CN111231342B - Processing technology of nylon gear - Google Patents
Processing technology of nylon gear Download PDFInfo
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- CN111231342B CN111231342B CN202010088059.6A CN202010088059A CN111231342B CN 111231342 B CN111231342 B CN 111231342B CN 202010088059 A CN202010088059 A CN 202010088059A CN 111231342 B CN111231342 B CN 111231342B
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- nylon
- hobbing
- gear
- nylon ring
- ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/002—Component parts, details or accessories; Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/005—Surface shaping of articles, e.g. embossing; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/74—Joining plastics material to non-plastics material
- B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
- B29L2015/003—Gears
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to a processing technology of a nylon gear, wherein the nylon gear comprises a metal shaft and a nylon ring sleeved outside the metal shaft, and the processing technology comprises the following specific steps: A. preparing a nylon ring; B. pressing; C. positioning special gear hobbing equipment; D. hobbing a nylon ring; E. and (4) deburring. The invention has the following advantages: the method changes the traditional step of firstly hobbing and then laminating the nylon ring, avoids the deformation of the pressure stress and the cutting force during hobbing on the inner part of the nylon ring to influence the subsequent lamination, adopts the step of firstly laminating and then hobbing to be convenient for lamination and simultaneously ensure the internal strength of the nylon gear, changes the laminating mode of heating lamination during lamination to avoid the internal thermal stress generated by the nylon ring, and effectively releases the stress in the nylon ring when the metal shaft vertically penetrates through the nylon ring by arranging the stress release groove to avoid the stress concentration from influencing the internal structural strength of the nylon gear.
Description
The technical field is as follows:
the invention relates to the field of nylon gears, in particular to a processing technology of a nylon gear.
Background art:
the nylon gear is one of the most widely used parts in mechanical transmission, and because nylon has good comprehensive performance, the nylon gear is commonly used for transmission with light machinery, instruments and meters and other equipment, and the nylon gear is a structure formed by pressing a nylon ring and a metal shaft. The current nylon gear processing technology is as follows: the outer surface to nylon ring and metal axle carries out the gear hobbing earlier, then carries out the pressfitting with nylon ring and metal axle, carries out burring processing at last, through heating the metal axle during the pressfitting, makes the nylon ring soften when pressing with the nylon ring to reach the effect of quick pressfitting, this kind of processing technology has following defect:
1. the nylon gear is heated and then pressed, so that pressing is convenient, but thermal deformation is easily generated in the nylon ring, the structural strength of the pressed nylon gear is influenced, and when the nylon gear is in use and meets a large transmission force, the nylon ring starts to crack at the internal thermal deformation part and the like, so that the subsequent service life of the nylon gear is influenced;
2. when in gear hobbing, the gear hobbing bulge generates compressive stress on the outer end face of the nylon ring, the elastic deformation of the nylon material is larger than that of metal, under the action of the cutting force and the compressive stress of the gear hobbing bulge, the lower edge area of the tooth width of the nylon ring can generate larger elastic deformation, and meanwhile, the gear hobbing bulge rotates in the circumferential direction during gear hobbing so as to cut the nylon ring from top to bottom, burrs are concentrated in the lower edge area of the tooth width, the quantity of the burrs is large, the time and the labor are consumed during deburring work, and due to the characteristic of the nylon ring, vibration is easy to occur during cutting of the top of the nylon ring under the action of the cutting force, so that the tooth surface smoothness is low; secondly, the step of hobbing first and then laminating, the diameter of the inner hole of the nylon ring can be influenced under the action of pressure stress during hobbing, certain difficulty can be generated for subsequent laminating, and the structural strength of the nylon ring can be damaged by forced laminating.
Therefore, a processing technology of the nylon gear needs to be provided, which not only avoids the internal structural strength of the nylon ring, but also avoids the deformation of the hobbing surface, and prolongs the service life of the nylon gear.
The invention content is as follows:
the invention aims to overcome the defects and provide a processing technology of a nylon gear, which not only avoids the internal structural strength of a nylon ring, but also avoids the deformation of the surface of a hobbing, and prolongs the service life of the nylon gear.
