157results about How to "Improve seam quality" patented technology

A method and an apparatus for joining two workpieces by means of a processing beam by forming a weld seam along a lap joint, wherein a gap formed at the lap joint between the two workpieces is filled during welding. The processing beam performs a spatial oscillatory movement parallel and/or perpendicular to the joint during welding. The oscillation parameters of said oscillation, the feed rate, the power of the processing beam and the angle of incidence of the processing beam onto the surfaces of the workpieces are adjusted dynamically during the welding process such that the upper sheet is fused in line with demand and the melt flows from the upper sheet down to the lower sheet thus closing the gap. The gap height is measured permanently during welding and the process parameters are adjusted such that a reliable closing of the gap is made possible.

The invention discloses production equipment and a production technology for an HDPE (high density polyethylene) spirally enwound structure-wall pipe (Krah pipe).The equipment comprises a base trolley, cooling fans, a mold roller, rolling wheels, a servo motor, an infrared heating device and a rotating rod. The technology comprises material mixing, feeding, vacuum feeding, extrusion, enwinding, turning, demolding, modification, electric fuse distribution, inspection and storage. According to the production equipment and the production technology, infrared high-frequency heating is adopted, the heating efficiency is high, the cost is low, and the operation is simple and convenient; the ring stiffness is increased by above 30% due to addition of short-glass-fiber master batches; characteristics of HDPE are adopted, so that the comprehensive performance of the pipe is improved; the weld seam quality of the pipe is guaranteed, and the weld seam quality and the overall external pressure resistance of the pipe are also improved.

The invention discloses a building roof construction process. A construction roof comprises a roof structure plate, a parapet wall and a roof surface layer, wherein the parapet wall is arranged above the roof structure plate, the roof surface layer is paved on the roof structure plate, a roof exhaust system is arranged on the construction roof and comprises a plurality of first horizontal exhaust pipes, the first horizontal exhaust pipes are respectively laid in a slope finding layer or a heat insulation layer in the roof surface layer, two ends of each first horizontal exhaust pipe are respectively connected with a vertical exhaust pipe, and the vertical exhaust pipes are embedded in the side walls of the parapet wall and a discharge flue or the side wall of an exhaust passage. The construction process of a construction roof comprises the steps of 1, surveying and setting out; 2, parapet wall, discharge flue and exhaust passage construction; 3, horizontal exhaust pipe positioning installation; 4, exhaust pipe connection; 5, roof surface layer construction; and 6, rigid protecting layer mesh division and caulking construction. The construction process has the advantages that the steps are simple, the operability is high, the realization is convenient, in addition, the work efficiency is high, the construction effect is good, and the construction quality of the construction forming building roof can be effectively ensured.

A method is provided for producing a bonded joint between fiber-reinforced thermoplastic parts to be joined, in which fiber-containing plastic material is mixed into the joining zone while friction stir welding the parts to be joined in the form of a butt joint. A device for carrying out such a method for a joined component is also provided.

The invention discloses a method for constructing a high pier, which comprises the following steps of: 1) constructing a first section of pier through at least two upper and lower templates; 2) after concrete strength in a bottom template is more than or equal to 75 percent of design strength and concrete strength in the uppermost template is more than or equal to 2.5Mpa, detaching the bottom template and turning the bottom template above the uppermost template to serve as a second section of pier for installation, and finishing construction of the second section of pier; and 3) repeating the step 2) until construction of the whole pier is finished. Compared with a sliding formwork method, the method has the advantages that: the molding period is short, the pier is convenient to construct, and the method is convenient to operate; and compared with a creeping formwork method, the method has the advantages that: the molding period is short, a high scaffold is not needed to be erected, a few materials are occupied, and construction cost is low. The method has the advantages of sliding formwork and creeping formwork construction methods, the turnover period of the template is short, the construction period of each section of pier is short and is generally about five days, and the concrete joint of the pier has high quality.

