CN106378709A - Clamp applied to plane polishing of front blade surfaces of hard alloy blades - Google Patents

Abstract

The invention relates to a plane polishing jig, and discloses a jig for plane polishing the rake face of a hard alloy blade, comprising a fixed ring, a blade chucking disc and a magnet, the magnet is fixed in the blade chucking disc, and the blade chucking disc is installed In the fixed ring, a blade installation hole matching the shape of the hard alloy blade is arranged on the lower surface of the blade chucking disc, and the depth of the blade installation hole is smaller than the thickness of the cemented carbide blade. The present invention utilizes magnets to absorb and fix the cemented carbide blade installed in the blade mounting hole in the blade chucking disk, and under the attraction of the magnet, it can prevent the cemented carbide blade from being removed from the blade chucking disk during the process of handling or plane polishing. Falling off; realize the fast clamping and accurate positioning of the carbide insert, which can effectively improve the polishing accuracy, polishing efficiency and surface quality of the carbide insert rake face, thereby prolonging the service life of the insert, improving the processing quality of the parts, and reducing the overall production cost .

Description

A fixture for the rake face of a plane-polished carbide insert

technical field

The invention relates to a plane polishing jig, in particular to a plane polishing jig for the rake face of a cemented carbide blade.

Background technique

The tool is the "teeth" of the machine tool, and the main factor affecting the cutting performance and tool life of the tool. In addition to the tool material, tool geometric parameters, tool structure, cutting amount, etc., the surface finish of the tool is also a very important factor. Cemented carbide cutting tools use carbide (WC, TiC) micron-sized powders of high-hardness refractory metals as the hard phase, cobalt (Co) or nickel (Ni), and molybdenum (Mo) as the binder phase. Powder metallurgy products sintered in furnace or hydrogen reduction furnace. At present, the final machining process of the rake face of cemented carbide inserts mainly adopts diamond grinding wheel grinding, but the grinding process causes thermal deformation, grinding burns and surface/sub-surface damage (such as: deformed layer, surface/subsurface) of the rake face. Subsurface cracks, residual stress, etc.) and other defects, and there are microscopic notches of different degrees. The microscopic notches are generally 0.01-0.05mm, and the severe ones are as high as 0.1mm or more. Tool wear and damage. The planar polishing technology has the advantages of good surface quality, no surface/subsurface damage, low surface defect density, high material removal rate, and low cost. It has been widely used in Al, Cu, W and other metals and their alloy materials. Precision and ultra-precision machining. Therefore, the application of plane polishing technology to polish the rake face of the carbide insert can effectively improve the polishing accuracy, polishing efficiency and surface quality of the rake face of the carbide insert, and reduce the friction between chips and the rake face of the insert, thereby It reduces the wear of the blade, prolongs the service life of the carbide blade, improves the processing quality of the parts, and reduces the overall production cost. However, the current surface polishing machine mainly uses paraffin bonding, super glue bonding, and vacuum suction cup adsorption to fix the workpiece on the surface. Datum fixture plate. Using paraffin adhesives and super glue adhesives for bonding, it is time-consuming to peel off and clean, and the adhesives have a great impact on the cleanliness of the workpiece. When the rake face of the cemented carbide blade is polished on a plane polishing machine, the fixing mainly uses an adhesive and a vacuum suction cup to fix one rake face of the cemented carbide blade, and then polishes the other rake face. If the vacuum suction cup adsorption method is used to fix, not only the cost is high, but also the blade lacks positioning in the circumferential direction, and the surface area of the carbide blade is less and is not easy to be sucked tightly, causing the blade to fall off and affecting the polishing quality of the rake face of the blade. Moreover, when polishing multiple blades at the same time, the fixed position of multiple blades on the reference fixture plate is determined by the experience of the operator. This method is not accurate and greatly affects the polishing quality of the rake face of the cemented carbide blade. consistency. Therefore, the development and design of a fixture for the rake face of a planar polished carbide insert, which makes disassembly convenient and accurate in positioning, has become an urgent need for efficient ultra-precision production and processing of carbide inserts.

Contents of the invention

The object of the present invention is to provide a fixture for the rake face of a planar polished cemented carbide insert, to solve the problems in the prior art above, to realize fast clamping and accurate positioning of the cemented carbide insert, and to improve the cutting edge of the cemented carbide insert. Improve the polishing accuracy, polishing efficiency and surface quality of the knife face, thereby prolonging the service life of the carbide insert, improving the processing quality of the parts, and reducing the overall production cost.