The purpose of the invention is realized by the following technical scheme: a processing technology of a nylon gear comprises a metal shaft and a nylon ring sleeved outside the metal shaft, and comprises the following specific steps:
A. preparing a nylon ring: cutting and punching a nylon rod to form a plurality of nylon rings, wherein the inner walls of the nylon rings are provided with a plurality of circular grooves which are distributed in an equal circumference manner, the extending direction of the circular grooves is consistent with that of the nylon rings, and the bottoms of the circular grooves of the nylon rings are provided with stress release grooves which are consistent with that of the nylon rings;
B. and (3) laminating: forming a plurality of convex ribs which are distributed in an equal circumference way on the outer end surface of the metal shaft which is sleeved with the nylon ring through extrusion, wherein the extending direction of the convex ribs is consistent with the extending direction of the metal shaft, the section of each convex rib is semicircular, and the nylon ring and the metal shaft are pressed through a pressing machine to ensure that the metal shaft penetrates through the nylon ring, and the convex ribs and the circular grooves are ensured to be sequentially corresponding during pressing to form a nylon gear blank;
C. positioning the special gear hobbing equipment: the special gear hobbing equipment comprises a base, a gear hobbing mechanism and a clamping mechanism, wherein the gear hobbing mechanism is arranged on the base;
the hobbing mechanism comprises a hobbing seat arranged on the base and a hobbing shaft arranged on the hobbing seat, a hobbing column is integrally arranged at the center of the hobbing shaft, a plurality of hobbing bulges are uniformly distributed on the outer circumference of the hobbing column, and the hobbing shaft is driven by a motor to rotate;
the clamping mechanism comprises a clamping seat arranged on the base, a first fixing block and a second fixing block which are arranged on the clamping seat, the first fixing block and the second fixing block are respectively provided with a clamping group, each clamping group comprises a clamping sleeve, a metal sleeve sheet and a rotary pressing cylinder, the rotary pressing cylinders are arranged in the corresponding first fixing block and the corresponding second fixing block, the rotary pressing cylinders are fixedly connected with the clamping sleeves, the metal sleeve sheets are sleeved at one end of a metal shaft of the nylon gear blank, the outer end face of the metal sleeve sheet is flush with the outer end face of a nylon ring of the nylon gear blank, the metal sleeve sheet is fixedly connected with the clamping sleeve in a sleeved mode, the metal sleeve sheets arranged on two sides of the nylon ring of the nylon gear blank are fixedly clamped or loosened with the nylon ring along with the stretching of the rotary pressing cylinder, the nylon ring and the metal sleeve sheets rotate along with the rotation of the rotary pressing cylinder in a fixed clamping state, and the nylon gear blank is arranged close to the hobbing column;
D. nylon ring hobbing:
firstly, a nylon gear blank is installed, rotary pressing cylinders on special hobbing equipment are reset, after a clamping sleeve on each clamping group is fixed with a metal sleeve sheet, two ends of a metal shaft of the nylon gear blank correspond to the metal sleeve sheets on two sides, the rotary pressing cylinders on each clamping group are started, the driving ends of the two rotary pressing cylinders drive the metal sleeve sheets, the metal sleeve sheets are pressed with the end faces of corresponding nylon rings, and the rotary pressing cylinders stop driving in the horizontal direction;
secondly, hobbing the outer end face of the nylon ring, starting a motor of a hobbing mechanism to enable a hobbing column on a hobbing shaft to realize horizontal circumferential rotation, hobbing the outer end face of the nylon ring, wherein the hobbing stroke is from one metal sleeve sheet to another metal sleeve sheet, rotating a downward pressing cylinder to rotate 30-45 degrees at the moment, and continuing hobbing the outer end face of the nylon ring from top to bottom until the nylon ring rotates 360 degrees to finish hobbing of the outer end face of the nylon ring, so that a nylon gear is prepared;
and finally, unloading the nylon gear: the rotary pressing cylinder stops rotating and contracts, so that two ends of a metal shaft of the nylon gear are separated from the metal sleeve sheet, and the nylon gear is blanked;
