33 results about "Back cutting" patented technology

The invention relates to the technical field of milling cutters, in particular to a multi-tooth micro-blade milling cutter and a manufacturing method and application thereof. The multi-tooth micro-blade milling cutter comprises a cutter handle and a cutter head body, wherein the cutter head body is fixedly connected to one end of the cutter handle; the multiple cutter teeth are arranged on the outer side face of the cutter head body, and each cutter tooth extends to the tail end, close to the cutter handle, of the cutter head body from the top end, away from the cutter handle, of the cutter head body; each cutter tooth comprises a front cutter face, a rear cutter face and a cutting edge, the cutting edge is provided with a plurality of continuously-distributed micron-sized protruding micro-blades, the micro-blades form an arc-shaped sawtooth structure, the micro-blades extend to the front cutter faces and form micro grooves in the front cutter faces, the micro-blades extend to the front cutter faces and form micro grooves in the front cutter faces, and the micro-blades extend to the rear cutter faces and form micro grooves in the front cutter faces. The multi-tooth micro-blade milling cutter has the structure of the front angle of the front cutter face of the milling cutter tooth and the rear angle of the rear cutter face of the milling cutter tooth, the linear cutting blade of the traditional cutter tooth is dispersed into micro blades, the stress concentration of the cutter is reduced, a plurality of convex micro blades are in grinding motion on the machining face in the milling process, and the milling and grinding combined machining effect is formed. Unification of machining efficiency and machining precision is achieved.

A blade body is of a hexagonal prism structure and is provided with an upper end face, a lower end face, two sets of side positioning faces, two sets of rear tool faces and two sets of auxiliary faces, the side positioning faces, the rear tool faces and the auxiliary faces are oppositely arranged in pairs, a main cutting edge is formed at the intersection position of the upper end face and each rear tool face, and each main cutting edge is connected with a fillet tool nose. A chip groove is formed in the upper end face. The cutter is sharp in cutting edge, light and fast in cutting, small in depth of penetration, large in feed amount, thin in cuttings, high in cutting efficiency, capable of rapidly guiding and breaking the cuttings, long in service life, convenient and fast to replace and particularly suitable for milling materials difficult to machine, and the production of cutting heat is reduced due to the high feed amount. The milling cutter can well replace a traditional integral alloy milling cutter to be used for fast and efficient bottom edge rough machining production.

The utility model discloses an EMAS characteristic blocking material unloading and cutting device which is characterized in that an unloading mechanism comprises a main body frame, and a walking trolley and a lifting pallet fork assembly are arranged on the main body frame and used for transferring products; the sawing machine mechanism comprises a bottom frame, a sawing machine platform is arranged on the top face of the bottom frame through a guide rail assembly, and the sawing machine platform linearly reciprocates on the top face of the bottom frame in the length direction of the bottom frame through a driving assembly. The top cutting mechanism is erected above the sawing machine mechanism and located on one side of the lower frame mechanism. The front-back cutting mechanism comprises a front cutting assembly and a rear cutting assembly which are arranged at the two ends of the bottom frame correspondingly. The left-right cutting mechanism comprises a left cutting assembly and a right cutting assembly which are arranged on the top cutting mechanism and located on the two sides of the sawing machine platform respectively. According to the off-frame cutting equipment for the blocking materials with the EMAS characteristics, automation of product transferring and cutting is achieved, manual participation is reduced, and the working efficiency and the cutting effect are improved.

The invention relates to the technical field of laser cutting devices, and provides a laser cutting device for knapsack production, which adopts a back cutting process mode, can effectively reduce hair surface damage and improve cutting quality while being matched with a fur material to complete auxiliary cutting operation, and is matched with a special positioning structure of the fur material. The cutting-in device can achieve cutting-in action relative to a fur material more accurately, the pressing contact area of the cutting-in device and the fur material is smaller, so that pressing-down on a fur surface is reduced to a greater extent, and the adverse effect on the fur surface during cutting operation is further reduced. The cutting-in device comprises an equipment base, and further comprises a cutting structure and an electrostatic adsorption structure, and a mounting cylinder is fixedly connected into the equipment base; the cutting structure comprises a laser cutting head, the laser cutting head is mounted in a mounting cylinder through a driving assembly, a glass workbench is mounted at the top end of the mounting cylinder, the electrostatic adsorption structure comprises a lifting frame and an electrostatic conductor plate, the lifting frame is slidably connected with the equipment base, and an electric lifting rod is mounted at the top end of the lifting frame.

