Cutter assembly

Abstract

The utility model relates to the field of cutters, and discloses a cutter assembly which comprises a cutter handle, a cutter head and a positioning rod. A center hole is formed in the center of the tool bit; the end part of the positioning rod is detachably mounted in the centering hole; the tool bit determines the appearance and the center point of the workpiece to be machined through the positioning rod. The tool assembly can improve the positioning precision and reduce the tool changing frequency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cutter field especially relates to a cutter assembly. BACKGROUND

[0002] At present, in the infrared lens processing process, generally is with the way of grinding to the infrared lens processing, uses the numerical control machine tool processing, needs first to adopt the probe subassembly or the trial cutting method to the shape, position of the workpiece to be processed is positioned and establishes the coordinate system, after positioning, the corresponding cutter is replaced to the workpiece to be processed and is ground and is processed. The grinding wheel is installed in the handle through the screw, the grinding wheel and the handle cannot guarantee the complete concentricity, so when the probe positioning is completed, the grinding wheel cutter is replaced for grinding and processing, because the concentricity tolerance exists between the grinding wheel and the handle, the grinding wheel and the established coordinate system also exist certain tolerance, thereby affecting the precision of grinding and processing.

[0003] CN201921217367 discloses a plane chamfering composite cutter, including handle and tool bit, the tool bit is connected to one end of the handle, the tool bit includes first drill milling part and second drill milling part, the second drill milling part is connected with the first drill milling part, the first drill milling part and the second drill milling part are provided with chamfering blade for chamfering processing of the workpiece to be processed. The composite cutter can complete plane milling and chamfering processing, and the number of tool changing is reduced, but positioning is needed before processing by using probe subassembly or trial cutting method, and then the composite cutter is replaced for processing, and during the tool changing process, part of the positioning may be offset.

[0004] The technical problem to be solved by the utility model is how to improve the positioning accuracy and reduce the number of tool changing. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a cutter assembly, by setting the center hole in the center of the tool bit, inserting the positioning rod to position the workpiece to be processed, after positioning, only the positioning rod is taken down, grinding and processing can be carried out, the installation error between the tool bit and the handle is eliminated by this way, and the positioning accuracy is improved.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0007] A cutter assembly, including handle, tool bit, positioning rod, the tool bit is connected on the handle, the center position of the tool bit is provided with the center hole, the end of the positioning rod is detachably installed in the center hole, the tool bit determines the shape and center point of the workpiece to be processed through the positioning rod.

[0008] Preferably, the positioning rod is provided with a connecting block, the connecting block is detachably connected with the center hole in the way of thread cooperation, buckle cooperation or size cooperation.

[0009] Preferably, the tool head is provided with a plurality of mounting holes; the end of the tool shank is provided with threaded holes matched with the mounting holes; the tool head is mounted on the tool shank by screws passing through the mounting holes.

[0010] Preferably, the end of the positioning rod close to the workpiece is a tapered end.

[0011] Preferably, the side surface of the tool head is provided with a first grinding part for grinding the vertical surface of the workpiece, and / or the top of the tool head is provided with a second grinding part for grinding the flat surface of the workpiece.

[0012] Preferably, the side of the first grinding part close to the second grinding part is a chamfering slope for chamfering the workpiece; the second grinding part is an annular grinding edge; the side of the second grinding part away from the first grinding part is provided with a circular arc surface.

[0013] Preferably, the radius of the circular arc surface is 3-5mm.

[0014] Preferably, the second grinding part is provided with a plurality of chip grooves; the plurality of chip grooves are arranged in a circular array on the second grinding part.

[0015] Preferably, the first grinding part is a first grinding part made of bronze; the second grinding part is a second grinding part made of bronze.

[0016] Preferably, the bottom of the tool head is provided with a positioning boss; the tool shank is provided with a groove; the positioning boss and the groove cooperate to limit the movement of the tool head.

[0017] Compared with the prior art, the present scheme has the following beneficial effects:

[0018] The tool assembly of the present case is provided with a centering hole; when positioning the workpiece, the positioning rod is inserted into the centering hole and the workpiece is positioned; after positioning is completed, only the positioning rod needs to be removed without the need to replace the tool; moreover, the centering hole is at the center position of the tool head; during positioning, the positioning point can be guaranteed to be the center point of the tool head, thereby avoiding eccentricity error during installation of the tool head and the tool shank; moreover, during the positioning process, the tool does not need to be replaced, thereby avoiding error generated during tool replacement, and positioning accuracy is improved.