E. deburring: and (4) deburring the hobbing nylon gear by a brush.
The invention is further improved in that: the metal sleeve sheet comprises a gasket part and a sleeve part, the gasket part and the sleeve part are of an integrated forming structure, one end of the sleeve part is a closed surface, the other end of the sleeve part is an open surface, one end of a metal shaft penetrates through the open surface of the sleeve part to be in contact with the closed surface, the end face, close to the sleeve part, of the closed surface is provided with a first nylon ring, one end of the metal shaft penetrates through the first nylon ring to be in contact with the closed surface, the gasket part is arranged in a mode of being attached to the end face of the nylon ring, the side end face of the gasket part is flush with the side end face of the nylon ring, and the clamping sleeve is connected with the sleeve part of the metal sleeve sheet in a fitting mode.
The invention is further improved in that: the clamping sleeve is provided with a groove for embedding the sleeve part, the side wall of the groove is provided with an internal thread, the bottom of the groove is clamped with a second nylon ring, the outer edge of the sleeve part is provided with an external thread, the internal thread and the external thread are matched with each other, and one end of the sleeve part is connected through the thread and penetrates through the second nylon ring to be in contact with the bottom of the groove.
The invention is further improved in that: and C, two triangular support frames which horizontally correspond to each other are arranged on the hobbing base, the hobbing shaft penetrates through the two triangular support frames horizontally, one end of the hobbing shaft penetrates through the corresponding triangular support frames and is connected with a motor shaft of the motor through a belt, and a bearing is sleeved on the outer end face of the hobbing shaft, which is in contact with the corresponding triangular support frames.
The invention is further improved in that: the number of the circular grooves in the step A is 2-3.
Compared with the prior art, the invention has the following advantages:
1. the traditional step of firstly hobbing and then laminating the nylon ring is changed, the phenomenon that the pressure stress and the cutting force during hobbing generate deformation to the inside of the nylon ring to influence the subsequent lamination is avoided, the step of firstly laminating and then hobbing is adopted, the lamination is convenient, the internal strength of the nylon gear is ensured, the lamination mode of heating lamination is changed during lamination, the internal thermal stress generated by the nylon ring is avoided, and the stress inside the nylon ring is effectively released when the metal shaft vertically penetrates through the nylon ring by arranging the stress release groove, so that the internal structural strength of the nylon gear is prevented from being influenced by stress concentration; secondly, the circular groove is matched with the convex rib, so that metal and nylon are mutually embedded, the connection stability of the nylon gear blank is improved, and the nylon ring gear blank cannot rotate with the metal shaft when being subjected to the cutting force of the hobbing.
2. The outer end face of the nylon ring of the nylon gear blank is subjected to hobbing by adopting special hobbing equipment, metal sleeve sheets are arranged on the two end faces of the nylon ring, hobbing protrusions start to cut hobbing from one metal sleeve sheet to the other metal sleeve sheet during hobbing, and because the metal rigidity is far better than that of a nylon material, the hobbing protrusions are uniform in cutting force from one metal sleeve sheet to the other metal sleeve sheet, elastic deformation is avoided on the lower edge of the tooth width, vibration at the top of the nylon ring gear is reduced simultaneously, the tooth surface is smoother, and the burr amount is reduced.
Description of the drawings:
fig. 1 is a schematic structural view of a nylon ring in step a of the processing process of a nylon gear of the present invention.
Fig. 2 is a schematic structural diagram of the metal shaft in step B of the processing process of the nylon gear of the present invention.
Fig. 3 is a schematic structural view of the nylon ring and the metal shaft after being pressed in step B of the processing technique of the nylon gear of the present invention.
Fig. 4 is a schematic structural diagram of special gear hobbing equipment in step C of the processing technology of the nylon gear.
Fig. 5 is a schematic structural diagram of the hobbing mechanism in step C of the processing technology of the nylon gear of the present invention.