The utility model belongs to the field of clothes, and particularly relates to a school uniform vest with a warning function and a night safety function, which can improve the safety of the clothes, comprises a vest body, and is characterized in that the vest body is formed by splicing a front cutting piece and a rear cutting piece at the top; a front warning lamp and a rear warning lamp are installed at the chest position and the back position of the front cutting piece respectively, the front warning lamp is installed on straps on the two sides of the chest position of the front cutting piece, a pocket for containing a circuit board is arranged on the front cutting piece, a power line is arranged in the straps and connected to the circuit board, and the back warning lamp is installed on the back of the back cutting piece. The rear warning lamp is installed on a warning strip, a circuit board is arranged in the warning strip, and the warning strip is bonded with the rear cutting piece through a hook-and-loop fastener.

The invention relates to a method for controlling the oxygen content of a silicon single crystal rod. The method comprises the steps that an oxygen content target value and the change rate of the oxygen content along with the reverse cutting length are preset; according to the change rate of the oxygen content along with the reverse cutting length, the oxygen content of the rod in the last heat and the oxygen content of the rod in the last heat are obtained; according to the oxygen content of the current rod in the last furnace and the oxygen content of the last rod in the current furnace, the oxygen content of the current rod in the current furnace is obtained; and according to a preset oxygen content target value and the oxygen content of the rod of the furnace, the reverse cutting length of the rod of the furnace is obtained. According to the method and the device, the reverse cutting length of the single crystal silicon rod of the current furnace time and the current rod time can be accurately controlled, so that on the basis of ensuring that the oxygen content of the single crystal silicon rod reaches the standard, the problems of waste of the single crystal silicon rod and production efficiency reduction caused by secondary reverse cutting are avoided.

The invention belongs to the technical field of glass film laminating, and discloses a vertical frame type glass film laminating machine which comprises a film laminating mechanism and conveying mechanisms arranged on the front side and the rear side of the film laminating mechanism, the film laminating mechanism comprises a film laminating support, and a front film laminating assembly and a rear film laminating assembly are oppositely arranged on the film laminating support; the front film covering assembly comprises a front film scraping assembly, a front cutting assembly, a rotationally arranged front roller and a conveying assembly, the rear film covering assembly comprises a rear film scraping assembly, a rear cutting assembly and a rotationally arranged rear roller, the front roller and the rear roller are used for rolling and covering the two sides of the glass, and the front film scraping assembly and the rear film scraping assembly are used for scraping plastic films attached to the two sides of the glass to be flat; the front cutting assembly and the rear cutting assembly cut plastic films after the two sides of the glass are pasted with the films. In this way, as long as the glass moves forwards along the conveying assembly, the film covering work can be completed after one stroke of movement, manual participation is not needed, the automation degree is high, the production efficiency of glass film covering is greatly improved, and the production cost is reduced.

Disclosed in the present invention are a device for preparing an incompletely covering coating on a cemented carbide blade and a method for preparing a multilayer-coated cemented carbide blade. The device comprises a base plate (1) and / or a cover plate (2) which can be placed in a high-temperature coating furnace, wherein the base plate (1) is plate-shaped, and a cavity (3) capable of accommodating a blade to be coated (9) is formed on an upper surface (10); a back coating opening (4) penetrating through an outer peripheral surface of the base plate (1) is formed on a side surface (31) of the cavity (3), and the back coating opening (4) at least corresponds to any incompletely covering coating unit to be formed on a back cutting surface (92) of said blade (9); the cover plate (2) can cover a front cutting surface (91) of said blade (9), the cover plate (2) is provided with a front coating opening (5) penetrating through the upper and lower surfaces of the cover plate (2), and the front coating opening (5) at least corresponds to any incompletely covering coating unit to be formed on the front cutting surface (91) of said blade (9). By means of the device of the present invention, the method can achieve the preparation of a layer of incompletely covering coating units on the surface of the cemented carbide blade, and the prepared multilayer-coated blade is stable and reliable and has good coating performance.