[0019] The tool assembly of the present case can grind the side surface and the flat surface of the workpiece and can also perform chamfering; only one tool setting is needed, the number of tool replacement and positioning is reduced, and processing efficiency is improved.

[0020] The end of the second grinding piece of the tool assembly is provided with a circular arc surface, which can ensure that the edge thickness difference of the infrared lens meets the processing requirements, and the circular arc surface can reduce the contact area between the second grinding piece and the infrared lens, ensure the smoothness of the infrared lens, and avoid edge collapse when grinding from the edge of the infrared lens. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A front view of the tool assembly of Example 1;

[0022] Figure 2 A top view of the tool assembly of Example 1;

[0023] Figure 3 An exploded side view of the tool assembly of Example 1;

[0024] Figure 4 An exploded schematic view of the tool assembly of Example 1.

[0025] Wherein, the shank 1; the head 2; the positioning rod 3; the threaded hole 11; the groove 12; the centering hole 21; the first grinding piece 22; the second grinding piece 23; the chamfer 24; the circular arc surface 25; the chip flute 26; the positioning boss 27; the mounting hole 28; the connecting block 31; the tapered end 32. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Example 1

[0028] Reference Figures 1-4 A tool assembly, comprising a shank 1, a head 2, a positioning rod 3, the head 2 is connected to the shank 1; the center of the head 2 is provided with a centering hole 21; the end of the positioning rod 3 is detachably mounted in the centering hole 21; the head 2 determines the shape and center point of the workpiece to be processed through the positioning rod 3.

[0029] In this embodiment, the tool assembly is applied to the processing of infrared lenses by CNC machine tools, and the CNC machine tools need to position the position and shape of the workpiece before processing.

[0030] The specific use process of the tool assembly is as follows: the shank 1 is connected with the main shaft of the CNC machine tool, before machining, the operator inserts the positioning rod 3 into the centering hole 21, starts the CNC machine tool, and the main shaft drives the positioning rod 3 to move to each side surface of the workpiece to be machined, measures the shape and position of the workpiece to be machined, and calculates the center point of the workpiece to be machined, and obtains the machining path of the workpiece to be machined through these parameters; the operator removes the positioning rod 3 from the tool head 2, and then the workpiece to be machined can be machined.

[0031] In this way, since the centering hole 21 is directly machined on the tool head 2, the concentricity of the centering hole 21 and the tool head 2 is high, and the eccentricity error generated by the installation of the tool head 2 and the shank 1 can be eliminated during positioning.

[0032] Preferably, the positioning rod 3 is provided with a connecting block 31; the connecting block 31 is detachably connected with the centering hole 21 in a threaded cooperation, buckle cooperation or size cooperation manner.

[0033] The threads can be machined in the connecting block 31 and the centering hole 21 for connection, or the fasteners and clamping grooves can be arranged in the connecting block 31 and the centering hole 21 for connection. In the embodiment, the connecting block 31 and the centering hole 21 are machined in a transition fit, and the end of the connecting block 31 is chamfered, so as to facilitate the insertion of the positioning rod 3 into the centering hole 21 and the removal of the positioning rod 3.

[0034] Preferably, the tool head 2 is provided with a plurality of mounting holes 28; the end of the shank 1 is provided with a threaded hole 11 matched with the mounting hole 28; and the tool head 2 is mounted on the shank 1 through the screw passing through the mounting hole 28.

[0035] In the embodiment, the number of mounting holes 28 is three, and the three mounting holes 28 are circumferentially arranged on the tool head 2. After the screw passes through the mounting hole 28, the screw is screwed with the threaded hole 11, so that the tool head 2 is mounted on the shank 1. In this way, after the tool head 2 is worn, only the tool head 2 needs to be replaced instead of the whole tool, thereby reducing the cost.

[0036] Preferably, the end of the positioning rod 3 close to the workpiece to be machined is a tapered end 32. The contact area of the positioning rod 3 and the workpiece to be machined is reduced, and the positioning accuracy is improved.

[0037] Preferably, the side surface of the tool head 2 is provided with a first grinding part 22 for grinding the vertical surface of the workpiece to be machined, and / or the top of the tool head 2 is provided with a second grinding part 23 for grinding the plane of the workpiece to be machined.

[0038] In the embodiment, the first grinding part 22 and the second grinding part 23 are preferably provided simultaneously, and both the first grinding part 22 and the second grinding part 23 are grinding wheels. The tool head 2 can realize grinding of the side surface and the plane of the workpiece to be machined, and the tool does not need to be replaced for multiple times, thereby improving the efficiency. Secondly, the plane of the workpiece to be machined can be machined by the second grinding part 23 first, and after the plane machining is completed, the side surface is machined by taking the machined plane as a reference. The plane and the side surface are machined by one tool, the number of tool replacement is reduced, and the machining precision can be improved.

