CN218657167U - Turning tool for straight profile enveloping worm - Google Patents

Abstract

The utility model discloses a straight profile anchor worm lathe work cutter, the cutter includes the blade disc, is equipped with the cutter fixed slot on the blade disc, can dismantle in the cutter fixed slot and be equipped with the cutter, and the cutter includes the blade, and the blade has a plurality of working faces, and one of them working face is equipped with a cutting edge to form tank bottom lathe tool, left edge lathe tool or right edge lathe tool respectively, tank bottom lathe tool, left edge lathe tool and right edge lathe tool are fixed on the blade disc along the blade disc circumferencial direction equidistant in proper order. The turning tool for the straight profile enveloping worm is characterized in that a worm gear tooth type tool similar to a worm gear is formed by the cutter head and the cutting tools through the arrangement of the turning groups, the cutter head is equivalent to a worm gear body, the cutting tools are equivalent to worm gear teeth, the worm gear tooth type tool and a worm blank are meshed to move to cut a worm tooth shape, and the machined worm is closer to a worm theoretical value.

Description

Turning tool for straight profile enveloping worm

Technical Field

The utility model belongs to the technical field of the lathe, concretely relates to straight profile anchor ring worm lathe work cutter.

Background

The bearing capacity of the straight-profile ring surface worm, namely the TSL-shaped worm, is 4 times that of the common cylindrical worm, but the processing technology is complex and the processing cost is higher. In 20 th year 2018, xipeng, the hobbing machine is utilized, the processing range is expanded, the feasibility is verified, and the processing efficiency is low. In the 24 th year 2011 of industry and science forum, li Song and numerical control lathe macro-program processing of a torus worm, a helicoid is formed by moving a tool nose of a grooving tool, so that roughness of the helicoid is often insufficient; the Chinese agriculture university utility model discloses a turning method of a rod helicoid on a numerical control lathe with a C shaft, which has high processing efficiency and high machine tool cost. The common processing methods of the enveloping worm mainly comprise cyclone milling, numerical control turning and multi-axis machine tool processing, and the processing methods are variable parameter processing methods and can only process the enveloping worm with the straight outline of the non-equidistant spiral line.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a straight profile anchor worm lathe work cutter adopts the meshing motion of profile of tooth cutter and worm base and surely goes out the lathe work method of worm profile of tooth, and the worm of processing is more close to worm theoretical value. .

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a straight profile anchor worm lathe work cutter, includes the blade disc, is equipped with the cutter fixed slot on the blade disc, can dismantle in the cutter fixed slot and be equipped with the cutter, and the cutter includes the blade, and the blade has a plurality of working faces, and one of them working face is equipped with a cutting edge to form tank bottom lathe tool, left edge lathe tool or right edge lathe tool respectively, tank bottom lathe tool, left edge lathe tool and right edge lathe tool are fixed on the blade disc along the blade disc circumferencial direction equidistant in proper order.

In one possible design, the cutter head comprises an upper cutter head and a lower cutter head, wherein an upper cutter head shaft hole is formed in the middle of the upper cutter head, a lower cutter head shaft hole is formed in the middle of the lower cutter head, a plurality of cutter fixing grooves are uniformly distributed in the circumferential direction of the lower cutter head, and the cutter fixing grooves are uniformly distributed on the lower cutter head by taking the cutter head shaft holes below the cutter fixing grooves as centers;

when the upper cutter disc is connected with the lower cutter disc through the first bolt, the upper cutter disc shaft hole and the lower cutter disc shaft hole are coaxial and communicated to form a transmission hole, a rotating shaft penetrates through the transmission hole, the end part of the rotating shaft is connected with the upper cutter disc through a pressing plate, and the rotating shaft is connected with the lower cutter disc through a flat key.

In one possible design, the cutter comprises a cutter body, a cutter core and a cutter head, wherein the cutter core is inserted on the cutter body and extends to the outer side of one end of the cutter body, and the cutter body is provided with a dial at the end;

the tool bit comprises a column base and a bearing platform, the column base is adaptive to the dial, the bearing platform is used for placing the blade, one side of the column base is provided with a slot adaptive to the tool core, the other side of the column base is connected with the bearing platform, the column base is also provided with a connecting groove positioned on the side surface of the bearing platform, a second bolt is detachably arranged on the connecting groove, and correspondingly, the dial is provided with a connecting hole adaptive to the second bolt;

the top surface of cushion cap is the face of placing of adaptation in the blade, and the blade passes through third bolted connection cushion cap, is equipped with the briquetting on the blade, and the briquetting passes through fourth bolted connection cushion cap.

