14 results about "Narrow face" patented technology

The invention provides a method for overcoming the slab narrow face transverse crack defect and application. A method for overcoming slab narrow face transverse crack defects comprises the steps that S1, the taper coefficient of a crystallizer is set to be 1.20%-1.40% for positive peritectic steel with the carbon content being 0.08%-0.12%, S2, in the pouring process, the heat flux density of a wide face and the heat flux density of a narrow face are calculated based on the flow of cooling water of the wide face and the narrow face of the crystallizer and the water inlet and outlet temperature difference, and the ratio of the heat flux density to the heat flux density is controlled to be maintained to be 0.8-0.9; s3, the cast slab meeting the taper and the heat flux ratio is subjected to release rolling, the method for solving the slab narrow face transverse crack defect and the application mainly aim to overcome the defects that in the prior art, due to the fact that the defect is high in concealment and difficult to detect, the slab with the defect often flows into the rolling procedure and develops into a hot-rolled coil broken edge, and the defect cannot be detected easily. And the problems that the yield is reduced, the grinding cost is increased, and the hot charging rate is reduced are solved.

The invention provides a crystallizer narrow-face copper plate for improving casting blank quality, which relates to the technical field of crystallizers and comprises a copper plate body, a plurality of vertical grooves are arranged on the back of the copper plate body, a flat cooling cavity extending transversely is arranged at the top of the back of the copper plate body, the depth of the flat cooling cavity is larger than that of the vertical grooves, and the bottom of the flat cooling cavity is communicated with the upper ends of the vertical grooves. A step is arranged on the side wall of the flat cooling cavity and is covered and sealed by a pressing plate to form an independent sealed cooling groove; the pressing plate is provided with a notch corresponding to the top of the cavity to form a water outlet channel, and the edge of the pressing plate is further provided with a concave sealing groove with a sealing strip. Cooling water enters from the narrow-face water tank, flows through the vertical groove from bottom to top, then is converged into the flat cooling cavity to be mixed and equalized in pressure, and then flows out from the water outlet channel to form inverted-T-shaped circulation. The independent pressure equalizing buffer cavity is formed in the top of the copper plate, so that the cooling uniformity of a meniscus area is remarkably improved, uniform formation of an initial blank shell is effectively promoted, cracks on the surface of a casting blank are reduced, and the product quality and the production stability are improved.

The utility model discloses a narrow-face control arm precise bidirectional trimming tool which comprises an upper die and a lower die which are matched with each other, the lower die comprises a lower supporting block used for supporting the trimming position of a workpiece, a left cutter and a right cutter, the left cutter and the right cutter can be close to each other, and the upper die comprises a left drive and a right drive. The left drive and the right drive are matched with the left cutter and the right cutter correspondingly and used for driving the left cutter and the right cutter to get close to each other to achieve edge cutting of a workpiece. The upper surface of the lower supporting block is provided with a curved surface consistent with the lower surface of a workpiece in a profiling mode, and the left drive and the right drive are wedge-shaped pieces respectively. The precise bidirectional trimming tool for the narrow-face control arm comprises a left cutter and a right cutter which can be close to each other, and the two sides of a workpiece can be trimmed at the same time through the mutual approaching of the left cutter and the right cutter.

The utility model discloses a vertical lathe narrow face large workpiece clamping auxiliary tool in the technical field of workpiece lathe machining, which comprises a base, a fastening structure is arranged at one end of the base, a supporting structure is arranged at the other end of the base, and the fastening structure is matched with a locking groove arranged on a working platform. The lower portion of the fastening structure is inserted into the locking groove, the base is located on the working platform, the base is locked and fixed to the working platform through the fastening structure after the base moves to a designated position along the locking groove, and then the supporting structure can abut against the narrow face of the bottom of a workpiece and is matched with the clamping mechanism to clamp and fix the workpiece. And the narrow surface of the bottom of the workpiece can be supported and cannot exceed the range, so that contact with a turning tool is avoided, and the safety is high.

This invention belongs to the field of steel production technology and discloses an effective production method for controlling edge defects in hot-rolled high-strength steel. The process includes converter smelting → LF refining → continuous casting → soaking furnace heating → hot continuous rolling → cooling and coiling. Specifically: the LF refining process controls the nitrogen content in the molten steel to be ≤40ppm at the end point; the continuous casting uses a funnel-shaped crystallizer with a taper ratio of 1.1%~1.3%, and the narrow face taper is adjusted during casting to maintain the heat flux density of the narrow face at 55%~85% of the heat flux density of the wide face; the secondary cooling intensity is controlled to ensure that the corner temperature of the billet is >900℃ in the straightening zone; the soaking furnace heating temperature is ≥1150℃, and the time in the furnace is ≥30min; in the vertical roll fixed-width side pressing pass of hot continuous rolling, the rolling force of the vertical roll mill is controlled to be >300kN. This invention significantly reduces the incidence of edge quality defects such as edge cracks, burrs, and broken edges in high-manganese and high-titanium series high-strength steel by optimizing the steel composition, continuous casting, and hot rolling processes.

