37results about How to "Guaranteed molding size" patented technology

The invention discloses a preparing method of a TC4 alloy large-scale special-shaped cross section annular blank. The preparing method comprises the steps that a GH4169 alloy bar is heated to be 30 DEG C below the phase transformation point in a certain heating mode, and is then subjected to upsetting, punching and rolling to become a rectangular cross section annular blank; then, the rectangular cross section annular blank is expanded into a primary special-shaped cross section annular blank at the pressure of 32 to 34MN; next, the primary special-shaped cross section annular blank is expanded into a secondary special-shaped cross section annular blank at the pressure being 30 to 32 MN; then, the upper end of the secondary special-shaped cross section annular blank higher than a loose tooling is subjected to free upsetting to be flush with the loose tooling at the pressure of 20 to 24MN, and the final special-shaped cross section annular blank is obtained. The method has the advantages that the forming pressure required by the blank manufacturing can be effectively reduced, meanwhile, the flow direction of process excess materials can be effectively controlled, and the forming dimension of an intermediate blank is ensured. The method is applicable to the preparation of the intermediate blank of a large-scale special-shaped cross section annular blank element.

The invention discloses a method for automatically monitoring welding contraction deformation of a steel structure. An inventor conducts theoretical deviation through a displacement sensor to obtain contraction deformation computational formulas seen from formula (1) to formula (6) and sets up the automatic monitoring method according to the formulas. The method is simple in device, easy to operate, high in automation degree, free of manual interference and capable of lowering the labor intensity of people. Contraction deformation values in two perpendicular directions and a total contraction deformation value can be displayed in real time, and real-time grasping of stability and quality of the welding technology can be facilitated. The monitoring result is higher in accuracy compared with the monitoring result obtained through a conventional method, and the accuracy can reach 0.01mm. When the method is applied to the steel structure welding field, the contraction deformation can be accurately, automatically and dynamically monitored in real time, reliability and stability of the welding technology can be conveniently distinguished, and the requirements of the steel structure for the forming size, the appearance and the bearing capacity are beneficially met.

The invention discloses a prefabricated retaining wall and a pile hole excavation method. The excavation method comprises the steps that first, guide-hole construction is carried out by using a machinery in an excavation area of a rectangular hole, after the internal opening is carried out, a soil body at the edges and corners of the rectangular hole is disturbed, internal stress is released, thedifficulty of subsequent excavation is greatly reduced, moreover, with the continuous increase of gravity of the prefabricated retaining wall, the settlement process of the prefabricated retaining wall is easier, and construction efficiency is conducive to be improved; and according to the excavation method, excavation of the rectangular hole can be carried out effectively, construction safety isimproved, construction difficulty is reduced, the requirement for forming a large-size rectangular hole is met, at the same time, prefabricated retaining wall structure is effectively installed to avoid the risk of hole collapse, hole digging and the retaining wall can be completed simultaneously, the construction period is conducive to be shortened, energy saving and environment production are achieved, the quality hidden danger of the retaining wall can be avoided effectively, and the excavation method is especially suitable for construction of an anti-slide pile in cold and high altitude areas such as the sichuan-tibet line.

The invention belongs to the technical field of sheet metal processing, in particular to a bending forming method for sheet metal parts. The bending forming method adopts a multi-roller floating bending machine. The multi-roller floating bending machine comprises a machine body, a downward pressing module, a main pressure head, auxiliary pressure heads, an adjusting unit, movable dies and a fixeddie, wherein a controller is arranged on the machine body. The controller is located at one side of the machine body. The downward pressing module is located at the upper part of the machine body andis used to press down the main pressure head and the auxiliary pressure heads. The main pressure head is fixedly connected with the downward pressing module. The auxiliary pressure heads are of the same structure as the main pressure head, and the auxiliary pressure heads and the main pressure head are used for bending the sheet metal parts. The adjusting unit is positioned between the auxiliary pressure heads and the downward pressing module and is used for adjusting the auxiliary pressure heads to ascend or move left and right. The movable dies are located at one side of the lower part of the machine body and is in sliding connection with the machine body. The movable dies are used for bending the sheet metal parts. According to the bending forming method, the forming size of the sheet metal parts can be ensured by fine-adjusting the shapes of the sheet metal parts, and the forming qualification rate of the sheet metal parts is increased.