In one possible design, the first bolt is located between adjacent cutter fixing grooves, the upper cutter disc is further provided with auxiliary bolts for connecting cutters, and each cutter is connected with two auxiliary bolts.

In one possible design, the connecting groove is an arc-shaped groove, so that the cutter head can rotate relative to the cutter body by taking the cutter core as a center, the maximum rotating range is the arc length of the arc-shaped groove, and scales for displaying angles are arranged on the periphery of the dial disc;

the side of the dial is provided with teeth for a first end face and correspondingly, the side of the column base is provided with teeth for a second end face adapted to the teeth of the first end face.

In one possible design, the range of rotation of the cutter head relative to the cutter body is plus or minus 10 °.

In one possible design, when the left-edge turning tool or the right-edge turning tool is formed, the blade is in an asymmetric triangular structure, the cutting edge is positioned on the side surface of the asymmetric triangular structure, the front angle of the cutting edge is 24-25 degrees, and the rear angle of the cutting edge is 4-6 degrees;

when the groove bottom turning tool is formed, the blade is of a rectangular structure, and the cutting edge is located on the front end face of the rectangular structure.

In one possible design, the radius of gyration of the slot bottom turning tool is the sum of the radius of the cutter head and the clearance of the top of the worm, and the radius of gyration of the left edge turning tool and the radius of gyration of the right edge turning tool are both the radius of the cutter head.

Has the advantages that:

through the arrangement of a plurality of turning groups, a worm gear tooth type cutter similar to a worm wheel is formed by the cutter head and a plurality of cutting tools, the cutter head is equivalent to a worm wheel body, the cutting tools are equivalent to worm wheel teeth, the worm tooth shape is cut out through the meshing motion of the worm gear tooth type cutter and a worm blank, and the machined worm is closer to the theoretical value of the worm.

The turning group comprises a groove bottom turning tool, a left edge turning tool and a right edge turning tool, the three kinds of tools are used for processing worm tooth shapes from different directions respectively, the worm tooth shapes are prevented from being turned by the three kinds of turning tools simultaneously, the numerical value of single-tooth cutting force is reduced, and the tools are prevented from being broken. The basic shape of the worm is cut by the groove body turning tool, the cutting edges of the left cutting edge turning tool and the right cutting edge turning tool are straight lines, and the tooth surface of the processed worm is an inextensible straight-line curved surface which is closer to a theoretical value.

Meanwhile, the number of times of cutting the worm blank in the process of rotating the cutter head for one circle is increased through the arrangement of the plurality of cutting groups, so that the processing efficiency is greatly improved; and each cutting tool only has a single edge to participate in cutting, which is beneficial to reducing cutting force, improving processing precision and prolonging the service life of the tool.

When a left-edge turning tool and a right-edge turning tool simultaneously cut in the machining process, the directions of the component forces in the axial direction of the worm are opposite, the influence of mechanical transmission gaps on the movement precision of the cutter head can be eliminated, and the machining precision is improved.

The cutter head can rotate relative to the cutter body in the cutter, the cutter angle can be converted according to the worm modulus and the lead, the cutter is suitable for machining of various modulus worms, the application range is enlarged, and the practicability is improved.

Drawings

FIG. 1 is a schematic view of a straight profile torus worm turning machine.

Fig. 2 is a schematic structural diagram of the driving assembly.

Fig. 3 is a schematic view of the structure of the cutter assembly.

Fig. 4 is a schematic structural diagram of the control assembly.

Fig. 5 is a schematic view of the cutting principle.

Fig. 6 is a schematic view of the respective cutting faces of the groove bottom turning tool, the left edge turning tool and the right edge turning tool.

Fig. 7 isbase:Sub>A structural schematic diagram of the cutter head andbase:Sub>A section A-A thereof.

Fig. 8 isbase:Sub>A structural schematic diagram of the upper cutter head andbase:Sub>A section A-A thereof.

Fig. 9 isbase:Sub>A structural schematic diagram of the lower cutter disc andbase:Sub>A-base:Sub>A section thereof.

Fig. 10 is a schematic view of the tool when the insert is configured as a left-hand tool.

Fig. 11 is a schematic sectional view of the tool when the insert is configured as a left-hand turning tool.

Fig. 12 is a schematic top view of the tool when the insert is configured as a left-hand tool.

Fig. 13 is a three-dimensional view of the tool with the insert configured as a right-hand tool.

Fig. 14 is a three-dimensional view of the tool when the insert is configured as a slot bottom turning tool.

