CN115846773A - Method for machining micro drum-shaped cylindrical gear by using obliquely-installed machining disc - Google Patents
Method for machining micro drum-shaped cylindrical gear by using obliquely-installed machining disc Download PDFInfo
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Abstract
The invention discloses a method for processing a micro drum-shaped cylindrical gear by using an obliquely-installed processing disc, which comprises the following steps of installing a gear blank to be processed on a rotating table; adjusting the inclination angle of the processing disc according to the drum shape to be processed; the machining disc rotates, when the gear blank is cut deeply, the gear blank does not rotate but only does feed motion, and after a cutter finishes cutting, the gear blank does feed motion in the direction close to the large machining disc so as to cut the thickness of the gear teeth; cutting the left half tooth groove deeply and then directly performing generating machining on the gear blank; after half of tooth grooves are processed by cutting and generating, the gear blank is divided into 1/Z circle after being withdrawn, then the cutting and generating of the next half of tooth grooves are carried out, when one side of all the tooth grooves is cut deeply and the generating processing is finished, the processing disc rotates to enable the other side of the processing disc to be close to the gear blank, and the tooth grooves on the other side of the gear are processed by cutting and generating after the cutter setting; the invention can be used for directly processing the cylindrical gear with drum shape.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a method for machining a micro-drum cylindrical gear by using an obliquely-installed machining disc.
Background
The tooth surface of a common standard gear is a theoretical involute and is widely applied to the fields of automobiles, machine tools and the like, and in the meshing process of a gear pair, because the tooth top part generates local elastic deformation, when the gear tooth is meshed into a tooth space, the tooth top sharp corner often touches the tooth surface of another gear tooth first, so that larger impact and noise are generated. And the contact line is distributed in the middle of the gear teeth and the two sides are narrow when the drum-shaped gear is meshed, so that the meshing noise of the cylindrical gear can be effectively reduced. In the prior art, a Chinese invention patent with the publication number of CN 109834339A, which is entitled "modifying method of involute gear", is disclosed, and the publication number is 2019.06.04, and the publication number is CN 109834339A, and mainly comprises the following steps that when processing the involute gear, the tooth profile of the involute gear is modified in a drum shape on the involute tooth profile of the involute gear, so that compared with the involute tooth profile of a theoretical involute gear, the modified involute tooth profile curve is in a drum shape, and the tooth profile of the involute gear is modified in the tooth width direction of the involute gear, so that the tooth direction of the modified involute gear is in a drum shape curve with a large middle and small ends, and different devices are required to be used for processing the involute tooth profile and the drum shape respectively, and the processing efficiency is not high.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems associated with the prior art methods of machining crowned cylindrical gears.
Therefore, an object of the present invention is to provide a method of machining a micro-drum type cylindrical gear using an oblique installation machining disk, which can directly machine a cylindrical gear having a drum amount.
In order to solve the technical problems, the invention provides the following technical scheme: a method for processing a micro drum-shaped cylindrical gear by using an obliquely installed processing disc comprises the following steps,
mounting a gear blank to be processed on a rotating table;
mounting the cutters on processing rods, wherein each processing rod is mounted on a processing disc;
adjusting the inclination angle of the processing disc according to the drum shape to be processed;
the machining disc rotates, when the gear blank is cut deeply, the gear blank does not rotate but only does feed motion, and after a cutter finishes cutting, the gear blank does feed motion in the direction close to the large machining disc so as to cut the thickness of the gear teeth;
cutting the left half tooth socket, namely the right side micro-convex tooth surface of the gear tooth, and then directly performing generating machining on the gear blank;
after half of tooth grooves are processed by cutting and generating, the gear blank is withdrawn and then is divided into 1/Z circle, then the cutting and generating of the next half of tooth grooves are carried out, when one side of all the tooth grooves is cut deeply and the generating processing is finished, the processing disc is rotated to enable the other side of the processing disc to be close to the gear blank, and the tooth grooves on the other side of the gear are processed by cutting and generating after the cutter setting;
wherein Z is the number of teeth.