The invention relates to a concrete pavement crack clearing and filling integrated device. The device comprises a movable trolley, an inner crack impurity removing device, a cleaning and brushing device, an air blowing and drying device, a crack filling device, a lifting component and a sludge residue collecting device, wherein the air blowing and drying device, the crack filling device and the lifting component are all arranged on the movable trolley, and the inner crack impurity removing device and the cleaning and brushing device are arranged on the lifting component. The sludge residue collecting device is arranged on the moving trolley and is used for collecting sludge which is cleaned out from cracks by the inner crack impurity removing device. The method has the beneficial effects that crack cleaning and filling can be completed at the same time, cleaned sludge can be collected, walls of cracks the can be dried and the filling depth can be controlled according to different seasons, thus achieving high working efficiency and good quality in crack filling.

The invention discloses an efficient sock butend sewing machine rivaling manual butend sewing. The efficient sock butend sewing machine comprises a butend sewing motor for driving the sock butend sewing machine and a conveying motor for driving a sock conveying system; the efficient sock butend sewing machine is characterized in that the sock conveying system comprises a front-section conveying system body, a rear-section conveying system body, a butend sewing machine body, two machine heads and two lifting systems, wherein the butend sewing machine body, the two machines head and the two lifting systems are arranged on a mounting platform board. According to the efficient sock butend sewing machine rivaling manual butend sewing, the sewing width is small, the sewing speed ratio is adjustable, and the two machine heads share one center shaft, so that sewing lines of secondary sewing are highly consistent in coaxality.

The invention discloses a method for artificial building of a hot dry rock heat storage layer. Heat storage layer joint forming is conducted through the layered segment blasting joint forming mode. A plurality of cavities with certain widths are formed in a horizontal well segment at equal intervals through a high-pressure pulse jet flow drill tool, liquid explosives are injected into a horizontal well, and then an electromagnetic initiator is put down from an injection well. Then rock powder is backfilled to a production well and the injection well correspondingly, and the well hole sealing effect is achieved. Meanwhile, a microseismic monitoring device is put down from a monitoring well to monitor the blasting joint forming effect. After blasting is implemented, when cracks are sufficiently developed, blasting operation can be implemented again. When artificial crack swarms meet the design requirements, blasting operation can be stopped. According to the method for artificial building of the hot dry rock heat storage layer, the joint forming quality can be improved, the large-size artificial crack swarms are formed, meanwhile large hydraulic fracturing is not needed, increasing of the utilization rate of a hot dry rock layer is facilitated, and conditions are provided for achievement of commercial use of hot dry rocks.

The invention relates to a device for welding and separating a packaging material (4) for a package, comprising an ultrasonic welding device (2) with a sonotrode (3) and an anvil (5) for sealing the packaging material (4), wherein the sonotrode (3) is rotatable about a first axis of rotation (X) and the anvil (5) is rotatable about a second axis of rotation (Y), and a cutting device (6) with at least one blade (7) for separating the packaging material (4), which device is arranged in the anvil (5), wherein the at least one blade (7) is arranged on the anvil (5) in such a way that a minimum distance (S) between the sonotrode (3) and a cutting edge (8) of the blade (7) is maintained, and so the packaging material (4) can be severed without any contact between the sonotrode (3) and the blade (7).

The invention relates to a new method for patching pavement. Crack in pavement and fillers filled therein are heated firstly to melt asphalt thereof into liquid state so that the two end surfaces of the crack and the fillers are melted integrally with a heating temperature of 100-200 DEG C. The invention solves the problem that the traditional pavement patching glue and the end surfaces of the crack are not firmly spliced, and has the advantages of simple and convenient operation, good crack pouring quality, low cost, and energy-saving as well as environmental protection.