In the figure:

100. a machine tool body; 101. a tailstock; 102. a tip; 200. a drive assembly; 201. a spindle motor; 202. a main shaft; 203. a first speed reducer; 204. a chuck; 300. a cutter assembly; 31. a cutter head; 311. feeding a cutter head; 312. a cutter head is arranged; 301. an upper cutter head shaft hole; 302. a lower cutter head shaft hole; 303. a tool fixing groove; 304. a first bolt; 305. pressing a plate; 306. a flat bond; 307. an auxiliary bolt; 32. a cutter assembly body; 33. a dial grip; 34. an electric motor; 35. a second speed reducer; 351. a rotating shaft; 400. a control component; 410. a frequency conversion module; 411. a first frequency converter; 412. a second frequency converter; 420. a fine tuning module; 421. a first trimmer; 422. a second trimmer; 423. a total trimmer; 500. a cutter; 51. a groove bottom turning tool; 52. a left-edge turning tool; 53. a right-edge turning tool; 501. a cutter body; 502. a cutter core; 503. a cutter head; 503a, a pillar stand; 503b, a bearing platform; 504. a blade; 505. a dial scale; 506. connecting grooves; 507. a second bolt; 508. a third bolt; 509. briquetting; 510. a fourth bolt; 511. a cutting edge; 512. and (4) calibration.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the accompanying drawings is only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without any inventive work. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

Example (b):

as shown in fig. 1-14, the present embodiment provides a straight-profile enveloping worm turning machine tool, comprising a machine body 100, a driving assembly 200, a cutter assembly 300 and a control assembly 400;

the driving assembly 200 is arranged on the machine tool body 100, the tailstock 101 which is positioned at the opposite side of the driving assembly 200 is arranged on the machine tool body 100, and a worm clamping part for clamping a worm blank is arranged between the driving assembly 200 and the tailstock 101;

the cutter assembly 300 is arranged on the machine tool body 100 and located on the side face of the machine tool body 100, the cutter assembly 300 comprises a cutter disc 31 meshed with a worm blank, a plurality of turning groups are arranged on the cutter disc 31, the turning groups are sequentially fixed on the outer peripheral face of the cutter disc 31 at equal intervals along the circumferential direction of the cutter disc 31, each turning group comprises a groove bottom turning tool 51 used for machining the bottom face of a worm tooth groove, a left edge turning tool 52 used for machining the left side face of the worm and a right edge turning tool 53 used for machining the right side face of the worm, and the groove bottom turning tool 51, the left edge turning tool 52 and the right edge turning tool 53 are sequentially fixed on the cutter disc 31 at equal intervals along the circumferential direction of the cutter disc 31;

the control assembly 400 is provided on the machine tool body 100 and electrically connects the driving assembly 200 and the cutter assembly 300, respectively, to form a constant gear ratio and achieve an optimal cutting speed.

In order to solve the problems existing in the prior art, the cutter disc 31 is in a meshing motion relationship with the worm blank through the turning group, and the cutter disc 31 slides and rolls along the spiral surface of the worm to form a fixed transmission ratio. Correspondingly, as for the cutter disc 31, through the arrangement of a plurality of turning groups, the cutter disc 31 and a plurality of cutting tools 500 form a worm gear tooth type cutter 500 similar to a worm gear, the cutter disc 31 is equivalent to a worm gear body, the cutting tools 500 are equivalent to worm gear teeth, worm tooth shapes are cut through the meshing motion of the worm gear tooth type cutter 500 and a worm blank, and the machined worm is closer to a worm theoretical value.

Meanwhile, the driving assembly 200 can fix the worm blank on the machine tool body 100 on one hand, and drive the worm blank to rotate on the other hand, so as to complete the cutting process by matching with the cutter assembly 300. The control assembly 400 is used to control the respective rotational speeds of the drive assembly 200 and the cutter assembly 300, and more particularly, both, to provide a constant gear ratio and achieve an optimum cutting speed to improve the quality of the machining.

When working, a worker places and clamps the worm blank on the machine tool body 100; the driving assembly 200 and the cutter assembly 300 are started to start cutting, the feeding depth is adjusted through the cutter assembly 300, the groove bottom turning tool 51 machines the groove bottom surface of the worm tooth, the left edge turning tool 52 machines the left side surface of the worm, the right edge turning tool 53 machines the right side surface of the worm, and then the worm tooth shape is machined; the drive ratio and cutting speed are controlled by the control assembly 400 to improve cutting quality. And after the machining is finished, the worm is taken down and replaced by the next worm blank, and the operations are repeated to carry out the machining again.

Based on the technical scheme, the turning machine tool for the straight-profile enveloping worm solves the problem that equipment applied to machining and manufacturing the straight-profile enveloping worm cannot meet the machining requirement of the straight-profile enveloping worm through the improvement of the structure of the cutter component 300, the machined worm is closer to the theoretical value of the worm, and the machining quality is good.