As a further improvement of the invention, the gear blank is not fed during the generating process, and the gear blank is wound around Z at an angular velocity omega C Rotate clockwise while rotating at speed
Along X C Moving in the positive direction of the axis to finish the generating processing of the right-side slightly convex tooth surface of the gear tooth; establishing a coordinate system O C X C Y C Z C With the center of the gear blank as the origin O C Origin of O C The direction of horizontal forward extension is X C Positive axial direction, origin O C The horizontal rightward extending direction is Y C Positive axial direction, origin O C The vertical upward extending direction is Z C In the positive axial direction, m is the modulus and z' is the number of generated teeth.
As a further improvement of the invention, the drum shape quantity of the gear blank to be processed is determined according to four parameters of a gear module m, a tooth width B, an inclination angle theta of a processing disc and a radius R of the processing disc, and the inclination angle of the processing disc is reversely deduced through the gear module m, the tooth width B, a track radius R of a top point of the outer end of a cutter and the required drum shape quantity.
As a further improvement of the present invention, the drum shape amount is calculated by,
cutting off a conical surface formed by the blade track of the cutter to obtain a tooth trace at the reference circle at one side of the gear tooth, wherein the tooth trace equation is as follows,
the intersection point of the tooth trace and the end face of the gear is
Line segment A 1 A 2 Midpoint is A 3 (x a ,0,z a ) The intersection point of the tooth trace and the tooth width central line is B (x) b ,0,z b )；
The drum measure is
In order to further improve the reliability of the connection between the cutter and the processing rod, a plurality of processing sinking grooves are arranged at the forward end of the processing disc, the processing rod comprises a connecting part, one end of the connecting part, which extends out of the processing disc, is fixed with a processing part, the connecting part is inserted into the processing sinking grooves, the connecting part is fixedly connected onto the processing disc, the outer end of the processing part is provided with a connecting sinking groove, and the cutter is inserted into the connecting sinking groove and is fixedly connected to the outer end of the processing part.
In order to improve the reliability that processing pole and processing disc are connected, be connected with first card near the processing disc outside that processing sinks the groove, first card compresses tightly at the connecting portion front side, is connected with the second card near the processing portion outside that connects heavy groove, the second card compresses tightly on the cutter.
In order to further make things convenient for the regulation of cutter inclination, a plurality of installing ports that are used for installing the cutter and the connector with the installing port one-to-one have been arranged on the processing disc, be connected with first connecting piece and second connecting piece on the processing disc at installing port both ends respectively, first connecting piece stretches into to correspond the intraoral one end of installing and is connected with first grip block, and the second connecting piece stretches into to correspond the intraoral one end of installing and is connected with the second grip block, first grip block and second grip block can be tight with the cutter clamp simultaneously.
In order to further improve the connection reliability of the processing rod and the processing disc, a guide opening is formed in the processing rod, a fastening bolt penetrates through the guide opening to be connected with the processing disc, and a pressing part of the fastening bolt is pressed on a limiting step of the processing rod.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a perspective view of the present invention.
Fig. 2 is a first perspective view of the machining rod of the present invention mounted on a machining disc.
Fig. 3 is a partially enlarged view of a point a in fig. 2.
Fig. 4 is a second three-dimensional structure diagram of the processing rod installed on the processing disc in the invention.
Fig. 5 is a partially enlarged view of B in fig. 4.
FIG. 6 is a schematic diagram of the machining of a micro-drum cylindrical gear according to the present invention.
Fig. 7 is a view in elevation at C-C in fig. 6.
FIG. 8 is a schematic view of the machining principle of the right tooth surface of the gear tooth of the micro drum cylindrical gear in the invention.
FIG. 9 is a schematic view of the machining principle of the left tooth surface of the gear tooth of the micro drum type cylindrical gear in the invention.
