1338 results about "Blind hole" patented technology

The invention provides an automobile balance block die-casting mould, which comprises a push cylinder, an upper mould base, an upper mould, a lower mould and a lower mould base, wherein the upper mould is arranged on the lower end of the upper mould base; the lower mould is arranged on the upper end of the lower mould base; the upper mould base is connected to the upper end of the lower mould base through a guide pillar; cooling holes are formed in the upper end face and the lower end face of the upper mould base in a penetrating way; a guide sleeve is connected onto each cooling hole. According to the automobile balance block die-casting mould, each cooling channel is communicated with a blind hole, each blind hole is communicated with a cooling hole, and each guide sleeve is arranged on the corresponding cooling hole, so that the mould can be cooled conveniently and quickly through injecting cooling water in the guide sleeves; the cooling channels are arranged at equal distances and in parallel, so that cooling is uniform, the cooling effect can be further improved, and the product quality is improved; the automobile balance block die-casting mould is simple in structure, convenient to operate, and good in cooling effect.

The invention relates to a pre-compensation flexible assembling and adjusting mechanism of a large-diameter transmission reflector. The pre-compensation flexible assembling and adjusting mechanism comprises the large-diameter transmission reflector, a glue joint mandrel, an isolation telecentric flexible hinge, an isolation plate, a hooke flexible hinge, an adjusting flexible branch chain, an anti-rotation flexible branch chain, a back plate and a driving assembly. The large-aperture transmission reflector is provided with three blind holes for glue joint, and is connected with the isolation plate through three groups of glue joint mandrels and isolation telecentric flexible hinges, so that isolation of load deformation interference of the isolation plate is realized; the driving ends of the two adjusting flexible branch chains are correspondingly connected with two driving assemblies installed on the back plate, and the connecting ends of the adjusting flexible branch chains are connected with the isolation plate. One ends of the Hooke flexible hinges and the anti-rotation flexible branch chains are connected with the isolation plate, and the other ends are connected with the back plate; the device has the advantages of being simple in structural form, stable in movement and high in precision, meanwhile, the return clearance caused by axial load reversing under heavy loads can be avoided, the additional surface shape caused by assembling and adjusting stress is effectively isolated, and the additional surface shape caused by gravity is compensated.

The invention relates to the technical field of hemispherical harmonic oscillator assembly, in particular to a welding method and device for an assembled hemispherical harmonic oscillator, and the device comprises a vibration welding platform and a clamping assembly located above the vibration welding platform; the vibration welding platform is used for bearing the sensitive base and providing a thermal field and a vibration field needed by welding, and the clamping assembly is used for clamping the center shaft and sending the center shaft into a center hole of the base. A heating unit and a composite vibration ultrasonic transducer are arranged in the platform, and the platform is configured to apply high-frequency vibration formed by superposition of vertical longitudinal waves and horizontal torsional waves to the base. The high-frequency vibration thixotropic effect is used for reducing the viscosity of the molten solder, the ultrasonic cavitation effect is used for forcibly discharging bubbles at the bottom of the blind hole, and the sound radiation pressure generated by the vibration standing wave field is used for driving the center shaft to achieve friction-free self-centering in the hole. According to the device, the problems of air bolt pseudo soldering and rigid assembly clamping stagnation in the traditional process are solved, and the assembly coaxiality and the connection strength of the harmonic oscillator are remarkably improved.

The invention provides a glass substrate, a preparation method thereof and a chip packaging structure. The glass substrate comprises a glass substrate, at least one first hole section and at least one second hole section are arranged in the glass substrate, and the first hole section is communicated with the second hole section; the glass substrate has a first surface and a second surface which are oppositely arranged, an opening of the first hole section is located in the first surface, and an opening of the second hole section is located in the second surface; the glass substrate is made of glass; the first seed layer is located in the first hole section, a first blind hole is defined by the first seed layer, and an opening of the first blind hole faces the side where the first surface is located; the first conductive part is located in the first blind hole; and the second conductive part is positioned in the second hole section.