The cutter disc 31 is in a disc shape, three cutting tools 500, namely a groove bottom turning tool 51, a left edge turning tool 52 and a right edge turning tool 53 are installed on the cutter disc 31, the basic shape of the worm is cut by the groove body turning tool, the cutting edges of the left edge turning tool 52 and the right edge turning tool 53 are straight lines, and the tooth surface of the processed worm is an inextensible straight-line curved surface and is closer to a theoretical value. Meanwhile, the number of times of cutting the worm blank in the process of rotating the cutter head 31 for one circle is increased through the arrangement of the plurality of cutting groups, so that the processing efficiency is greatly improved; and each cutting tool 500 only has a single edge to participate in cutting, which is beneficial to reducing cutting force, improving machining precision and prolonging the service life of the tool 500.

In addition, in the machining process, 2-3 cutting tools 500 are arranged on the cutter disc 31 to participate in cutting, so that the cutting is more stable, and the influence of cutting force on the machining precision of the worm is counteracted. In addition, during actual machining, the diameter of the cutter disc 31 is appropriately increased or decreased according to the diameter of the worm so as to achieve the best cutting effect.

The cutting process is further explained by combining the specific structure of each part of the straight profile enveloping worm turning machine tool as follows:

in this embodiment, the driving assembly 200 includes a spindle motor 201 and a spindle 202, an output end of the spindle motor 201 is connected to the spindle 202 through a first speed reducer 203, and the spindle 202 is rotatably disposed on the machine tool body 100; based on the above technical scheme, through the deceleration of first speed reducer 203, both reduced the inertia of load, realized the rotational speed again and match, simultaneously, the transmission moment of torsion just can improve output torque.

Preferably, a box or a cover is disposed on the machine tool body 100 to cover the driving assembly 200, so as to prevent the attachment and corrosion of impurities such as dust, and to improve the service life of each component in the driving assembly 200. And the driving assembly 200 has the advantages of simple structure and low economic cost.

When the spindle motor 201 is started, the driving force of the spindle motor 201 is transmitted to the spindle 202 through the first speed reducer 203, the spindle 202 rotates under the driving force, the chuck 204 arranged on the spindle 202 and the worm blank clamped on the chuck 204 also rotate, and the rotation of the worm blank is the main motion in worm machining.

In a possible implementation manner, the tailstock 101 is slidably disposed on the machine tool body 100 and located at the opposite side of the spindle 202, and a gap between the tailstock 101 and the spindle 202 is the worm clamping portion; the main shaft 202 is provided with a chuck 204 for clamping a worm blank, and the tailstock 101 is provided with a tip 102 for abutting against the worm blank.

Based on the technical scheme, the distance between the tailstock 101 and the chuck 204 can be adjusted by sliding the tailstock 101 so as to adapt to the processing requirements of worms with different lengths. Meanwhile, when the worker clamps the worm blank, one end of the worm blank is clamped on the chuck 204, and the other end of the worm blank is abutted to the tip 102. The tailstock 101 slides to facilitate the installation of the blank and the removal of the machined worm.

In the present embodiment, the tool assembly 300 includes a tool assembly body 32 located on the machine tool body 100, a dial grip 33 rotatably disposed on the tool assembly body 32, and a motor 34 fixedly connected to the tool assembly body 32, the tool assembly body 32 is connected to the machine tool body 100 through a dovetail guide, the dial grip 33 and the motor 34 are respectively located at two ends of the tool assembly body 32, an output end of the dial grip 33 is connected to the dovetail guide, and an output end of the motor 34 is connected to the cutter head 31 through a second speed reducer 35.

Based on the above technical solution, the tool assembly body 32 is a portion of the tool assembly 300 connected to the machine tool body 100, and may be configured in any suitable shape. The tool assembly body 32 provides an installation space for components such as a dial handle 33 and a motor 34, meanwhile, the tool assembly body 32 covers the dovetail guide rail, the dial handle 33 is rotated to enable the tool assembly body 32 to move transversely on the machine tool body 100, and then the distance between the cutter disc 31 and a worm blank is adjusted, the movement is the feed movement in worm machining, and finally the purposes of adjusting the feed depth of a turning group and controlling the size of the worm are achieved. The driving force of the motor 34 is transmitted to the cutter head 31 via the second speed reducer 35, and the cutter head 31 is rotated by the driving force, and the turning group provided on the cutter head 31 is also rotated, wherein the rotation of the cutter head 31 is the generating motion in the worm machining.

Further, the second speed reducer 35 has the same function as the first speed reducer 203, and is not described again here. Meanwhile, any suitable commercially available model can be selected for the first speed reducer 203 and the second speed reducer 35. In addition, the second speed reducer 35 improves the accuracy of cutting, improves the stability of the torque of the cutter head 31, and contributes to improvement of the machining quality.