The utility model discloses a spiral duct convenient to install, which relates to the technical field of ventilation duct connection and comprises a spiral duct body, and an internal connection structure and an external connection structure are respectively arranged at two ends of the spiral duct body. The internal connection structure comprises a limiting rod and an arc-shaped sealing strip, the external connection structure is provided with a limiting groove and a wedging groove which are matched, and rapid butt joint is achieved through a hasp structure. The sealing structure comprises an air guide ring, an annular air bag and a one-way valve, and the contact pressure between the sealing ring and the narrow face end is dynamically controlled by adjusting the air pressure of the air bag to adapt to environment temperature changes. By means of the design, the problems that a traditional air pipe is complex in installation and nonadjustable in sealing are solved, and the advantages of efficient butt joint, double sealing and pressure self-adaption are achieved.

This invention discloses a high-manganese steel production apparatus for improving the quality of high-manganese steel, belonging to the field of steel production technology. The apparatus includes a casting furnace and a casting pipe. A pipe seat that mates with the casting pipe is provided at the casting furnace. The casting pipe is inclined downwards at an angle f. In this high-manganese steel production apparatus, the casting pipe is inclined downwards at an angle of 12°, compared to the previous 15° angle. This shortens the distance between the steel stream and the narrow copper plate of the crystallizer, and places it higher up. The time for the stream to reach the meniscus is shortened, and the steel flow is increased. The stream exiting the nozzle experiences a smaller temperature drop as it flows upwards to the meniscus after hitting the narrow face. This maintains a higher superheat at the meniscus, which is beneficial for promoting the stability of the slag layer, uniform heat transfer, and improving the surface quality of the slab. It also reduces the probability of adhesion and longitudinal cracks.

This invention belongs to the field of steelmaking continuous casting technology, and relates to an online diagnostic method for the crystallizer of a slab continuous casting machine. The method involves inspecting and measuring the crystallizer body during the casting interval. The diagnostic criteria are as follows: the corner gap of the crystallizer copper plate ≤ 0.3mm; the absolute value of the difference between the length of one side of the inner and outer arcs of the crystallizer copper plate and the standard length of one side of the inner and outer arcs of the crystallizer copper plate ≤ 1mm; the absolute value of the relative thickness difference between the inner and outer arcs and the left and right sides of the crystallizer copper plate ≤ 3mm; the wear value of the narrow face of the crystallizer copper plate ≤ 1mm; the straightness of the crystallizer copper plate ≤ 0.5mm; within 450mm of the top edge along the length direction of the crystallizer copper plate, each crack or scratch must be ≤ 3.0mm wide, ≤ 10mm long, and ≤ 0.5mm deep, with a number of cracks or scratches ≤ 2; outside this area, each crack or scratch must be ≤ 3.0mm wide, ≤ 50mm long, and ≤ 0.5mm deep, with a number of cracks or scratches ≤ 2; and the area of ​​plating cracks at the meniscus ≤ 30×30mm. 2 If the area of ​​coating peeling off at the meniscus is 0, it meets the diagnostic criteria and is considered qualified; otherwise, it is considered unqualified.

The invention relates to a method for calculating and controlling the taper of a continuous casting slab widening and chamfering crystallizer, and belongs to the technical field of metallurgical continuous casting methods. According to the technical scheme, the arc length of the chamfering crystallizer is calculated; calculating the side length of the chamfering crystallizer; calculating the own taper of the narrow side of the crystallizer according to the arc length and the side length of the chamfering crystallizer; controlling and optimizing the narrow-surface guide device of the crystallizer; the taper of the narrow-face chamfering copper plate is set to be 1.3-3.0%, and the taper deviation range is smaller than or equal to 0.5 mm. The method has the beneficial effects that through taper calculation and stable control of the continuous casting slab widening and chamfering crystallizer, the process quality requirement for the taper precision of the narrow face of the crystallizer is well guaranteed, the phenomenon that the taper of the crystallizer exceeds the standard in the continuous casting process is effectively avoided, and production and quality hidden dangers in the continuous casting process are eliminated.