To achieve the above object, the present invention provides the following scheme:

The invention provides a fixture for the rake face of a planar polished hard alloy blade, which includes a fixed ring, a blade chucking disk and a magnet, the magnet is fixed in the blade chucking disk, and the blade chucking disk is installed on the In the fixing ring, a blade installation hole matching the shape of the cemented carbide blade is provided on the lower surface of the blade clamping plate, and the depth of the blade installation hole is smaller than the thickness of the cemented carbide blade.

Preferably, a counterweight is also included, and the counterweight is installed in the fixing ring and located above the magnet.

Preferably, the magnet is installed and fixed in the blade chucking disk by screws, and the diameter of the outer wall of the magnet is the same as the diameter of the inner wall of the blade chucking disk.

Preferably, a central boss is provided at the center of the upper surface of the blade clamping disc, and a counterbore matching the central boss is provided at the center of the magnet, and the diameter of the counterbore is the same as that of the central boss. The outer diameters are the same, the countersunk hole is a through hole, the upper surface of the central boss is provided with a threaded hole matching the screw, and the screw is installed in the countersunk hole and the threaded hole, A washer is arranged between the screw and the magnet.

Preferably, there are multiple blade installation holes, and the blade installation holes are through holes uniformly arranged along the circumference of the blade chucking disc.

Preferably, the depth of the blade installation hole is 1/2˜2/3 of the thickness of the blade.

Preferably, the upper surface of the blade chucking disc is provided with a plurality of first positioning bosses along the circumferential direction, and the lower surface of the magnet is provided with a plurality of first positioning bosses matched with the first positioning bosses along the circumferential direction. A positioning cavity, and the number of the first positioning boss is the same as that of the first positioning cavity.

Preferably, the lower surface of the counterweight is provided with a plurality of second positioning bosses along the circumferential direction, and the upper surface of the magnet is provided with a plurality of second positioning bosses matched with the second positioning bosses along the circumferential direction. The cavity is positioned, and the number of the second positioning boss is the same as that of the second positioning cavity.

Preferably, there are four first positioning bosses, which are evenly arranged along the circumferential direction of the upper surface of the blade chucking disc.

Preferably, there are four second positioning bosses, which are evenly arranged along the circumferential direction of the lower surface of the counterweight.

Compared with the prior art, the present invention has achieved the following technical effects:

The fixture for the rake face of the planar polished hard alloy insert provided by the present invention can process the hard alloy insert as follows: the rake angle is 0°, the rake face does not have a chip breaker, and the bonding phase in the insert material can be magnetized Attracts cobalt (Co) and nickel (Ni). A magnet is installed and fixed in the blade chucking disk, and a blade mounting hole matching the shape of the carbide blade is provided on the lower surface of the blade chucking disk, and the carbide blade installed in the blade mounting hole is adsorbed and fixed by a magnet In the insert clamping disc, under the attraction of the magnet, it can prevent the carbide inserts from falling out of the insert clamping disc during the process of handling or plane polishing; it realizes the fast clamping and accurate positioning of the carbide inserts, which can effectively Improve the polishing accuracy, polishing efficiency and surface quality of the rake face of the cemented carbide insert, thereby prolonging the service life of the insert, improving the processing quality of the parts, and reducing the overall production cost.

Further, a counterweight is arranged above the magnet, and an appropriate counterweight can be selected according to the requirements of the polishing pressure. Properly increasing the polishing pressure can increase the friction between the abrasive material and the polishing pad on the cemented carbide blade, and improve the hardness of the cemented carbide blade. material removal rate.

Further, a plurality of first positioning bosses are arranged on the upper surface of the blade clamping disc along the circumferential direction, and a plurality of second positioning bosses are arranged on the lower surface of the counterweight along the circumferential direction, and the lower surface and the upper surface of the magnet A plurality of first positioning cavities matching the first positioning bosses and a plurality of second positioning cavities matching the second positioning bosses are respectively provided along the circumferential direction, which can be used to prevent the clamping of the magnet and the blade Circumferential sliding of the discs and prevention of circumferential sliding of the weights and magnets.

Further, a washer is arranged between the screw and the magnet to increase the contact area between the screw and the magnet, so as to prevent the surface of the magnet from being damaged by the friction of the screw.