The invention discloses a 3D packaging structure and a manufacturing method thereof, and the method employs a glass wafer as a first carrier plate, and solves the problems of reliability and signal interference caused by the mismatching of thermal expansion coefficients of an organic material adapter plate and a Si-based silicon bridge chip. In S1, a blind hole is etched by taking a glass wafer as a base material, and Cu is metallized and filled, and the thermal expansion coefficient of glass is similar to that of a silicon bridge, so that the risk of thermal stress deformation is reduced. And S2, through groove etching, temporary carrier plate bonding and thinning, a through groove hole is formed, and the rigid structure of the glass carrier plate maintains the stability of the packaging structure during high-density integration. And S3, the silicon bridge Die is embedded into the through groove hole, the low thermal expansion characteristic of the glass is well matched with the silicon bridge, the interface stress is reduced, the dielectric property of the glass support plate is excellent, the signal dielectric loss is reduced, and the signal integrity is improved by matching with the silicon bridge Die. And S4, after the functional chip is mounted on the adapter plate, the glass-based adapter plate ensures reliable connection, signal attenuation distortion is inhibited, and a reliable packaging scheme is provided for high-density integration.

The invention provides a package carrier and a preparation method thereof, and the package carrier comprises a first substrate which comprises a first through hole, a first conductive column and a seed layer, the first conductive column and the seed layer are located in the first through hole, and the seed layer is located between the first conductive column and the hole wall of the first through hole; the second substrate is arranged on one side of the first substrate and is in contact with the first substrate, the second substrate comprises a second through hole and a second conductive column filled in the second through hole, and the second conductive column is in contact with the hole wall of the second through hole; wherein the first through hole and the second through hole are at least partially communicated, and the first conductive column and the second conductive column are electrically connected at the contact interface. According to the invention, the first substrate and the second substrate are stacked and contacted, and high-difficulty manufacturing of the through hole is decomposed into respective filling of the low-aspect-ratio through hole and the blind hole, so that the manufacturing difficulty of the high-aspect-ratio through hole is reduced, and the filling effect is improved.

The invention relates to a radio frequency coaxial connector with an automatic compensation structure. The radio frequency coaxial connector is used for direct insertion-screwing tool-free field installation of a smooth copper-clad aluminum pipe radio frequency cable. The connector shell is composed of a rear threaded shell body, a middle threaded shell body and a front threaded shell body, a blind hole is formed in the rear portion of the inner conductor, and the core wire can float in the hole to avoid crushing. According to the radio frequency coaxial connector with the automatic compensation structure, the rear portion of the inner conductor is supported by means of the two insulation supports of the insulation assembly, and in the process that the cable core wire is inserted into the insertion hole of the inner conductor, the cable core wire is inserted into the insertion hole of the inner conductor. Impedance can be automatically compensated, so that impedance matching of a product is guaranteed, and the voltage standing-wave ratio is reduced; and the insulation support of the product is not an inverted cone type tightening structure in the prior art, but clamps the cable core wire in a sliding manner, so that the stress of the connector insulator adopting the structure is relatively small, and the situation that the inner conductor cannot tighten the cable due to deformation is avoided.

The utility model discloses an ultrasonic flowmeter module which comprises a module body and a cover plate, the module body is in a cuboid shape, the left end and the right end of the module body are respectively provided with two transducer installation areas, the middle of the module body is provided with a control module circuit board installation area, and the cover plate is arranged on the upper surface of the module body. Each transducer mounting area comprises a cylindrical barrel, a closed blind hole is formed in the bottom of the barrel, the upper part of the barrel is closed through a cover plate, a through hole I is formed in the position, corresponding to the transducer, of the cover plate, a plurality of screw holes I are formed in the periphery of the barrel, and the control module circuit board mounting area comprises a cuboid frame body; a cavity is arranged between the frame body and the cover plate, the cavity is communicated with the barrel bodies on the two sides respectively to form an inverted-concave-shaped communicated cavity, the two ends of the control module circuit board extend into the barrel bodies respectively, a second through hole is formed in the upper surface of the cover plate at the corresponding position of the frame body, and a cylindrical terminal groove is formed in an opening of the second through hole. The terminal grooves protrude out of the surface of the cover plate. According to the utility model, the energy converter is prevented from being directly contacted with gas or liquid in the pipe section through the design of the blind hole, and the waterproof performance of the module is improved.