In operation, the operator activates the motor 34 to rotate the cutter head 31 and operates the dial grip 33 to bring the cutter head 31 into proximity with the worm blank to engage the turning group with the worm blank. And three cutting tools 500, namely a groove bottom turning tool 51, a left cutting edge turning tool 52 and a right cutting edge turning tool 53, are arranged on the cutter head 31, and are used for respectively processing different surfaces of a worm and mutually matching to cut out a worm tooth shape, wherein the shape and the size of the worm tooth are close to the theoretical state.

In this embodiment, the control assembly 400 includes a frequency conversion module 410 and a fine tuning module 420, wherein the frequency conversion module 410 includes a first frequency converter 411 electrically connected to the driving assembly 200 and a second frequency converter 412 electrically connected to the tool assembly 300, and the fine tuning module 420 includes a first fine tuning device 421 electrically connected to the first frequency converter 411, a second fine tuning device 422 electrically connected to the second frequency converter 412, and a total fine tuning device 423 electrically connecting the first frequency converter 411 and the second frequency converter 412.

Specifically, the first inverter 411 is connected to the spindle motor 201, and the second inverter 412 is connected to the motor 34, whereby the rotational speeds of the spindle 202 and the cutter head 31 can be controlled by the inverter module 410. Further, the first trimmer 421 controls the first frequency converter 411 to work, and the second trimmer 422 controls the second frequency converter 412 to work, so as to form a control chain, which is convenient for workers to adjust, so that any constant transmission ratio is formed between the main shaft 202 and the cutter head 31, and the requirements of processing worms of different specifications are met. And the operation of the spindle motor 201 and the motor 34 is simultaneously controlled by the setting of the overall trimmer 423 to make the optimum cutting speed between the spindle 202 and the cutter head 31 for improving the machining quality.

It is understood that any suitable commercially available frequency conversion device can be used for the first frequency converter 411 and the second frequency converter 412, and any suitable commercially available fine adjustment device can be used for the first fine adjuster 421, the second fine adjuster 422, and the total fine adjuster 4232.

In this embodiment, the cutter head 31 includes an upper cutter head 311 and a lower cutter head 312, wherein the middle part of the upper cutter head 311 is provided with an upper cutter head shaft hole 301, the middle part of the lower cutter head 312 is provided with a lower cutter head shaft hole 302, and the outer side of the lower cutter head shaft hole 302 is provided with a plurality of cutter fixing grooves 303 uniformly distributed on the circumferential direction of the lower cutter head 312;

when the upper cutter disc 311 is connected with the lower cutter disc 312 through the first bolt 304, the upper cutter disc shaft hole 301 and the lower cutter disc shaft hole 302 are coaxial and communicated to form a transmission hole, a rotating shaft 351 penetrates through the transmission hole, the end part of the rotating shaft 351 is connected with the upper cutter disc 311 through a pressing plate 305, and the rotating shaft 351 is connected with the lower cutter disc 312 through a flat key 306.

Based on the above technical scheme, the upper cutter disc 311 and the lower cutter disc 312 are connected into a whole through the first bolt 304, and the cutter 500 is inserted into the cutter fixing groove 303 and pressed by the upper cutter disc 311, so that the cutter 500 is fixed. A driving hole is formed through the upper cutter shaft hole 301 and the lower cutter shaft hole 302, the driving hole is connected with the rotating shaft 351, the rotating shaft 351 is a part of the second speed reducer 35, and the torque is transmitted to the lower cutter 312 through the flat key 306. The flat key 306 does not contact the upper cutter disc 311 to avoid a dislocation between the upper cutter disc 311 and the lower cutter disc 312.

As shown in fig. 7, an end of the rotary shaft 351 is flush with an end surface of the upper cutter deck 311, the upper cutter deck 311 is provided with a presser plate 305, and the presser plate 305 is connected to the rotary shaft 351 by a screw. Meanwhile, the pressure plate 305 applies pressure to the upper cutter disc 311, so that the pressure to the cutter 500 can be increased, and the close contact degree between the upper cutter disc 311 and the lower cutter disc 312 is increased.

Optionally, as shown in fig. 9, each tool fixing groove 303 is inserted with a tool 500, and the tool 500 is a slot bottom turning tool 51, a left-edge turning tool 52 or a right-edge turning tool 53, based on which, the distance between adjacent tools 500 is enlarged to ensure that only 2-3 turning tools 500 turn the worm blank at a time.