Fig. 6 is a schematic structural view of a clamping sleeve of a nylon gear processing technology of the invention.
FIG. 7 is a schematic structural diagram of a metal sleeve of a nylon gear processing technique of the present invention.
Fig. 8 is a schematic structural diagram of the metal sleeve and the metal sleeve sheet installed in step D of the nylon gear processing technology of the present invention.
Fig. 9 is a schematic structural diagram of the nylon gear after the metal nest plate and the nylon ring clamp are pressed in step D of the processing technique of the nylon gear of the present invention.
Reference numbers in the figures:
1-nylon ring, 11-circular groove, 12-stress release groove;
2-metal shaft, 21-convex rib;
3-nylon gear blank, 4-base, 5-hobbing mechanism and 6-clamping mechanism;
51-a hobbing base, 52-a hobbing shaft, 53-a hobbing column, 54-a hobbing bulge, 55-a motor, 56-a triangular support base, 57-a bearing and 58-a belt;
61-clamping seat, 62-first fixed block, 63-second fixed block, 64-clamping group, 641-clamping sleeve, 642-metal sleeve sheet, 643-rotary pressing cylinder, 644-gasket part, 645-sleeve part, 646-closed surface, 647-open surface, 648-groove, 649-internal thread, 650-second nylon ring, 651-external thread and 652-first nylon ring.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
The nylon gear comprises a metal shaft 2 and a nylon ring 1 sleeved outside the metal shaft 2, and the nylon gear comprises the following specific steps:
A. preparing a nylon ring: as shown in fig. 1, a nylon rod is cut and punched to form a plurality of nylon rings 1, the inner wall of each nylon ring 1 is provided with a plurality of circular grooves 11 distributed in an equal circumference, the extending direction of each circular groove 11 is consistent with the extending direction of each nylon ring 1, and the bottom of each circular groove 11 of each nylon ring 1 is provided with a stress release groove 12 consistent with the extending direction of each nylon ring 1;
B. and (3) laminating: as shown in fig. 2, a plurality of protruding ribs 21 distributed in an equal circumference are formed on the outer end face of the metal shaft 2, which is located at the outer end face of the metal shaft 2 and sleeved with the nylon ring 1, by extrusion, the extending direction of the protruding ribs 21 is consistent with the extending direction of the metal shaft 2, the cross section of the protruding ribs 21 is semicircular, the nylon ring 1 and the metal shaft 2 are pressed together by a pressing machine, so that the metal shaft 2 penetrates through the nylon ring 1, as shown in fig. 3, the protruding ribs 21 and the circular grooves 11 are ensured to sequentially correspond to each other during pressing, and a nylon gear blank 3 is formed;
C. positioning the special gear hobbing equipment: as shown in fig. 4, the special hobbing apparatus comprises a base 4, a hobbing mechanism 5 arranged on the base 4, and a clamping mechanism 6 for clamping the nylon gear blank 3;
as shown in fig. 5, the hobbing mechanism 5 comprises a hobbing base 51 arranged on the base 4 and a hobbing shaft 52 arranged on the hobbing base 51, a hobbing column 53 is integrally arranged at the center of the hobbing shaft 52, a plurality of hobbing protrusions 54 are uniformly distributed on the outer circumference of the hobbing column 53, and the hobbing shaft 52 is driven by a motor 55 to rotate;
the clamping mechanism 6 comprises a clamping seat 61 arranged on the base 4, a first fixing block 62 and a second fixing block 63 arranged on the clamping seat 61, the first fixing block 62 and the second fixing block 63 are respectively provided with a clamping group 64, the clamping group 64 comprises a clamping sleeve 641, a metal sleeve 642 and a rotary pressing cylinder 643, the rotary pressing cylinder 643 is arranged in the corresponding first fixing block 62 and the second fixing block 63, the rotary pressing cylinder 643 is fixedly connected with the clamping sleeve 641, the metal sleeve 642 is sleeved at one end of the metal shaft 2 of the nylon gear blank 3, the outer end surface of the metal sleeve 642 is flush with the outer end surface of the nylon ring 1 of the nylon gear blank 3, the metal sleeve 642 is fixedly connected with the clamping sleeve 641 in a sleeved mode, the metal sleeve 642 arranged at two sides of the nylon ring 1 of the nylon gear blank 3 realizes fixed clamping or releasing with the nylon ring 1 along with the extension and contraction of the rotary pressing cylinder 643, the nylon ring 1 and the metal sleeve 642 rotate along with the rotation of the rotary pressing cylinder 643 in a fixed clamping state The nylon gear blank 3 is arranged close to the hobbing column 53;
