31results about How to "Efficient trimming" patented technology

The invention provides a method for roughly trimming a diamond grinding wheel. The method includes steps of A, scanning the surface of the diamond grinding wheel, acquiring the highest point of the surface of the grinding wheel and determining the position of the highest point in radial, axial and generating line directions; B, emitting a focused pulse laser beam along the inner normal direction of the surface of the grinding wheel and enabling the position of a focal spot of the focused pulse laser beam to be coincided with the position of the highest point of the grinding wheel in the radial, axial and generating line directions; C, erecting a silicon carbide roller at a position opposite to a generating line of the grinding wheel and setting the cutting depth as 0.005mm; and D, repeating the steps once after the grinding wheel is trimmed for 3 to 5 minutes until a circle run-out error of the grinding wheel is not larger than 20 micrometers. The method has the advantages that diamond grains are ablated and directly removed by the focused pulse laser beam, remaining diamond grains are removed by the silicon carbide roller, deteriorative layers of surfaces of the grains which are ablated by laser, grains without holding force and the like are mechanically peeled off, and the method is applicable to efficiently roughly trimming diamond grinding wheels with large grains.

An outer blade cutting wheel (1) comprising a base and a blade section (11) of metal or alloy-bonded abrasive grains is dressed by clamping the cutting wheel between a pair of circular jigs (2) such that the blade section (11) projects beyond the jigs, immersing the cutting wheel in an electropolishing liquid, positioning counter electrodes (4, 5, 6) relative to the blade section, and effecting electropolishing for thereby removing part of the metal or alloy bond and chips received in chip pockets until abrasive grains are exposed on the blade section surface.

To make it possible to decide a trimming area correctly and quickly. The trimming area is set up by using a facial frame. The facial frame is decided by using values, L1a, L1b, and L1c which are obtained by performing an operation following a formula (44) for distances D1 between both pupils in a facial picture image for, as breadth of facial frame in which a center position Pm between both eyes is set as a lateral center, a distance from the center position Pm to an upper end of the facial frame, and a distance from the center position Pm to lower end of the facial frame, respectively. Here, the formula (44) is L1a=D*3.250; L1b=D*1.905; L1c=D*2.170.

The invention discloses a CBN valve fine grinding conical surface grinding machine, which comprises a machine tool body; a machine tool protective cover is fixedly connected to the upper end of the machine tool body; a left-right moving door is movably connected to the front end of the machine tool protective cover; a feeding port is formed in the left end of the machine tool protective cover, and a discharging port is formed in the right end of the machine tool protective cover; the front end of the machine tool protective cover is fixedly connected with an operation control box, and the operation control box is located on the outer side of the left-right sliding door; the right end of the machine tool protective cover is fixedly connected with an electric control cabinet, and the electric control cabinet is electrically connected with the machine tool body and the operation control box; the outer side of the machine tool body is detachably connected with a cooling grinding fluid water tank; and universal trundles are fixedly installed at the lower end of the cooling grinding fluid water tank. According to the CBN valve accurate grinding conical surface grinding machine provided by the invention, overall rapid and stable clamping is guaranteed, the overall clamping stability is improved, overall trimming is facilitated, and therefore the overall good using effect is guaranteed.

The invention provides an ultrahard abrasive grinding wheel compounded efficient and precise finishing method. The method comprises the following steps: (1) abrasive water jet rough finishing: abrasive water jet is sprayed to a direction with a certain angle; meanwhile, an abrasive water jet nozzle performs a reciprocating motion along a section profile trajectory of a molded surface needed by a grinding wheel; and an ultrahard abrasive grinding wheel is radially fed to realize rough finishing; (2) a finishing roller and a free abrasive are used for extrusion and finishing; abrasive water jetspray heads are arranged in a row; and the jet flow of each spray head is controlled to match with a finishing roller for finishing; and (3) the abrasive water jet is used for finishing sharpness. Theultrahard abrasive grinding wheel compounded efficient and precise finishing method is simple in process, high in finishing precision and suitable for the finishing work of ultrahard abrasive grinding wheels with complex molded surfaces.

The invention discloses an edge-cutting device for a non-woven fabric production and facilitating position adjustment. The edge-cutting device comprises a main body rack, a supporting plate, a driverand a loop bar. A heating box is mounted in the main body rack, a storage box is arranged on the right side of the heating box, a heating wire is connected above the heating box, a paving plate is mounted at the top end of the heating wire, a fixed plate is arranged at the tail end of a scroll bar, a first spring is arranged on the front side of the fixed plate, a limiting block is mounted at thetail end of the first spring, a ball bearing is arranged on the inner side of the limiting block, the loop bar is mounted on the left side of the scroll bar, a second spring is arranged in the loop bar, the top end of the second spring is connected to a connecting rod, and a leaning plate is fixed to the top end of the connecting rod. The edge-cutting device for the non-woven fabric production andfacilitating position adjustment can adjust the positions of slicers, and adopts multiple groups of slicers to cut the edges efficiently conveniently, the non-woven fabric convenient to roll, and thenon-woven fabric can be stored and used conveniently in later period.

