The invention relates to a circular saw blade with detachable cutting heads, which comprises a saw blade matrix, cutting head connection block bodies and the cutting heads. A plurality of water tanks are uniformly distributed on the matrix along the circumference; each water tank is provided with an arc bottom; the side wall of each water tank is provided with a matrix connection half groove; the cutting head connection block bodies are arranged in the water tanks; the side walls of the cutting head connection block bodies are provided with block body connection half grooves; each matrix connection half groove and the corresponding block body connection half groove are combined into one hole; connection bolts pass through the holes to fixedly connect the cutting head connection block bodies and the matrix; the cutting heads are fixedly connected with the cutting head connection block bodies by cutting head fixing bolts; the cutting heads are all positioned at the same sides of the cutting head connection block bodies; and the side walls at both sides of the cutting head connection block bodies are also provided with square grooves for occluding the side walls of the water tanks. According to the invention, the circular saw blade with the detachable cutting heads is adopted and the cutting head connection block bodies are respectively in lossless detachable connection with the saw blade matrix and the cutting heads, so that not only can convenient installation and disassembly of the cutting heads be implemented, but also damage to the matrix and the cutting heads, which is caused by direct welding of the cutting heads and the matrix, can be avoided and service life of the cutting heads and the matrix is ensured.

Circular saw blade with detachable cutting heads

The invention discloses a silicon nitride strip cutting device. The silicon nitride strip cutting device comprises cutters, the cutters are fixed through a rotating shaft, and the rotating shaft is braked by a motor. Compared with a traditional technique, the cutters are improved, cutting of multiple silicon nitride strips can be conducted simultaneously, energy consumption is reduced, and the spacing distance among cutter heads can be regulated to be consistent, so that it is guaranteed that the silicon nitride strip obtained after cutting have the consistent size.

Silicon nitride strip cutting device

The invention discloses a sleeper cutting tool bit which comprises a rotating shaft, as well as a first cutting body used for cutting an inclined plane of a sleeper, and a second cutting body used forcutting an arc-shaped surface of the sleeper; the first cutting body is arranged in the middle of the rotating shaft in a sleeving mode, and comprises a plurality of cutter sets; and the second cutting body comprises two ends arranged on the rotating shaft in a sleeving mode. After the structure is adopted, during cutting, the sleeper cutting tool bit is close to and is embedded into the profilesurface of the sleeper, the first cutting body is attached to the inclined plane of the profile surface, and the second cutting body is embedded and attached to the arc-shaped surfaces of the right and left sides of the inclined plane; and then, the rotating shaft is driven by a power unit to drive the first cutting body and the second cutting body to cut the profile surface of the sleeper. Compared with the prior art, the sleeper cutting tool bit has the beneficial effects that the sleeper cutting tool bit can be tightly attached to the profile surface of a sleeper, and the cutting precisionand the cutting quality are improved; and only one-time positioning is needed during machining, and the cutting process is more convenient and efficient.

Sleeper cutting tool bit

The invention discloses machine tool teeth used for rock slotting and an installation method thereof and belongs to the technical field of constructional engineering/mining machinery. The machine tool teeth are in a cake shape and comprise a base material and artificial diamond, and only the artificial diamond serves as a cutting edge to scrape and cut rock. When the machine tool teeth are brazed on a work component of slotting equipment, the cutting angle of the machine tool teeth used for cutting the bottom of a rock groove is from minus 20 degrees to minus 7.5 degrees, and the cutting angle of the machine tool teeth used for cutting the lateral faces of the rock groove is from minus 15 degrees to minus 5 degrees; the number of the machine tool teeth is four or more and is an even number; the machine tool teeth are distributed on the circumference of a sawing disk of a sawing machine or a drilling tube of a core drilling rig at equal intervals left and right or inside and outside. According to the using varieties of the machine tool teeth used for rock slotting and the installation method thereof, as a result, the rock is scraped and cut, the cutting (drilling) efficiency is improved by three to seven times, the construction period of construction units is shortened greatly, and the composite cost of the construction units is reduced.

Machine tool teeth used for rock slotting and installation method thereof

The invention provides a slotting cutter, equipment and a slotting method for testing fracture toughness of a graphite material. The slotting cutter for testing the fracture toughness of the graphitematerial is included. The slotting cutter for testing the fracture toughness of the graphite material comprises a cutter handle and a blade. The cutter handle is coaxially connected with a main shaftof a numerical control machine tool, and the blade rotates to perform numerical control slotting on a graphite material sample clamped and fixed by a fixture on a worktable instead of manual slotting,the influence of manual slotting on the accuracy of the test results is avoided, the technical problem of inaccuracy, caused by manual slotting, of graphite material fracture toughness testing is solved, the consistency of graphite sample material slotting is ensured, and the testing accuracy of the graphite material sample during fracture toughness testing is improved; and besides the numericalcontrol machine tool drives the specific slotting cutter to perform full-automatic slotting on the graphite material sample, the slotting speed and efficiency of the slotting cutter are far higher than the speed of manual slotting, and the testing efficiency is improved.

Slotting cutter, equipment and slotting method for testing fracture toughness of graphite material

A circular saw web allowing tool bits to be disassembled and assembled comprises a saw web base, tool bit connecting blocks and the tool bits. A plurality of water grooves are evenly distributed in the saw web base along the circumference of the saw web base; each water groove is provided with a circular-arc-shaped bottom; a base connecting half groove is formed in one side wall of each water groove; the tool bit connecting blocks are placed in the water grooves; a block connecting half groove is formed in one side wall of each tool bit connecting block; each base connecting half groove and the corresponding block connecting half groove are combined into a hole; connecting bolts penetrate through the holes to allow the tool bit connecting blocks and the saw web base to be fixedly connected; each tool bit is located on the same side of the corresponding tool bit connecting block. Square grooves used for being engaged with the side walls of the each water groove are formed in the side walls of the two sides of each tool bit connecting block. According to the circular saw web allowing tool bits to be disassembled and assembled, because the tool bit connecting blocks are detachably connected with the saw web base and the tool bits in a non-abrasion mode respectively, the tool bits can be convenient to assemble and disassemble, the damage to the saw web base and the tool bits due to the fact that the tool bits are directly welded to the saw web base can be avoided, and the service life of the tool bits and the service life of the saw web base are guaranteed.

Circular saw web allowing tool bits to be disassembled and assembled

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Circular saw blade with detachable cutting heads

Circular saw web allowing tool bits to be disassembled and assembled