FIG. 10 is a schematic diagram of the tooth flank generating process on the right side of the gear tooth of the micro drum cylindrical gear in the present invention.
FIG. 11 is a schematic diagram of the tooth flank generating process of the left side of the gear tooth of the micro drum type cylindrical gear in the present invention.
Fig. 12 is a perspective view of a crowned cylindrical gear machined using the present invention.
Fig. 13 is a structural view of a single tooth in a crowned cylindrical gear.
FIG. 14 is a schematic view of the assembly engagement of a pair of micro-drum cylindrical gears with a diameter of 180 mm and a diameter of 90mm according to the present invention.
Fig. 15 is a partially enlarged view of fig. 14 at D.
In the figure, 1 a transmission motor, 2 a second sliding seat, 3 a processing platform, 4 a disc mounting bracket, 5 an angle adjusting motor, 6 a tool, 7 a processing rod, 701 a connecting part, 702 a processing part, 703 a limit step, 8 a processing disc, 9 a gear blank, 10 a rotating table, 11 a transmission seat, 12 a second fixing bolt, 13 a first clamping piece, 14 a first fixing bolt, 15 a third fixing bolt, 16 a second clamping piece, 17 a first nut, 18 a first connecting piece, 19 a first clamping block, 20 a fastening bolt, 21 a second clamping block, 22 a second nut, 23 a second connecting piece, a processing sinking groove, b a connecting sinking groove, c a mounting port, d a connecting port, f a tool track, g plane Σ, and h conical surface.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures of the present invention are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 3 and 6 to 15, this embodiment provides a method for machining a micro-drum type cylindrical gear using an oblique installation machining disk, which is a first embodiment of the present invention, and can directly machine a cylindrical gear with a drum shape.
A method for processing a micro-drum cylindrical gear by using an obliquely installed processing disc 8 comprises the following steps,
(S1) mounting a gear blank 9 to be processed on a rotating table 10;
(S2) mounting the tool 6 to the processing rod 7;
(S3) adjusting the inclination angle of the processing disc 8 according to the drum shape to be processed, and installing each processing rod 7 on the processing disc 8 to enable the central shaft of the cutter 6 to be aligned with the center of the gear blank 9;
(S4) the processing disc 8 rotates, when the gear blank 9 is cut deeply, the gear blank 9 does not rotate but only does feed motion, and after the cutting of the cutter 6 is finished, the gear blank does feed motion in the direction close to the large processing disc 8 so as to cut the thickness of the gear teeth; forming two surfaces of a micro convex surface and a micro concave surface when the cutter 6 cuts deeply, only finishing half of one tooth groove by one-time cutting and processing, finishing the processing of one tooth groove by two-time cutting and processing, enabling the two sides of the tooth groove to be micro convex surfaces, and directly performing generating processing on a gear blank 9 after cutting deeply the left half tooth groove, namely the micro convex tooth surface on the right side of the gear tooth; after the half tooth grooves are processed by cutting and generating, the gear blank 9 is divided by 1/Z ring after retracting, then the cutting and generating of the next half tooth groove are carried out, the gear blank 9 does not make feed motion during generating processing, the gear blank 9 winds Z at the angular speed omega C Rotate clockwise while rotating at speed
Along X C Moving in the positive direction of the shaft to finish the generating processing of the right-side slightly convex tooth surface of the gear tooth, when one side of all tooth grooves is cut deeply and generating processing is finished, rotating the processing disc 8 to enable the other side to be close to the gear blank 9, cutting deeply and generating processing are carried out on the tooth groove at the other side of the gear after tool setting until the processing is finishedCutting and generating all tooth sockets;
wherein Z is the number of teeth; establishing a coordinate system O C X C Y C Z C With the center of the gear blank 9 as the origin O C Origin O C The direction of horizontal forward extension is X C Positive axial direction, origin O C The horizontal rightward extending direction is Y C Positive axial direction, origin O C The vertical upward extending direction is Z C In the positive axial direction, m is the modulus and z' is the number of generated teeth.