The invention relates to a cable laying traction structure and a mounting method, the structure comprises a traction inner sleeve, a traction outer sleeve and a compression nut, the traction outer sleeve comprises an outer sleeve, one end of the outer sleeve is provided with a mounting hole, the traction inner sleeve comprises an inner sleeve coaxially arranged with the outer sleeve, and the inner sleeve is provided with a mounting hole. One end of the inner sleeve is detachably fixed in the mounting hole, a blind hole is formed in the other end of the inner sleeve, a circular-truncated-cone-shaped pressing part is arranged on the outer side of the opening end of the blind hole, the pressing nut comprises a hexagonal section and a sealing section matched with the mounting hole, the hexagonal section and the sealing section are coaxial, and the sealing section is installed in the mounting hole in a threaded mode. A pressing hole matched with the pressing part is formed in the sealing section, a cable via hole communicated with the pressing hole is formed in the hexagonal section, a cable core of the cable penetrates through the cable via hole and is inserted into the blind hole, the outer side of the cable core is sleeved with a protective sleeve, and the protective sleeve is pressed between the pressing hole and the pressing part in a sealed mode. Compared with the prior art, the sealing structure has the advantages of good sealing effect, high reliability and the like.

The invention discloses a large-size carbon fiber composite material wallboard precise hole making process method, and relates to the field of aviation composite material wallboard hole making, and the method comprises the steps that a chip containing space extending in the axial direction is machined in a preset hole position of a composite material wallboard forming mold, and the chip containing space is of a blind hole structure; the chip containing space is filled with a sacrificial layer material matched with thermal expansion, and the difference value between the thermal expansion coefficient of the sacrificial layer material and the forming mold and the composite material is smaller than a preset threshold value; the composite material wallboard is kept in a non-demolding state after being cured, and the wallboard and the forming mold are integrally positioned to machining equipment; establishing a processing coordinate system based on the reference features of the forming die; and a multi-cutting-edge tool is adopted for drilling the wall plate with the mold, so that the tool penetrates through the composite laminated plate and cuts the sacrificial layer material, and the tail end of the tool does not make contact with a forming mold body. According to the scheme, the precision of the connecting hole site of the composite material wallboard can be ensured, and the demolding deformation error, the outlet layering damage and the secondary clamping cost are synchronously eliminated.

The present invention provides an optoelectronic interconnection packaging structure and a preparation method therefor. The method comprises: using a laser method, forming a first blind hole and a second blind hole, the bases of the first blind hole and the second blind hole being in a glass substrate, then performing thinning processing on a first surface of the glass substrate and a second surface of the glass substrate, to form a first through hole and a second through hole, respectively, that are arranged in an offset manner. On the basis of the laser method and the thinning processing, the present application can prepare a high-performance TGV adapter plate on a glass substrate that has a relatively small pitch and a relatively small CD size, is thin and suitable for high-density arrangement, and can effectively prevent metal posts from overlapping. In addition, an optical waveguide layer is disposed between the glass substrate and a rewiring layer, and the TGV adapter plate is used to connect an electrical chip and an optical chip, which can make metal wiring more flexible, achieve photoelectric interconnection integration, reduce package size, lower power consumption, and improve reliability. The application is thus applicable to high-density integrated packaging, and can achieve good optoelectronic signal transmission.

The invention belongs to the technical field of high-power electronic component base materials, and discloses an embedded high-thermal-conductivity ceramic packaging substrate for a high-power scene and a preparation method of the embedded high-thermal-conductivity ceramic packaging substrate. ABF composite layers are arranged above and below a ceramic core plate in the ceramic packaging substrate; a high-thermal-conductivity base material is fixed in the ceramic substrate; interconnection holes are formed in the ceramic substrate, and electroplating copper film layers are arranged on the upper surface and the lower surface of the ceramic substrate and in the interconnection holes; a copper-clad plate layer is arranged on the outer side of the ABF layer, a copper-clad plate groove is formed in the copper-clad plate layer, a blind hole is formed in the copper-clad plate groove, and a copper column is arranged in the blind hole; a solder mask layer is arranged on the surface of the ABF layer on the outermost side, a surface treatment layer is arranged on the outer side of the solder mask layer, and blind holes with built-in copper columns are formed in the surface treatment layer. The preparation method comprises the following steps: forming a substrate groove in the surface of the ceramic substrate; embedding a high-thermal-conductivity base material; arranging an electroplating copper film coating layer; an ABF composite layer is arranged; arranging a solder mask layer; and arranging a surface treatment layer. The LED lamp is good in heat dissipation effect.