The utility model discloses a backing paper back cutting waste removing device which comprises a discharging assembly, a slitting assembly and a material distributing assembly. The discharging assembly is used for providing materials for the slitting assembly. The slitting assembly comprises a slitting roller, a moving mechanism, an adjusting mechanism and a cutter mechanism. Materials provided by the discharging assembly bypass the position below the slitting roller, the output end of the moving mechanism is connected with the adjusting mechanism, the moving mechanism is used for driving the adjusting mechanism to move, the output end of the adjusting mechanism is connected with the cutter mechanism, the adjusting mechanism is used for adjusting the height of the cutter mechanism, and the cutter mechanism is arranged below the slitting roller. The cutter is used for cutting materials; and the material separating assembly is used for separating the cut materials from the waste materials. According to the utility model, waste materials can be removed in the production process, and the production efficiency of products is improved.

The application discloses a kind of warping LED chip protection liquid method, in turn is chip front face film, back cutting, chip overturn, protection liquid drop, protective film covers, vacuum adsorption and centrifugal rotation.Combining the warping characteristics of the existing grinding method to the LED chip, by chip front face film, reduce the risk of chip fragment, chip back cutting releases grinding stress to reduce chip warping, protective film covers can guarantee that all areas of warping LED chip are wrapped with protection liquid, centrifugal rotation makes the protection liquid of LED chip surface everywhere uniform, forms tight and uniform protective layer on the surface of LED chip, plays the role of isolation heat and metal debris when laser cutting, achieves the effect that chip surface circuit is not oxidized and chip is not broken edge, after laser cutting, clean up metal debris and residual protective layer completely.

The invention discloses an anti-overcut satellite antenna reflecting surface shearing device, and belongs to the technical field of cutting equipment. The device comprises a lathe bed module, a laser cutting module and a bottom preheating module, the bottom preheating module is arranged below a laser cutting head, a trumpet-shaped laser waste heat absorption opening of the preheating device is used for absorbing waste heat of cutting points on the back of a plate, and a blower device is matched with an air heating mechanism to conduct the waste heat to a conical preheating nozzle; the device is provided with a preheating module for preheating plates on a follow-up cutting route, the overcutting risk in the laser cutting process is effectively reduced, the device is further provided with a lifting material preparation module, automatic replacement of a multi-station plate cutting table board can be achieved, and the production efficiency is improved. The method is particularly suitable for machining precise curved surface components such as a satellite antenna reflecting surface, the quality of the cut edge can be remarkably improved, and the subsequent assembly flatness is guaranteed.

The utility model discloses a multi-fillet double-sided four-edge square shoulder milling blade, which is characterized by comprising a blade main body with a cuboid structure, two symmetrically arranged bulges are formed on each of the upper plane and the lower plane of the blade main body, and a side edge, a bottom edge and a fillet are formed at the joint of each bulge and one side surface, the joint of each bulge and a rear cutter surface as well as the joint of each bulge and an arc surface; a chip breaking area is formed between each protrusion and the upper plane or the lower plane. The four cutting edges which can be used for cutting are formed on the cutter, the first front cutter face, the second front cutter face and the curled face are formed on the side of each cutting edge, the requirements for chip breaking and chip curling in different cutting depths in the cutting process can be met, the perpendicularity of the cutter machining face is high, the machining precision is high, and the service life of the cutter is prolonged. The milling cutter is simple in structure, capable of guaranteeing that products of different batches keep stable and consistent machining quality, suitable for square shoulder and plane milling of steel parts, stainless steel, high-temperature alloy, titanium alloy and other materials, wide in application, high in blade utilization rate, long in service life and high in overall economic value.

