30results about How to "Not easy to break the knife" patented technology

The invention relates to an integrated type ultrathin resin grinding wheel with ultrahigh cutting perpendicularity. The grinding wheel comprises, by volume, 10-25 part of abrasive materials, 40-50 parts of resin binders and 10-40 parts of padding. Chopped fibers composed of carbon fibers and / or glass fibers are adopted as the padding, wherein the diameter of each chopped fiber is 5-20 micrometers, the length of each chopped fiber is 50-500 micrometers, and the length-diameter ratio of each chopped fiber is (10-100):1. Compared with an integrated type ultrathin resin grinding wheel made of traditional padding, the cutting perpendicularity of the integrated type ultrathin resin grinding wheel is obviously improved, a kerf can be reduced at least by about 0.01 mm, and the cutting perpendicularity is improved at least by about 28.6%; the grinding wheel is not prone to breakage, the dimension of a cut workpiece is good, and the cutting quality is greatly improved.

The invention relates to the technical field of railway equipment. A manufacturing unit and a support unit are integrated onto the same supporting platform by utilizing a pair of engine bases. The locomotive wheel numerical control lathing device provided by the invention is characterized in that a tool supporting structure, a shaft end positioning device and a shaft end supporting device are arranged on the same platform base (1), the shaft end positioning device comprises a positioning bending plate (5) and a connection plate (6) which are provided with a positioning boss (2), a mounting bolt hole (3) and an axial clearance adjustment bolt (4), and a concentric stepped hole (7) is arranged in the positioning boss (2); the positioning bending plate (5) is lengthways fixed on the platform base (1) along the center line of the rounded positioning boss (2); the tool supporting structure is of an inclined plane (12) formed by forward extended one side of the front end of the platform base (1), wherein the inclined plane (12) is parallel to a plane formed by the axial line of the positioning boss (2) and the radius of a working point. The device is light in weight, simple in structure and operation, high in working efficiency, and low in investment cost, is applied to locomotive wheel lathing operation in a railway locomotive department, and is particularly applied to the wheel lathing operation without the wheel lathing condition.

The invention discloses a scrap-free pipe cutting machine. The scrap-free pipe cutting machine comprises a main cutting shaft. A chuck for clamping a pipe is arranged inside the main cutting shaft in the axial direction. One end of the main cutting shaft is sleeved with a rotating sleeve, a cutter disc is fixed to the end face of the rotating sleeve, a blade sliding block and a supporting roller sliding block are installed on the cutter disc, the end face, far away from the main cutting shaft, of the blade sliding block and the end face, far away from the main cutting shaft, of the supporting roller sliding block are slopes, the blade sliding block is connected with a cutting blade through a bearing, and the supporting roller sliding block is connected with a supporting roller through a bearing. The outer side of the rotating sleeve is sleeved with a sliding outer sleeve. The inner wall of the sliding outer sleeve is in contact with the slope of the blade sliding block and the slope of the supporting roller sliding block, and under guiding of the slope of the blade sliding block and the slope of the supporting roller sliding block, the blade sliding block and the supporting roller sliding block are pressed by the sliding outer sleeve to move towards the center of the pipe. By means of the pipe cutting machine, the technical problem that a cut pipe opening of a cut pipe in the prior art has many waste scraps and burrs can be solved.

The invention discloses a hydraulic magnesium ingot cutting machine. The hydraulic magnesium ingot cutting machine comprises a machine frame, a hydraulic station, a material push device, a material press mechanism, a knife roller, a material collection hopper, a motor and an adapter plate, wherein the knife roller and the material collection hopper are arranged at the front end of the machine frame, the material collection hopper is arranged below the knife roller, the knife roller is in transmission connection with the motor, the material press mechanism is arranged on a platform of the machine frame, and is tightly close to the knife roller, the material push device is arranged on the rear portion of the platform of the machine frame, the adapter plate is arranged on the lower rear portion of the machine frame, the hydraulic station is connected with the adapter plate through an oil pipe, and the adapter plate is connected with the material push device and the material press mechanism through oil pipes. Compared with the prior art, the hydraulic magnesium ingot cutting machine has the advantages that installation and debugging are convenient, the attractiveness cannot be affected, the time is saved, clamping is convenient and rapid, operating noise is low, stability is good, inclined iron can be conveniently disassembled, the cutting capacity is improved, the knife breakage phenomenon cannot easily happen, the production cost is reduced, processing is easy, and the structure is simple.

The invention discloses a magnesium ingot machining unit. The magnesium ingot machining unit comprises a frame body, a hydraulic station, pushing devices, a pressing mechanism, a knife roll, a collecting hopper, a first motor, a chip breaking machine and a fan, wherein the knife roll and the collecting hopper are arranged at the front end of the frame body; the collecting hopper is arranged below the knife roll; the collecting hopper is connected with the fan through the chip breaking machine; the knife roll is in transmission connection with the first motor; the pressing mechanism is arranged on a platform of the frame body; the pressing mechanism is next to the knife roll; the pushing device is arranged on the back part of the platform of the frame body; the hydraulic station is connected with the pushing device and the pressing mechanism through oil pipes. Compared with the prior art, the magnesium ingot machining unit has the advantages of saving of time, convenience and rapidness in clamping, improvement on the cutting capability, difficulty in knife breakage, reduction of the production cost, saving of the adjusting time, high fixing reliability, guarantee of product quality, reduction of equipment investment cost, saving of electric energy and convenience in installation and connection.

