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5133 results about "Tool bit" patented technology

A tool bit is a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool, as distinguished from other cutting tools such as a saw or water jet cutter. The cutting edge is ground to suit a particular machining operation and may be resharpened or reshaped as needed. The ground tool bit is held rigidly by a tool holder while it is cutting.

Quick-acting tool bit holder

InactiveUS7086813B1Minimize off-axis “ cocking ”Prevent over-retractionThread cutting machinesTransportation and packagingTool bitCoil spring
A “snap-in” bit chuck assembly for a rotary hand or powered tool, includes an elongated body having a hex shank at its rearward end, an elongated retraction collar slidably disposed on the body, and an outer retaining collar fixed to the forward end of the body. The body has a coaxial hex socket formed therein to allow a reversible tool to be inserted thereinto. A slot is formed in the body, between the outer surface of the body and the internal hex socket. A coil spring surrounds the body, inside the retraction collar, and normally biases the retraction collar forwardly and biases a retaining clip toward the bottom of the angular slot. The retaining clip slides outwardly in the angular slot, against the bias of the coil spring, as the reversible tool is inserted, where a recess on the reversible tool is engaged and retained by the clip. The tool is removed by sliding the retraction collar rearwardly, to compress the coil spring and allow the retaining clip to retract back up the slot. The clip is directly engaged by the coil spring and has two legs extending about the body so that the clip is self-retaining. The clip legs extend around the body such that the retraction force on the coil spring is directed through the center of the coil spring to keep it coaxially aligned with the body.
Owner:BLACK & DECKER INC

Tool bit rock breaking mechanism and abrasion tester

The present invention provides a cutter rock-breaking mechanism which is applied in the technical field of the cutter experiment and an abrasion resistant tester thereof. The abrasion resistant tester comprises a hydraulic cylinder, a structural frame, a bearing plate, a cutter support, a disc-shaped hob and a rotation worktable. When the cutter rock-breaking mechanism and the abrasion resistant tester work, the disc-shaped hob is connected with the cutter support through a bolt. The cutter support is jointed and fixed on the bearing plate through the bolts. The hydraulic cylinder exerts a certain load to impact the disc-shaped hob to the rock sample on the worktable and generate a certain penetration. Afterwards the worktable is rotated through a power system to execute cutting test to the rock passively. The cutter rock-breaking mechanism and the abrasion resistant tester execute cutting with a single cutter to do the abrasion resistance test of the cutter. The bearing plate is provided with a groove. The regulation to the cutter space and the phase angle is realized through the variation of the jointing position of the cutter support on the bearing plate. The regulation to the inner deflection angle of the cutter is realized by changing the cutter supports with different angles. The positioning and rotation of the rock are realized through the rotating worktable. The designing of the device is novel and scientific. The knife angle, phase angle and inner deflection angle which affect larger to the rock breaking and abrasion of cutter are researched. The device settles the problem that two hob cutters simultaneously cut the rock.
Owner:NORTHERN HEAVY IND GRP CO LTD

Tool pan back-loading type device for changing tool of slurry-balanced shield machine under normal pressure

The invention relates to a tool pan back-loading type device for changing a tool of a slurry-balanced shield machine under normal pressure, which is applied to the technical field of shield machine engineering machinery. The tool pan back-loading type device for changing the tool of the slurry-balanced shield machine under normal pressure comprises a tool bit, a first seal ring, a tool post, a tool bit fixing sleeve, a tool bit fixing bolt, a tool bar, a cylindrical gate, a grease injection valve, a flushing valve, a third seal ring, a fourth seal ring, a bearing, a large end cover, an oil cylinder and the like; when the tool is in the working state, the tool bit is fixed on the tool bar through the tool bit fixing sleeve and the tool bit fixing bolt; the first seal ring is mounted at thefront end of the tool bar, and the tool bar is matched with the front end of the tool post and is sealed through the first seal ring; the tool bar is fixed on the tool post by the rear end of the tool bar and the tool post through a first fixing screw; the cylindrical gate is fixed on the tool post through the bearing and the large end cover; the grease injection valve and the flushing valve are installed on the tool post; and a serial number is arranged between the cylindrical gate and the tool post. The tool pan back-loading type device for changing the tool of the slurry-balanced shield machine under normal pressure has the advantages of simple structure, reliable working, and capability of conveniently and quickly changing a worn tool under normal pressure (atmospheric pressure) in the shield construction process.
Owner:SHENYANG HEAVY MACHINERY GROUP

On-vehicle disk brake lathe

A disk brake lathe has a pair of tool bits mounted to tool holders which are translatable parallel to a lathe axis to adjust the separation of the tool bits from a brake disk. A displacement gauge responds to changes in the separation between the tool holders. When the tool bits are in continuous contact with the disk, the separation indicates the thickness which would result from machining the disk. This separation can be compared to a specification to determine whether to machine or discard the disk. A method for machining a disk starts by mounting and aligning the lathe to a wheel hub on which the disk is mounted. The tool bits are each advanced until they are in continuous contact the disk surfaces, when the separation of the tool bits is measured and preferably compared to a specification. When the tool bits are sequentially advanced, variation in the separation can be used to determine depth of cut for each tool bit. A system employing a brake lathe has a microprocessor which receives signals responsive to the separation between the tool bits of the lathe. One or more contact sensors indicate contact of the tool bits with the other tool bit or the brake disk, and the microprocessor can implement instructions to practice the above method. A surface displacement gauge can be employed to allow the system to measure the thickness and lateral run-out of the disk prior to machining.
Owner:BONITA IP

Diamond tool bit bottom surface grinding device

The invention provides a diamond tool bit bottom surface grinding device, which belongs to the technical field of the operation. The problem that the traditional diamond tool bit bottom surface grinding has low production efficiency because of grinding by a common machine tool is solved. The diamond tool bit bottom surface grinding device comprises a rack, wherein the rack is provided with a first grinding mechanism, a transfer discrimination mechanism and a second grinding mechanism, wherein the first grinding mechanism can be used for grinding the certain end surface of a diamond tool bit into a bright surface; the transfer discrimination mechanism can be used for transferring out the diamond tool bit capable of grinding the certain end surface of the diamond tool bit into the bright surface, can be used for judging whether the bright surface is positioned on the bottom surface or a tool surface and enables the diamond tool bit to face to the same direction according to the judgment result; and the second grinding mechanism can be used for bearing the diamond tool bit with the same facing direction of the transfer discrimination mechanism and can be used for grinding the diamond tool bit bottom surface. The diamond tool bit bottom surface grinding device has the advantages of convenience in production, labor force saving, high automation degree and high efficiency. According to the test, the diamond tool bit bottom surface grinding device can be used for grinding ten diamond tool bit bottom surfaces in one minute.
Owner:ZHEJIANG BANNINGER FLUID CONTROL CO LTD
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