The structure that is used for installing gear blank 9 and processing disc 8 during processing sets up on the processing machine tool, connect processing platform 3 on the lathe, sliding connection can horizontal slip first slide and second slide 2 on processing platform 3, first slide is equivalent to a gearbox, first slide upper end fixed connection gives the gearbox transmission power be used for adjusting processing disc 8 inclination's angle accommodate motor 5, be connected with the disc installing support 4 of vertical setting on the first slide, angle accommodate motor 5 and disc installing support 4 transmission are connected, fixedly connected with processing motor on the disc installing support 4, processing motor and processing disc 8 transmission are connected, be connected with on the second slide 2 along second slide 2 length direction gliding transmission seat 11 in front and back, transmission motor 1 that the upper end fixedly connected with of transmission seat 11 is used for driving the rotatory drive motor 1 of gear blank 9, rotationally be connected with on the transmission seat 11 and rotate the platform 10, transmission seat 11 is equivalent to the headstock that is used for power transmission, transmission motor 1 is connected with platform 10 transmission through the inside transmission structure of transmission seat 11 repeatedly, it connects to realize that disc installing support 4 and rotate platform 10, this structure that rotates is not the platform 10, this is the current technology.
In practical implementation, a structure for respectively driving the first sliding seat and the second sliding seat 2 to realize position adjustment in the left-right direction and a structure for driving the transmission seat 11 to realize position adjustment in the front-back direction can be further arranged on the processing platform 3.
The gear blank 9 is arranged at a rotating platform 10, and the rotating platform 10 is driven by a transmission motor 1 to rotate around Z C Rotating; while the rotary table 10 can be moved along the machine tool Y C The axis direction makes linear motion to realize tooth surfaceFor deep-cutting work, the rotary table 10 can be moved along the machine X C Linear motion is carried out in the axial direction to realize generating machining of the tooth surface, and the track radius R of the top point of the outer end of the cutter 6 and the machining discs 8 and X are adjusted according to the design parameters and the drum shape quantity of the machined gear C O C Z C The angle of the faces theta. In the embodiment, 4 processing rods 7 are arranged on the processing disc 8, and the included angle between every two adjacent processing rods 7 is 90 degrees; in the cutting process, the 1 st to 3 rd machining rods sequentially and roughly cut tooth shapes, then the 4 th machining rod 7 is used for precisely cutting, and each time the machining rod rotates through a rotating table of a cutter 6 and follows the machine tool Y C The feeding is completed by the linear motion in the axial direction. When the right side of the processing disc 8 is close to the gear blank 9, the processing disc 8 rotates for 1 circle to complete the cutting depth of the left half part of the tooth groove. After the left half of one tooth space is deeply cut, the left half of the tooth space is generated and processed, as shown in fig. 8, the motion relation diagram of the left half of the generated tooth space is shown, the processing disc 8 rotates during generation, and the rotating table 10 rotates at an angular speed w c Drives the gear blank to rotate, and simultaneously the transmission seat 11 drives the rotating table 10 to rotate along the machine tool X C The right side of the gear tooth moves along the positive direction of the shaft to finish the generating processing of the right side tooth surface of one gear tooth. When the left side of one gear tooth is cut deeply and is unfolded, the second sliding seat 2 is driven along Y C The direction is withdrawn, the rotating platform 10 drives the gear blank 9 to rotate for one tooth, then the cutting depth and the generating processing of the left half part of the next tooth socket are continued, and when the cutting depth and the generating processing of the left half part of all the tooth sockets are finished, the second sliding seat 2 drives the rotating platform 10 to rotate along Y C The direction is withdrawn, the angle adjusting motor 5 acts, the disc mounting bracket 4 rotates, and the processing disc 8 and the X are enabled to rotate C O C Z C The included angle of the surface is a set inclination angle theta, the left side of the processing disc 8 is close to the gear blank 9, and the cutting depth and the generating processing of the right half part of the tooth socket are the same as those of the left half part of the tooth socket, so that the description is omitted.