The present application relates to the technical field of food processing, and discloses an automatic eel aligning, positioning, cutting and killing device for aquatic product processing, which comprises a rack, a cutting and killing box body arranged on the rack, a plurality of feeding channels arranged on one side of the cutting and killing box body, a lifting assembly arranged on the rack and used for controlling the lifting of the cutting and killing box body, a first cutting and killing box and a second cutting and killing box arranged in a vertical mode, a plurality of feeding ports arranged on one side of the first cutting and killing box and the second cutting and killing box in a horizontal mode, the number of the feeding ports being the same as that of the feeding channels, a plurality of discharging ports arranged on the other side of the first cutting and killing box and the second cutting and killing box in a horizontal mode, the number of the discharging ports being the same as that of the feeding ports, and a plurality of cutting and killing assemblies arranged in the cutting and killing box, each of the feeding ports being provided with a cutting and killing assembly. The present application can realize the abdominal cutting and killing and the back cutting and killing of eels, and has the effect of improving the cutting and killing quality.

1. Name of the product in this design: Edge sewing machine (double-sided sewing and subsequent cutting). 2. Application of this design: This design is used for edge stitching of textiles. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

Label-liner combinations are provided, each label-liner combination includes a liner substrate and a label substrate. The label substrate includes a first adhesive coated on the backside of the label substrate and an adhesive patch atop a portion of the first adhesive in an area that defines a piggyback label within the label substrate. The label substrate further includes die cuts around a periphery of the adhesive patch. The liner substrate includes a back cut for a removal tab of the piggyback label. The front side of the liner substrate is joined with the backside of the label substrate to form a label-liner combination with an embedded and independent piggyback label defined in an area of the label substrate by the adhesive patch, the die cuts, and an area associated with the back cut in the liner substrate for the removal tab.

The invention discloses an in-situ characterization method for a metal crystal cutting process, which belongs to the field of ultra-precision machining and comprises the following steps: S1, preparing a diamond cutter: preparing a diamond micron slice, cutting a rear cutter surface and a front cutter surface by using current, and polishing the diamond cutter; s2, preparing a workpiece sample: selecting an atomic force microscope probe, preparing a rectangular micron slice by using a focused ion beam micro-nano processing technology, processing a plurality of rectangular slices on the rectangular micron slice by using a focused ion beam, and purging the rectangular slices by using the focused ion beam to complete preparation of the workpiece sample; and S3, cutting experiment: installing the diamond cutter and the workpiece sample on an X-Nano sample rod, cutting the workpiece sample by the diamond cutter, and shooting a bright field image, a dark field image and an electron diffraction pattern of the to-be-detected area by using a transmission electron microscope. According to the invention, the bottleneck that the plastic deformation and fracture behavior of the material in the turning process cannot be dynamically observed in the prior art is broken through.

The application discloses a manually-resettable electric cutting and suturing device, which is internally provided with a driving gear, a sliding gear and a manual reset mechanism in a hand-held part of the electric cutting and suturing device, the manual reset mechanism comprises an operating handle and a sliding gear pushing assembly; the operating handle is rotatably installed on a rotating shaft arranged in the hand-held part, and an outwardly extending pawl is slidably arranged on the operating handle; the sliding gear pushing assembly comprises a cam, a pin shaft, a connecting rod, a limiting sliding block and a pushing spring; the limiting sliding block is slidably arranged in the hand-held part and connected with the pushing spring at a rear end, and a front end of the limiting sliding block is in space interference with a movement track of the pin shaft. Under the premise of meeting the manual back cutting, the pawl structure is adjusted and the limiting sliding block is arranged, so that the locking state of the cam can be released through the subsequent operation of the limiting sliding block, the cam drives the sliding gear to return to the initial state, the whole mechanism is reset to the initial state, and the repeated use of the product is realized.