D. nylon ring hobbing:
firstly, a nylon gear blank 3 is installed, as shown in fig. 8, a rotary pressing cylinder 643 on a dedicated hobbing device is reset, after a clamping sleeve 641 on each clamping group 64 is fixed with a metal sleeve piece 642, after two ends of a metal shaft 2 of the nylon gear blank 3 correspond to the metal sleeve pieces 642 on two sides, the rotary pressing cylinder 643 on each clamping group 64 is started, the driving ends of the two rotary pressing cylinders 643 drive towards the metal sleeve pieces 642, as shown in fig. 9, the metal sleeve pieces 642 are pressed against the end faces of the corresponding nylon rings 1, and at this time, the rotary pressing cylinder 643 stops driving in the horizontal direction;
secondly, hobbing the outer end face of the nylon ring 1, starting a motor 55 of a hobbing mechanism 5 to enable a hobbing column 53 on a hobbing shaft 52 to realize horizontal circumferential rotation, hobbing the outer end face of the nylon ring 1, wherein the hobbing stroke is from one metal sleeve 642 to the other metal sleeve 642, at the moment, a rotating down-pressing cylinder 643 rotates for 30-45 degrees, hobbing is continuously performed on the outer end face of the nylon ring 1 from top to bottom until the nylon ring 1 rotates for 360 degrees, so that hobbing of the outer end face of the nylon ring 1 is completed, and the nylon gear is prepared;
and finally, unloading the nylon gear: the rotary pressing cylinder 643 stops rotating and contracts, so that two ends of a metal shaft 2 of the nylon gear are separated from the metal sleeve piece 642, and blanking of the nylon gear is achieved;
E. deburring: and (4) deburring the hobbing nylon gear by a brush.
It should be noted that, the processing of the nylon gear is mass production, the steps described above only describe the processing technology of a single nylon gear, and during actual processing, the nylon ring 1 and the metal shaft 2 can be prepared in mass, and the pressing, gear hobbing and deburring can be performed in mass.
The traditional step of firstly hobbing and then laminating the nylon ring 1 is changed, the phenomenon that the pressure stress and the cutting force during hobbing generate deformation to the inside of the nylon ring to influence the subsequent lamination is avoided, the step of firstly laminating and then hobbing is adopted, the lamination is convenient, the internal strength of the nylon gear is ensured, the lamination mode of heating lamination is changed during lamination, the internal thermal stress generated by the nylon ring 1 is avoided, and the stress inside the nylon ring 1 is effectively released when the metal shaft 2 vertically penetrates through the nylon ring 1 by arranging the stress release groove 12, so that the internal structural strength of the nylon gear is prevented from being influenced by stress concentration; secondly, the circular groove 11 is matched with the convex rib 21, so that metal and nylon are mutually embedded, the connection stability of the nylon gear blank 3 is improved, and the nylon ring gear blank 3 and the metal shaft 2 which are mutually embedded cannot rotate when receiving the cutting force of hobbing.
The outer end face of a nylon ring 1 of a nylon gear blank 3 is hobbed by special hobbing equipment, metal sleeve sheets 642 are arranged on the two end faces of the nylon ring 1, hobbing protrusions start to cut hobbing from one metal sleeve sheet 642 to the other metal sleeve sheet 642 during hobbing, and because the metal rigidity is far better than that of a nylon material, the hobbing protrusions 54 are uniform in cutting force from one metal sleeve sheet 642 to the other metal sleeve sheet 642, elastic deformation of the lower edge of the tooth width is avoided, vibration of the top of the nylon ring 1 tooth is reduced, the tooth surface is smoother, and burr amount is reduced.
