CN219648726U

CN219648726U - But drive end screw rod transposition lathe tool

Info

Publication number: CN219648726U
Application number: CN202320553722.4U
Authority: CN
Inventors: 任元平; 柏桂华
Original assignee: NINGBO CHUANJINGYU MECHANICAL TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: NINGBO CHUANJINGYU MECHANICAL TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-09-08
Anticipated expiration: 2033-03-21

Abstract

The utility model provides a driving end screw rod indexable turning tool, and belongs to the technical field of machining. According to the utility model, the turning tool is arranged as the tool apron and the blades, the blades are arranged on the tool apron through the pressing blocks, so that the split arrangement of the turning tools is realized, the independence of the blades is ensured, the cutting parts at the two ends of each blade are arranged in a central symmetry manner, the cutting edges of the blades can be continuously processed in a mode of turning around the blades or replacing the independent blades even if damaged, the whole turning tool is not required to be replaced, the use cost is reduced, the blades are arranged on the tool apron through arranging the blade mounting grooves with the limiting grooves, the mounting stability of the blades is improved, the pressing area of the blades is increased, the problems of shifting, loosening and slipping of the blades after the cutting angle is changed are effectively prevented, the safety and reliability are improved, the risk of damage to the surfaces of the blades is reduced through increasing the pressing area, the whole service life of the turning tool is prolonged, and the use cost of the turning tool is further reduced.

Description

But drive end screw rod transposition lathe tool

Technical Field

The utility model relates to the technical field of machining, in particular to a driving end screw rod indexable turning tool.

Background

The driving end screw rod is used as a main component of a driving structure, is a key for realizing power transmission, and the screw thread on the driving end screw rod is matched with the structures such as a nut, and the screw rod is used as the driving structure to drive the nut to move, so that the quality of the screw thread on the driving end screw rod directly determines the stability of power transmission.

At present, a cutter that is used for processing drive end screw rod on the market is like the turning cutter of patent CN109550985A disclosure suitable for processing high pitch screw rod, including threading tool, cutter arbor and blade holder, the lathe tool is installed in the head of cutter arbor, is provided with the mounting hole on the blade holder, but the cutter arbor not insert the mounting hole of locating the blade holder in and relative blade holder is rotatory, is equipped with the fastener that is used for locking the cutter arbor on the blade holder, installs the lathe tool through the cutter arbor, simultaneously, through the cutter arbor installation cutter arbor in the mounting hole internal rotation of blade holder, realizes that cutter cutting relief angle is nimble adjustable. The structure is higher in structural flexibility, but because the lathe tool is in an integrated rod-shaped structure, the cutter blade of the lathe tool is required to be integrally replaced after being damaged, the use cost is higher, in addition, the head of the cutter bar clamps the end part of the lathe tool through the clamping plate, the fastener is installed in the fastener installation hole on the clamping plate to tightly press the lathe tool, at the moment, the clamping plate is a flat plate, the lathe tool and the cutter bar are only locked through the fastener, the end part of the fastener is directly contacted with the surface of the lathe tool, the contact area of the end part of the fastener is small, when the cutting angle is adjusted, the problem that the lathe tool is shifted, loosened and slipped easily due to the change of the stress direction is solved, the safety is poor, the damage to the surface of the lathe tool is caused, and the service life of the cutter is shortened.

Disclosure of Invention

The utility model provides a but to the above-mentioned problem that exists among the prior art, now aim at providing a drive end screw indexable lathe tool, with set up the lathe tool as blade holder and the blade of split type arrangement, the one end of blade holder is provided with the blade mounting groove of taking spacing face, blade demountable installation is in the mounting groove, simultaneously, demountable installation has a briquetting on the blade holder, compress tightly the blade through the briquetting, not only can make alone change the blade under the circumstances that the cutting edge is damaged can, need not whole change, reduced use cost, in addition, the accessible is spacing to the blade, simultaneously, set up the briquetting alone and compress tightly the blade, the installation stability of blade has been improved, the compression area of blade has been increased, the problem that blade shift appears after effectively having prevented to change cutting angle, become flexible and the slippage has improved the security, blade surface damage problem has also been prevented through great compression area simultaneously, the life of lathe tool has been prolonged, further reduced use cost.