The invention relates to a processing method for flattening a front body of a female type thermal shirt. A top fly manufacturing method comprises the following steps: S11, making a top fly inner opening line mn; s12, cutting off along a front fly inner opening line mn to increase an extension cutting piece; s13, folding is carried out, so that the mabn is attached to the mncdef; s14, sewing mabn and mncdef along a folding line xy in the front fly; s15, the xmny is folded towards the front face of the xydef along the front fly inner folding line xy, so that the xmny is attached to the front face of the xydef, the mabn is driven to be turned towards the front face, and the mabn is an improved front fly; a breast pocket plate making method; the thickness of the front fly is reduced, so that the front fly is light, thin and soft, the front body is integrally flat, and the garment is comfortable and soft to wear; the extension cutting piece expands the pinching and folding loss amount of the front placket; the waist dart and the chest dart conform to the waist line and the chest line of a woman, the front body is made to be three-dimensional, meanwhile, the pocket cloth rear cutting piece topus, the pocket cloth bright stem cutting piece u1v1x1w1 and the pocket cloth front cutting piece wxpqr extend out of the chest dart, the pocket cloth rear cutting piece topus, the pocket cloth bright stem cutting piece u1v1x1w1 and the pocket cloth front cutting piece wxpqr are combined with the waist dart and the chest dart to be flatly attached to the clothes body after being sewn, and the chest shape is attached to the clothes body in a three-dimensional mode after being worn.

It is known that if the bend line of the undercut (the innermost part (bottom) of the undercut, the intersection of the diagonal cut line and the cross cut line) is formed perpendicular to the felling target, then by making an appropriate back cut afterward, the tree can be felled accurately toward the felling target. This specification discloses a technique that reduces the burden of verification work compared to conventional methods and allows for accurate verification of the direction perpendicular to the bend line. [Solution] The tree felling target indicator disclosed herein is elongated and plate-shaped, and has a contact portion having a first long side and a second long side opposite to the first long side, and an elongated plate-shaped indicator portion extending perpendicularly from the center of the first long side. When viewed from above, the contact portion and the indicator portion form a T shape.

The utility model discloses an automatic back cutting device which comprises a machine frame, a round roller transmission assembly is horizontally arranged in the machine frame, a pressing assembly is arranged above the round roller transmission assembly and connected with the upper portion of the machine frame, a cutter moving assembly is arranged below the round roller transmission assembly, and the cutter moving assembly is connected with the lower portion of the machine frame. The moving direction of the cutter moving assembly is perpendicular to the moving direction of the round roller transmission assembly, a plurality of cutters are arranged on the cutter moving assembly, and the cutters are distributed in the round roller transmission assembly at intervals. The automatic back opening and cutting equipment has the advantages of high automation efficiency, high precision and high safety.

The invention provides a semiconductor process method and a semiconductor structure. The method comprises the steps that a cutting groove with the depth smaller than that of a cutting channel is formed in the back cutting channel of the semiconductor structure; arranging a back gold layer to cover the packaging unit and the exposed surface of the cutting groove; the cutting groove is filled with an isolation protection layer not lower than the back gold layer; and cutting the semiconductor structure at the position of the isolation protection layer to obtain separated packaging units, wherein the isolation protection layer covers the back gold layer on the side wall of the cutting groove. According to the invention, the isolation protection layer is arranged in the cutting groove, so that the isolation protection layer covers the back gold layer on the side wall of the cutting groove after the packaging unit is cut, the back gold layer is prevented from being peeled off due to corrosion during back-section packaging cleaning, and the structural reliability of the packaging unit is improved; meanwhile, the thickness of the isolation protection layer on the two sides of the cutting position is set, and the cut isolation protection layer covers the back gold layer on the side wall of the cutting groove; in addition, the isolation protection layer is arranged to ensure the protection effect on the back gold layer; and finally, a boss of the heat dissipation cover is arranged, so that the isolation protection layer is not influenced by the structural stress of the heat dissipation cover.

The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting device, a cutting method and a cutting system. The laser cutting device comprises a feeding device, a first y-direction moving device, a turnover belt line, a second y-direction moving device, a discharging device, a cover plate folding and unfolding device and a laser processing device which are sequentially arranged along an x direction. The first y-direction moving device is provided with a first transfer belt line and a first cutting platform, and the second y-direction moving device is provided with a second transfer belt line and a second cutting platform. In other words, the laser cutting device can complete front and back cutting of a product by using one device, or can be connected in series by two devices, one of which cuts the front surface and the other cuts the back surface. The problem of large taper of single-surface cutting products can be solved, and the efficiency of double-surface cutting can be at least doubled. Since there are carriers and cover plates, the products are in the middle layer, which can well press the products for cutting, and the products will not move as in single-surface cutting.