The invention discloses a preparing method of a G10CrNi3Mo bearing steel large-scale special-shaped cross section annular blank. The preparing method comprises the steps that a G10CrNi3Mo alloy bar is heated to be 1210+/-20 DEG C in a certain heating mode, and is then subjected to upsetting, punching and rolling to become a rectangular cross section annular blank; then, the rectangular cross section annular blank is expanded into a primary special-shaped cross section annular blank at the pressure of 23 to 26MN; next, the primary special-shaped cross section annular blank is expanded into a secondary special-shaped cross section annular blank at the pressure of 20 to 25MN; then, the upper end of the secondary special-shaped cross section annular blank higher than a loose tooling is subjected to free upsetting to be flush with the loose tooling at the pressure of 8 to 12MN, and the final special-shaped cross section annular blank is obtained. The method has the advantages that the forming pressure required by the blank manufacturing can be effectively reduced, meanwhile, the flow direction of process excess materials can be effectively controlled, and the forming dimension of an intermediate blank is ensured. The method is applicable to the preparation of the intermediate blank of a large-scale special-shaped cross section annular blank element.

The invention relates to a novel tooth-like sealing plate manufacture technology. Key dimensions including tooth-like sealing plates, tooth-like lines, tooth root depth, bent lines and the like all have big deviations, so that an assembling gap between the sealing plate and a tube panel is overlarge, since the production process of the tooth-like sealing plate is in cold working processing and the manufacture precision of cold working is low, forming is poor, and the factors cause the problem that two ends are jacked and tooth spaces are overlarge during assembling so as to be difficult in realizing seal welding. The novel tooth-like sealing plate manufacture technology utilizes computer software to carry out three-dimensional entity authentication analysis, draws the assembling position relationship of the sealing plate and the tube panel, determines the key dimensions of the tooth-like lines, the tooth root depth and the bent lines, utilizes the computer software to carry out three-dimensional entity authentication analysis through theoretical calculation, givens the key dimensions of the tooth-like lines, the tooth root depth and the bent lines of 10 tooth-like sealing plates again, and formulates a new technology by a new tool. The invention is used for the novel tooth-like sealing plate manufacture technology.

The invention discloses a forming process of a chromium-molybdenum-vanadium steel seamless taper pipe. The forming process is characterized by comprising the following steps: an alloy tool steel material is selected, and following alloy elements in percentage by mass are added to carbon tool steel: 1.4%-1.6% of C, less than or equal to 0.60% of Mn, less than or equal to 0.60% of Si, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 11.00%-13.00% of Cr, 0.70%-1.20% of Mo, less than or equal to 1.10% of V, and less than or equal to 1.00% of Co; and the hardness value HB of anequal-diameter straight pipe finished product material is less than or equal to 255. According to the forming process, taper pipe forming is conducted through a cold pressing type taper pipe formingdevice, and the pipe body change rate, the forming environment temperature and other technological means are kept; and the taper pipe is prevented from being formed in a material fatigue state in theforming process by controlling constant low temperature, cold pressing and compression ratio and designing roundness in a high-hardness state, so that not only are the forming sizes inside and outsidethe product ensured, but also the grains of the material inside the product are uniform and fine, and various good mechanical properties are achieved.

The invention discloses an expansion joint shaping mold device and a construction method. The device comprises upper formwork, lower formwork and a steel edge rubber water-stop belt between the upperformwork and the lower formwork. The lower formwork is a right-angled triangular rigid supporting system formed by a welding keel, a formwork face plate, a shear-resistant steel bar hole, an angle steel keel, an inclined strut A, a support and a steel pipe sleeve; the upper formwork is arranged above the lower formwork, the upper formwork and the lower formwork are folded, a face plate and a bottom plate of the upper formwork are fixed through a reserved movable shear-resistant steel bar reserved hole, and the upper formwork and the lower formwork are fixed by tightening tension screws; A U-shaped groove A and a steel edge rubber water-stop belt horizontal positioner are arranged on the angle steel keel of the lower formwork, a U-shaped groove B is formed in the bottom of the target face plate of the upper formwork, and a steel edge rubber water-stop belt is arranged between the U-shaped groove A and the U-shaped groove B. According to the device, shaping and geometric dimension of concrete can be effectively ensured, the position of the steel edge rubber water-stop belt is prevented from displacement, and the shaped expansion joint is smooth and straight and is not bent.

