阅读说明：本技术 一种渐开线圆柱齿轮棱边倒角加工刀具 (Involute cylindrical gear edge chamfering machining tool ) 是由 胡建 于 2020-07-30 设计创作，主要内容包括：本发明提供了一种渐开线圆柱齿轮棱边倒角加工刀具,包括圆柱形刀体,所述圆柱形刀体的一端为刀柄,另一端焊接一刀头,所述刀头的根部为圆柱形,切削部为多面椎体,所述切削部包括切削刃、排屑槽、前刀面、后刀面、副后刀面,所述切削部的锥尖位于圆柱形根部的轴心线上,以所述切削部的锥尖为对称中心,设有两个互为中心对称的切削刃,该两个切削刃在切削部的锥尖形成一夹角,所述切削刃的顺时针方向的断面为前刀面,所述前刀面与刀具的安装基面之间存在一前角,所述切削刃的逆时针方向依次为后刀面、副后刀面,所述后刀面与切削刃的切削平面之间存在一后角,所述副后刀面与前刀面之间存在一副后角,该副后刀面与前刀面之间设有排屑槽。(The invention provides an involute cylindrical gear edge chamfering machining tool which comprises a cylindrical tool body, wherein one end of the cylindrical tool body is a tool handle, the other end of the cylindrical tool body is welded with a tool bit, the root of the tool bit is cylindrical, a cutting part is a multi-face cone, the cutting part comprises a cutting edge, a chip groove, a front tool face, a rear tool face and an auxiliary rear tool face, the cone tip of the cutting part is positioned on the axis of the cylindrical root, the cone tip of the cutting part is taken as a symmetrical center, two cutting edges which are mutually centrosymmetric are arranged, an included angle is formed between the cone tips of the cutting part by the two cutting edges, the section of the cutting edge in the clockwise direction is a front tool face, a front angle is formed between the front tool face and an installation base surface of the tool, the cutting edge in the anticlockwise direction is the rear tool face and the auxiliary rear tool face, and a rear angle, and a secondary back angle is formed between the secondary back cutter face and the front cutter face, and a chip removal groove is formed between the secondary back cutter face and the front cutter face.)

1. The utility model provides an involute cylindrical gear edge chamfer processing cutter, includes cylindrical cutter body (200), its characterized in that: the one end of cylindrical cutter body (200) is handle of a knife (220), and another end welding tool bit (210), the root of tool bit (210) is cylindrical, and the cutting part is the multiaspect centrum, the cutting part includes cutting edge (211), chip groove (212), rake face (213), flank face (214), vice flank face (215), the awl point (216) of cutting part is located the axis of cylindrical root, with the awl point (216) of cutting part is symmetry center, is equipped with two cutting edges (211) that are centrosymmetric each other, and this two cutting edges (211) form an contained angle (alpha) at the awl point (216) of cutting part, the section of the clockwise of cutting edge (211) is rake face (213), there is a rake angle (beta) between rake face (213) and the installation base face (300) of cutter, the anticlockwise of cutting edge (211) is flank face (214) in proper order, And a minor flank surface (215), wherein a clearance angle (gamma) exists between the flank surface (214) and the cutting plane (310) of the cutting edge (211), a minor clearance angle () exists between the minor flank surface (215) and the rake surface (213), and a chip groove (212) is provided between the minor flank surface (215) and the rake surface (213).

2. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the tool holder (220) is made of a common carbon tool steel material T10, and the tool bit (210) is made of a hard alloy material YT 5.

3. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the included angle (alpha) formed by the two cutting edges (211) is 60 degrees.

4. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the rake angle (beta) existing between the rake face (213) and the mounting base surface (300) of the tool is-6 degrees.

5. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: a clearance angle (gamma) between the clearance surface (214) and the cutting plane of the cutting edge (211) is 16 degrees.

6. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the side clearance () between the side clearance surface (215) and the rake surface (213) is 22 degrees.

7. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the included angle between the front cutter surface (213) and the rear cutter surface (214) is 70 degrees, and the included angle between the rear cutter surface (214) and the auxiliary rear cutter surface (215) is 120 degrees.

8. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the cutter handle is characterized in that a tangent plane (221) for axial fixation is arranged at the end of the cutter handle (220), and a chamfer (222) is arranged at the edge of the end part of the cutter handle (220).