[0039] Preferably, one side of the first grinding part 22 close to the second grinding part 23 is a chamfering inclined surface 24 for chamfering processing of the workpiece to be machined; the second grinding part 23 is an annular grinding edge; and one side of the second grinding part 23 away from the first grinding part 22 is provided with a circular arc surface 25.

[0040] In the embodiment, the tool can also perform chamfering processing on the workpiece to be machined, and the angle of the chamfering inclined surface is 45°. The second grinding part 23 is used for machining the plane of the workpiece to be machined, and therefore the second grinding part 23 is an annular grinding edge, so as to avoid that the contact area between the second grinding part 23 and the workpiece to be machined is too large and affects the smoothness of the workpiece to be machined. Secondly, the circular arc surface 25 is arranged on the top of the second grinding part 23, so as to further reduce the contact area with the workpiece to be machined, and the structural strength of the second grinding part 23 can be ensured.

[0041] Preferably, the radius of the circular arc surface 25 is 3-5 mm.

[0042] In the embodiment, the radius of the circular arc surface 25 is preferably 4 mm, and other values can also be set according to actual conditions.

[0043] Preferably, the second grinding part 23 is provided with a plurality of chip grooves 26; and the plurality of chip grooves 26 are arranged in a circular array on the second grinding part 23.

[0044] In the embodiment, the second grinding part 23 is provided with the chip groove 26, and the chip groove 26 is at an angle of 45° with the horizontal line, so as to facilitate the discharge of the waste generated by grinding out of the tool.

[0045] Preferably, the first grinding part 22 is a first grinding part 22 made of bronze; and the second grinding part 23 is a second grinding part 23 made of bronze. The bronze material has good wear resistance and high precision, and is suitable for machining of the outer red lens.

[0046] Preferably, the bottom of the tool head 2 is provided with a positioning boss 27; the tool handle 1 is provided with a groove 12; and the positioning boss 27 and the groove 12 cooperate to limit the movement of the tool head 2.

[0047] In the embodiment, when the tool bit 2 is installed on the tool handle 1, the positioning boss 27 is first aligned with the groove 12 and inserted into the groove 12, and then the tool bit 2 and the tool handle 1 are fixed, in this way, the concentricity of the tool bit 2 and the tool handle 1 is improved.

[0048] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A tool assembly, characterized in that The utility model relates to a cutter handle, cutter head and positioning rod, the cutter head is connected on the cutter handle, the center position of the cutter head is equipped with the centering hole, the end of the positioning rod is detachably installed in the centering hole, and the cutter head determines the shape and center point of the workpiece to be processed through the positioning rod.

2. The knife assembly of claim 1, wherein, The positioning rod is equipped with a connecting block, and the connecting block is detachably connected with the centering hole through thread cooperation, buckle cooperation or size cooperation.

3. The knife assembly of claim 1, wherein, The cutter head is equipped with a plurality of mounting holes, the end of the cutter handle is equipped with a threaded hole matched with the mounting hole, and the cutter head is installed on the cutter handle through the screw passing through the mounting hole.

4. The knife assembly of claim 1, wherein, The end of the positioning rod close to the workpiece to be processed is a tapered end.

5. The knife assembly of claim 1, wherein, The bottom of the cutter head is equipped with a positioning boss, the cutter handle is equipped with a groove, and the positioning boss and the groove are matched to limit the movement of the cutter head.

6. The knife assembly of claim 1, wherein, The side surface of the cutter head is equipped with a first grinding part for grinding the vertical surface of the workpiece to be processed, and / or the top of the cutter head is equipped with a second grinding part for grinding the plane of the workpiece to be processed.

7. The knife assembly of claim 6, wherein, The side of the first grinding part close to the second grinding part is a chamfering inclined surface for chamfering the workpiece to be processed, the second grinding part is an annular grinding edge, and the side of the second grinding part away from the first grinding part is equipped with a circular arc surface.

8. The knife assembly of claim 7, wherein, The radius of the circular arc surface is 3-5mm.

9. The knife assembly of claim 7, wherein, The second grinding part is equipped with a plurality of chip grooves, and the plurality of chip grooves are circumferentially arranged on the second grinding part.

10. The knife assembly of claim 7, wherein, The first grinding part is made of bronze, and the second grinding part is made of bronze.

Images