In the step (S3), the crown quantity of the gear blank 9 to be processed is determined according to four parameters, namely the gear module m, the tooth width B, the inclination angle θ of the processing disc 8 and the radius R of the processing disc 8, and the inclination angle of the processing disc 8 is reversely deduced through the gear module m, the tooth width B, the track radius R of the top point of the outer end of the cutter 6 and the required crown quantity.
As shown in fig. 6, the planes g and X of the disk 8 are processed C O C Z C The included angle of the surface and the included angle of the central axis of the processing rod 7 and the processing disc 8 are both theta, namely the central axis of the processing rod 7 is vertical to the X C O C Z C When the micro drum-shaped cylindrical gear is machined, the machining disc 8 rotates clockwise at a uniform speed, and the motion track of the cutter 6 is at X C O C Z C The surface is an ellipse with a major semi-axis a = R and a minor semi-axis b = R × cos θ (wherein R is the track radius of the right vertex of the cutter 6, and θ is the plane of the processing disc 8 and X C O C Z C Angle of face) of used tool 6 m wide and X C O C Z C The plane parallel to the plane Σ cuts off the conical surface formed by the edge locus of the tool 6 to obtain the tooth trace at the pitch circle on the gear tooth side, and as shown in fig. 7, the center of the machining disc 8 is the origin O D Establishing a coordinate system S D (O D X D Y D Z D ) Extending parallel to the surface of the working disk 8 and away from the gear blank 9 is X D Positive axial direction, perpendicular to X D The direction of the axis and the oblique backward extension is Z D Positive axial direction, perpendicular to X D O D Y D The direction of the plane and the vertical upward extension is Y D Positive axial direction, and coordinate system S D Along Z D The positive axial direction is translated by Rtan (theta +20 degrees) to obtain a coordinate system S D '(O D 'X D 'Y D 'Z D ') of the tool 6 in a coordinate system S D The equation in can be expressed by
To obtain a value of z 2 ＝tan 2 (70°-θ)(x 2 +y 2 ) Wherein the gear pressure angle is 20 ° (x) 0 ，y 0 And 0) a circular locus formed by the movement of the tool tip of the tool 6 in a coordinate system S D '(O D 'X D 'Y D 'Z D ') coordinates of any point, z 0 The vertex of the conical surface formed for the path of the cutting edge is in the coordinate system S D '(O D 'X D 'Y D 'Z D ') Z D The coordinate, t is a parameter, and (x, y, z) is the conical surface formed by the blade track in a coordinate system S D '(O D 'X D 'Y D 'Z D ') at any point, and obtaining the coordinates in the coordinate system S by translation coordinate transformation D The equation in (1) is (z-Rtan (70 ° -theta)) 2 ＝tan 2 (70°-θ)(x 2 +y 2 ) Plane-sigma in the coordinate system S D The equation in (1) is: />
The tooth trace equation is then: />
The equation simultaneous can be written as:
(x d ，y d ，z d ) For the tooth trace in the coordinate system S D (O D X D Y D Z D ) The coordinates of any one point in the image,
the intersection point of the tooth trace and the end face of the gear is
Line segment A 1 A 2 The midpoint is A 3 (x a ,0,z a ) The intersection point of the tooth trace and the tooth width central line is B (x) b ,0,z b )；
Drum volume of
From the above, according to the gear module m, the tooth width B, the inclination angle θ of the processing disk 8 and the radius R of the processing disk 8, the drum shape of the processed cylindrical gear can be determined; for example, when the gear module m =3, the tooth width B =30, the track radius R =500mm at the right vertex of the tool 6, and the inclination angle θ of the machining disc 8 is between 65 ° and 70 °, the crown amount of the gear is between 0mm and 0.1621 mm.