9. The involute cylindrical gear edge chamfering machining tool as claimed in claim 1, wherein: the flutes (212) are arranged to turn clockwise.

Technical Field

The invention relates to the field of processing of involute cylindrical gears, in particular to a tool for processing an edge chamfer of an involute cylindrical gear.

Background

At present, in the field of involute cylindrical gear processing, edge chamfering processing of involute cylindrical gears mainly adopts an edge milling process, wherein a profile modeling processing method is adopted for edge milling, a cutter bar is in line contact with a tooth surface under the action of 0.4-0.6MPa air pressure, a cutter and the cutter bar move synchronously, and meanwhile, a main shaft of the cutter rotates to cut the outline of the gear, so that the chamfering effect is achieved. The existing edge milling cutter mainly adopts the structural design that an indexable diamond-shaped blade is connected with a cutter bar through a screw (as shown in the figure), and the following problems can occur in the actual use process of the cutter structure: firstly, the blade and the cutter bar are connected by a screw, so that the limiting surfaces on the blade and the cutter bar are smaller, the blade is subjected to the action of cutting force in the cutting process, the risk of loosening is generated, particularly, when the cutting allowance is increased, the cutting force on the blade is also increased, the risk of loosening of the blade is increased, and as the blade is loosened, the processing angle of the blade is deviated in processing, so that the chamfer size of a processed product is inconsistent, and the chamfer surface has a step phenomenon; secondly, because the edge of the processing gear and not allowing the chamfer to interfere with the tooth surface, the connection screw of the blade and the cutter bar is smaller due to the limitation of space, the effective connection screw thread only has 4 teeth, the thread connection strength is not enough, the phenomenon of screw breakage often occurs due to the influence of cutting force in the processing process, the broken screw part is embedded into the cutter bar through hole, the extraction is difficult, the whole cutter bar is scrapped, and the service life of the cutter is very short.

Disclosure of Invention

The invention aims to provide a tool for processing an edge chamfer of an involute cylindrical gear, which can realize the edge chamfer processing of the involute cylindrical gear, eliminate the risk of loosening of a blade, solve the problems of tool processing angle deviation caused by loosening of the blade, inconsistent size of a processed gear chamfer and step generation of a chamfer surface and solve the problem of short service life of the tool.

The technical scheme of the invention is as follows: the utility model provides an involute cylindrical gear edge chamfer processing cutter, includes cylindrical cutter body, the one end of cylindrical cutter body is the handle of a knife, and another end welding tool bit, the root of tool bit is cylindrical, and the cutting part is the multiaspect centrum, the cutting part includes cutting edge, chip groove, rake face, back knife face, vice back knife face, the awl point of cutting part is located cylindrical root's axis, use the awl point of cutting part is the symmetry center, is equipped with two cutting edges that are centrosymmetric each other, and these two cutting edges form an contained angle at the awl point of cutting part, the section of the clockwise of cutting edge is the rake face, there is a rake angle between the installation base face of rake face and cutter, the counter-clockwise of cutting edge is back knife face, vice back knife face in proper order, there is a relief angle between the cutting plane of back knife face and cutting edge, there is a back angle between vice back knife face and the rake face, a chip groove is arranged between the auxiliary rear cutter face and the front cutter face.

The knife handle is made of a common carbon tool steel material T10, and the knife head is made of a hard alloy material YT 5.

The included angle formed by the two cutting edges is 60 degrees.

The rake angle existing between the rake face and the mounting base of the tool is-6 degrees.

The clearance angle existing between the flank face and the cutting plane is 16 degrees.

The side relief angle between the side relief surface and the rake surface is 22 degrees.

The included angle between the front cutter face and the rear cutter face is 70 degrees, and the included angle between the rear cutter face and the auxiliary rear cutter face is 120 degrees.

The cutter handle end is provided with a cutting plane for axial fixation, and the edge of the end part of the cutter handle is provided with a chamfer.

The chip groove is set to turn clockwise.

