34results about How to "Avoid excessive local stress" patented technology

The invention provides a biological tendon repairing material and a preparation method thereof. The biological tendon repairing material comprises an extracellular matrix body subjected to immunogen removal, wherein the extracellular matrix body consists of one or more layers and comprises a first surface and a second surface; the first surface comprises a first area and a second area; the mechanical strength of the first area is lower than that the second area. During preparation of an extracellular matrix subjected to immunogen removal, layering is avoided. As the biological tendon repairingmaterial is provided with the surface which consists of the first area and the second area, cellular infiltration of defective tissues is facilitated, tissue repairing is accomplished, stress born bythe repairing material can be uniformly distributed, and local stress cannot be excessively large. Besides, the surface has a high suture retention force and can serve as the second surface of a suture area of the repairing material, and the strength of the repairing material can be guaranteed while repairing of the defective tissues is facilitated.

A continuous belt press has upper and lower platens defining a horizontal gap. Upper and lower upstream drums and downstream are rotatable on the frame about respective horizontal drum axes at the upstream and downstream ends of the gap. Upper and lower endless steel belts spanned over the respective upper and lower drums each have a working stretch supported by respective upper and lower sets of rollers on the respective platens. Each belt has a pair of edges projecting transversely past the respective rollers and at least one of the drums of each of the belts has a substantially cylindrical central region of a predetermined central diameter bearing through the respective rollers on the working stretch of the respective belt and a pair of edge formations of smaller diameter than the central-region diameter lying outside the central region and in engagement with the edges of the respective belt.

The invention relates to a bending-resistant metal hose with a connector protection device. The bending-resistant metal hose comprises a corrugated pipe, a net sleeve and connectors, wherein the net sleeve wraps the outer surface of the corrugated pipe, the connectors are arranged at the two ends of the corrugated pipe, each connector comprises a fixed flange and a loose flange, one end of the corrugated pipe is welded to the fixed flange through a short connecting pipe, and the other end of the corrugated pipe is connected with a welding ring through a long connecting pipe; and the bending-resistant flexible connector protection device is arranged at an end of the corrugated pipe, and the protection device comprises a flexible ring embedded in the wave trough of the corrugated pipe, a spring wound on the outer surface of the net sleeve, and a flexible sheath wrapping the outer surface of the net sleeve. According to the bending-resistant metal hose, the protection device is arranged at the connector of the metal hose, so that the circumstance that the hose is bent along the root is avoided, the stress condition of the root of the hose is dispersed, the local stress is prevented from being too large, and the metal hose is effectively protected; and meanwhile, the corrugated pipe has the bending resistance, the service life of the metal hose is prolonged, and potential safety hazards possibly occurring in the using process are eliminated.

The invention discloses a quick hole-milling positioning tool for a strong-sucking type eccentric upper seal flange. The quick hole-milling positioning tool comprises positioning rings and a positioning disc. The positioning disc is provided with a group of arc-shaped side walls and eccentric positioning pin, the arc-shaped side walls form an excircle, the inner surface of each arc-shaped side wall and each end plane are connected through an inclined plane, and the two inclined planes constitute a conical surface. The quick hole-milling positioning tool further comprises air cylinders, an electromagnetic valve and pressure heads made of wear-resistant rubber, and the bottom of each pressure head is upwardly recessed to form a cavity. The inclined planes constitute the conical surface functioning in guiding placing of a seal plate, the seal plate can be quickly and conveniently placed in, and clamping speed is increased. By the aid of air pressure, the pressure heads and the seal plate can be fixed, lines on the surfaces of workpieces can be reduced due to large contact area, and cooling pipes are arranged in support columns in a concealed manner, so that space is not occupied, the structure is simplified, and the pursuit of simplicity and high efficiency is realized.