The invention belongs to the technical field of electroplating, and particularly relates to a technological method for rapidly filling a blind hole. The process method comprises the following steps: arranging a dry film on the surface of the printed circuit board with the blind hole; exposing and developing the dry film by using a film to show a blind hole; and electroplating the blind hole by using a chemical electroplating solution, wherein the recession degree of the blind hole after electroplating is less than 10 [mu] m. The method only aims at blind hole filling, plate surface copper plating and thinning procedures are omitted, material and energy consumption is reduced, pollution is reduced, production efficiency and PCB yield are improved, and the method is suitable for the advanced packaging fields of PCBs, packaging substrates and the like.

The invention discloses an underwater connector. The technical problem that the radial size of an underwater connector with an oil injection hole is large is solved. The underwater connector comprises a first shell, a second shell, a socket assembly contained in the first shell, a plug assembly contained in the second shell, an oil injection valve body, a flexible insulation sleeve and a first plug assembly, the first shell is axially connected with the second shell in an inserted mode, and the plug assembly is connected with the socket assembly in an inserted mode. A blind hole is formed in the oil injection valve body in the axial direction, a through hole communicated with the blind hole penetrates through the oil injection valve body in the lateral direction, the flexible insulation sleeve comprises a lip ring wrapping the outer side of the oil injection valve body, the first plug assembly detachably seals the blind hole, an oil injection hole communicated with the interior of a cable is formed in one of the first shell and the second shell in the radial direction, and the oil injection valve body is installed in the oil injection hole in the axial direction of the oil injection valve body. At least part of the oil injection valve body penetrates through the oil injection hole to enable the through hole to be communicated with the interior of the cable. The lip ring covers the through hole for sealing.

The application discloses a pin shaft assembly, a pin shaft pair and a roller cage, wherein the pin shaft assembly is the basis of the pin shaft pair, the pin shaft pair can be used as the pin shaft pair of the roller cage, and the pin shaft assembly comprises a pin shaft, the pin shaft is provided with a shoulder at both ends, end faces of the pin shaft are provided with coaxial taper blind holes, at least two notches are formed in side walls of the taper blind holes, a taper plug is matched with the taper blind hole, a cover is matched with the shoulder, and the cover is used for pressing the taper plug to press the taper plug into the taper blind hole, so that the shoulder is expanded to form an interference connection or a form locking with the cover. The pin shaft assembly disclosed by the application has good reliability, and the gap between the pin shaft assembly and a pin shaft hole is relatively easy to control.

The invention relates to the technical field of steel structures, in particular to a bearing type hot-rolled metal steel beam structure which comprises a vertical beam, cross beams are connected to the two parallel side faces of the vertical beam through fasteners formed by a plurality of sets of screws and first nuts, a plurality of penetrating openings are formed in one side face of each cross beam at equal intervals, and a plurality of column rods are arranged on the two sides of each cross beam. Threaded blind holes are machined in the two ends of each column rod, studs are in threaded connection with the interiors of the opposite threaded blind holes of every two adjacent column rods, rooting plates are inserted into the penetrating openings, the studs penetrate through the rooting plates, second nuts are arranged on the two sides, in the length direction of the studs, of the rooting plates, and the second nuts are in threaded connection with the studs. The invention has the following beneficial effects: the load is uniformly distributed on the whole cross beam and the connecting structure, the acting force is prevented from being concentrated on the connecting part of the cross beam and the vertical beam, and the hidden danger of stress concentration is fundamentally eliminated.