Adopt above-mentioned technical scheme: the utility model provides an involute cylindrical gear edge chamfer processing cutter, includes cylindrical cutter body, the one end of cylindrical cutter body is the handle of a knife, and another end welding tool bit, the root of tool bit is cylindrical, and the cutting part is the multiaspect centrum, the cutting part includes cutting edge, chip groove, rake face, back knife face, vice back knife face, the awl point of cutting part is located cylindrical root's axis, use the awl point of cutting part is the symmetry center, is equipped with two cutting edges that are centrosymmetric each other, and these two cutting edges form an contained angle at the awl point of cutting part, the section of the clockwise of cutting edge is the rake face, there is a rake angle between the installation base face of rake face and cutter, the counter-clockwise of cutting edge is back knife face, vice back knife face in proper order, there is a relief angle between the cutting plane of back knife face and cutting edge, there is a back angle between vice back knife face and the rake face, a chip groove is arranged between the auxiliary rear cutter face and the front cutter face. When in use, the cutter handle of the cutter is inserted into a cutter mounting hole of a numerical control edge milling machine tool, an involute cylindrical gear needing chamfering is mounted on a workbench of the machine tool, then the mounting angle of the cutter is adjusted, the central axis of the cutter and the central axis of a gear needing to be processed form a mounting included angle on the same plane, the size of the mounting included angle is mainly determined by the spiral angle of the gear to be processed and the included angle of two cutting edges of the cutter, the mounting angle and the cutting-in depth of the cutter can be adjusted according to the angle and the size of a desired chamfering surface, the cutter is fixed after the mounting included angle is determined, the cutting edge of the cutter is aligned to the chamfering surface of the gear to be processed, the cutting edge of the cutter is tangent to the chamfering surface of the gear to be processed, a cutting surface is formed, the feeding depth of the cutter is adjusted, and the condition that the rest parts of the cutter cannot interfere with the rest parts of the, therefore, the preparation work before chamfering the gear is finished, in the machining process, the cutter rotates clockwise around the axis of the cutter, the machined gear rotates reversely around the axis of a machine tool workbench, and the cutting part of the cutter applies cutting acting force to the gear to gradually cut off the chamfering allowance of the edge of the machined gear.

The rake angle between the rake face and the mounting base surface of the cutter is-6 degrees, and the design of a negative rake angle is adopted, so that the strength of a cutting edge can be improved, and the service life of the cutter is prolonged.

The relief angle that exists between flank and the cutting plane is 16 degrees, avoids interfering under the condition, adopts the design of less relief angle, can promote the tightness of cutting edge to increase the thermal diffusivity, promote cutter life.

The side relief angle between the side relief tool face and the front tool face is 22 degrees, so that the interference between the tool and the machined part in the cutting machining process can be avoided.

The chip groove is set to clockwise turn, and the design that clockwise turns to is favorable to the iron fillings after the direction excision to be smoothly discharged.

This roller gear edge chamfer processing cutter's stable in structure, it has realized the processing of cutter to the roller gear edge chamfer that gradually bursts at seams, welding design through tool bit and handle of a knife, the cutter processing angular deflection who produces because the tool bit takes place the pine when gear chamfer processing has been solved, gear chamfer size after the processing is inconsistent, gear chamfer face produces the problem of step, negative rake angle when the contained angle through each knife face and cutter installation, the relief angle, vice relief angle design, the intensity of tool bit has been promoted, the problem that the tool bit has the rupture risk because of the atress is too big has been solved, the life of cutter has been increased.

The invention is further described with reference to the drawings and the specific embodiments in the following description.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a cross-sectional view of the cutting portion of FIG. 2 taken along line A-A;

fig. 5 is a schematic view of the present invention in use.

In the drawings: 100 is a gear, 110 is a helical angle of the gear, 120 is a chamfered surface of the gear, 200 is a cutter body, 210 is a cutter head, 211 is a cutting edge, 212 is a chip groove, 213 is a rake face, 214 is a flank face, 215 is a secondary flank face, 216 is a cutting part conical tip of the cutter head, 220 is a cutter handle, 221 is a cutting plane, 222 is a cutter handle chamfer, 300 is a cutter mounting base face, 310 is a cutting plane of the cutter, α is an included angle between two cutting edges, β is a rake angle, γ is a relief angle, is a negative relief angle, is a cutter mounting included angle, and ζ is a helical angle of the gear to be machined.