The invention relates to a diamond grinding wheel dressing method, and belongs to the technical field of grinding apparatuses. The diamond grinding wheel dressing method comprises the following stepsthat an electroplating diamond grinding wheel and a diamond grinding wheel to be dressed are relatively ground, then the relatively ground grinding wheel to be dressed is subjected to surface cleaning, and the diamond grinding wheel is obtained. According to the diamond grinding wheel dressing method, the diamond grinding wheel and the diamond grinding wheel are relatively ground, the diamond grinding wheel is dressed, and the problem that when a silicon carbide grinding wheel is used for dressing the diamond grinding wheel in the prior art, the silicon carbide grinding wheel is consumed too fast is avoided. Meanwhile, the diamond grinding wheel is adopted as the dressing grinding wheel, the shape retention performance is good, profile modeling dressing can be adopted for the diamond grinding wheel as the grinding wheel to be dressed, and the dressing precision of the diamond grinding wheel is improved.

The invention pertains to an aqueous coating composition comprising: an aqueous latex of a copolymer consisting essentially of recurring units derived (i) from vinylidene chloride (VDC), (ii) from vinyl chloride (VC), (iii) from one or more than one alkyl (meth)acrylate having from 1 to 12 carbon atoms in the alkyl group [monomer (MA)] and (iv) from one or more than one aliphatic alpha-beta unsaturated carboxylic acids [monomer (AA)], the proportion of recurring units derived from monomer (AA) being of at least 1.0 wt %, with respect to the total weight of the copolymer [copolymer (A)], wherein: (A) the said copolymer (A) is stable against dehydrochlorination, in a manner such that the total chloride content of the solid residue of the aqueous latex, after thermal treatment at about 120 DEG C for 2 hours, is of less than 1000 ppm, with respect to the total weight of the copolymer (A); (B) the said copolymer (A) does not to undergo any significant crystallization upon heating, in a manner such that the ratio of (j) its crystallinity index (CI) after a thermal treatment involving heating at 60 DEG C for 48 hours to (jj) its crystallinity index before such thermal treatment (Clafter thermal treatment / CI before thermal treatment) is less than 1.15; and at least one anti-corrosion pigment comprising an aluminium salt of a (poly)phosphoric acid modified with an alkaline earth metal oxide [pigment (P)]; at least one non-ionic surfactant [surfactant (NS)]; and at least one inorganic filler [filler (I)] different from pigment (P), in an amount such that the overall pigment volume concentration (PVC), comprehensive of pigment (P) and filler (I), is comprised from 20 to 40 % vol., when determined with respect to the dried coating composition.

The invention discloses a high-efficiency and precise on-site dressing method and device for a cup-shaped arc grinding wheel, which realizes high-efficiency and precise on-site dressing and sharpening of a cup-shaped arc grinding wheel, and integrates a three-axis linkage numerical control machine tool and a single-rotation axis grinding wheel dresser organically. Combined for cup-shaped arc grinding wheel dressing, the X linear axis and Z linear axis of the machine tool are controlled by the machine tool CNC system to perform circular arc envelope interpolation, which can realize efficient and high-precision in-situ dressing of cup-shaped grinding wheels with any wrap angle arc, At the same time, the uniform feed movement of the Y linear axis can be controlled, which can ensure the flatness of the peripheral surface of the plane dressing wheel, avoid the sharp increase of the removal amount when the cup-shaped arc grinding wheel is dressed directly above the plane dressing wheel, and ensure the dressing of the cup-shaped arc grinding wheel precision.

A device for repairing grinding wheel wear, including a device main body, a left and right sliding chamber is provided at the lower end of the device main body, a large threaded rod is rotatably provided between the left and right walls of the left and right sliding chamber, and the outer circle of the large threaded rod The surface thread is connected with left and right sliding blocks that can slide left and right relative to the inner walls of the left and right sliding chambers. Small threaded rod, the left and right ends of the small threaded rod are threadedly connected with large sliders that can slide left and right relative to the inner wall of the small threaded rod, the upper ends of the large sliders on both sides are hinged to support rods, and the inner walls of the upper and lower sliding chambers The upper end can slide up and down with up and down sliding blocks. The invention realizes the up and down and left and right movement of the repair pin through three different modes of the orbital motor, so that the worn grinding wheel can be trimmed efficiently, improving the utilization rate of resources, reducing loss.