In the invention, the rotary hold-down cylinder 643 can be an SMC type rotary hold-down cylinder MKB20-10LZ, and can realize first hold-down and then rotate a certain angle stroke within an angle range of 180 degrees or 360 degrees, after the circumferential direction rotates 180 degrees or 360 degrees, the rotary hold-down cylinder moves upwards for resetting, and then the next procedure is carried out in the same step.
Further, as shown in fig. 7, the metal sleeve piece 642 includes a gasket portion 644 and a sleeve portion 645, the gasket portion 644 and the sleeve portion 645 are integrally formed, one end of the sleeve portion 645 is a closed surface 646, the other end is an open surface 647, one end of the metal shaft 2 passes through the open surface 647 of the sleeve portion 645 to contact with the closed surface 646, an end surface of the closed surface 646 close to the sleeve portion 645 is provided with a first nylon ring 652, one end of the metal shaft 2 passes through the first nylon ring 652 to contact with the closed surface 646, the gasket portion 644 is closely attached to an end surface of the nylon ring 1, a side end surface of the gasket portion 644 is flush with a side end surface of the nylon ring 1, and the clamping sleeve 641 is connected to the sleeve portion 645 of the metal sleeve piece 642 in a fitting manner.
Further, as shown in fig. 6, the clamping sleeve 641 has a groove 648 in which the sleeve portion 645 is fitted, a side wall of the groove 648 has an internal thread 649, a bottom of the groove 648 is engaged with a second nylon ring 650, an outer edge of the sleeve portion 645 has an external thread 651, the internal thread 649 and the external thread 651 are engaged with each other, and one end of the sleeve portion 645 is connected by a thread and penetrates through the second nylon ring 650 to contact with a bottom of the groove 648.
One end of the metal shaft 2 of the clamping group 64 and the sleeve portion 645 embedded in the metal sleeve 642, and the first nylon ring 645 is arranged to generate a resilient force to one end of the metal shaft 2, so that when the rotary pushing cylinder 643 presses one end of the metal shaft 2, the friction force in the circumferential direction of the metal shaft 2 is increased, and the metal shaft 2 is prevented from being subjected to the action of hobbing cutting force and rotating relative to the metal sleeve 642, thereby influencing the hobbing effect.
Secondly, the sleeve portion 645 of the metal sleeve piece 642 is in threaded connection with the clamping sleeve 643, so that the metal sleeve piece is convenient to detach and install, the second nylon ring 650 is arranged, the second nylon ring 650 which is extruded generates resilience force on threads of the sleeve portion 645, friction force is increased, looseness of threaded connection is avoided, and accordingly clamping force on the nylon gear blank is affected.
Furthermore, in the step C, two triangular supports 56 corresponding to each other horizontally are arranged on the hobbing base 51, the hobbing shaft 52 penetrates through the two triangular supports 56 horizontally, one end of the hobbing shaft 52 penetrates through the corresponding triangular support 56 and is connected with the motor shaft of the motor 55 through a belt 58, and a bearing 57 is sleeved on the outer end face of the hobbing shaft 52 contacting with the corresponding triangular support 56.
The working principle of the hobbing mechanism 5 is as follows: when the motor 55 is started, the belt 58 drives the gear hobbing shaft 52 to rotate, so that the gear hobbing columns 53 on the gear hobbing shaft 52 rotate circumferentially in the radial direction, and the clamping group 64 drives the nylon gear blank 3 to rotate circumferentially in the transverse direction, so that the gear hobbing of 360 degrees on the outer end surface of the nylon ring 1 of the nylon gear blank 3 is realized; of course, the rotation direction of the rack column 53 is perpendicular to the rotation direction of the nylon gear blank 3, and the present invention is not limited to the above.
The size of the gear hobbing protrusion 54 on the gear hobbing mechanism 5 can be set according to the tooth width and tooth shape of gear hobbing required, which is common knowledge of those skilled in the art and therefore will not be described in detail.
