil pipe is fixed to the bottom plate through a support set. The floating lower module comprises a base plate and a plurality of lower pressing blocks, the lower pressing blocks are arranged on the base plate, and the bottom of the base plate is connected to the bottom plate through elastic pieces. According to the utility model, the problem of how to prevent the porous oil pipe from being crushed in the sealing detection process of the porous oil pipe in the prior art is solved.

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 a preparation process of a fine-spacing ordered dense-arrangement porous needle plate. The preparation process comprises the following steps: designing a three-dimensional model of a needle plate mold, reserving hole site marking points, setting laser processing parameters according to the characteristics of selected materials and the precision of the required mold, filling selected metal powder, and manufacturing a needle plate mold blank through a 3D metal printing technology; according to the performance requirements of the selected materials, the needle plate mold blank is subjected to heat treatment; and a machine vision system is used for recognizing reserved hole site mark points and correcting positioning deviation, different laser machining parameters are selected according to the surface quality grade of the mold, fine machining of the inner surface of a micropore is achieved through the laser technology, and the high-quality needle plate mold is obtained. The invention further discloses a porous needle plate mold. By adopting the device and the method, the problems of difficulty in positioning, low machining efficiency, non-uniform hole distribution, overlarge hole pitch, rough hole wall and the like during micropore machining are solved, and efficient preparation of the high-precision needle plate mold with numerous micropores, small hole pitch and ordered arrangement of the micropores is successfully realized.

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 invention relates to the technical field of drilling machines, and discloses a novel micro-hole ultrasonic vibration drilling machine which comprises a workbench and further comprises an adjusting mechanism arranged at the top of the workbench and used for adjusting the position of a workpiece, a clamping mechanism arranged on the adjusting mechanism and used for clamping and fixing the workpiece, and a fixing frame installed at the top of the workbench and used for fixing the workpiece. The hydraulic cylinder is installed on the fixing frame, the main shaft system is arranged at the bottom of the movable end of the hydraulic cylinder, the energy converter is arranged on the main shaft system, the amplitude-change pole is arranged on the energy converter, the tool is arranged on the amplitude-change pole, and the positioning mechanism is arranged on the main shaft system; the guide rails are arranged around the inner wall of the frame. The connecting plate and the moving seat are driven by the linear motor in the adjusting mechanism, the position of the workpiece can be quickly and accurately adjusted, manual frequent adjustment is not needed, the machining efficiency is greatly improved, the machining time is shortened, and the batch machining requirement is met.

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 invention provides a perforated brick production mold, and belongs to the technical field of perforated brick processing. Comprising a U-shaped fixing plate, one end of the U-shaped fixing plate is inserted into the inner wall of the inserting groove, the other end of the U-shaped fixing plate is fixedly connected with a first fixing plate through a screw, a second fixing plate is fixedly connected to the outer portion of one side of the first fixing plate, and a first round hole groove is formed in the outer wall of the top of the first fixing plate; the end, away from the first fixing plate, of the second fixing plate is fixedly connected with a third fixing plate. By arranging the rotating assembly, the knocking column on the inner wall of the large hole column can be knocked during rotation, so that the large hole column drives the small hole column to shake, bubbles in a concrete mixture in the fixed mold are discharged through vibration generated by cooperation of the knocking column and the small hole column, and meanwhile collapse generated by bubble discharging at the top of the mixture is rolled to be flat.

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 utility model relates to a cabinet and a wire arrangement rack thereof. The wire arrangement frame comprises a wire arrangement barrel, an installation part and a plurality of first fastening parts, the wire arrangement barrel is held to enable the heads of the first fastening parts to penetrate through the first holes, then the wire arrangement barrel is moved downwards, and the connectors of the first fastening parts cannot be separated from the second holes, so that the wire arrangement barrel is fixed to the to-be-installed position; the thread part of the first fastener only needs to be moved into the first hole from the second hole, and the connector of the first fastener is separated from the second hole, so that the effect that the wire arrangement barrel is detachably connected to the to-be-mounted position is achieved, and the thread part of the first fastener can be ensured to be located in the second hole with a small hole diameter through gravity; therefore, the detachable installation of the wire arrangement cylinder is realized, the cable is arranged at the same time, a certain gap is formed between the wire arrangement cylinder and the to-be-installed position through the installation part, and it is ensured that a part needing to protrude, such as a connector of a unit fastener, is located in the gap between the wire arrangement cylinder and the to-be-installed position.