The invention provides a cutting apparatus, a tray and a transport system. The cutting apparatus can efficiently assemble and disassemble a board relative to a sub-chuck table. A cutting apparatus includes a chuck table having a holding surface used for holding either a workpiece unit that includes a plate-shaped workpiece supported on an annular frame by a tape or a tray shaped similarly to the annular frame, a rest area used for placing a receptacle that houses the workpiece unit or the tray, a transport unit configured to transport the workpiece unit or the tray between the rest area and the chuck table, the transport unit having a holding pad that holds the workpiece unit or the tray, a sub-chuck table that is disposed sideways of the chuck table and has a holding surface used for holding a board for use in adjusting a cutting unit, and a board transport unit configured to transport the board between the tray held on the chuck table and the sub-chuck table.

The invention discloses a grinding wheel dressing machine tool and a grinding wheel dressing method thereof. The grinding wheel dressing machine tool comprises a machine tool body. A dressing grinding wheel assembly, a dressed grinding wheel assembly, an optical measuring frame and a cantilever type console are mounted on the machine tool body. The dressing grinding wheel assembly comprises a rotary fixing seat arranged on the machine tool body, a rotary tray is arranged at the top of the rotary fixing seat, a dressing grinding wheel feeding mechanism is arranged on the rotary tray, and a dressing grinding wheel motor spindle mechanism and a reciprocating mechanism are arranged on the dressing grinding wheel feeding mechanism. The dressed grinding wheel assembly comprises a fixing seat arranged on the machine tool body, and a cross-shaped feeding mechanism and a dressed grinding wheel motor spindle mechanism are arranged at the top of the fixing seat. According to the grinding wheel dressing machine tool and the grinding wheel dressing method thereof, the principle that the rotating speed of a dressed grinding wheel is different from the rotating speed of a dressing grinding wheel, and the grinding wheels are different in particle size and hardness is adopted for achieving shape dressing and sharpening of the dressed grinding wheel, diamond grinding wheels and CBN grinding wheels can be dressed easily and efficiently, and the grinding wheel dressing machine tool has the characteristics of easy operation, high dressing precision, stable structure and the like.

The invention provides a method for roughly trimming a diamond grinding wheel. The method includes steps of A, scanning the surface of the diamond grinding wheel, acquiring the highest point of the surface of the grinding wheel and determining the position of the highest point in radial, axial and generating line directions; B, emitting a focused pulse laser beam along the inner normal direction of the surface of the grinding wheel and enabling the position of a focal spot of the focused pulse laser beam to be coincided with the position of the highest point of the grinding wheel in the radial, axial and generating line directions; C, erecting a silicon carbide roller at a position opposite to a generating line of the grinding wheel and setting the cutting depth as 0.005mm; and D, repeating the steps once after the grinding wheel is trimmed for 3 to 5 minutes until a circle run-out error of the grinding wheel is not larger than 20 micrometers. The method has the advantages that diamond grains are ablated and directly removed by the focused pulse laser beam, remaining diamond grains are removed by the silicon carbide roller, deteriorative layers of surfaces of the grains which are ablated by laser, grains without holding force and the like are mechanically peeled off, and the method is applicable to efficiently roughly trimming diamond grinding wheels with large grains.

The invention belongs to the technical field of dressing of superhard grinding wheels, and in particular relates to an optical curve grinding wheel for dressing superhard material chamfering grinding wheels of metal bond; it includes a base body and an abrasive layer, and the abrasive layer includes the following raw materials in parts by weight: abrasive 30-40 parts, and 60-70 parts of metal bonding agent; the metal bonding agent is composed of the following raw materials in parts by weight: 30-55 parts of copper powder, 25-50 parts of tin powder, and 5-10 parts of silver powder. The grinding wheel formula and processing technology of the invention are simple, and the operation is simple and convenient; the metal bond superhard material chamfering grinding wheel can be trimmed, the processing effect is good, and the micro groove size of the chamfering grinding wheel can reach the accuracy of plus or minus 0.01mm.