The invention discloses a different stitch length conversion device in a sewing system. The different stitch length conversion device comprises a main motor, a speed ratio conversion device and a disc sewing machine. The speed ratio conversion device comprises a main driving wheel, a motor shaft of the main motor is sleeved with the main driving wheel, and the main driving wheel is sleeved with a first conveying belt and a second conveying belt. The speed ratio conversion device further comprises a needle rake moving device and a disc moving device, the needle rake moving device is sleeved with the other end of the first conveying belt, and the disc moving device is sleeved with the other end of the second conveying belt. A third gear driving a collar moving needle rake is arranged on the needle rake moving device. The disc moving device is fixed to a disc of the disc sewing machine, and a fourth gear driving the disc to rotate is arranged on the disc moving device. A collar moving needle on the collar moving needle rake and a needle on the disc can do synchronous movement through the first conveying belt and the second conveying belt arranged on the driving belt wheel in a sleeving mode, and conversion from linear stitch length to disc stitch length is achieved.

The invention relates to a method for laser cutting of a 0.5 mm stainless steel. The method comprises the following steps: (1) removing greasy dirt and dust on the surface of stainless steel, and keeping the surface of the stainless steel smooth; and (2) cutting a 0.5 mm stainless steel panel by a ProCutter laser cutting gun, wherein the technological parameters are as follows: the cutting speed is 14-16 m/min; the laser power is 1-2kW; the gas pressure is 1-2 MPa; the defocusing amount is -1-0 mm; the working distance is 0.6 to 1.0 mm; the diameter of a cutting nozzle is 0.8 to 1.2 mm; and the cutting gas is nitrogen. The method is stable in process, has repeatability, is safe, stable and reliable, and a kerf is smooth, level, free of adhering slag and good in quality.

The invention relates to the preparation and the application of a biodegradable shape memory suture which can not only accurately control the wound closure tightness, but also solve the problem that the operational space for the wound in the body is restricted; at the same time, the cost of treatment is significantly reduced and no stitch removal is needed after the operation. Taking a biodegradable shape memory polymer as the raw material, the suture with required specification is obtained through molding and curing process. The using method of the suture mainly lies in the temperature control: before the suturing, the suture is heated to softening temperature and then stretched to suture the wound; after the suturing, the suture is heated again and restored to the initial shape, and then the suture gradually contracts and tightens until the wound is closed ideally; finally the suture is absorbed by the body gradually along with the time without any harm caused to the human body. The biodegradable shape memory suture can be widely used in human and animal surgery wound suture.

The invention relates to the technical field of medical instruments, and discloses a nursing surgical suture fixing device capable of keeping the humidity of surgical sutures. The device comprises a box body; the box body includes a fixed shaft, a first fixed column, a first sliding rail, a sliding groove, a suture exit hole, a second sliding rail and a second fixed column; the lower part of an L-shaped rod is connected with a connecting rod; a first spring is connected between the first fixed column and a first slider; the lower part of the connecting rod is connected with a blade; a second spring is connected between the second fixed column and a second slider; the outer side of the second slider is connected with a longitudinal rod; and the lower end of a fixed block is connected with asponge. The second slider is driven by a transverse rod to move down; when restoring, the second slider moves along a right track of the second sliding rail; elastic deformation of the sponge is restored to push rotating wheels to rotate; and a surgical suture rotationally conveyed on each rotating wheel slides out through a suture conduit under the action of gravity. Such structure solves the problems that an existing surgical suture fixing device for operating room nursing cannot automatically feed sutures and the surgical sutures are wasted too much.