The specific technical scheme is as follows:

a drive-end screw indexable turning tool having the features comprising:

the tool apron is characterized in that two ends of the tool apron are respectively a mounting end and a processing end, the mounting end is detachably connected with a tool rest of a lathe, one cross section of the processing end is in V-shaped arrangement to form a mounting surface and side avoidance surfaces positioned on two sides of the mounting surface, meanwhile, the tip of the processing end is flat-headed to form a top avoidance surface, a concave blade mounting groove is formed in the mounting surface and positioned at one end close to the top avoidance surface, a concave limiting groove is formed in the bottom of the blade mounting groove, and a locking hole is formed in the mounting surface and positioned at the side of the blade mounting groove;

the blade comprises a middle connecting part and cutting parts positioned at two ends of the middle connecting part, the two cutting parts are arranged in a central symmetry mode relative to the middle connecting part, meanwhile, the upper edge of each cutting part is arranged in a U shape to form three cutting edges, when the blade is installed in the blade eccentric installation groove, the three cutting edges of one cutting part respectively protrude out of the two side avoidance surfaces and one top avoidance surface, and meanwhile, the lower part of the blade is embedded in the limiting groove;

the middle part of briquetting has seted up one and has locked the mounting hole that the hole corresponds, and a retaining member passes behind the mounting hole and is connected with the locking hole, and the one end of briquetting extends to in the blade mounting groove and is provided with the face that compresses tightly that arranges towards in the blade mounting groove, and when the blade is installed in the blade mounting groove, compresses tightly the face and compresses tightly on intermediate junction portion.

The driving end screw rod indexable turning tool comprises a turning tool body, wherein the groove wall of a limiting groove is in inclined plane arrangement, the notch of the limiting groove is larger than the width of the groove bottom, the width of a blade is gradually reduced along the direction from the upper part to the lower part, and the wall surface of the lower part of the blade is completely attached to the groove wall of the limiting groove.

The indexable turning tool for the driving end screw rod is characterized in that the groove bottom of the limiting groove is provided with the concave avoidance groove, and the bottom surface of the blade extends into the avoidance groove.

The rotatable lathe tool of drive end screw rod, wherein, the blade mounting groove deviates from the one end of top avoidance face, and is located the processing groove of indent has been seted up to the corner between the groove lateral wall of blade mounting groove and the tank bottom, simultaneously, has seted up the corner between groove lateral wall and the groove lateral wall and has dodged the hole, and dodges the pore wall in hole and the notch in processing groove all communicates with the blade mounting groove.

The driving end screw rod indexable turning tool comprises a cutter body, wherein the cutter body is provided with a cutter mounting groove, and the cutter mounting groove is provided with a notch.

The screw rod indexable turning tool for the driving end, wherein the upper part of the blade is provided with the surface of the cutting edge, the height difference is arranged between the middle connecting part and each cutting part, and the middle connecting part is higher than the cutting part, and meanwhile, the arc surface transition is formed between the middle connecting part and the cutting part.

The rotatable turning tool of drive end screw rod, wherein, installation end and processing end's junction just is located and has been offered an auxiliary positioning groove on the face that is provided with the blade mounting groove, and simultaneously, the briquetting deviates from the one end that is provided with the compacting surface and is provided with the lug, and the lug is located the same side of briquetting with the compacting surface, and the lug inlays and locates auxiliary positioning inslot.

The rotatable turning tool of drive end screw rod, wherein, just lie in one side that is provided with compression face and lug on the briquetting still be provided with the centre and dodge the chamber, dodge the chamber in the middle of the mounting hole intercommunication, and compress tightly intermediate junction portion and lug and inlay when locating in the auxiliary positioning groove at the compression face, the chamber is dodged in the middle and is located the top at the position between blade mounting groove and the auxiliary positioning groove.

The driving end screw rod indexable turning tool comprises a pressing block, a pressing surface and a chamfering angle, wherein the pressing block is provided with one end of the pressing surface, and the edge of one side, away from the pressing surface, is provided with the chamfering angle.

The driving end screw rod indexable turning tool comprises a machining end, wherein one side of the machining end is provided with an avoidance surface, and one end, close to the top avoidance surface, extends out of the side projection range of the installation end.