The invention belongs to the technical field of nuclear power, and particularly relates to a pressure self-driving type separation pressure relief device. The device is driven to be opened through unbalanced force caused by medium pressure to the valve rod assembly. The separation structure is arranged, and the bearing bush and the separator can complete the separation action when the required separation pulling force is applied; the protector is of an integrated structure, one end of the protector is designed to be a blind hole, the head of the protector is designed to be a weak area, zero leakage is kept in a closed state under the normal working condition, when medium pressure reaches starting pressure, the disengaging structure is disengaged, the valve rod breaks the protector in a pulling mode, and the opening action is completed. The whole action process does not depend on external energy, signals, manpower and other operations, has the characteristic of high reliability, and can be applied to numerous key parts needing to execute the pressure relief function.

This invention provides a glass-based heterogeneous integrated structure with back vias and its fabrication method. Back vias are designed on a heterogeneous integrated wafer. The heterogeneous integrated wafer includes a glass substrate and a piezoelectric crystal layer, or at least one heterogeneous thin film layer is bonded between the glass substrate and the piezoelectric crystal layer. The back vias are blind vias and / or through-holes, with the blind vias etched to reach the piezoelectric crystal layer or any heterogeneous thin film layer. Filler metal is sputtered into the back vias. Before etching the front piezoelectric crystal layer, a surface acoustic wave (SAW) filter pattern can be fabricated on the complete surface of the glass-based heterogeneous integrated wafer with back vias. After etching the piezoelectric crystal layer, the bottom of the filler metal is exposed on the surface of the glass-based heterogeneous integrated wafer. The SAW filter and the filler metal are then interconnected through photolithography, evaporation or sputtering, electroplating, etc. The blind vias can be arranged into a folded inductor, connected to the front device layer through the through-holes. This invention features better device heat dissipation, improved package design and mass production capabilities, higher integration density, and higher device Q-value.

A heat exchanger comprises a pipe connection structure consisting of a first coupling element and a second coupling element. The first coupling element includes a through-hole formed through it, and the second coupling element includes a blind hole formed within it. A distribution tank comprises a first tank chamber aligned with the through-hole of the first coupling element and a second tank chamber aligned with the blind hole of the second coupling element. The through-hole provides a fluid connection between the interior of the pipe connection structure and the first tank chamber, while the second coupling element forms a fluid barrier wall at one end of its blind hole, preventing fluid communication between the interior of the pipe connection structure and the second tank chamber via the second coupling element.

The application relates to a rotor assembly and a drilling and tapping machine, a plurality of blind holes are formed in the inner wall of a rotor cylinder, a permanent magnet is in contact with the inner wall of the rotor cylinder, the permanent magnet is formed with a first through hole, a screw is inserted into the blind hole through the first through hole, and the screw is in threaded connection with the blind hole. The drilling and tapping machine for machining the rotor cylinder is characterized in that a plurality of positioning blocks are fixedly connected with a positioning seat, the positioning blocks are formed with positioning grooves, a rotating table drives a cutter to rotate in the circumferential direction, a first motor drives the cutter to axially move through a transmission mechanism, a radial movement assembly drives the cutter to move in the radial direction, and a second motor drives the cutter to rotate. The permanent magnet and the rotor cylinder are fixed by means of the blind holes in the rotor cylinder and the screws, the outer surface of the rotor cylinder is not damaged, and the problem of deformation of the outer side of the rotor cylinder is solved; the cutter is located in the rotor cylinder, the rotating cutter can move in the radial direction and the axial direction and rotate in the axial direction relative to the rotor cylinder, and the problem that a general tapping machine cannot tap in the rotor cylinder is solved.