Detailed Description

Referring to fig. 1 to 5, an involute cylindrical gear edge chamfer machining tool comprises a cylindrical tool body 200, one end of the cylindrical tool body 200 is a tool shank 220, the tool shank 220 is made of a common carbon tool steel material T10, a cutting plane 221 for axial fixation is arranged at the end of the tool shank 220, the tool is convenient to fix during installation, a chamfer 222 which guides during clamping is arranged at the end edge of the tool shank 220, a tool bit 210 is welded at the other end of the tool body 200, the tool bit 210 is prevented from being loosened due to stress during machining by adopting the welding-integrated design, the tool bit 210 is made of a hard alloy YT5, the strength of the tool bit during machining can be ensured, the root of the tool bit 210 is cylindrical, a cutting part is a multi-face cone, the cutting part comprises a cutting edge 211, a chip groove 212, a front tool face 213, a rear tool face 214 and a secondary rear tool face 215, and the, use the awl point 216 of cutting portion is the symmetric center, is equipped with two cutting edges 211 that are centrosymmetric each other, form an included angle alpha of 60 degrees between two cutting edges 211, and the design of included angle guarantees the cutting processing of cutter, the section of the clockwise of cutting edge 211 is rake face 213, there is an angle to be the anterior angle beta of-6 degrees between rake face 213 and the installation base face 300 of cutter, adopts the design of negative anterior angle, is in order to promote the intensity of cutting edge, increases the life of cutter. The cutting edge 211 is a flank 214 and a minor flank 215 in turn in the counterclockwise direction, the included angle between the rake face 213 and the flank 214 is 70 degrees, the included angle between the flank 214 and the minor flank 215 is 120 degrees, the flank 214 and the minor flank 215 are grindable surfaces, which facilitates the regrinding of the tool and can be used for a plurality of times, a clearance angle γ of 16 degrees exists between the flank 214 and the cutting plane 310 of the cutting edge 211, and the design of a smaller clearance angle is adopted under the condition of avoiding interference, so as to improve the firmness of the cutting edge 211, increase the heat dissipation performance and prolong the service life of the tool. There is an angle to be 22 degrees side relief angles between vice flank 215 and the rake face 213, mainly avoid cutting process in the cutter with by the processing part emergence interference, be equipped with chip groove 212 between this vice flank 215 and the rake face 213, chip groove 212's chip surface is the indent cambered surface, chip groove 212 sets up the heliciform recess that turns to clockwise, and the design that turns to clockwise does benefit to the iron fillings after the direction excision and smoothly discharges.

When in use, the cutter handle 220 of the cutter is inserted into a cutter mounting hole of a numerical control edge milling machine tool, the involute cylindrical gear 100 to be chamfered is mounted on a workbench of the machine tool, then the mounting angle of the cutter is adjusted, the central axis of the cutter and the central axis of the gear 100 to be machined form a mounting included angle on the same plane, the size of the mounting included angle is mainly determined by the helix angle zeta of the gear 100 to be machined and the included angle alpha of two cutting edges of the cutter, the mounting included angle and the cutting-in depth of the cutter can be adjusted according to the angle and the size of the desired chamfer surface, the cutter is fixed after the mounting included angle is determined, then the cutting edge 211 of the cutter is aligned with the chamfer surface 120 of the gear to be machined, the cutting edge 211 of the cutter is tangent to the chamfer surface 120 of the gear 100 to be machined, a cutting surface is formed, the feeding depth of the cutter is adjusted, and the condition that the rest parts of the cutter cannot interfere with the rest parts of, therefore, the preparation work before chamfering the gear is finished, in the machining process, the cutter rotates clockwise around the axis of the cutter, the machined gear rotates reversely around the axis of a machine tool workbench, and the cutting part of the cutter applies cutting acting force to the gear 100 to gradually cut off the chamfering margin of the edge of the machined gear.

This roller gear edge chamfer processing cutter's stable in structure, it has realized the processing of cutter to the roller gear edge chamfer that gradually bursts at seams, welding design through tool bit and handle of a knife, the cutter processing angular deflection who produces because the tool bit takes place the pine when gear chamfer processing has been solved, gear chamfer size after the processing is inconsistent, gear chamfer face produces the problem of step, negative rake angle when the contained angle through each knife face and cutter installation, the relief angle, vice relief angle design, the intensity of tool bit has been promoted, the problem that the tool bit has the rupture risk because of the atress is too big has been solved, the life of cutter has been increased.