The technical scheme has the positive effects that:

the driving end screw rod indexable turning tool comprises a tool holder and a blade, wherein the tool holder and the blade are arranged in a split mode, the blade mounting groove with a limiting groove is formed in the tool holder, meanwhile, a locking hole is formed in the tool holder and is formed in the side of the blade mounting groove, in addition, a pressing block with a pressing surface is arranged, the pressing block is provided with the mounting hole and is connected with the locking hole through a locking piece, in addition, the blade is of a central symmetry structure, two ends of the blade are cutting parts provided with cutting edges, the independence of the blade is guaranteed, namely the blade can be used continuously after turning around under the condition that the cutting edges are damaged, the blade can be directly replaced without integral replacement, the use cost is reduced, in addition, when the blade is mounted in the blade mounting groove, the lower portion of the blade is embedded in the limiting groove, the upper portion of the blade is pressed by the pressing surface, the blade is pressed by the pressing block with the pressing surface and is limited through the limiting groove, the mounting stability of the blade is improved, the pressing area of the blade is increased, the problem that the blade is shifted, loose and the blade is slipped after the cutting angle is changed is effectively prevented, meanwhile, the service life is prolonged, and the service life is further prolonged.

Drawings

FIG. 1 is a block diagram of a view of an embodiment of a drive-end screw indexable turning tool of the utility model;

FIG. 2 is a block diagram of another view of an embodiment of a drive-end screw indexable turning tool of the utility model;

FIG. 3 is a view of a tool post according to a preferred embodiment of the present utility model;

FIG. 4 is a block diagram showing another view of the tool holder according to a preferred embodiment of the present utility model;

FIG. 5 is a block diagram of a blade according to a preferred embodiment of the present utility model;

fig. 6 is a block diagram of a preferred embodiment of the present utility model.

In the accompanying drawings: 1. a tool apron; 11. a mounting end; 12. a processing end; 111. an auxiliary positioning groove; 121. a mounting surface; 122. a side relief surface; 123. a top relief surface; 124. a blade mounting groove; 125. a limit groove; 126. a locking hole; 127. an avoidance groove; 1241. a processing groove; 1242. avoidance holes; 2. a blade; 21. an intermediate connection portion; 22. a cutting portion; 23. an arc surface; 221. a blade; 3. briquetting; 31. a mounting hole; 32. a compression surface; 33. a bump; 34. a middle avoidance cavity; 35. chamfering; 4. a locking piece.

Description of the embodiments

In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present utility model easy to understand, the following embodiments specifically describe the technical solution provided by the present utility model with reference to fig. 1 to 6, but the following disclosure is not limited to the present utility model.

FIG. 1 is a block diagram of a view of an embodiment of a drive-end screw indexable turning tool of the utility model; fig. 2 is a block diagram of another view of an embodiment of a drive-end screw indexable turning tool of the utility model. As shown in fig. 1 and 2, the driving end screw indexable turning tool provided in this embodiment includes: blade holder 1, blade 2 and briquetting 3, briquetting 3 pass through the fastener to be installed on blade holder 1, and blade 2 compresses tightly on the one end of blade holder 1 through briquetting 3, has realized the installation of blade 2 on blade holder 1, and has also realized the split type setting of blade 2 and blade holder 1, has guaranteed the independence of blade 2 for only singly change blade 2 under the circumstances that cutting edge 221 appears damaging can, need not whole change, compared in the columniform lathe tool of integral type, use cost is lower.