Further, the depth of the insert mounting hole is 1/2 to 2/3 of the thickness of the insert, which can ensure that the polishing requirement is met and at the same time realize the stable fixation of the cemented carbide insert.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is the front view of the fixture of the rake face of plane polishing cemented carbide insert of the present invention;

Fig. 2 is the bottom view of the fixture of the rake face of the plane polished cemented carbide insert of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of A-A direction in Fig. 2;

Fig. 4 is the front view that the clamp of the present invention planar polishing cemented carbide blade rake face is installed on the polishing machine;

Fig. 5 is the plan view that the fixture of the rake face of the planar polished cemented carbide blade of the present invention is installed on the polishing machine;

In the figure: 1-tungsten carbide blade, 2-fixing ring, 3-blade clamping plate, 31-center boss, 32-first positioning boss, 4-magnet, 5-gasket, 6-screw, 7 - counterweight, 71 - second positioning boss, 8 - cage, 9 - roller, 10 - polishing pad, 11 - polishing machine.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The object of the present invention is to provide a fixture for the rake face of a planar polished cemented carbide insert, to solve the problems in the prior art above, to realize fast clamping and accurate positioning of the cemented carbide insert, and to improve the cutting edge of the cemented carbide insert. Improve the polishing accuracy, polishing efficiency and surface quality of the knife face, thereby prolonging the service life of the carbide insert, improving the processing quality of the parts, and reducing the overall production cost.

The invention provides a fixture for the rake face of a planar polished hard alloy blade, which comprises a fixed ring, a blade clamping plate and a magnet, the magnet is installed and fixed in the blade clamping plate, the blade clamping plate is installed in the fixed ring, and the blade is mounted A blade installation hole matching the shape of the hard alloy blade is arranged on the lower surface of the chuck, and the depth of the blade installation hole is smaller than the thickness of the cemented carbide blade.

The fixture for the rake face of the planar polished hard alloy insert provided by the present invention requires that the hard alloy insert that can be processed is: the rake angle is 0°, the rake face does not have a chip breaker, and the bonding phase in the insert material can be Cobalt (Co) and Nickel (Ni) attracted by a magnet. A magnet is installed and fixed in the blade chucking disk, and a blade mounting hole matching the shape of the carbide blade is provided on the lower surface of the blade chucking disk, and the carbide blade installed in the blade mounting hole is adsorbed and fixed by a magnet In the insert clamping disc, under the attraction of the magnet, it can prevent the carbide inserts from falling out of the insert clamping disc during the process of handling or plane polishing; it realizes the fast clamping and accurate positioning of the carbide inserts, which can effectively Improve the polishing accuracy, polishing efficiency and surface quality of the rake face of the cemented carbide insert, thereby prolonging the service life of the insert, improving the processing quality of the parts, and reducing the overall production cost.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one

This embodiment provides a fixture for the rake face of a planar polished hard alloy blade, as shown in Figures 1, 2, and 3, including a fixed ring 2, a blade clamping disc 3 and a magnet 4, and the magnet 4 is installed and fixed on the blade clamping In the disk 3, the blade clamping disk 3 is installed in the fixed ring 2, and the lower surface of the blade clamping disk 3 is provided with a blade installation hole matching the shape of the carbide blade 1, and the depth of the blade installation hole is smaller than that of the carbide blade. 1 thickness.

The fixture of the rake face of the planar polished cemented carbide insert provided in this embodiment, the cemented carbide insert that can be processed is: the rake angle is 0°, the rake face does not have a chip breaker, and the bonding phase in the insert material can be Cobalt (Co) and Nickel (Ni) attracted by a magnet. A magnet 4 is installed and fixed in the blade chucking disc 3, and the material of the magnet 4 is a strong magnetic material, and a blade mounting hole matching the shape of the cemented carbide blade 1 is provided on the lower surface of the blade chucking disc 3, and the magnet 4 is used to The cemented carbide blade 1 installed in the blade mounting hole is adsorbed and fixed in the blade chucking disc 3, and under the attraction of the magnet 4, it can prevent the cemented carbide blade 1 from the blade chucking disc 2 in the process of handling or plane polishing. fall off in the middle; realize the fast clamping and accurate positioning of the carbide insert 1, which can effectively improve the polishing accuracy, polishing efficiency and surface quality of the carbide insert 1 rake face, thereby prolonging the life of the carbide insert 1 and improving the The processing quality of its parts is improved, and the overall production cost is reduced.