The middle line of the tooth width of the processed micro drum-shaped cylindrical gear is bulged, the two sides are narrow, small drum-shaped amount exists, the whole micro drum-shaped cylindrical gear is symmetrical, a whole tooth model is shown in figure 12, and a single tooth model is shown in figure 13; as shown in fig. 14 and 15, when a pair of micro drum-shaped cylindrical gears are in standard meshing, contact lines are mainly distributed in the middle of the gear teeth, the stress in the middle of the gear teeth is large, the stress at two ends of the gear teeth is small, stress concentration at tooth roots at two ends of the gear teeth can be reduced, the bearing capacity of the gears is improved, and transmission between the gears is more stable. When a pair of micro drum-shaped cylindrical gears are engaged in a non-standard mode, the micro drum-shaped cylindrical gears are in point contact under the condition of no stress, the stress point is deviated to one end of a gear tooth, under the condition of stress, due to elastic deformation, the point contact is changed into partial line contact extending from the contact point to two ends of the gear tooth, the stress borne by the middle part of the gear tooth is obviously larger than the stress borne by the two ends of the gear tooth, and the technical problems of easy unbalance loading and pitting failure caused by the problems of axis deviation and the like of the existing straight-tooth cylindrical gears are solved.
In order to further improve the connection reliability of the cutter 6 and the processing rod 7, a plurality of processing sinking grooves a are arranged at the forward end of the processing disc 8, the processing rod 7 comprises a connecting portion 701, a processing portion 702 is fixed at the end, extending out of the processing disc 8, of the connecting portion 701, the connecting portion 701 is inserted into the processing sinking grooves a, the connecting portion 701 is fixedly connected to the processing disc 8, a connecting sinking groove b is formed in the outer end of the processing portion 702, the cutter 6 is inserted into the connecting sinking groove b and fixedly connected to the outer end of the processing portion 702, a first clamping piece 13 is connected to the outer side of the processing disc 8 close to the processing sinking groove a, the first clamping piece 13 is tightly pressed on the front side of the connecting portion 701, a second clamping piece 16 is connected to the outer side of the processing portion 702 close to the connecting sinking groove b, and the second clamping piece 16 is tightly pressed on the cutter 6.
When installing the processing pole 7, use first fixing bolt 14 to screw on connecting portion 701, will be connected with connecting portion 701 of first fixing bolt 14 and inject into processing heavy groove a, make connecting portion 701 rear side contradict on processing disc 8, continue rotatory first fixing bolt 14, first fixing bolt 14 screws in processing disc 8, realize the initial connection of connecting portion 701 and processing disc 8, use second fixing bolt 12 with first card 13 initial connection on processing disc 8, continue to screw in second fixing bolt 12, compress tightly first card 13 in the connecting portion 701 outside, use third fixing bolt 15 with second card 16 initial connection in processing portion 702 outer end, continue to screw in third fixing bolt 15, make second card 16 compress tightly on cutter 6, realize the connection of processing pole 7 and processing disc 8 and the connection of cutter 6 and processing pole 7.
Example 2
Referring to fig. 4 and 5, this embodiment is a second embodiment of the present invention, and can further realize the installation angle adjustment of the processing rod.
In order to further facilitate the adjustment of the inclination angle of the cutter 6, a plurality of mounting holes c used for mounting the cutter 6 and connecting ports d which are in one-to-one correspondence with the mounting holes c are distributed on the processing disc 8, a first connecting piece 18 and a second connecting piece 23 are respectively connected to the processing disc 8 at the two ends of each mounting hole c, the inner end of the first connecting piece 18 is connected with a first clamping block 19, one end of the second connecting piece 23 extending into the corresponding mounting hole c is connected with a second clamping block 21, the cutter 6 can be simultaneously clamped by the first clamping block 19 and the second clamping block 21, the outer end of the connecting port of the first connecting piece 18 is in threaded connection with a first nut 17, and one end of the second connecting piece 23 at the d is in threaded connection with a second nut 22; the processing rod 7 is provided with a guide opening, and a fastening bolt 20 penetrates through the guide opening to be connected with the processing disc 8, so that the outer end of the fastening bolt 20 is pressed on the limiting step 703 of the processing rod 7.