The invention discloses a multistation processing tool for a strong-suction-type eccentric upper sealing head flange. The multistation processing tool comprises a positioning ring, a positioning disc, circular-arc-shaped side walls, a positioning pin, a cushion block, air cylinders, electromagnetic valves and pressing heads, the middle portion of the cushion block is cut to form a diversion groove, the pressing heads are made by wear-resistant rubber, and the bottom of each pressing head upwards concaves to form a cavity. A conical face is formed through two bevels and plays a role in guiding putting-in of a sealing plate, and convenience is brought to quick putting-in of the sealing plate, so that clamping speed is increased; the pressing heads and the sealing plate can be fixed by only utilizing pressure of air, patterns generated on the surface of a workpiece can be reduced due to large contact area, and cooling liquid slips away from the diversion groove after flowing through a processing area, so that the phenomenon that the cooling liquid at the bottom locally accumulates and does not circulate due to the fact that the cooling liquid after cooling overflows from the upper side in the prior art is avoided, cooling can be realized better, and cooling effect is improved.

The invention provides a biological tendon repairing material and a preparation method thereof. The biological tendon repairing material comprises an extracellular matrix body subjected to immunogen removal, wherein the extracellular matrix body consists of one or more layers and comprises a first surface and a second surface; the first surface comprises a first area and a second area; the mechanical strength of the first area is lower than that the second area. During preparation of an extracellular matrix subjected to immunogen removal, layering is avoided. As the biological tendon repairingmaterial is provided with the surface which consists of the first area and the second area, cellular infiltration of defective tissues is facilitated, tissue repairing is accomplished, stress born bythe repairing material can be uniformly distributed, and local stress cannot be excessively large. Besides, the surface has a high suture retention force and can serve as the second surface of a suture area of the repairing material, and the strength of the repairing material can be guaranteed while repairing of the defective tissues is facilitated.

The invention provides a high-speed mixing bed adopting a spiral fluid director water distribution plate and a hexagonal unit perforated plate. The high-speed mixing bed comprises an arc-shaped top shell, a fan blade plate type water distribution plate and a water distribution perforated plate, wherein a water inlet is formed in the top end of the arc-shaped top shell, the fan blade plate type water distribution plate is arranged right below the water inlet, the water distribution perforated plate is arranged right below the fan blade plate type water distribution plate, the fan blade plate type water distribution plate comprises a central block and a plurality of upwarp fan blade plates which are uniformly connected to the central block, the water distribution perforated plate comprises a plurality of hexagonal unit plates and a plurality of arc-shaped plates, the hexagonal unit plates are spliced together, and the arc-shaped plates are spliced on the peripheries of the hexagonal unit plates. The high-speed mixing bed adopting the spiral fluid director water distribution plate and the hexagonal unit perforated plate has the advantages of scientific design, high water distribution uniformity, long service life and high purification efficiency.

The invention discloses a hole-milling quick positioning tool for an eccentric upper sealing head flange. The hole-milling quick positioning tool comprises a positioning ring, a positioning disc, air cylinders, electromagnetic valves and pressing heads, a set of circular-arc-shaped side walls and an eccentric positioning pin are arranged on the positioning disc, the circular-arc-shaped side walls form a cylindrical excircle, the inner-side surface of each circular-arc-shaped side wall and an end-portion plane are connected through a bevel, two bevels form a conical face, the air cylinders extend and contract to drive the pressing heads to press or release a workpiece, a cooling liquid pipeline is arranged inside each of inner columns and outer columns, and a quick plug communicated with the corresponding cooling liquid pipeline is mounted on each of the inner columns and the outer columns. The conical face is formed by the two bevels and plays a role in guiding putting-in of a sealing plate, and convenience is brought to quick putting-in of the sealing plate, so that clamping speed is increased; by means of arranging cooling pipelines inside supporting columns, the cooling pipelines are contained in the supporting columns, so that no space is occupied, structure is simplified, and the objectives of compactness and high efficiency are achieved.