The magnet 4 exerts a certain polishing pressure on the cemented carbide blade 1 during the polishing process of the cemented carbide blade 1 , and at the same time adsorbs and fixes the cemented carbide blade 1 on the blade chucking disk 3 .

As a preferred embodiment, the fixture for the rake face of the planar polished carbide insert provided in this embodiment further includes a counterweight 7 installed in the fixed ring 2 and located above the magnet 4 . The appropriate counterweight 7 can be selected according to the requirements of the polishing pressure. Properly increasing the polishing pressure can increase the frictional force of the abrasive material and the polishing pad 10 on the cemented carbide blade 1 and improve the material removal rate of the cemented carbide blade 1 . The magnet 4 is installed and fixed in the blade chucking disk 3 by the screw 6, and the outer wall diameter of the magnet 4 is the same as the inner wall diameter of the blade chucking disk 3, and the installation is firm.

The center of the upper surface of the blade chucking disc 3 is provided with a central boss 31, and the center of the magnet 4 is provided with a countersunk hole matched with the central boss 31. The outer diameter is the same, the central boss 31 can axially locate the magnet; the upper surface of the central boss 31 is provided with a threaded hole matching the screw 6, and the screw 6 is installed in the countersunk hole and the threaded hole, so that the magnet 4 is installed Fixed in the blade clamping disc 3, a gasket 5 is arranged between the screw 6 and the magnet 4, the gasket 5 is a soft gasket, preferably a rubber gasket or a plastic gasket, which can increase the contact area and prevent the surface of the magnet 4 from Damaged by screw 6 friction.

There are multiple blade mounting holes, and each blade mounting hole is a through hole, which realizes the rapid clamping and accurate positioning of multiple carbide blades 1; the blade mounting holes are evenly arranged along the circumference of the blade clamping plate 3, ensuring The uniformity and stability of polishing; the magnet 4 can firmly absorb the cemented carbide blade 1 and fix the cemented carbide blade 1 in the installation space formed by the magnet 4 and the blade chucking disc 3 .

The depth of the blade mounting hole is 1/2 to 2/3 of the thickness of the carbide blade 1, which can prevent the blade chucking disc 3 from contacting the polishing pad 10, and the polishing liquid during the polishing process will not enter the blade chucking disc 3 In the process, the polishing liquid is avoided from corroding the insert chucking plate 3; while ensuring that the polishing requirements are met, the solid fixing of the cemented carbide insert 1 is realized.

The upper surface of the blade chucking disc 3 is arranged with a plurality of first positioning bosses 32 along the circumferential direction. In this embodiment, the first positioning bosses 32 are preferably set as four cylindrical bosses, and along the blade chucking disc 3 The upper surface is uniformly arranged in the circumferential direction.

The lower surface of the magnet is provided with a plurality of first positioning cavities matching the first positioning bosses 32 along the circumferential direction. In this embodiment, the first positioning cavities are preferably set to 4 in the shape of each first positioning boss 32. The cylindrical cavities with matching sizes can be used to prevent the magnet 4 and the blade clamping disc 3 from slipping in the circumferential direction.

The lower surface of the counterweight 7 is arranged with a plurality of second positioning bosses 71 along the circumferential direction. In this embodiment, the second positioning bosses 71 are preferably set as four cylindrical bosses, and along the lower surface of the counterweight 7 Evenly distributed in the circumferential direction.

The upper surface of the magnet 7 is provided with a plurality of second positioning cavities matched with the second positioning boss 71 along the circumferential direction. In this embodiment, the second positioning cavity is preferably set to 4 with the shape of each second positioning boss 32. The cylindrical cavities with matching sizes can be used to prevent the counterweight 7 and the magnet 4 from slipping in the circumferential direction.

Use the fixture of the plane polishing cemented carbide blade rake face in this embodiment to be installed on the polishing machine to polish the cemented carbide blade 1, as shown in Figures 4 and 5, first, the cage 8 is fixed on the polishing machine 11, The fixed ring 2 is placed in the cage 8, the lower surface of the fixed ring 2 is in contact with the polishing pad 10 on the polishing machine, and the circumferential direction of the fixed ring 2 is in contact with the roller 9 on the cage 8. The cage 8 is installed on the polishing machine and is used to determine the position of the blade chucking disc 3 on the polishing pad 10. During the polishing process, the roller 9 is positioned on the cemented carbide blade 1, the blade chucking disc 3, the magnet 4 and the counterweight 7. Play a guiding role in the rotation process, the polishing pad 10 is in contact with the cemented carbide blade 1, and the polishing of the rake face of the cemented carbide blade 1 is realized under the action of the polishing liquid.