Preferably, the first bolts 304 are located between adjacent tool fixing grooves 303, the upper cutter disc 311 is further provided with auxiliary bolts 307 for connecting the tools 500, and each tool 500 is connected with two auxiliary bolts 307. Based on this, the auxiliary bolt 307 is used for increasing the connection point of the cutter 500, so that the cutter 500 is better fixed on the cutter fixing groove 303, and the cutter 500 is prevented from being disturbed in the cutting process.

For the cutter fixing grooves, a plurality of cutter fixing grooves 303 are uniformly distributed on the circumferential direction of the lower cutter 312, and the cutter fixing grooves 303 are uniformly distributed on the lower cutter 312 centering on the lower cutter shaft hole 302. In one possible implementation manner, 12 tool fixing grooves 303 are provided on the lower cutter disc 312, correspondingly, there are 4 turning groups, and each of the slot bottom turning tool 51, the left edge turning tool 52 and the right edge turning tool 53 has 4 turning groups, and in each turning group, the slot bottom turning tool 51, the left edge turning tool 52 and the right edge turning tool 53 are sequentially fixed on the tool fixing grooves 303 along the circumferential direction of the cutter disc 31. Based on the design scheme, the worm is cut for 12 times in each revolution of the cutter disc 31, and the cutting efficiency is practically improved.

In this embodiment, a cutter 500 is detachably disposed in the cutter fixing groove 303, the cutter 500 includes a cutter body 501, a cutter core 502, a cutter head 503 and a blade 504, the cutter core 502 is inserted into the cutter body 501 and extends to the outside of one end of the cutter body 501, and the cutter body 501 is provided with a dial 505 at the end;

the cutter head 503 comprises a column base 503a adapted to the dial 505 and a bearing platform 503b for placing the blade 504, one side of the column base 503a is provided with a slot adapted to the cutter core 502, the other side of the column base 503a is connected with the bearing platform 503b, the column base 503a is further provided with a connecting groove 506 positioned on the side surface of the bearing platform 503b, the connecting groove 506 is detachably provided with a second bolt 507, and correspondingly, the dial 505 is provided with a connecting hole adapted to the second bolt 507;

the top surface of the bearing platform 503b is a placing surface adapted to the blade 504, the blade 504 is connected with the bearing platform 503b through a third bolt 508, a pressing block 509 is arranged on the blade 504, and the pressing block 509 is connected with the bearing platform 503b through a fourth bolt 510;

insert 504 has a plurality of working surfaces, one of which is provided with a cutting edge 511 to form the described trough cutter 51, left blade cutter 52 or right blade cutter 53, respectively.

Based on the above technical scheme, most of the cutter body 501 is inserted into the cutter fixing groove 303, and then the shape of the cutter body 501 is adapted to the cutter fixing groove 303, so as to increase the contact area between the cutter body and the cutter fixing groove, improve the stability and reduce the disturbance. The core 502 is mounted in the cutter body 501 and connects the cutter body 501 and the cutter head 503, which helps to improve the rigidity of the cutter 500 and to expand the range of use of the cutter 500. The cutter head 503 is divided into a column 503a for connecting the cutter body 501 and a bearing platform 503b for placing the blade 504, the blade 504 is fixed on the bearing platform 503b through a third bolt 508, a pressing block 509 is arranged above the blade 504 to press the third bolt 508, and secondary pressing is achieved to ensure that the blade 504 is not disturbed in the turning process.

The cutting blade 511 is arranged on the blade 504, and the groove bottom turning tool 51, the left edge turning tool 52 or the right edge turning tool 53 can be manufactured respectively by limiting the working surface where the cutting blade 511 is located, so that the modular design is realized, the structure of the cutter 500 is simplified, and the economic cost of the cutter 500 is effectively reduced. Further, the shape of the platform 503b is adapted to the shape of the blade 504, so that the service life of the blade 504 is prolonged on the basis of ensuring the cutting effect.

Then in actual use, under the condition that the specification is determined, the cutter body 501 and the cutter core 502 can be prepared in multiple copies with a single specification, and the cutter head 503 is prepared in at least two types according to the shape of the blade 504 to ensure normal use.

Further, the cutter 500 is detachably connected with the cutter disc 31, the cutter 500 is also constructed to be a detachable structure, the cutter discs 31 with different sizes can be replaced, the number of the cutters 500 can be increased or decreased or the cutter heads 503 can be replaced according to the worm module and the enveloping angle, various solutions are provided, the worm cutting machine is suitable for machining worms with different modules, the use convenience is improved, and the machining quality can be guaranteed.

Preferably, the tool core 502 is made of cemented carbide, wherein the cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, and the like, and particularly has high hardness and wear resistance. Alternatively, the core 502 may be made of any suitable material.

