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

The invention discloses a drilling method for a circuit board and belongs to the technical field of circuit board production. The drilling method comprises the following steps of setting a positioning target and a directional target on the circuit board, drilling a positioning hole in the positioning target and drilling a directional hole in the directional target; enabling the number of the directional target to be one and arranging the directional target in an area which is outside a horizontal central line and a longitudinal central line; identifying the direction of the circuit board through the directional hole, enabling a pin to penetrate the positioning hole and installing and fixing the circuit board and a cover plate; drilling the circuit board in the front side and the rear side and enabling the drilled holes in the front side and the rear side to be through holes. The drilling method for the circuit board can achieve circuit board drilling with the high thickness-diameter ratio and obtain high accuracy hole location.

The invention discloses a quenching strengthening process of a thin blade cutting edge. The process is characterized in that after a thin blade is integrally quenched by a traditional quenching process, the integrally-quenched thin blade is subjected to rough sharpening; the roughly-sharpened thin blade is moved at a high speed, the relative moving speed is 100-400 mm/s, when the thin blade moves,a high-power-density laser light spot is adopted to irradiate the cutting edge, the power density is larger than or equal to 150 W/mm<2>, the cutting edge forms a laser quenching layer, and finally fine sharpening is carried out, so that the thin blade with the quenched-strengthened cutting edge is obtained. A high-power-density laser device is matched with the fast-moving thin blade, so that thecutting edge of the thin blade is protected from being melted, the quenching effect is achieved, the sharpness, the wear resistance and the service life of the thin blade are improved, and the best performance of the material of the thin blade is played.

The invention discloses a cutting blade and a processing method thereof. The cutting blade comprises a blade body; an edge is arranged on the blade and is of a chamfering structure; the chamfering structure forms an inclined plane; the two ends of the inclined plane are respectively connected with a front blade face and a rear blade face of the blade; and the width of the chambering structure is 0.15-1 mm. The cutting blade and the processing method disclosed by the invention has the beneficial effects that the cutting resistance of the cutting blade is small, the workpiece processing accuracy is high, the processing method of the cutting blade is simple, and the production cost is low.

The invention discloses a two-edge special end milling cutter for a through groove, which comprises a cutter handle and a cutter body. The cutter body consists of a spiral groove, a side edge, an end surface cutting edge and a chip discharge groove. The two-edge special end milling cutter is characterized in that the end surface cutting edge is arranged at the top end of the cutter body and the inclination angle lambda s is equal to 3-8 degrees; and the chip discharge groove is arranged on the spiral groove adjacent to the central part of the end surface cutting edge, the front angle gamma 1 of the internal side of the end surface cutting edge is equal to 0-10 degrees, the front angle gamma 2 of the external side of the end surface cutting edge is equal to 30 degrees, the rear angle alpha 0 of the end surface cutting edge is equal to 12-15 degrees and the spiral angle beta of the spiral groove is equal to 30 degrees. The end milling cutter has the advantages that the cutting edge is sharp, the chips are discharged smoothly, the processing efficiency is high, the problems that the groove bottom quality is poor and the cutter is apt to be broken when the common two-edge end milling cutter is used for milling through grooves are solved, and the end milling cutter is suitable for processing all kinds of through grooves.

The invention discloses a CNC cutting tool. The CNC cutting tool comprises an integrated body and a cutting edge. One end of the body is the fixing end of the cutting tool, and the other end of the body is the cutting end; and the outer contour of the cutting end is the same with the contour of a to-be-machined aperture, the cutting edge is the last edge of the cutting end, and the end face of the cutting end is an internal concave hook face. According to the CNC cutting tool, the invention further provides a CNC machining method. The CNC machining method comprises the following steps that (1), through a common drill or a milling cutter, a to-be-machined part is subjected to rough treatment; (2), main shaft rotation is stopped, the CNC cutting tool is switched, and the orientation of the CNC cutting tool is positioned; (3), the cutting tool falls quickly to conduct punching; and (4), the cutting tool is raised up, and machining is finished. According to the CNC cutting tool and CNC machining method, tool breaking is not prone to happening, so that a defective product owing to tool breaking is not produced, the machining speed is quick, and the service life of the cutting tool is long.