To provide a manifold having a housing capable of reducing pressure loss of a refrigerant circulating in a flow passage.SOLUTION: A manifold 10 through which a refrigerant F1 flows includes a housing 11 in which a plurality of bottomed holes 12a, 12b, 12c, 12d, 12e are formed, and opening ends of the bottomed holes 12a, 12b,,, are positioned at a side 11a, and heat exchangers 3, 5. 12c 12d 12e. The heat exchangers 3 and 5 have refrigerant inflow ports 3a and 5a, refrigerant outflow ports 3b and 5b, coolant inflow ports 3c and 5c, and coolant outflow ports 3d and 5d. An opening end of at least one of the bottomed holes 12a, 12b among the plurality of bottomed holes 12a, 12c, 12c, 12d, 12e is closed by the first devices VE1, VE2. The opening ends of the bottomed holes VE1, VE2 closed by the first devices 12a, 12c are located closer to the refrigerant inflow ports 3c, 5c and the refrigerant outflow ports 3d, 5d than the coolant inflow ports 3a, and the coolant outflow ports,. 5a 3b 5b.SELECTED DRAWING: Figure 3

The cable support capable of monitoring the clamping state in real time is characterized in that a cam rod is provided with a large-section section and a small-section section, at least two blind holes are formed in the large-section section, and at least two arc-shaped grooves are formed in the side face, close to the tail end, of the small-section section; a sunken part deeper than the groove body is arranged in the arc-shaped groove; the ball can move along the arc-shaped groove and reside in the sunken part; the connecting sleeve is provided with at least two conical grooves corresponding to the axial positions of the arc-shaped grooves, and the balls are embedded into the conical grooves. The nut is matched with the external thread part of the connecting sleeve, and the ball can be embedded and sunken when the cam rod is rotated; at least two kidney-shaped holes are formed in the side wall of the shell in the axial direction, the studs penetrate through the kidney-shaped holes and the blind holes, and the studs are used for axially guiding and preventing relative rotation of the cam rod and the shell; the spring is arranged in the shell and sleeves the small-section section; one end of the force sensor abuts against the shell, and a gap for a clamped part is reserved between the other end of the force sensor and the connecting sleeve. The force sensor is integrated, real-time monitoring of clamping force is achieved, and the clamping force can be accurately adjusted and designed.

Press (10), in particular for machining, such as deburring, workpieces, comprising at least one press device with a press cylinder (24) having a press piston rod (22) and a hold-down cylinder (32) with a hold-down piston rod (40), wherein the press piston rod is connected to a holder (20) for a tool via a flange plate (26), characterized in that the workpiece-side end face (28) of the flange plate (26) of the press piston rod (22) has a passage opening (52) which can be passed through by the hold-down cylinder (32) integrated in the press piston rod (22), the hold-down cylinder housing (42) of which is inserted in a blind opening (36) extending from the workpiece-side end face (34) of the press piston rod (22).

A method is provided for modifying a via from a PCB including a plurality of subassemblies comprising a plurality of layers. The method may include drilling a via of the PCB to form a through-hole to remove an unwanted material in the via of the PCB. The method may also include depositing a carbon-based material over an inner wall of the through-hole. The method may further include back drilling a first portion of the through-hole by a drill from the top of the PCB to form a first blind via. The method may also include selectively plating a conductive material over the carbon-based material to form a plated through-hole.

The utility model discloses a water punching eccentric water receiving valve with flow indication, which belongs to the technical field of valves, and comprises a valve body and a valve cover, and the valve body and the valve cover are provided with water outlet holes; an eccentric linkage column door is rotationally mounted in the valve body, and an eccentric hole with the same size as the water outlet hole is formed in the eccentric linkage column door in a penetrating manner; a flow indicating through hole as large as the eccentric hole is formed in the valve cover, and a flow indicating blind hole as large as the eccentric hole is formed in the upper surface of the eccentric linkage column door; when the eccentric hole is aligned with the water outlet hole in the forward direction, the flow indicating blind hole is also aligned with the flow indicating through hole in the forward direction; if the eccentric linkage column door is rotated, the coincidence degree between the flow indicating blind hole and the flow indicating through hole is completely the same as the coincidence degree between the eccentric hole and the water outlet hole. When the valve is used for adjusting the water outlet flow, the overlap ratio between the flow indicating blind hole and the flow indicating through hole is observed to represent the overlap ratio between the eccentric hole and the water outlet hole, so that the flow of the water outlet hole at the moment can be accurately mastered.