In one possible implementation, the coupling groove 506 is configured as an arc-shaped groove so that the tool tip 503 can rotate relative to the tool body 501 centering on the tool core 502, the maximum rotation range is the arc length of the arc-shaped groove, and the scale disk 505 is provided with a scale 512 on the outer circumference thereof for displaying the angle. Based on the technical scheme, the cutter head 503 and the cutter body 501 rotate mutually, the angle of the cutter 500 can be changed according to the worm module and the lead, so that the machining requirements of different helical angles are met, the machining of worms with different modules is adapted, and the application range is expanded.

Preferably, the dial 505 is externally provided with a scale 512 to assist a worker to grasp the numerical value of the actual rotation angle, so as to meet the requirement of precise processing and contribute to improving the processing quality.

Alternatively, the cutting head 503 may rotate within a range of plus or minus 10 ° relative to the body 501.

In one possible implementation, the dial 505 is provided with first end face teeth on its side, and correspondingly, the pedestal 503a is provided with second end face teeth on its side adapted to the first end face teeth. Based on the technical scheme, when the cutter body 501 is connected with the cutter head 503, the first end face teeth and the second end face teeth are meshed with each other to form a firm position relation, the requirement of connection of the first end face teeth and the second end face teeth is met, the probability of dislocation of the cutter head 503 relative to the cutter body 501 in the turning process is also reduced, and the turning quality is guaranteed.

As for the shape of the cutting head 503, the following possible embodiments are listed:

in one possible implementation, as shown in fig. 10-13, when the left-hand turning tool 52 or the right-hand turning tool 53 is formed, the insert 504 has an asymmetric triangular structure, and the cutting edge 511 is located on the side of the asymmetric triangular structure.

In another possible implementation, as shown in fig. 14, when the trough bottom turning tool 51 is formed, the insert 504 has a rectangular structure, and the cutting edge 511 is located on a front end surface of the rectangular structure.

Based on the technical scheme, the structure of the blade 504 is simplified, the manufacturing cost is reduced, and materials are saved. And it is easily understood that the shape of the platform 503b is also configured in an asymmetric triangular structure or a rectangular structure.

Alternatively, the radius of revolution of groove bottom tool 51 is the sum of the radius of cutter disc 31 and the clearance between the worm tooth tops, and the radius of revolution of left blade tool 52 and the radius of revolution of right blade tool 53 are both the radius of cutter disc 31. Based on this, the three kinds of cutters 500 are ensured to cut the designed processing surfaces respectively, and the three kinds of cutters 500 cannot simultaneously turn the three processing surfaces in the cutting process, so that the single-tooth cutting force is reduced, the probability of breakage of the cutters 500 is reduced, and the service life of the cutters 500 is longer.

Optionally, the rake angle of the cutting edge 511 is 24 ° -26 °, and the relief angle of the cutting edge 511 is 4 ° -6 °; based on this, on one hand, the sharpness of the blade 504 and the strength of the blade 504 are guaranteed, on the other hand, the shape of the chip reeling groove is more arc-shaped, the cutting friction is smaller, the loss of the blade 504 is reduced, the broken chips generated in the cutting process are easier to discharge, and the broken chip residue is reduced.

Preferably, the rake angle of the cutting edge 511 is 25 °, and the relief angle of the cutting edge 511 is 5 °.

In this embodiment, a method for turning a straight-profile enveloping worm is introduced on the basis of the machine tool for turning a straight-profile enveloping worm, and the method for turning a straight-profile enveloping worm comprises the following steps:

s100 connection: clamping a worm blank by the straight profile ring surface worm turning processing machine tool;

s200 turning: starting the straight profile ring surface worm turning machine tool to machine a worm blank into a worm;

wherein, the step of turning comprises the following movements:

main movement: the worm blank is driven to rotate by the driving assembly 200;

generating movement: the cutter head 31 rotates and forms a meshing motion relationship with the worm blank, and when the worm blank rotates for 1 revolution, the cutter head 31 rotates for K/Z revolutions, wherein K is the number of heads of the worm, and Z is the number of cutters 500 on the cutter head 31;

feeding movement: driven by the cutter assembly 300, the cutter head 31 makes a vertical feed motion along the radial direction of the worm blank to cut out the full tooth width of the worm.