Fig. 3 is a view of the tool holder 1 according to a preferred embodiment of the present utility model; fig. 4 is a block diagram showing another view of the tool holder 1 according to a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 3 and 4, the tool holder 1 has a rod-shaped structure, and in order to improve the mounting stability of the tool holder 1 on the tool holder of the lathe, the tool holder 1 preferably has a square cross section, so that the contact area with the tool holder of the lathe is increased to the greatest extent under the condition of ensuring the sufficient thickness of the tool holder 1, and the mounting stability of the tool holder 1 is improved. At this time, the two ends of the tool apron 1 are respectively provided with a mounting end 11 and a processing end 12, namely the mounting end 11 and the processing end 12 are of an integrated structure, and the mounting end 11 is detachably connected with the tool rest of the lathe, namely the mounting of the turning tool on the tool rest of the lathe is realized through the mounting end 11. In addition, the processing end 12 has a structure with a V-shaped cross section, so that the processing end 12 forms a structure with a mounting surface 121 and side avoidance surfaces 122 positioned on two sides of the mounting surface 121, which is the same as or similar to the thread groove of the thread on the driving end screw to be processed, and better meets the processing requirement of the driving end screw. Meanwhile, the tip end of the processing end 12 is flat-headed to form the top avoidance surface 123, so that the top avoidance surface 123 of the processing end 12 can provide support for the cutting edge 221 of the groove bottom of the thread groove of the driving end screw to be processed on the blade 2 during subsequent processing. And, just be located the one end that is close to the top and dodge the face 123 and seted up concave blade mounting groove 124 on the installation face 121, provide the installation space through blade mounting groove 124 for the installation of blade 2, simultaneously, the spacing groove 125 of indent has been seted up in the bottom of blade mounting groove 124 for blade mounting groove 124 is the blade mounting groove 124 of taking spacing groove 125, and, the groove lateral wall of blade mounting groove 124 all dodges face 122 and top dodge face 123 with the lateral part respectively and run through, for follow-up blade 2 install in blade mounting groove 124 after blade 2's cutting edge 221 can be outstanding in lateral part dodge face 122 and top dodge face 123 and provide the condition. Meanwhile, a locking hole 126 is formed in the mounting surface 121 and beside the blade mounting groove 124, so that conditions are provided for conveniently arranging the pressing block 3 beside the blade mounting groove 124 to press the blade 2.

Fig. 5 is a block diagram of a blade 2 according to a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 5, the blade 2 mounted in the blade mounting groove 124 further includes a middle connecting portion 21 and cutting portions 22 located at two ends of the middle connecting portion 21, that is, the two ends of the blade 2 are the cutting portions 22, at this time, the two cutting portions 22 are arranged in a central symmetry manner with respect to the middle connecting portion 21, so that when the cutting portion 22 at one end of the blade 2 is damaged, the blade 2 can be continuously used through the cutting portion 22 at the other end after being mounted in a turning manner, and the service life of the blade 2 is further prolonged. Meanwhile, the upper edge of each cutting part 22 is arranged in a U shape to form three cutting edges 221, so that the machining efficiency is improved, and the machining method is suitable for machining the groove wall and the groove bottom of the thread groove of the driving end screw to be machined. When the blade 2 is mounted in the mounting groove of the blade 2, the three blades 221 of the cutting part 22 respectively protrude out of the two side avoidance surfaces 122 and the top avoidance surface 123, so that the blades 221 are not shielded by the tool holder 1, and the cutting reliability of the blades 221 is ensured. Meanwhile, the lower part of the blade 2 is embedded in the limit groove 125, namely, the stability of the blade 2 in the blade mounting groove 124 is realized through the limit groove 125, so that the problems of displacement, looseness and slipping of the blade 2 in the blade mounting groove 124 when the cutting angle is changed in the cutting process are prevented, and the safety guarantee is higher.

Fig. 6 is a block diagram of a compact 3 according to a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 6, the middle part of the pressing block 3 is provided with a mounting hole 31 corresponding to the locking hole 126, and meanwhile, a locking piece 4 passes through the mounting hole 31 and then is connected with the locking hole 126, namely, when the locking piece passes through the mounting hole 31 and is connected with the locking hole 126, the pressing block 3 is detachably mounted on the processing end 12, and the pressing and replacement of the follow-up blade 2 are facilitated. In addition, extend the one end of briquetting 3 to in the blade mounting groove 124, and the briquetting 3 extends to the one end in the blade mounting groove 124 and is provided with the compression face 32 of arranging towards in the blade mounting groove 124, and when blade 2 installs in the blade mounting groove 124, compression face 32 compresses tightly on intermediate junction 21, compress tightly blade 2 in blade mounting groove 124 through the compression face 32 of briquetting 3 promptly, the installation stability of blade 2 has been improved, the compression face 32 area of blade 2 has been increased, the problem that blade 2 shift, become flexible and slippage appear after having further prevented to change the cutting angle, the problem that blade 2 surface damage was prevented to the accessible compression face 32 area after the increase has further been prolonged the life of lathe tool, use cost is reduced simultaneously.