The invention relates to a self-positioning tool structure for assembling a loop network switchgear cubicle instrument box. The tool structure comprises a positioning bottom plate, a positioning coverplate, a positioning rear connecting plate, a left side plate and a right side plate; a positioning bolt is fixed on the positioning bottom plate, the positioning cover plate comprises a positioningfolding edge, the contact part among the left side plate, the right side plate and the positioning bottom plate is provided with an along edge, and a positioning hole is formed in the along edge; andduring installation, the positioning folding edge is folded into the inner frame of the left side plate and the inner frame of the right side plate, during installation, the positioning bolt on the positioning bottom plate is inserted into the positioning hole of the left side plate and the positioning hole of the right side plate, a bent covering edge is bent on the positioning bottom plate, during installation, the left side plate, the right side plate and the positioning rear connecting plate are installed on the inner side of the bent covering edge, during installation, the positioning bolt on the positioning bottom plate is inserted into the positioning hole of the left side plate and the positioning hole of the right side plate, positioning and connecting effects are achieved in thepositioning holes, the folding edge of the positioning cover plate is pressed into the left side plate and the right side plate of the instrument box to ensure the inner forming size of the box body,after the forming precision of the instrument box is guaranteed, the tool structure is disassembled, and after the instrument box is installed, disassembling is carried out.

The invention discloses a lower cone forming tool and method for an intervention nail pulling dual-taper bush. The forming tool comprises a feeding mechanism, a lower cone forming mechanism and an unloading mechanism; the automatic feeding mechanism comprises a workpiece (91), a material guiding groove (92) and a vibration material disc (93); the lower cone forming mechanism comprises an inner cavity molded surface pressure head (1) of the dual-taper bush, a blank (2) of the dual-taper bush, an outer molded surface interlayer cover (4) of the dual-taper bush, a guide cover (5) and a lower conefemale die (6); and the unloading mechanism is an unloading rod (7). According to the lower cone forming tool and method, a whole set of combined forming tool is designed, the size of a molding die cavity is precisely controlled, the match between sizes of the die and the workpiece is realized, the instability of the workpiece is limited by inner and outer molded surfaces of the die, a sectionalcombined die is adopted, the lower cone is formed in a forming manner of limiting and necking down, the formation of the lower cone of a 100-degree countersunk head or flat head thin-wall interventionbush is met, and the lower cone forming tool can be used for precisely controlling an intervention connection structure of a plane composite material with precise interference amount.

The invention relates to a pipe orifice mould-withdrawing tool for a container. The tool is composed of a mould-withdrawing barrel, a barrel pipe-withdrawing lower mould, a pipe-withdrawing upper mould, inner hexagonal screws, mould placing platforms, a hydraulic machine connecting screw rod, a mould-withdrawing seal head and a seal head pipe-withdrawing lower mould. The tool is suitable for pipe orifice mould-withdrawing mould forming production of sanitary grade equipment, and belongs to the technical field of an innovative process of manufacturing the sanitary grade equipment. A reasonable mould operating mode is as follows: a mould is driven hydraulically; a workpiece is placed on a hydraulic platform by a worker, upper and lower moulds are assembled, a hydraulic device is started, and a step of withdrawing the mould can be finished only by an operation of a single worker, so that the labor intensity of the worker is alleviated.

The invention discloses a cover plate mold for cancelling a phosphating process. The cover plate mold is mainly composed of an upper template, a compression spring, an upper baseplate, an upper mold core baseplate, fixing screws, an upper mold core, a fixing plate, an upper transmission piece pressure block, a mold frame, a limiting mechanism, a lower template, a discharging plate, a lower transmission piece pressure block, a lower mold core baseplate, a lower baseplate, a lower mold core, a locating block, a step structure mounting surface pressure block, a flanging pressure block, an upper mounting surface pressure block, a guide pillar and a guide sleeve. According to the cover plate mold, through regulation of the cover plate mold structure and a clearance, formation after phosphatingis not required; a cover plate is directly subjected to stretch forming, and destructive treatment to the surface is not required; the surface strength of the cover plate can be improved, and meanwhile the production efficiency is improved; and the production cost, labor intensity and environmental pollution are reduced.

The invention relates to a blow molding preparing method for a plastic film. A blow molding preparing device for the plastic film is used. The blow molding preparing device for the plastic film comprises a guide frame, an extruding machine, a guiding and fixing device, a traction device and a cutting device. The extruding machine is installed at the lower end of the interior of the guide frame. The guiding and fixing device is arranged above the extruding machine. The traction device is arranged on the right side of the guiding and fixing device. The cutting device is arranged between the traction device and the cutting device. By means of the blow molding preparing method for the plastic film, a multiple guiding and fixing design concept is adopted for conducting plastic film production,an adaptive guiding, clamping and fixing structure is adopted for the upper and the lower end of the initial-stage tubular plastic film, the forming size of the tubular plastic film and the completeness of the whole body of the plastic film are ensured, and the forming quality of the tubular plastic film is improved.