The invention provides a clamp special for a flat turbine head end face. By using the clamp, the clamping positioning of a three-jaw chuck meets a clamping requirement, the machining efficiency is high, a machined surface is smooth, a fracture phenomenon is not easy to cause, and the centre beat of a machined component is low. The clamp special for the flat turbine head end face comprises the three-jaw chuck, a base and a flat turbine, and is characterized in that: the upper part of the base is provided with an open cavity body; the flat turbine is arranged in the cavity body; an end cover is covered on the outer end surface of the cavity body; a centre hole is formed in the end cover; the head end surface of the flat turbine is exposed from the centre hole of the end cover; the outer circumference of a worm wheel of the flat turbine is adhered to the inner end surface of the cavity; and the three-jaw chuck clamps the outer edge surface of the base.

The invention relates to the technical fields of cutting tools, particularly to a deep hole forming tool. The deep hole forming tool comprises a tool shank and a cutting module at the front end of the tool shank, wherein the cutting module is composed of a third cutting unit connected with the tool shank, a second cutting unit at the front end of the third cutting unit, and a first cutting unit at the front end of the second cutting unit; the third cutting unit and the second cutting unit are in a ball shape and are connected through a transitional smooth curved surface; the first cutting unit is composed of a taper unit connected with the second cutting unit, and a ball unit at the front end of the taper unit, and the small-diameter end of the taper unit is smoothly connected with the second cutting unit; the cutting module is provided with at least three screw cutting edges uniformly distributed in the circumferential direction of the cutting module, and the screw cutting edges are correspondingly provided with screw flutes and converge in the center of the front end of the first cutting unit. According to the deep hole forming tool, during a cutting process, the contact area between the cutting module and hole walls can be small, so that the possibility of tool tipping due to radial movement can be greatly reduced.

The invention discloses a PCB (printed circuit board) drilling process, which adopts a plurality of cutters to sequentially perform two different processing modes such as multi-stage drilling and compensation milling to process a through hole of a PCB, and ensures that the deformation in the through hole processing process is small, so that the processing efficiency of the PCB is improved, and the processing quality of the PCB is improved. The drilling hole position precision and the through hole diameter are within a preset tolerance range. According to the PCB drilling technology, the through holes of the PCB are machined in two different machining modes of multi-stage drilling, compensation milling and the like in sequence through multiple cutters, so that deformation in the through hole machining process is small, the drilling hole position precision and the through hole diameter are both within the preset tolerance range, and the machining precision of the PCB is improved. The problems that through holes are large in top and small in bottom and different in diameter in conventional machining are completely eradicated, multiple tools share milling pressure in turn in the machining process, the tools are not prone to being broken, and the reliability of the machining technology and the yield of PCB machining are guaranteed.

The invention belongs to the technical field of thick plate drilling, and discloses a thick plate segmented drilling method and a drilling machine. The thick plate segmented drilling method comprisesthe following steps of step 1, a cutter drills into a plate for a certain distance at a first rotating speed, and the position of the cutter is maintained for a period of time at the first rotating speed; 2, while the cutter drills into the plate, the drilling speed of the cutter is gradually increased till the set drilling speed is reached, the cutter continues to drill into the plate for a certain distance, and the position of the cutter is kept for a period of time at the first rotating speed; and the step 2 is repeated until the cutter drills down to the final depth. The smooth finish of ahole wall is ensured by not returning the cutter in each segmentation; and the drilling speed is gradually increased while the plate is drilled, the speed of accelerating the cutter to feed again inthe plate is small, the axial force impact borne by the cutter when the cutter cuts into the plate can be reduced, and cutter breaking is avoided. By means of the method, less segmented machining canbe achieved, cutter breaking is not likely to happen, and the effect of greatly improving the machining efficiency can be achieved.

The embodiment of the invention discloses a heat pipe groove forming tool for a 5G base station equipment shell. The forming tool comprises a tool handle and a cutting portion which are integrally formed. The tool handle and the cutting portion have the same center axis. The cutting portion comprises a cutting blade and a chip groove. The cutting blade comprises a lower arc cutting blade, a linearcutting blade and an upper arc cutting blade which are sequentially connected from bottom to top. The tool handle comprises a tool handle body and a connecting transition portion. The cutting portionis connected with the tool handle body through the connecting transition portion. The embodiment of the invention further discloses a heat pipe groove forming method for the 5G base station equipmentshell. By adopting the forming method, it can be ensured that when the forming tool rotates, the cutting surface keeps line contact with materials, abrasion is not likely to be caused, and the service life of the tool is prolonged. The tool handle body and the cutting portion are connected firmly, and the tool is not likely to be broken. In the milling process, the cutting portion can stretch into materials to be machined through the transition portion, the forming technology for heat pipe grooves of different depths can be achieved, and the universality is high.