More specifically, the groove wall of the limit groove 125 is in inclined arrangement, and the notch of the limit groove 125 is larger than the width of the groove bottom, namely, the limit groove 125 forms a structure with a horn-shaped cross section, so that a limit surface can be provided, guiding can be provided for the installation of the subsequent blade 2, and the blade 2 is conveniently and rapidly installed in the blade installation groove 124. And, in the direction of blade 2 along upper portion to lower part, with the width of blade 2 dwindle gradually for the cross section of the lower part of blade 2 also is loudspeaker form structure, thereby makes after installing blade 2 in blade mounting groove 124, and the wall of the lower part of blade 2 can laminate in spacing groove 125's cell wall completely, thereby realized spacing to blade 2, prevented that blade 2 shift, become flexible and the problem of slippage in the turning process, the safety guarantee nature is higher, has guaranteed machining precision.

More specifically, the groove 127 is dodged to indent has been seted up in the tank bottom of spacing groove 125, and at this moment, dodges the length of groove 127 and the length of spacing groove 125 unanimous to dodge the notch lug connection of groove 127 on the cell wall of spacing groove 125, realized spacing groove 125 promptly and dodged the lug connection of groove 127, made things convenient for the processing to spacing groove 125 promptly, effectively prevented that the corner of inner groove from having the problem of processing dead angle. Meanwhile, the bottom surface of the blade 2 extends into the avoidance groove 127, dust and waste chips are more in the processing environment and are very easy to adhere to the inside of the limit groove 125, and compared with the groove wall of the inclined plane, the groove bottom of the limit groove 125 is easier to adhere to the dust and the waste chips, and even if the dust, the waste chips and the like enter the limit groove 125 through the avoidance groove 127, the dust and the waste chips can adhere to the inside of the avoidance groove 127, so that the lower part of the blade 2 can be more attached to the limit groove 125, and the accuracy of mounting the blade 2 in the blade mounting groove 124 is ensured.

More specifically, the one end of face 123 is dodged at the blade mounting groove 124 deviates from the top, and the processing groove 1241 of indent has still been seted up in the corner between the groove lateral wall of blade mounting groove 124 and the tank bottom, at this moment, processing groove 1241 and spacing groove 125 and dodge the tip intercommunication of groove 127, thereby make in blade mounting groove 124, spacing groove 125 and dodge debris such as interior dust of groove 127, debris can both clear up fast to processing groove 1241, blade mounting groove 124 has been prevented, spacing groove 125 and dodge the problem that groove 127 has the clearance dead angle, the clearance is more thorough. Meanwhile, the corner between the groove side wall and the groove side wall is further provided with an avoidance hole 1242, the hole wall of the avoidance hole 1242 and the notch of the machining groove 1241 are communicated with the blade mounting groove 124, the corner between the groove side wall of the blade mounting groove 124 and the groove side wall cannot be directly machined in the machining process due to the structural limitation of the machining tool, burrs and the like are present, and the corner of the groove 1241 side wall is machined in a punching mode through machining of the avoidance hole 1242, so that machining is more convenient, and structural design is more reasonable.

More specifically, the opening edges of the notches of the blade mounting grooves 124 are arranged in a flaring mode, namely, the sizes of the notches of the blade mounting grooves 124 are expanded, so that the blades 2 are conveniently mounted in the blade mounting grooves 124, the mounting is faster, and the assembly efficiency is higher.

More specifically, the surface of the blade 2 on which the blade edge 221 is disposed is provided with a height difference between the intermediate connecting portion 21 and each cutting portion 22 of the blade 2, and at this time, the intermediate connecting portion 21 is set higher than the cutting portions 22, so that the intermediate connecting portion 21 can be acted on the cutting portions 22 instead of the intermediate connecting portion 21 when the blade 2 is pressed by the pressing block 3, thereby avoiding the influence on the cutting portions 22 of the blade 2. Meanwhile, the arc surface 23 is in transition between the middle connecting part 21 and the cutting part 22, so that the smoothness of the connecting part can be ensured, the problems of chip blocking and the like can be prevented, in addition, the problem of stress concentration can be prevented, and the service life of the blade 2 can be prolonged.