The invention discloses a pair of skin suturing pliers, which comprises clamping handles, first pliers arms and second pliers arms, wherein one end of each of the two groups of clamping handles is hinged and connected; the first pliers arms and the second pliers arms are independently rigid extension segments of two groups of clamping handles on the other side of a hinging point, and rigid extension segments of the free ends of two groups of clamping handles; the free ends of the first pliers arms can form clamping pliers heads; two groups of first pliers arms are independently provided with aneedle entering guide hole and a needle leaving guide hole, which are used for conventional suturing; the needle entering guide hole and the needle leaving guide hole are through in an alignment wayunder a state that the first pliers arms are clamped; the inner side of each second pliers arm is a clamping surface; the upper side surfaces of one group of second pliers arms are convexly provided with two groups of needle guiding seats used for beatification suturing; and each needle guiding seat is provided with a needle guiding hole used for a suturing needle to pass. According to the pair ofskin suturing pliers, conventional skin suturing and intracutaneous beatification suturing can be realized, a surgeon can independently finish a suturing and thread shearing operation and the accurate needling entering of intracutaneous suturing during operation wound suturing, suturing time is greatly shortened, and suturing quality is improved.

An automatic sweater sewing method based on machine vision perception comprises the following steps of: (1) starting automatic sweater sewing equipment; (2) conveying a sweater weaving piece into a stretching and freezing device from front to back from an input flattening device; (3) stretching the sweater weaving piece and freezing the sweater weaving piece into a rigid body convenient for sewingin the stretching and freezing device; (4) conveying the sweater weaving piece which is stretched and frozen into the rigid body to a sewing preparation device; and (5) finishing turning, carrying, sewing auxiliary pushing and sorting of the frozen sweater weaving piece by a carrying robot, and sewing an upper sweater weaving piece and lower sweater weaving piece which are correspondingly arranged up and down by using a sewing device. The method can replace prior manual sweater sewing, improves the processing efficiency, achieves the improvement of the sewing quality, achieves the stable consistency of products in batch production, and further improves the added value of the products; and the method has certain significance for promoting the development of equipment in the sweater weavingindustry in China.

The invention discloses a hook-and-loop tape sewing universal fixture, and relates to the field of sewing processing. The hook-and-loop tape sewing universal fixture is characterized in that a processing plane is enclosed in a fixture frame; clamping mechanisms are used for fixing to-be-sewn cloth into the processing plane; the clamping mechanisms are mounted in the fixture frame in such a manner that the clamping mechanisms can be continuously repositioned. The hook-and-loop tape sewing universal fixture has the advantages that the fixture frame can be fixed onto sewing equipment such as numerical-control sewing centers; the to-be-sewn cloth can be fixed by the aid of the clamping mechanisms instead of manual or gluing modes, accordingly, the fixing accuracy can be improved, potential safety hazards can be prevented, and the efficiency can be improved; the clamping mechanisms can be continuously repositioned relative to the fixture frame, and accordingly the to-be-sewn cloth can be positioned at required processing locations of the sewing equipment; the clamping mechanisms are continuously repositioned, and accordingly the positioning precision and the sewing quality of products can be improved.

The invention relates to a quick repairing device for roads. The quick repairing device comprises a moving base, scraper mechanisms and connecting rod mechanisms, wherein a U-shaped beam is mounted onthe top face of the moving base; material mixing mechanisms and a top-pressing mechanism; when doing a press-down action, a beating mechanism is linked with the material mixing mechanisms to ensure that tar in the material mixing mechanisms is mixed and stirred to obtain a mixture and the mixture is discharged downwards; a front group and a back group of the material mixing mechanisms are arranged; discharging mechanisms for discharging the tar materials downwards are also arranged on the two groups of material mixing mechanisms; the two scraper mechanisms are arranged; and because the beating mechanism has a thick column structure, the tar poured into cracks of the road can be tamped preferably, so that the seaming quality is improved; by adopting a linkage way, the left group and the right group of scraper mechanisms are arranged; when the scraper mechanisms operate inwards, the tar-like materials which are attached with the bottom of a beating plate due to beating of the tar can bescrapped downwards, and the phenomenon that pits are reserved on a tar connection part required for beating because of staying of adhesive materials when the tar surface is beaten again by adopting the beating plate is avoided; and the construction quality is improved.

A method of gas-shielded metal arc joining using a consumable electrode having an alternating polarity (GMA-AC). A shielding gas containing helium is used to improve process stability and working speed.