The invention discloses an improved hole milling clamp for an eccentric upper sealing head flange. The improved hole milling clamp comprises a positioning ring, a positioning disc, air cylinders, electromagnetic valves and pressing heads, a set of circular-arc-shaped side walls and an eccentric positioning pin are arranged on the positioning disc, the circular-arc-shaped side walls form a cylindrical excircle, the inner-side surface of each circular-arc-shaped side wall and an end-portion plane are connected through a bevel, two bevels form a conical face, a cushion block is arranged on the positioning disc, and the middle portion of the cushion block is cut to form a diversion groove; the air cylinders extend and contract to drive the pressing heads to press or release a workpiece, a cooling liquid pipeline is arranged inside each of inner columns and outer columns, and a quick plug communicated with the corresponding cooling liquid pipeline is mounted on each of the inner columns and the outer columns. Better cooling effect can be realized by utilizing the diversion groove, so that cooling effect is improved; by means of arranging cooling pipelines inside supporting columns, the cooling pipelines are contained in the supporting columns, so that no space is occupied, structure is simplified, and the objectives of compactness and high efficiency are achieved.

The present invention is a medium-frequency simmering process for A335P92 material elbow, which is characterized in that it includes the following steps: determining the width B of the induction heating ring: the width B of the induction heating ring for simmering the thick-walled elbow used for the main steam pipeline = (2T1‑50)㎜, the width of the induction heating ring of the thin-walled elbow used for simmering heating and reheating steam pipes is B=2T2㎜, so as to prevent wrinkles at the arcing position of the elbow when it just exits the induction coil during intermediate frequency simmering ;Determine the pushing speed of intermediate frequency simmering pipe bending: the pushing speed of intermediate frequency simmering bending pipe is controlled at 10-15mm / min, so as to control the local excessive stress generated in the process of intermediate frequency simmering; determine the process section; The above process section is composed of transition section + top material, the transition section is made of low chromium molybdenum steel, the length of the transition section is L≤500mm, and can be reused, the top material is made of carbon steel pipe; intermediate frequency simmering system; cooling temperature is determined; intermediate frequency simmering molding The final heat preservation measures; heat treatment in time after intermediate frequency simmering.

The present disclosure provides a front structure of a vehicle body, the front structure of the vehicle body comprising: a front side member assembly, including: a front side member inner panel, a front side member cover plate and a front side member support plate, the front side member inner panel The panel includes a longitudinal beam bottom plate and two longitudinal beam side panels on opposite sides of the longitudinal beam bottom plate, both of the longitudinal beam side panels are connected to the front longitudinal beam cover plate and the front longitudinal beam cover plate Opposite to the longitudinal beam bottom plate, a part of the front longitudinal beam support plate is located in the groove enclosed by the longitudinal beam bottom plate and the longitudinal beam side plate, and the front longitudinal beam support plate is located in the groove The part is connected with the longitudinal beam bottom plate and the longitudinal beam side plate, and the plate surface of the front longitudinal beam support plate is connected with the side edge of the front longitudinal beam cover plate; the front wheel house side reinforcement beam is connected with The parts of the front side member support plate outside the groove are connected. The present disclosure can improve the energy absorption effect of the front structure of the vehicle body and reduce the deformation amount of the passenger compartment.

The invention discloses a quick hole-milling positioning tool for a strong-sucking type eccentric upper seal flange. The quick hole-milling positioning tool comprises positioning rings and a positioning disc. The positioning disc is provided with a group of arc-shaped side walls and eccentric positioning pin, the arc-shaped side walls form an excircle, the inner surface of each arc-shaped side wall and each end plane are connected through an inclined plane, and the two inclined planes constitute a conical surface. The quick hole-milling positioning tool further comprises air cylinders, an electromagnetic valve and pressure heads made of wear-resistant rubber, and the bottom of each pressure head is upwardly recessed to form a cavity. The inclined planes constitute the conical surface functioning in guiding placing of a seal plate, the seal plate can be quickly and conveniently placed in, and clamping speed is increased. By the aid of air pressure, the pressure heads and the seal plate can be fixed, lines on the surfaces of workpieces can be reduced due to large contact area, and cooling pipes are arranged in support columns in a concealed manner, so that space is not occupied, the structure is simplified, and the pursuit of simplicity and high efficiency is realized.