Then the magnet 4 is fixedly installed in the blade chucking disk 3, and the cemented carbide blade 1 is installed in the blade mounting hole that the lower surface of the blade chucking disk 3 has the same outline as the carbide blade, and is in contact with the lower surface of the magnet 4. Contact, so that under the attraction of the magnet 4, it can prevent the cemented carbide blade 1 from falling off from the blade chucking disk 3 during the handling process; then place the blade chucking disk 3, magnet 4 together with the installed cemented carbide blade 1 in the fixed ring 2; finally, the counterweight 7 is installed on the upper surface of the magnet 4 according to the requirement of the polishing pressure.

When starting the polishing machine 1, under the action of the frictional force between the lower surface of the fixed ring 2, the hard alloy blade 1 and the polishing pad 10 on the polishing machine 1, the fixed ring 2, the blade chucking disc 3, the counterweight 7 , The magnet 4 and the hard alloy blade 1 rotate in the cage 8 at a certain speed, and the roller 9 guides its rotation, and there is relative motion between the polishing pad 10 and the clamp on the rake face of the hard alloy blade for plane polishing, and exerts With a certain amount of polishing liquid, the polishing process of the rake face of the cemented carbide insert 1 can be realized.

In the present invention, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to the present invention The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A fixture for the rake face of a planar polished hard alloy blade, characterized in that: comprise a retaining ring, a blade chucking disc and a magnet, the magnet is fixed in the blade chucking disc, and the blade chucking disc Installed in the fixed ring, a blade installation hole matching the shape of the carbide blade is provided on the lower surface of the blade chucking plate, and the depth of the blade installation hole is smaller than the thickness of the cemented carbide blade. 2. The clamp for the rake face of a planar polished cemented carbide insert according to claim 1, further comprising a counterweight, the counterweight is installed in the fixed ring and is located above the magnet . 3. The fixture for the rake face of a planar polished hard alloy blade according to claim 1, wherein the magnet is installed and fixed in the blade chucking disk by screws, and the diameter of the outer wall of the magnet is the same as that of the The inner walls of the insert chucks have the same diameter. 4. The fixture for the rake face of a planar polished cemented carbide blade according to claim 3, characterized in that: a center boss is arranged at the center of the upper surface of the blade clamping plate, and a center boss is arranged at the center of the magnet to match the center of the center. A counterbore matching the boss, the diameter of the counterbore is the same as the outer diameter of the center boss, the counterbore is a through hole, and the upper surface of the center boss is provided with a Matching threaded holes, the screws are installed in the countersunk holes and the threaded holes, and gaskets are arranged between the screws and the magnets. 5. The fixture for the rake face of a planar polished cemented carbide blade according to claim 1, wherein there are multiple mounting holes for the blade, and the mounting holes for the blade are along the circumference of the blade clamping disc. to evenly spaced vias. 6 . The fixture for the rake face of a planar polished cemented carbide insert according to claim 1 , wherein the depth of the insert mounting hole is 1/2 to 2/3 of the thickness of the insert. 7 . 7. The fixture for the rake face of a planar polished hard alloy blade according to claim 1, characterized in that: the upper surface of the blade clamping disc is provided with a plurality of first positioning bosses along the circumferential direction, and the magnet A plurality of first positioning cavities matching the first positioning bosses are provided on the lower surface along the circumferential direction, and the number of the first positioning bosses is the same as that of the first positioning cavities. 8. The fixture for the rake face of a planar polished hard alloy blade according to claim 2, characterized in that: the lower surface of the counterweight is arranged with a plurality of second positioning bosses along the circumferential direction, and on the magnet A plurality of second positioning cavities matching the second positioning bosses are provided on the surface along the circumferential direction, and the number of the second positioning bosses is the same as that of the second positioning cavities. 9. The fixture for the rake face of a planar polished cemented carbide insert according to claim 7, characterized in that: four first positioning bosses are provided, and are located along the circumferential direction of the upper surface of the insert chucking plate. Spread evenly. 10. The fixture for the rake face of a planar polished cemented carbide insert according to claim 8, wherein there are four second positioning bosses, which are evenly distributed along the circumferential direction of the lower surface of the counterweight. layout.