UA69021A - Cutter with mechanical fastening of cutting blade - Google Patents

Abstract

Cutter with mechanical fastening of the cutting blade contains bracket, on which are fixed with the possibility of removal the cutting plate with the help of the strap and the sensor of acoustic emission. The sensor of acoustic emission is built in the clamp, in this case between it and the clamp is located the vibroprotective material.

Description

Description of the invention

The invention relates to the field of metal cutting, namely to the construction of cutting tools with 2 simultaneous control of the state of the cutter during the cutting process using acoustic emission.

The cutter with a mechanical attachment of the cutting plate is known to be the closest in terms of technical essence to the invention | see patent 5 Mo 5777231 IPC 501М29/22, publ. 1998), containing a holder on which the cutting plate is fixed with the possibility of removal with the help of a tack, as well as the acoustic emission sensor, while the sensor is made in the form of a thin piezoelectric layer of aluminum nitride applied to the support surface 70 of the cutting plate or on the landing surface of the groove under the plate.

The disadvantages of the described design should be considered as follows: - this arrangement of the acoustic emission sensor is susceptible to parasitic acoustic waves emitted from surfaces other than the cutting plate, which reduces the accuracy of the received acoustic emission signal and makes it impossible to reliably determine the state of the cutter during its operation; 12 - the complex design of the holder due to the presence of additional grooves and holes for placing the wire from the acoustic emission sensor, which increases the cost of the cutter and complicates the requirements for its operation.

The basis of the invention is the task of improving the design of the cutter with a mechanical attachment of the cutting plate, in which due to the fact that the acoustic emission sensor with a vibration protection element is built into the gripper, the main technical result is ensured: increasing the accuracy of the measured acoustic emission signal and simplifying the design of the cutter.

The task is solved by the fact that a cutter with a mechanical attachment of the cutting plate, containing a holder, on which the cutting plate is fixed with the possibility of removal with the help of a tack, as well as an acoustic emission sensor, according to the invention, the acoustic emission sensor is built into the tack, while between it and the tack anti-vibration material is placed, it is optimal when the acoustic emission sensor is elastically "pressed by a clamp in the direction perpendicular to the cutting plate; when an acoustic emission sensor with a round sensitive element is used; the acoustic emission sensor is located in the contour of the cutting plate; the hook has a hole for placing the acoustic emission sensor, the upper end of which has the possibility of interaction with one end of the shaped elastic element, the other end of which is fixed on -- the outer surface of the hook; on the upper end of the clamp there is a groove for placing the wire from the acoustic su emission sensor.

Placing the acoustic emission sensor in the gripper allows measuring acoustic waves as close as possible to the cutting zone and simplifies the design of the holder. Increased accuracy is achieved by the fact that the sensor contacts Ф directly with the cutting plate itself and perceives acoustic emission only through the contact surface. 39 Exclusion of parasitic vibrations is achieved by placing in the gap between the acoustic emission sensor and ee, the attachment of a vibration-proof material (for example, phenoplast), which has sufficient heat resistance and is selected depending on the current processed material; from above, the sensor is pressed by a clamp through an elastic material. The proposed design allows the use of acoustic emission sensors of various types, and it is possible to replace the acoustic emission sensor without disassembling the entire structure. With 50 The simplicity of the design and low cost make it possible to equip metalworking enterprises working in mass production with cutters with acoustic emission sensors for centralized control of the cutting process.

The invention is illustrated by drawings, where Fig. 1 shows a general view of a cutter with a mechanical attachment of the cutting plate, a longitudinal section, Fig. 2 shows a cross-section A-A in Fig. 1, Fig. 3 shows a cross-section B-B in Fig. 1.

The cutter with a mechanical attachment of the cutting plate contains a holder 1, on which the cutting plate 2 is fixed with the possibility of removal with the help of a clamp 3, as well as an acoustic emission sensor 4, which is built into (se) clamp C, while between it and clamp C there is a vibration protection material 5. The cutting plate 2 is placed on the support plate b, which is necessary for the accuracy of the positioning of the cutting plate 2. The acoustic emission sensor 4 is elastically pressed in the direction perpendicular to the cutting plate 2 with the help of ka 20 clamp 7 through the elastic material 8; on the upper end of the clamp C, which is attached to the holder 1 with the help of a screw 9, there is a groove 10 for placing the wire from the acoustic emission sensor 4 and a screw 11 that fixes the clamp 7. The intermediate element 12 in the form of a sphere is required for self-installation of the clamp C and uniform load distribution on the cutting plate 2.

The cutter with a mechanical attachment of the cutting plate works as follows: in the assembled form, 29 is installed and fixed in the cutter holder of the metal cutting machine; the acoustic emission sensor 4 is placed in the clamp 3, c. which allows measuring acoustic waves as close as possible to the cutting zone; the exclusion of parasitic vibrations is achieved by placing in the gap between the acoustic emission sensor 4 and the grip C of the anti-vibration material 5; from above, the acoustic emission sensor 4 is pressed by a clamp 7 through an elastic material 8; the acoustic emission sensor 4 is connected to the diagnostic equipment that controls the cutting process; 60, increased accuracy is achieved by the fact that the acoustic emission sensor 4 is in direct contact with the cutting plate 2 itself and perceives the acoustic emission only through the contact surface. b5 d. d 7

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Claims (6)

The formula of the invention se) o 1. A cutter with a mechanical attachment of the cutting plate, containing a holder on which the cutting plate is fixed with the possibility of removal with the help of a gripper, as well as an acoustic emission sensor, imo) which differs in that the acoustic emission sensor is built into the gripper, while between it and the anti-vibration material is placed with a clamp. 2. A cutter with a mechanical attachment of the cutting plate according to claim 1, which is characterized by the fact that the acoustic emission sensor is elastically pressed by a clamp in the direction perpendicular to the cutting plate. C. A cutter with a mechanical attachment of the cutting plate according to claims 1 or 2, which is characterized by the fact that an acoustic emission sensor with a sensitive element of a round shape is used. » 4. A cutter with a mechanical attachment of the cutting plate according to claims 1-3, which is characterized by the fact that the acoustic emission sensor is located in the contour of the cutting plate. 5. A cutter with a mechanical attachment of the cutting plate according to claims 1-4, which is characterized by the fact that the attachment has a hole for placing the acoustic emission sensor, the upper end of which can interact with one end of the shaped elastic element, the other end of which is fixed on the outer surface grip 6. A cutter with a mechanical attachment of the cutting plate according to any of claims 1-5, which is characterized by the fact that there is a groove on the upper end of the gripper for placing the wire from the acoustic emission sensor. 65 Official Bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2004, M 8, 15.08.2004. State Department of Intellectual Property of the Ministry of Education and