The turning of the step S200 comprises the following steps:

s201: starting the driving assembly 200 and the cutter assembly 300, wherein the driving assembly 200 drives the worm blank to rotate, and the cutter assembly 300 drives the cutter disc 31 to rotate;

s202: the cutter head 31 and the worm blank are relatively rotated according to a fixed transmission ratio through the control assembly 400;

s203: the groove bottom turning tool 51, the left edge turning tool 52 and the right edge turning tool 53 sequentially turn the bottom surface of the worm tooth groove, the left side surface of the worm and the right side surface of the worm;

s204: the cutter assembly 300 drives the cutter head 31 to perform transverse feeding.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a straight profile torus worm lathe work cutter, a serial communication port, including blade disc (31), be equipped with cutter fixed slot (303) on the blade disc, cutter (500) can be dismantled in cutter fixed slot (303) and be equipped with, cutter (500) include blade (504), blade (504) have a plurality of working faces, one of them working face is equipped with a cutting edge (511), in order to form tank bottom lathe tool (51), left edge lathe tool (52) or right edge lathe tool (53) respectively, tank bottom lathe tool (51), left edge lathe tool (52) and right edge lathe tool (53) are fixed on blade disc (31) at equal interval in proper order along blade disc (31) circumferencial direction.

2. The tool for turning the straight-profile enveloping worm according to claim 1, wherein the cutter (31) comprises an upper cutter (311) and a lower cutter (312), wherein an upper cutter shaft hole (301) is formed in the middle of the upper cutter (311), a lower cutter shaft hole (302) is formed in the middle of the lower cutter (312), a plurality of cutter fixing grooves (303) are uniformly distributed in the circumferential direction of the lower cutter (312), and the cutter fixing grooves (303) are uniformly distributed on the lower cutter (312) centering on the lower cutter shaft hole (302);

when the upper cutter disc (311) is connected with the lower cutter disc (312) through the first bolt (304), the upper cutter disc shaft hole (301) and the lower cutter disc shaft hole (302) are coaxial and communicated to form a transmission hole, a rotating shaft (351) penetrates through the transmission hole, the end part of the rotating shaft (351) is connected with the upper cutter disc (311) through a pressing plate (305), and the rotating shaft (351) is connected with the lower cutter disc (312) through a flat key (306).

3. The tool for turning the straight-profile enveloping worm according to claim 1 or 2, wherein the tool (500) comprises a tool body (501), a tool core (502) and a tool bit (503), the tool core (502) is inserted on the tool body (501) and extends to the outside of one end of the tool body (501), and the tool body (501) is provided with a dial (505) at the end;

the cutter head (503) comprises a column base (503 a) matched with the dial (505) and a bearing platform (503 b) used for placing the blade (504), one side of the column base (503 a) is provided with an insertion groove matched with the cutter core (502), the other side of the column base (503 a) is connected with the bearing platform (503 b), the column base (503 a) is further provided with a connecting groove (506) located on the side face of the bearing platform (503 b), the connecting groove (506) is detachably provided with a second bolt (507), and correspondingly, the dial (505) is provided with a connecting hole matched with the second bolt (507);

the top surface of the bearing platform (503 b) is a placing surface adapted to the blade (504), the blade (504) is connected with the bearing platform (503 b) through a third bolt (508), a pressing block (509) is arranged on the blade (504), and the pressing block (509) is connected with the bearing platform (503 b) through a fourth bolt (510).

4. The tool for turning a straight-profile enveloping worm according to claim 3, wherein the first bolt (304) is located between adjacent tool-holding grooves (303), the upper cutter (311) is further provided with a secondary bolt (307) for connecting the tools (500), and each tool (500) is connected with two secondary bolts (307).

5. The tool for turning the straight profile enveloping worm according to claim 3, wherein the connecting groove (506) is configured as an arc groove to enable the tool bit (503) to rotate relative to the tool body (501) with the tool core (502) as a center, the maximum rotation range is the arc length of the arc groove, and the scale (512) for displaying the angle is arranged on the outer circumference of the scale disc (505);

the side of the dial (505) is provided with first end face teeth and correspondingly the side of the pylon (503 a) is provided with second end face teeth adapted to the first end face teeth.

6. The tool for turning a straight-profile enveloping worm according to claim 5, wherein the tool tip (503) rotates in a range of plus or minus 10 ° relative to the tool body (501).

7. The tool for turning a straight-profile enveloping worm according to claim 1, wherein when forming said left-hand (52) or right-hand (53) turning tool, the insert (504) is of an asymmetrical triangular configuration, the cutting edge (511) is located at the side of the asymmetrical triangular configuration, and the rake angle of the cutting edge (511) is 24 ° -25 °, and the relief angle of the cutting edge (511) is 4 ° -6 °;

when the groove bottom turning tool (51) is formed, the blade (504) is of a rectangular structure, and the cutting edge (511) is located on the front end face of the rectangular structure.

8. The tool for turning a straight-profile enveloping worm according to claim 1, wherein the radius of gyration of the groove bottom turning tool (51) is the sum of the radius of the cutter head (31) and the clearance of the tip of the worm, and the radius of gyration of the left edge turning tool (52) and the radius of gyration of the right edge turning tool (53) are both the radius of the cutter head (31).

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