Furthermore, in the step a, the number of the circular grooves 11 is 2-3, the number of the circular grooves 11 is not large, the circular grooves 11 are excessively arranged, it is required to ensure that each circular groove 11 corresponds to the convex rib 21 during pressing, and difficulty is increased for pressing the subsequent nylon ring 1 and the metal shaft 2.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A processing technology of a nylon gear is characterized in that: the nylon gear comprises a metal shaft (2) and a nylon ring (1) sleeved outside the metal shaft (2), and the nylon gear comprises the following specific steps:
A. preparing a nylon ring: cutting and punching a nylon rod to form a plurality of nylon rings (1), wherein the inner wall of each nylon ring (1) is provided with a plurality of circular grooves (11) distributed in an equal circumference manner, the extending direction of each circular groove (11) is consistent with the extending direction of each nylon ring (1), and the bottom of each circular groove (11) of each nylon ring (1) is provided with a stress release groove (12) consistent with the extending direction of each nylon ring (1);
B. and (3) laminating: forming a plurality of convex ribs (21) which are distributed in an equal circumference manner on the outer end face of the metal shaft (2) which is sleeved with the nylon ring (1) through extrusion, wherein the extending direction of the convex ribs (21) is consistent with the extending direction of the metal shaft (2), the section of each convex rib (21) is semicircular, pressing the nylon ring (1) and the metal shaft (2) through a pressing machine to enable the metal shaft (2) to penetrate through the nylon ring (1), and ensuring that the convex ribs (21) and the circular grooves (11) sequentially correspond to each other during pressing to form a nylon gear blank (3);
C. positioning the special gear hobbing equipment: the special gear hobbing equipment comprises a base (4), a gear hobbing mechanism (5) arranged on the base (4) and a clamping mechanism (6) used for clamping a nylon gear blank (3);
the hobbing mechanism (5) comprises a hobbing base (51) arranged on the base (4) and a hobbing shaft (52) arranged on the hobbing base (51), a hobbing column (53) is integrally arranged at the center of the hobbing shaft (52), a plurality of hobbing protrusions (54) are uniformly distributed on the outer circumference of the hobbing column (53), and the hobbing shaft (52) is driven by a motor (55) to rotate;
the clamping mechanism (6) comprises a clamping seat (61) arranged on the base (4) and a first fixing block (62) and a second fixing block (63) arranged on the clamping seat (61), the first fixing block (62) and the second fixing block (63) are respectively provided with a clamping group (64), each clamping group (64) comprises a clamping sleeve (641), a metal sleeve sheet (642) and a rotary pressing cylinder (643), the rotary pressing cylinders (643) are arranged in the corresponding first fixing block (62) and the corresponding second fixing block (63), the rotary pressing cylinders (643) are fixedly connected with the clamping sleeves (641), the metal sleeve sheets (642) are sleeved at one end of a metal shaft (2) of a nylon gear blank (3), the outer end faces of the metal sleeve sheets (642) are flush with the outer end faces of a nylon ring (1) of the nylon gear blank (3), and the metal sleeve sheets (642) are sleeved and fixedly connected with the clamping sleeves (641), the metal sleeve sheets (642) arranged on two sides of the nylon ring (1) of the nylon gear blank (3) are fixedly clamped or loosened with the nylon ring (1) along with the extension and retraction of the rotary pressing cylinder (643), the nylon ring (1) and the metal sleeve sheets (642) rotate along with the rotation of the rotary pressing cylinder (643) in a fixed clamping state, and the nylon gear blank (3) is arranged close to the hobbing column (53);
D. nylon ring hobbing:
firstly, a nylon gear blank (3) is installed, a rotary pressing cylinder (643) on special gear hobbing equipment is reset, after a clamping sleeve (641) on each clamping group (64) is fixed with a metal sleeve sheet (642), two ends of a metal shaft (2) of the nylon gear blank (3) correspond to the metal sleeve sheets (642) on two sides, the rotary pressing cylinder (643) on each clamping group (64) is started, the driving ends of the two rotary pressing cylinders (643) are driven to the metal sleeve sheets (642), the metal sleeve sheets (642) are pressed against the end faces of the corresponding nylon rings (1), and at the moment, the rotary pressing cylinder (643) stops driving in the horizontal direction;