The invention provides a drilling method for a printed circuit board (PCB). The method comprises the following steps of: 1, providing a PCB to be drilled, and determining drilling depth of a front surface and drilling depth of a back surface according to the thickness of the PCB; 2, providing a cover plate and a drilling cutter, and determining the length of a blade of the drilling cutter according to the drilling depth of the front surface and the drilling depth of the back surface of the PCB and the thickness of the cover plate; 3, determining a coordinate system for drilling on the front surface of the PCB, drilling positioning holes on the front surface of the PCB, arranging the cover plate on the front surface of the PCB and fixing the PCB and the cover plate respectively; 4, drilling through the cover plate by using the drilling cutter, drilling from the front surface of the PCB to form a half hole according to the drilling depth of the front surface of the PCB, and then feedingthe PCB; 5, inverting the PCB, determining a coordinate system for drilling on the back surface of the PCB, drilling positioning holes on the back surface of the PCB, arranging the cover plate on theback surface of the PCB and fixing the PCB and the cover plate respectively; and 6, drilling through the cover plate by using the drilling cutter, drilling from the back surface of the PCB to be communicated with the half hole to form a through hole according to the drilling depth of the back surface of the PCB, and feeding the PCB. In the method, a short-blade long drilling cutter is used for drilling from the two ends of the front surface and the back surface of the hole respectively, so a thicker PCB can be drilled through; and the method has the advantages of lower cost, higher drilling position accuracy and difficulty in breaking the cutter.

The invention belongs to the technical field of thick plate drilling, and discloses a thick plate segmental drilling method and a drilling machine. The thick plate drilling method includes the following steps: Step 1: The tool drills into the plate for a certain distance at the first rotational speed, and keeps The position of the tool and maintain the first speed for a period of time; Step 2: While the tool is drilling into the plate, gradually increase the drilling speed of the tool until the set drilling speed is reached. The tool continues to drill into the plate for a certain distance, maintain the position of the tool and maintain the first speed Rotate for a while; cycle step 2 until the tool drills down to the final depth. By not returning the tool in each segment, the smoothness of the hole wall is guaranteed; by gradually increasing the drilling speed while drilling into the plate, the speed of the tool’s refeeding acceleration in the plate is small, which can reduce the axis of the tool when it cuts into the plate Direct impact to avoid breaking the knife. This method can realize less sub-section machining, not only is not easy to break the knife, but also can achieve the effect of greatly improving the machining efficiency.

The embodiment of the invention discloses a heat pipe groove forming knife for a 5G base station equipment housing, which includes an integrally formed knife handle and a cutting part; the knife handle and the cutting part have the same central axis; the cutting part includes a cutting edge and a cutting part. chip flute; the cutting edge includes a lower arc cutting edge, a straight cutting edge and an upper arc cutting edge connected sequentially from bottom to top; the handle includes a handle body and a connecting transition part, and the cutting part passes through The connecting transition part is connected with the handle body. The embodiment of the invention also discloses a heat pipe groove forming method for a 5G base station equipment casing. By adopting the invention, it can ensure that the cutting surface and the material keep in line contact during the rotation process of the forming knife, which is not easy to be worn, and the service life of the knife is improved. The connection between the tool holder body and the cutting part is strong, and it is not easy to break the knife; during milling, the cutting part can extend into the material to be processed through the transition part, which meets the forming process of heat pipe grooves of different depths, and has strong versatility.

The invention relates to the technical field of a cutter for cutting machining, in particular to a two-edge pressure-type end mill. The two-edge pressure-type end mill comprises a cutter handle and an edge part which is arranged on the front end of the cutter handle, wherein the edge part is formed by a plurality of sections of spiral structures which are identical in structure and are connected with one another from front to rear, each spiral structure is formed by screwing a left-handed edge body and a right-handed edge body relative to the same axis for half circle, a plurality of spiral scale backs are uniformly arranged on the back surface of each spiral cutter body, a seamed edge of each spiral cutter body and a seamed edge of each scale back are respectively provided with a cutting edge, a spiral cutter withdrawing groove is formed between the two spiral cutter bodies, the seamed-edge side edges of all the spiral cutter bodies form a spiral cutting edge of the two-edge pressure-type end mill, and the front end edges, on the front end of the edge part, of the spiral cutter bodies are intersected to form a mill end edge. The two-edge pressure-type end mill is specially used for cutting a composite material, is free of layering, burrs and the like in the machining process, and is high in machining quality.

The jumping thread cutting device consists of a cutting blade screwed to a bearing, a cam anvil tube below the fixed blade, a connecting block, a fixing shaft over the connecting block, a locating cap, an eccentric cutter shaft inside the hole in the lower part of the connecting block and with one end fixed by the locating cap and the other end with bearing, a bearing, a gland for fixing the center of the cutting blade, and an anvil tube shaft penetrating the cam anvil tube to fix it. The present invention has the advantages of compact structure, high reliability, low cost, high longitudinal cutting precision and capacity of regulating the pressure to the longitudinal cutter during operation.