More specifically, an auxiliary positioning groove 111 is further formed at the connection position between the mounting end 11 and the processing end 12 of the tool holder 1 and on the surface provided with the blade mounting groove 124, and one end of the auxiliary positioning groove 111 is communicated with the side wall of the mounting end 11, so that the processing and the subsequent cleaning are facilitated. Meanwhile, the lug 33 is further arranged on the pressing block 3 and located at one end deviating from the pressing surface 32, the lug 33 and the pressing surface 32 are located on the same side of the pressing block 3, namely, when the pressing surface 32 is pressed on the blade 2, the lug 33 is embedded in the auxiliary positioning groove 111, namely, the auxiliary positioning groove 111 is used for limiting the installation of the pressing block 3 on the tool apron 1, the problem that the pressing block 3 follows the rotation of the fastener when the locking piece 4 is screwed is prevented, the installation is more convenient, and the structural design is more reasonable.

More specifically, the middle avoidance cavity 34 is further formed on the pressing block 3 and located on one side where the pressing surface 32 and the protruding block 33 are arranged, at this time, the middle avoidance cavity 34 is of a structure recessed on the pressing block 3, and the mounting hole 31 for mounting the locking piece 4 is communicated with the middle avoidance cavity 34, that is, when the fastener is connected with the locking hole 126 through the mounting hole 31, the end part of the locking piece 4 directly penetrates into the middle avoidance cavity 34. And, when the compression face 32 compresses tightly intermediate connection portion 21 and lug 33 and inlays and locate in the auxiliary positioning groove 111, the intermediate avoidance chamber 34 is located the top at the position between blade mounting groove 124 and the auxiliary positioning groove 111, has reserved enough space through intermediate avoidance chamber 34 and has avoided the position between blade mounting groove 124 and the auxiliary positioning groove 111, has effectively prevented briquetting 3 by the position between blade mounting groove 124 and the auxiliary positioning groove 111 and has made the problem that compression face 32 can't compress tightly blade 2 completely, structural design is more reasonable. It should be noted that the locking member 4 is preferably a screw, and the locking hole 126 is preferably a threaded hole, so that the locking member 4 and the locking hole 126 are convenient to assemble and disassemble, and the blade 2 is more convenient to replace.

More specifically, be provided with the one end of compression face 32 and lie in the edge that deviates from one side of compression face 32 in briquetting 3 and be provided with chamfer 35, make the briquetting 3 be provided with the volume of the one end of compression face 32 littleer promptly through chamfer 35, avoided briquetting 3 to compress tightly the emergence of the collision scheduling problem of the emergence of the one end of blade 2 and messenger's lathe tool when processing, the security is higher.

More specifically, one of the side avoidance surfaces 122 of the processing end 12 of the tool apron 1 extends out of the side projection range of the mounting end 11 for the end, close to the top avoidance surface 123, of the processing end 12, so that the position, where the blade 2 is mounted, of the processing end 12 can extend out of the side wall of the mounting end 11, and when the tool apron 1 is mounted on a tool rest of a lathe, even if the tool rest of the lathe slightly protrudes out of the side wall of the tool apron 1, the blade 2 on the processing end 12 can be smoothly fed relative to a main shaft of the lathe, the collision problem in the feeding process is further avoided, and the structural design is more reasonable.

The driving end screw indexable turning tool provided by the embodiment comprises a tool apron 1, a blade 2 and a pressing block 3; through setting up the lathe tool into blade holder 1 and blade 2, and blade 2 passes through briquetting 3 and installs on blade holder 1, the split type arrangement of lathe tool has been realized, the independence of blade 2 has been guaranteed, and the cutting part 22 at each blade 2 both ends is central symmetry and arranges, make even the cutting edge 221 of blade 2 appear damaging the back and can adopt blade 2 to turn around or change the mode of solitary blade 2 and continue processing, need not the whole lathe tool of changing, use cost has been reduced, and install blade 2 through the blade mounting groove 124 of seting up the limit groove 125 on the blade holder 1, the installation stability of blade 2 has been improved, the tight area 32 products of blade 2 have been increased, thereby the problem that blade 2 shift has appeared after having effectively prevented to change cutting angle, security and reliability have been improved, tight area 32 products after the increase can reduce blade 2 surface damage risk, the whole life of lathe tool is prolonged, the use cost is further reduced.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. A drive-end screw indexable turning tool, comprising:

the tool apron is characterized in that two ends of the tool apron are respectively a mounting end and a processing end, the mounting end is detachably connected with a tool rest of a lathe, a cross section of the processing end is in a V shape to form a mounting surface and side avoidance surfaces positioned on two sides of the mounting surface, meanwhile, the tip of the processing end is flat-headed to form a top avoidance surface, a concave blade mounting groove is formed in the mounting surface and positioned at one end close to the top avoidance surface, a concave limiting groove is formed in the bottom of the blade mounting groove, and a locking hole is formed in the mounting surface and positioned at the side of the blade mounting groove;

the blade comprises a middle connecting part and cutting parts positioned at two ends of the middle connecting part, the two cutting parts are arranged in a central symmetry mode relative to the middle connecting part, meanwhile, the upper edge of each cutting part is arranged in a U shape to form three cutting edges, when the blade is installed in the blade installation groove, the three cutting edges of one cutting part protrude out of the two side avoidance surfaces and one top avoidance surface respectively, and meanwhile, the lower part of the blade is embedded in the limiting groove;

the middle part of briquetting, one offered with the mounting hole that the locking hole corresponds, a retaining member pass behind the mounting hole with the locking hole is connected, the one end of briquetting extends to in the blade mounting groove and be provided with towards the compression face of arranging in the blade mounting groove, and when the blade install in the blade mounting groove, the compression face compress tightly in on the intermediate junction portion.

2. The drive-end screw indexable turning tool of claim 1 wherein the walls of the limit groove are beveled and the notch of the limit groove is greater than the width of the groove bottom, and wherein the blade tapers in width in the upper-to-lower direction, the walls of the lower portion of the blade fully engaging the walls of the limit groove.

3. The drive end screw indexable turning tool of claim 1, wherein the bottom of the limit groove is provided with an inwardly concave avoidance groove, and the bottom surface of the insert extends into the avoidance groove.

4. The drive-end screw indexable turning tool of claim 1, wherein the insert mounting groove is away from one end of the top relief surface, and a recessed machining groove is formed at a corner between a groove side wall and a groove bottom of the insert mounting groove, and simultaneously, a relief hole is formed at a corner between a groove side wall and a groove side wall of the insert mounting groove, and a hole wall of the relief hole and a notch of the machining groove are both communicated with the insert mounting groove.

5. The drive-end screw indexable turning tool of claim 1 wherein the mouth edges of the slots of the insert mounting slots are arranged in a flared configuration.

6. The drive end screw indexable turning tool of claim 1 wherein the upper portion of the insert is provided with a face of the cutting edge, a height difference is provided between the intermediate connecting portion and each of the cutting portions, and the intermediate connecting portion is higher than the cutting portions, while an arcuate surface transition is provided between the intermediate connecting portion and the cutting portions.

7. The driving end screw indexable turning tool according to claim 1, wherein an auxiliary positioning groove is formed in the joint of the mounting end and the processing end and located on the surface provided with the blade mounting groove, meanwhile, a bump is arranged at one end of the pressing block, which is away from the pressing surface, the bump and the pressing surface are located on the same side of the pressing block, and the bump is embedded in the auxiliary positioning groove.

8. The driving end screw indexable turning tool according to claim 7, wherein a middle avoiding cavity is further formed in the pressing block and located on one side provided with the pressing surface and the protruding block, the mounting hole is communicated with the middle avoiding cavity, and when the pressing surface presses the middle connecting portion and the protruding block is embedded in the auxiliary positioning groove, the middle avoiding cavity is located above a portion between the blade mounting groove and the auxiliary positioning groove.

9. The drive-end screw indexable turning tool of claim 1 wherein the press block is provided with one end of the compression face and an edge on a side facing away from the compression face is provided with a chamfer.

10. The drive-end screw indexable turning tool of claim 1 wherein a side relief surface of the working end and an end adjacent the top relief surface extends beyond the side projection of the mounting end.