The present invention provides a method for determining the surface roughness of brittle material turning considering tool-piece coupled contact, comprising the following steps: calculating the collision contact force F between the rake face and the brittle material; r ; Calculate the adhesive contact force F between the blunt cutting edge and the brittle material a and the fracture crushing force P of the brittle material during tool-piece extrusion contact; Calculate the normal load F in the Hertzian contact between the flank face and the brittle material f and plowing force f f ; Calculate the contact radius b and height h between a single hard protrusion peak and the back cutting edge r Calculate the initial angle δ, crack propagation length c, and deflection angle α of the surface pit formed by the fracture and crushing of the brittle material; and establish a theoretical model for surface roughness during turning of brittle materials based on the data obtained in these steps. This invention, which belongs to the technical field of brittle material machining, for the first time considers both the tool and the workpiece as simultaneously affected by the tool-workpiece coupled contact relationship, innovatively incorporating tool wear and tool material properties into the parameters of the theoretical surface roughness model.

The invention discloses a back opening processing method for fish products, which comprises the following steps of: feeding fish to be processed into a conveying assembly line, moving forwards in a clamping state, and automatically finishing back opening cutting treatment when the fish passes through a cutter, and is characterized in that the fish to be processed is shot before being fed into the conveying assembly line; fish body size data are obtained through the computer vision recognition technology, then the position of the cutter is calculated and adjusted, and the fish back and the fish head are integrally cut open when the cutter is used for cutting until only the belly part is reserved for connection. According to the automatic fish back cutting device, automatic cutting processing of the fish back can be completed, meanwhile, the consistency of the cut size of the fish body can be well guaranteed, the subsequent processing reliability can be better improved, the labor loss of fish product processing is reduced, and the automation degree of fish product processing is improved.

The invention relates to the technical field of recycling, in particular to a pouring forming mold based on asphalt concrete waste crushing and recycling. Comprising an equipment frame and a bottom plate installed on the equipment frame, a base is fixedly installed on the bottom plate, an I-shaped mold frame is fixedly installed on the base, a main hydraulic cylinder is fixedly installed above the bottom plate through a plurality of supporting columns, a movable seat with the upper end fixedly connected with the main hydraulic cylinder is jointly installed on the supporting columns in a sliding mode, and a pressing block is fixedly installed at the lower end of the movable seat; a demolding mechanism is arranged on the moving seat; in the demolding process after the pressing stage, left and right cutters and front and back cutting-off devices move downwards in sequence to cut off cured and adhered asphalt on a pressing block, and the problem that the edge of a brick body is pulled and damaged when the pressing block moves upwards is solved; meanwhile, a high-temperature medium is introduced into the liquid storage cavity to preheat the mold frame to ensure the asphalt compaction fluidity, a low-temperature medium is switched after pressing to accelerate the curing process, and the brick forming integrity and the production efficiency are improved.

The application discloses a whole piece of cloth suit cutting method, comprising the following steps: S10, obtaining a whole piece of cloth; S20, determining a collar contour cutting area Z1; determining a lapel lining cutting area Z2; determining a shoulder back cutting area Z3 and a front lower hem cutting area Z4; determining a sleeve cutting area Z5 and a front piece cutting area Z6; cutting according to the corresponding cutting lines, removing the excess cloth, and obtaining cutting cloth; S30, folding the cutting cloth along the connecting part of the collar contour cutting area Z1 and the shoulder back cutting area Z3, folding and sewing the sleeve cutting area Z5 to form a sleeve, sewing the shoulder back cutting area Z3 and the sleeve cutting area Z5 to form an armhole, folding and sewing the front lower hem cutting area Z4 and the front piece cutting area Z6, and obtaining an integrated suit; the sewing comprises fixed sewing or movable sewing, the process flow is simple, and cloth waste is avoided. The application further provides an integrated suit made by the cutting method.