A handle is provided with a body made of a material which is a multi ply resin impregnated wood, at least two of the plys are dyed different colors and are arranged in a pattern within the body, the body has a proximal end and a distal end, the distal end includes a base. An insert is positioned in a blind hole of the base and the insert is made of a second material different from the material and a distal most portion of the insert is positioned flush or below the base. The insert includes a female threaded portion having a central axis and the insert is mounted in the material and the proximal end of the body excludes one or more through holes. The body is symmetrical about the axis and includes one or more sections which include a circular cross section taken across the axis and a side profile of the body varies in width measured through the axis between the proximal and distal ends. All of the plys are arranged substantially parallel to the axis such that a side surface of the body includes portions where the plys are seen substantially vertically arranged along the axis and another side where plys create a variable shaped pattern.

This invention provides an open-type internal extrusion forming die and a forming process for large-size blind hole shells, including a die cavity, a forming punch, and an extrusion punch. A laterally movable inner die is provided on the die cavity, and an ejector rod is provided on the inner die. The die cavity and the inner die cavity together form a workpiece cavity with a variable shape. The inner die has a vertically arranged first chamber and a second chamber, both of which can connect with the die cavity. The process steps include: pulling the pressure block upwards so that the distance between the two clamping plates is greater than the outer diameter of the blank; feeding the blank from the top of the die cavity; controlling the forming punch to move downwards until the blank fills the workpiece cavity under the action of the forming punch; controlling the forming punch to return; controlling the ejector rod to move upwards until the top flange of the preform is above the clamping plates. This invention can not only smoothly and quickly produce large-size blind hole shells, but also significantly reduce the end allowance of the blank required during the forming process.

A header part of an implantable medical device, a method for manufacturing the header part and a plug assembly which can be joined into the header part are described. The header part has a header part housing with at least one blind-hole-like plug contact socket with a socket opening and a socket bottom axially opposite the socket opening, at least one electrically conductive contact ring element and an electrically insulating, elastically deformable sealing ring are joined in a coaxial arrangement and in axially successive order along the second plug contact socket, which contact ring element and which sealing ring are surrounded by a hardened casting material. The invention is characterized in that at least one second blind-hole-like plug contact socket is arranged inside the header part, which second plug contact socket has a socket opening and a socket bottom axially opposite the socket opening, at least one electrically conductive contact ring element and an electrically insulating, elastically deformable sealing ring are joined in a coaxial arrangement and in axially successive order along the second plug contact socket, which contact ring element and which sealing ring are surrounded by a hardened casting material, the socket bottoms of the two plug contact sockets are each delimited by a connection which is at least partially surrounded by hardened casting material, and the connection contains a through channel which opens on both sides into the blind-hole-like plug contact socket.

Embodiments of the present disclosure provide coupling structure for dielectric filter and filter. The filter comprises at least one dielectric block made of a dielectric material with metalized surfaces, and the block comprises at least two frequency tuning structures and the coupling structure located between two of the at least two frequency tuning structures; wherein the coupling structure comprises a blind hole, a through hole, a conducting structure connecting the blind hole and the through hole, and an isolation area surrounding the blind hole, the through hole and the conducting structure.

The invention discloses a kerosene sealing test clamp and method for a graphite sealing device. The test clamp is mainly composed of a sealing ring, a support, a screw, an extrusion flat plate, a nut, a base and an oil inlet nozzle. A cylindrical protrusion is arranged on the upper end face of the base, a cylindrical blind hole is formed in the top face of the cylindrical protrusion and serves as a cavity for containing the graphite sealing device, external threads are machined on the outer surface of the cylindrical protrusion, an oil liquid flow channel is formed in the bottom face of the cylindrical blind hole, the oil liquid flow channel extends to one outer surface of the base, and an oil liquid connector is formed in the surface of the oil liquid flow channel. The oil inlet nozzle is connected to the oil liquid connector, the sealing ring, the support and the nut are installed on the base, the screw is installed on the support, and the extrusion flat plate is placed between the screw and the cylindrical protrusion. During a sealing test, the requirement of the graphite sealing end face displacement is met by controlling the screw pitch of the screw, and axial sealing of the graphite sealing device is achieved through the nut and the sealing ring. Effectiveness of a graphite sealing test is guaranteed, the activity amount of the end face in the test process is accurately controlled, and the sealing effect is good.