The invention provides a dressing unit for dressing a grinding wheel which is used for processing a workpiece. The dressing unit comprises a rack, a first driving part and a second driving part, wherein the first driving part is arranged on the rack and comprises a first rotating shaft; a first dressing wheel can be mounted on the first rotating shaft; the first driving part is numerically controlled to drive the first rotating shaft to rotate at a first preset rotating speed in order to dress the grinding wheel while the first dressing wheel is combined with the grinding wheel; the second driving part is arranged on the rack and comprises a second rotating shaft; a second dressing wheel is mounted on the second rotating shaft; and the second driving part is numerically controlled to drivethe second rotating shaft to rotate at a second preset rotating speed in order to dress the first dressing wheel while the second dressing wheel is combined with the first dressing wheel. The invention also provides a numerical control processing device.

The invention relates to a superhard abrasive dressing tool, which is made of the following raw materials in mass percentage: 30-55% of ordinary abrasive, 10-35% of PTFE powder, 20-40% of resin powder, and 5-5% of modified filler 34%, reinforced fiber material 5‑10%, coupling agent 1‑6%. The dressing tool of the present invention has a wide range of applications, high efficiency and low cost, and can be applied to dressing of diamond and CBN grinding wheels with a particle size of 45# to 20000# for various hardness binders; the dressing efficiency is lower than 3-10min, and the dressing effect is excellent. Can reach 1cm 2 The sharpness rate of abrasives on the plane is above 98%.

The invention relates to a high-precision balanced-type sapphire double-surface grinding machine. The machine comprises a bottom frame (12), a gantry column (1), a lower plate system (13) and an upper plate system (10). The upper plate system and the lower plate system are arranged on a spindle shaft (6) in a sleeving mode and capable of rotating coaxially. A balanced-type upper-plate device sleeved on the spindle shaft is arranged above the upper plate system. A planetary gear decelerator (5) downwardly extending along an output shaft is arranged on a crossbeam of the gantry column. A gear of the planetary gear decelerator at the lower end of the output shaft is engaged with a gear (11) arranged at the lower part of the spindle shaft in a sleeving mode. One side of the crossbeam of the gantry column is provided with a transverse lead screw (16) and a pair of linear sliding rails (12). The lead screw is equipped with a nut seat which is firmly connected with a sliding saddle (15) horizontally sliding along a linear sliding rail. The outside of the crossbeam is provided with a servo motor (18). An output shaft of the servo motor is connected with the lead screw. The lower end of the sliding saddle is connected with a transverse knife rod (19). The front end of the transverse knife rod is provided with a knife chuck (20) and upper and lower knives (14). The high-precision balanced-type sapphire double-surface grinding machine is simple in structure, reliable in performance and easy in operation and control.

A gear tooth surface processing device and a gear manufacturing method are provided which are capable of adjusting processing pressure for the purpose of improving the surface roughness of high-hardness gears and the like. The gear tooth processing device (10) has: a helical grindstone (2); a position adjusting means (3) which is capable of moving the relative positions of a rotary axis (C) of the helical grindstone (2) and a rotary axis (X) of a gear to be processed (W); and a control means (7). The control means (7) includes: a position control unit (71) which operates the position adjusting means (3) so as to adjust the relative positions of the rotary axis (C) of the helical grindstone (2) and the rotary axis (X) of the gear to be processed (W) to cause only one of the tooth surfaces to be processed (11), from among the gear tooth surfaces that form a single tooth of the gear to be processed (W), to make contact with a grindstone tooth surface (21) of the helical grindstone (2) such that the helical grindstone (2) and the gear to be processed (W) are engaged; a grindstone rotation means control unit (72) for operating a grindstone rotation means (4); and a torque control means control unit (73) for operating a rotation torque control means (5) so as to adjust the rotation torque within a predetermined range.

The invention discloses a novel efficient numerical control gear grinding machine which comprises a machine frame, a left-right workbench, a front-rear workbench, a Z-axis sliding mechanism, a C-axis workpiece clamping and holding mechanism, an X-axis sliding mechanism, a B-axis rotating mechanism, a V-axis trimming mechanism, a U-axis trimming mechanism and a grinding head mechanism. The left-right workbench is horizontally arranged at the front portion of the machine frame; the C-axis workpiece clamping and holding mechanism is arranged on the left-right workbench; the front-rear workbench is longitudinally arranged at the tail portion of the machine frame; the grinding head mechanism is arranged on the front-rear workbench. The novel efficient numerical control gear grinding machine is ingenious and reasonable in design, easy to operate, multifunctional, capable of grinding ordinary spur gears, bevel gears, screw rods, worms and ring surface worms efficiently, multipurpose and wide in application range, has the function of trimming grinding heads, can efficiently trim the grinding heads of any contour, greatly improves rigidity of the grinding heads, effectively improves machining accuracy, and is simple in overall structure, easy to manufacture and produce, and beneficial to being popularized and applied widely.