The invention relates to the technical field of double-faced woolen cloth, and discloses a manufacturing process of a double-faced woolen cloth overcoat. The manufacturing method sequentially comprises the steps of manufacturing a double-faced woolen cloth cutting piece with a cut seam, manufacturing left and right front connecting sleeve pieces with the cut seam and drawn, manufacturing front connecting sleeve cutting pieces for digging bags, splicing two front connecting sleeve cutting pieces of a front facing, manufacturing a whole slit rear piece cutting piece, manufacturing a rear undersleeve splicing cutting piece of a sleeve slit, and splicing a rear piece cutting piece of a rear undersleeve. Cutting the main body and sleeves of the spliced whole piece of clothes, splicing the whole piece of overcoat with a hat and a rear collar tape, and treating the whole piece of overcoat with a front, middle and lower hem hat opening; and finally, the whole overcoat is subjected to lock hole and button sewing, and the complete whole double-faced woolen coat is obtained. The manufacturing process is a whole-body manufacturing process of the double-faced woolen coat, the problem that the thickness of a splicing seam is large is effectively solved, and the front lower hem, the sleeve vents and the rear vent are not upwarped and are flat and attractive; a sleeve center seam lifting process is adopted in a matched mode, and the sleeves are straight and attractive when naturally drooping.

The invention belongs to the technical field of cutting equipment, and particularly relates to a gum cutting and slitting device which comprises a workbench, a control box and a driving box are fixedly installed on one side of the workbench, a driving shaft is installed on the inner wall of the driving box in a transmission mode, and a positioning seat is fixedly installed on the outer wall of the driving shaft through arranged fixing bolts; and a plurality of sliding seats A and sliding seats B are slidably mounted on the outer wall of the driving shaft, the sliding seats A are located between the positioning seat and the sliding seats B, cutting knives are fixedly mounted on the outer walls of the positioning seat, the sliding seats A and the sliding seats B, and a distance adjusting assembly is arranged between every two adjacent cutting knives. By pushing the sliding seat B and utilizing the linkage effect of the spacing adjusting assembly, the spacing of all the cutters can be adjusted at a time, the adjusting efficiency is greatly improved, the downtime of equipment is shortened, and the cutter spacing adjusting device is particularly suitable for production scenes where the cutter spacing needs to be adjusted frequently so as to adapt to different product specifications.

The invention discloses a silicon rod reverse cutting amount intelligent adjusting method, which comprises the following steps: collecting silicon rod oxygen content and a corresponding silicon rod number uploaded by an oxygen detector, collecting the silicon rod number and the silicon rod length uploaded by a reverse cutting machine at the same time, and establishing a system database; calculating the reverse cutting times of the silicon rod; performing data association to obtain complete data; the data subjected to data classification is stored in an SQL Server database; a prediction optimization model is established, the model is trained through the data subjected to data classification, and the predicted reverse tangent amount is output; and according to comparison between the back-tangent amount data output by the prediction optimization model and the actually qualified data in the database, verifying whether the back-tangent amount output by the model accords with a preset precision range. According to the method, the reverse cutting amount can be judged through the system, intelligent optimization prediction of the reverse cutting amount is achieved through the prediction optimization model, the situation that manual extensive grading is conducted for machining is avoided, reverse cutting waste is reduced, and the reverse cutting frequency is reduced.

The present invention provides a variable clearance angle ball nose end mill and a grinding method thereof, belonging to the field of metal cutting processing; the variable clearance angle ball nose end mill comprises a shank and a cutting portion, wherein the cutting portion has at least one set of chip grooves and back cutting surfaces symmetrically arranged on the circumference from the top of the ball nose to the junction with the shank; the first back cutting surface of the back cutting surface intersects with the chip groove, and a spiral edge and a ball nose edge are sequentially formed on the intersecting ridge line; the two opposite first back cutting surfaces intersect at the top of the ball nose to form a concave chisel edge; the back angle of the first back cutting surface changes linearly between the center of the chisel edge and the intersection of the ball nose edge and the spiral edge, that is, gradually decreases from the intersection of the ball nose edge and the spiral edge to the center of the chisel edge; and remains constant at any position on the spiral edge. The present invention provides a ball nose end mill structural solution that reduces the concave depth of the chisel edge, improves the contour of the ball nose center, thereby improving the surface finish of the workpiece being processed, and enhancing the strength and wear resistance of the chisel edge.