The invention provides a tow hook installation structure, which comprises a through hole formed at the bottom of the groove of the front anti-collision beam for the tow bar to pass through, a nut seat is arranged behind the through hole, and a threaded section of the tow bar in the vehicle length direction is provided. An expansion unit is arranged immediately in front of the unit. After the threaded section of the trailer rod is screwed into the nut seat, the rear end of the expansion unit and the nut seat are squeezed to drive the front end of the expansion unit to open, and the front end of the expansion unit is opened. The bottom of the groove constitutes a limit fit for restricting the forward displacement of the tow bar relative to the front crash beam. The common threaded pipe installation structure is cancelled, so as to prevent the excessively long rigid threaded pipe structure from occupying the compression space of the energy-absorbing box, and at the same time, a nut seat is reduced on the basis of the solution of the applicant's previous application, which makes the trailer When the hook is installed, only one nut seat is required to avoid mutual interference when multiple nut seats are installed together.

The invention discloses a hole-milling assisting device for an eccentric upper sealing head flange. The hole-milling assisting device comprises a positioning ring, a positioning disc, air cylinders, electromagnetic valves and pressing heads, a set of circular-arc-shaped side walls and an eccentric positioning pin are arranged on the positioning disc, the circular-arc-shaped side walls form a cylindrical excircle, and the air cylinders extend and contract to drive the pressing heads to press or release a workpiece. By utilizing the hole-milling assisting device, processing of an axis hole, four through holes and a strip-shaped hole can be completed on a milling machine, and a sealing plate is clamped only once during processing, so that processing efficiency is improved; the sealing plate is fixed in position and quite easy to clamp, so that aligning difficulty is lowered, and inaccuracy in clamping is avoided; a reference is taken as a processing reference of the side walls, the four through holes and the strip-shaped hole, so that high uniformity is maintained, qualification rate of finished products is increased, and the finished product qualification rate is improved to be more than 97%.

The invention discloses a connecting rod used for a suction filtration machine dewatering system. The connecting rod comprises a middle connecting rod body and two end connecting rod bodies which are the same in structure. The middle connecting rod body is a hollow seamless steel pipe. The two end connecting rod bodies are symmetrically installed on the two sides of the middle connecting rod body in an inserted mode and are welded and fixed. Threads are arranged on the two end connecting rod bodies. The end connecting rod bodies are made of 0Cr19Ni9 steel. According to the connecting rod used for the suction filtration machine dewatering system, an original overall connecting rod design structure is changed into a segmented welding structure, the size of the middle connecting rod body is increased, so that the connecting rod is attached to a filter fan better; shaking in the production process is reduced, a whole fan plate is located in a compact integral structure, the integral structure strength is improved, and the situation that the stress borne locally is too large is avoided; and meanwhile, the force bearing point of the connecting rod is skillfully transferred to the welding position through the structure, the end connecting rod bodies are inserted into the middle connecting rod body by enough length, and the stress can be effectively dispersed, so that a stress concentration part is changed from a point to a surface, and the connecting rod stress bearing level is effectively improved.

The invention discloses a hole-milling clamping device for an eccentric upper sealing head flange. The hole-milling clamping device comprises a positioning ring, a positioning disc, air cylinders, electromagnetic valves and pressing heads, a set of circular-arc-shaped side walls and an eccentric positioning pin are arranged on the positioning disc, the circular-arc-shaped side walls form a cylindrical excircle, the inner-side surface of each circular-arc-shaped side wall and an end-portion plane are connected through a bevel, two bevels form a conical face, and the air cylinders extend and contract to drive the pressing heads to press or release a workpiece. By utilizing the hole-milling clamping device, processing of an axis hole, four through holes and a strip-shaped hole can be completed on a milling machine, and a sealing plate is clamped only once during processing, so that processing efficiency is improved; the sealing plate is fixed in position and quite easy to clamp, so that aligning difficulty is lowered, and inaccuracy in clamping is avoided; a reference is taken as a processing reference of the side walls, the four through holes and the strip-shaped hole, so that high uniformity is maintained, qualification rate of finished products is increased, and the finished product qualification rate is increased to be more than 97%.