secondly, hobbing the outer end face of the nylon ring (1), starting a motor (55) of a hobbing mechanism (5) to enable a hobbing column (53) on a hobbing shaft (52) to rotate circumferentially in the horizontal direction, hobbing the outer end face of the nylon ring (1), wherein the hobbing stroke is from one metal sleeve sheet (642) to the other metal sleeve sheet (642), rotating a downward pressing cylinder (643) to rotate 30-45 degrees at the moment, continuing hobbing the outer end face of the nylon ring (1) from top to bottom until the nylon ring (1) rotates 360 degrees to finish hobbing the outer end face of the nylon ring (1), and obtaining the nylon gear;
and finally, unloading the nylon gear: the rotary pressing cylinder (643) stops rotating and contracts, so that two ends of a metal shaft (2) of the nylon gear are separated from the metal sleeve sheet (642), and blanking of the nylon gear is realized;
E. deburring: and (4) deburring the hobbing nylon gear by a brush.
2. The processing technology of the nylon gear according to claim 1, characterized in that: the metal sleeve piece (642) comprises a gasket portion (644) and a sleeve portion (645), the gasket portion (644) and the sleeve portion (645) are in an integral forming structure, one end of the sleeve portion (645) is a closed surface (646), the other end of the sleeve portion (645) is an open surface (647), one end of the metal shaft (2) penetrates through the open surface (647) of the sleeve portion (645) to be in contact with the closed surface (646), the end face, close to the sleeve portion (645), of the closed surface (646) is provided with a first nylon ring (652), one end of the metal shaft (2) penetrates through the first nylon ring (652) to be in contact with the closed surface (646), the gasket portion (644) is arranged in close fit with the end face of the nylon ring (1), the end face of the gasket portion (644) is flush with the side end face of the nylon ring (1), and the clamping sleeve (641) is connected with the sleeve portion (645) of the metal sleeve piece (642) in a fitting mode.
3. The processing technology of the nylon gear according to claim 2, characterized in that: the clamping sleeve (641) is provided with a groove (648) for embedding the sleeve portion (645), the side wall of the groove (648) is provided with an internal thread (649), the bottom of the groove (648) is clamped with a second nylon ring (650), the outer edge of the sleeve portion (645) is provided with an external thread (651), the internal thread (649) and the external thread (651) are matched with each other, and one end of the sleeve portion (645) is in contact with the bottom of the groove (648) through threaded connection and penetrating through the second nylon ring (650).
4. The processing technology of the nylon gear according to claim 1, characterized in that: and C, two triangular support frames (56) corresponding to each other horizontally are arranged on the gear hobbing base (51) in the step C, the gear hobbing shaft (52) penetrates through the two triangular support frames (56) horizontally, one end of the gear hobbing shaft (52) penetrates through the corresponding triangular support frames (56) and is connected with a motor shaft of a motor (55) through a belt (58), and a bearing (57) is sleeved on the outer end face, contacting with the corresponding triangular support frames (56), of the gear hobbing shaft (52).
5. The process for machining a nylon gear according to any one of claims 1 to 4, wherein: the number of the circular grooves (11) in the step A is 2-3.
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| CN202010088059.6A CN111231342B (en) | 2020-02-12 | 2020-02-12 | Processing technology of nylon gear |
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| CN202010088059.6A CN111231342B (en) | 2020-02-12 | 2020-02-12 | Processing technology of nylon gear |
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| CN116604824B (en) * | 2023-06-05 | 2023-12-01 | 江苏丰东热技术有限公司 | Processing furnace for nylon inlaid gear |
| CN117168271B (en) * | 2023-11-02 | 2023-12-29 | 南通市中吕齿轮有限公司 | Gear tooth thickness detection equipment |
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