The invention relates to a method for the narrow-face covering of a panel element (1), in particular a furniture panel, wood material panels, worktops, chipboards, lightweight building panels, interior finishing panels, doors, fiber cement panels or the like, - wherein the narrow-surface covering is accomplished using edge-banding profiled elements (2) which have a base layer (3) made of B material, for example recycled material, characterized - in that the edge-banding profiled elements (2) have a width (B3, B4) which is smaller than the thickness D of the panel element (1), - in that at least one edge-banding profiled element (2) is first fastened to at least one of the narrow faces (15) in such a way that the panel element (1) protrudes at least on one side, such that at least one recess (7, 8) preferably of corner-shaped cross-section is formed, and - in that, thereafter or at the same time, the recess (7) or the recesses (7, 8) are filled, along the border of the panel element (1), with a second, preferably polymeric A material (A), preferably by means of a melting method. The invention also relates to a panel element produced by said method.

The invention discloses a narrow-face foot roller which comprises a middle section and conical sections symmetrically connected to the two ends of the middle section. The conical section is of a variable-diameter structure, the large-diameter end of the conical section is connected with the middle section, and a roller shaft is arranged at the small-diameter end of the conical section. The radius of the middle section is 3-5 mm larger than the radius of the small-caliber end of the cone section. The length of the middle section is 1 / 4-1 / 3 of the total length of the narrow-face foot roller. The invention further discloses a crystallizer device which comprises a wide-face copper plate, a narrow-face copper plate, a wide-face foot roller, a narrow-face foot roller and a cooling nozzle assembly. The invention further discloses a casting blank sinking control method. The narrow-face foot roller has the beneficial effects that the narrow-face foot roller adopts the drum-shaped design that the middle part is wider than the side part, the uppermost first pair of narrow-face foot rollers can directly form an initial groove in a narrow-face blank shell of a casting blank, each pair of follow-up foot rollers tighten an angle towards the center of the wide face in the running direction of the casting blank, and the narrow-face foot rollers are pressed down gradually, so that the narrow-face foot rollers are prevented from being damaged. And the total depth of the groove is controlled after the casting blank is discharged from the foot roller section.

The present invention relates to a method for coating the narrow face of a panel element, in particular of a furniture panel, wood material panel, worktop, chipboard, lightweight building panel, interior finishing panel, door, fiber cement panel or the like, wherein the coating of the narrow face is carried out by means of edge strip elements, the method being characterized in that: - firstly at least one edge strip element is fastened to at least one narrow face; - the panel element and the edge strip element are subjected to material-removing machining at least at one margin of said narrow face, so as to form at least one recess; - in the course of this material-removing machining, at least one long marginal side of the edge strip element fastened to said narrow face is at least partially removed; - the recess along the margin of the panel element is subsequently filled with a preferably polymeric material, preferably by means of a melting process; - such that said margin of the panel element can be shaped independently of the thickness of the edge strip element. The invention also relates to a panel element, in particular a furniture panel, worktop, chipboard, lightweight building panel, interior finishing panel, door, fiber cement panel or the like, having a thickness D and comprising at least one edge strip element which has, for example, a width B2 of 10 to 120 mm, preferably 15 to 100 mm.

The utility model discloses a tool for auxiliary measurement of composite profile surface film thickness, which comprises a test tool, a film thickness tester and a profile, the bottom of the test tool is provided with a groove matched with the profile, and the film thickness tester is placed on the test tool; a long groove is formed in the middle of the testing tool, the width of the long groove is larger than that of the probe, and the probe of the film thickness tester is located between the long grooves; the top of the testing tool is arranged to be in a concave shape, limiting grooves are formed in the positions, located on the two sides of the long groove, of the testing tool, the width of the limiting grooves is larger than that of idler wheels on a film thickness tester, a plurality of anti-slip strips are fixed to the limiting grooves, and the problem that the narrow face of a profile is inconvenient to detect is solved through the device.

This invention discloses a method for rapid preparation of a thin slab continuous casting machine, comprising: sequentially stacking consumable parts, steel plates, and shear plates and binding them with tape to form a consumable parts assembly; assembling iron sheets to form a cold material iron sheet assembly with the same dimensions as the wide face of the crystallizer; after the dummy bar is inserted into place, installing the entire consumable parts assembly on the head of the dummy bar, keeping it centered and tightening the bolts; after the consumable parts assembly is installed, placing asbestos strips on the two long sides of the consumable parts assembly and fixing them with tape; after fixing the asbestos strips, opening the crystallizer and pulling down the dummy bar, closing the crystallizer and clamping it to compact the asbestos strips between the wide face of the crystallizer and the consumable parts; after the asbestos strips are clamped and sealed, sealing the gap between the consumable parts and the narrow face of the crystallizer with asbestos, and stacking the combined cold material on top; after the cold material is placed on the narrow face of the crystallizer, sequentially stacking the cold material iron sheet assembly between the width of the crystallizer and the cooling claw of the consumable parts, preparing for subsequent casting.