The plane g of one end of the first clamping block 19, which is opposite to the plane g of the second clamping block 21, is parallel to the plane g of the other end of the first clamping block 19, the plane g of the other end of the second clamping block 21, which is opposite to the plane g of the other end of the first clamping block 19, which is opposite to the plane g of the other end of the second clamping block 21, is a clamping surface, the inclination angles of the different clamping surfaces are different, the first clamping block 19 and the second clamping block 21 are selected according to actual needs, the connecting bolt passes through the guide port and contacts with the limiting step 703, the machining rod 7 is inserted into the installation port c and placed between the first clamping block 19 and the second clamping block 21, the first connecting piece 18 and the second connecting piece 23 are screwed in, the first clamping block 19 and the second clamping block 21 clamp the machining rod 7, the first clamping block 19 and the second clamping block 21 are fixedly connected to the first connecting piece 18 and the second connecting piece 23 respectively by using the fastening screw, the first clamping block 17 and the second clamping block 21 are fastened to the first connecting piece 18 and the second connecting piece 23, the nut 17 is screwed to the first connecting piece 18 and the second clamping block 23, and the nut 17 are fastened to the nut 17, and the nut 17 are fastened to the nut 8, and the nut is fastened to the nut on the nut and the nut fastening screw connection piece 20; in this design, the angle adjustment of the central axis of the machining rod 7 relative to the gear blank 9 is achieved by replacing the first clamping block 19 and the second clamping block 21 which are different.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. A method for processing a micro drum-shaped cylindrical gear by using an obliquely installed processing disk is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,
mounting a gear blank (9) to be processed on a rotating table (10);
mounting the cutters (6) on processing rods (7), wherein each processing rod (7) is mounted on a processing disc (8);
adjusting the inclination angle of the processing disc (8) according to the drum amount to be processed;
the machining disc (8) rotates, when the gear blank (9) is cut deeply, the gear blank (9) does not rotate but only does feed motion, and after the cutting of one cutter (6) is finished, the gear blank does feed motion in the direction close to the large machining disc (8) so as to cut the thickness of the gear teeth;
directly performing generating machining on a gear blank (9) after cutting deep a left half tooth groove, namely a right-side slightly-convex tooth surface of the gear tooth;
after half of tooth grooves are processed by cutting and generating, the gear blank (9) is withdrawn and then is divided into 1/Z circle, then the cutting and generating of the next half of tooth grooves are carried out, when one side of all the tooth grooves is cut deeply and the generating processing is finished, the processing disc (8) is rotated to enable the other side of the processing disc to be close to the gear blank (9), and the tooth grooves on the other side of the gear are processed by cutting deeply and generating after tool setting;
wherein Z is the number of teeth.
2. The method of machining a micro-drum cylindrical gear using an oblique installation machining disk as claimed in claim 1, wherein: the gear blank (9) does not make feeding movement during the generating process, the gear blank (9) makes clockwise rotation around ZC at angular speed and simultaneously makes clockwise rotation at speed
Along X C Moving in the positive direction of the axis to finish the generating processing of the right-side slightly convex tooth surface of the gear tooth; establishing a coordinate system O C X C Y C Z C With the center of the gear blank (9) as the origin O C Origin O C The direction of horizontal forward extension is X C Positive axial direction, origin O C The horizontal rightward extending direction is Y C Positive axial direction, origin O C A vertical upward projecting direction Z C In the positive axial direction, m is the modulus and z' is the number of generated teeth.
3. The method of machining a micro-drum cylindrical gear using an obliquely installed machining disk as claimed in claim 1 or 2, wherein: determining the drum shape quantity of a gear blank (9) to be machined according to four parameters of a gear module m, a tooth width B, an inclination angle theta of a machining disc (8) and a radius R of the machining disc (8), and reversely deducing the inclination angle of the machining disc (8) through the gear module m, the tooth width B, a track radius R of an outer end vertex of a cutter (6) and the required drum shape quantity.
4. The method of machining a micro-drum cylindrical gear using an oblique installation machining disk as set forth in claim 3, wherein: the drum shape amount is calculated by a method in which,
the conical surface formed by the blade track of the cutter (6) is cut to obtain the tooth trace of the reference circle at one side of the gear tooth, the tooth trace equation is as follows,
the intersection point of the tooth trace and the end face of the gear is
Line segment A 1 A 2 The midpoint is A 3 (x a ,0,z a ) The intersection point of the tooth trace and the tooth width central line is B (x) b ,0,z b )；
Drum volume of
5. The method of machining a micro-drum cylindrical gear using an obliquely installed machining disk as claimed in claim 1 or 2, wherein: processing disc (8) forward one end a plurality of processing heavy grooves (a) of having arranged, processing pole (7) include connecting portion (701), connecting portion (701) stretch out the outer one end of processing disc (8) and are fixed with processing portion (702), connecting portion (701) are pegged graft in processing heavy groove (a), and connecting portion (701) fixed connection is on processing disc (8), the outer end of processing portion (702) is opened and is connected heavy groove (b), and cutter (6) are pegged graft and are being connected heavy groove (b) department and fixed connection in processing portion (702) outer end.
6. The method of machining a micro-drum cylindrical gear using an oblique installation machining disk as set forth in claim 5, wherein: the outer side of the processing disc (8) close to the processing sinking groove (a) is connected with a first clamping piece (13), the first clamping piece (13) is pressed on the front side of the connecting portion (701), the outer side of the processing portion (702) close to the connecting sinking groove (b) is connected with a second clamping piece (16), and the second clamping piece (16) is pressed on the cutter (6).
7. The method of machining a micro-drum type cylindrical gear using an obliquely installed machining disc as set forth in claim 1 or 2, wherein: the utility model discloses a cutter (6) is installed to the last installing port (c) that has arranged of processing disc (8) and with installing port (c) one-to-one connector (d), be connected with first connecting piece (18) and second connecting piece (23) on processing disc (8) at installing port (c) both ends respectively, first connecting piece (18) stretch into the one end that corresponds in installing port (c) and are connected with first grip block (19), and second connecting piece (23) stretch into the one end that corresponds in installing port (c) and are connected with second grip block (21), first grip block (19) and second grip block (21) can press from both sides cutter (6) tightly simultaneously.
8. The method of machining a micro-drum cylindrical gear using an obliquely installed machining disk as set forth in claim 7, wherein: the processing rod (7) is provided with a guide opening, and a fastening bolt (20) penetrates through the guide opening to be connected with the processing disc (8), so that a pressing part of the fastening bolt (20) is pressed on a limiting step (703) of the processing rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211508591.4A CN115846773A (en) | 2022-11-29 | 2022-11-29 | Method for machining micro drum-shaped cylindrical gear by using obliquely-installed machining disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211508591.4A CN115846773A (en) | 2022-11-29 | 2022-11-29 | Method for machining micro drum-shaped cylindrical gear by using obliquely-installed machining disc |
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| Publication Number | Publication Date |
|---|---|
| CN115846773A true CN115846773A (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211508591.4A Pending CN115846773A (en) | 2022-11-29 | 2022-11-29 | Method for machining micro drum-shaped cylindrical gear by using obliquely-installed machining disc |
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| CN (1) | CN115846773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117681024A (en) * | 2024-01-21 | 2024-03-12 | 金华新天齿轮有限公司 | Gear machining cutter changing mechanism and device |
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2022
- 2022-11-29 CN CN202211508591.4A patent/CN115846773A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117681024A (en) * | 2024-01-21 | 2024-03-12 | 金华新天齿轮有限公司 | Gear machining cutter changing mechanism and device |
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