CN215902747U

CN215902747U - Boring cutter for speed reducer shell and machining device

Info

Publication number: CN215902747U
Application number: CN202122387880.0U
Authority: CN
Inventors: 时敬龙; 岳巍; 李云朋; 黄维祥; 罗驰; 韩家明; 吴佩玲; 曹磊
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-02-25
Anticipated expiration: 2031-09-30

Abstract

The utility model belongs to the technical field of production and manufacturing of automobile parts, and discloses a boring cutter and a machining device for a speed reducer shell. The boring cutter is used for processing a first shaft hole of the reducer shell, a boss tappet is arranged at the center of the first shaft hole, a connecting piece is arranged at one end of the body of the boring cutter, the connecting piece can be connected to a machine tool, and a positioning shaft and a positioning key are respectively arranged at intervals in the axial direction of the other end of the body in a protruding mode; the cutter assembly comprises a cutter bar and a boring cutter head, one end of the cutter bar, which is close to the body, is provided with a positioning hole and a positioning groove, the positioning shaft penetrates through the positioning hole, the positioning key is clamped in the positioning groove, one end of the cutter bar, which is far away from the body, is provided with an avoiding groove, the avoiding groove is used for avoiding a boss tappet, the avoiding groove and the positioning hole are communicated through a transition hole, the boring cutter head is detachably connected to the cutter bar, and the boring cutter head is used for processing and forming a first shaft hole; the locking piece can pass through the transition hole and the positioning shaft respectively. The boring cutter is low in production cost and high in machining efficiency.

Description

Boring cutter for speed reducer shell and machining device

Technical Field

The utility model relates to the technical field of production and manufacturing of automobile parts, in particular to a boring cutter and a machining device for a speed reducer shell.

Background

With the continuous progress of society and the continuous improvement of living standard of people, in order to meet better use requirements of people, the requirements on the production cycle and the precision of automobile parts are higher and higher.

When the reducer casing of the hybrid electric vehicle is produced and processed, a bearing hole needs to be processed on the reducer casing for mounting a bearing. The dead eye includes first shaft hole and the second shaft hole that communicates each other, and first shaft hole is the ultra-deep hole, and the diameter in first shaft hole is about 110mm, and the degree of depth is about 370mm, and surface roughness is 0.8um, and the second shaft hole is the reverse side coaxial hole in first shaft hole, and the diameter in second shaft hole is about 60mm, and the axiality in first shaft hole and second shaft hole is 0.02 mm. Because the boss tappet is arranged at the center of the first shaft hole, the customized overlong milling cutter is required to be used for interpolation processing or the customized special avoidance type fine boring cutter is required to be used for avoidance processing.

The existing processing mode has the following defects:

1. the non-calibrated reverse boring cutter has a long purchase period, influences the production progress of the shell of the speed reducer, cannot meet the requirement of rapid trial-manufacture verification, and has high price, thus causing high production cost;

2. after the milling cutter is adopted for interpolation machining, the tolerance and the roughness of the hole position cannot be guaranteed, and the machining precision is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a boring cutter for a speed reducer shell and a machining device, which are high in machining precision, low in production cost and high in machining efficiency.

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

a boring cutter for a reducer case, which is used for processing a first shaft hole of the reducer case, wherein a boss tappet is arranged at the center of the first shaft hole, and the boring cutter for the reducer case comprises:

the body penetrates through the reducer shell, a connecting piece is arranged at one end of the body and can be connected to a machine tool, and a positioning shaft and a positioning key are convexly arranged at intervals at the other end of the body along the axial direction of the body;

the cutter assembly comprises a cutter bar and a boring cutter head, one end of the cutter bar, which is close to the body, is provided with a positioning hole and a positioning groove, the positioning shaft penetrates through the positioning hole, the positioning key is clamped in the positioning groove, one end of the cutter bar, which is far away from the body, is provided with an avoiding groove, the avoiding groove is used for avoiding the boss tappet, the avoiding groove and the positioning hole are communicated through a transition hole, the boring cutter head is detachably connected to the cutter bar, and the boring cutter head is used for processing and forming the first shaft hole;

a retaining member capable of passing through the transition aperture and the positioning shaft, respectively, for detachable connection between the body and the cutter assembly.

Preferably, an installation groove is formed in the outer wall of the cutter bar, and the installation groove is used for installing the boring cutter head.

Preferably, the boring head includes:

the tool rest is provided with a first mounting hole, the bottom of the mounting groove is provided with a second mounting hole, and mounting pieces are respectively arranged in the first mounting hole and the second mounting hole in a penetrating manner;

the blade is arranged on the tool apron.

Preferably, the boring head further comprises an adjusting member, and the adjusting member is respectively arranged in the tool holder and the blade in a penetrating manner and can adjust the position of the blade relative to the tool holder.

Preferably, a limiting column is arranged in the mounting groove and abuts against the tool apron for limiting the tool apron.

Preferably, the outer wall of the cutter bar is provided with a balance groove, and the balance groove and the mounting groove are symmetrically arranged relative to the axial direction of the cutter bar.

Preferably, a threaded hole is formed in the positioning shaft, and the locking piece penetrates through the threaded hole and is in threaded connection with the threaded hole.

Preferably, the height of the positioning shaft which is convexly arranged on the end face of the body is greater than the height of the positioning key which is convexly arranged on the end face of the body.

Preferably, the connecting member is inserted through the body and is slidable relative to the body.

In order to achieve the above object, the present invention further provides a processing apparatus, which includes a machine tool, a reverse boring tool and the boring tool for the reducer casing, wherein the machine tool is detachably connected to the boring tool for the reducer casing and the reverse boring tool, the boring tool for the reducer casing is used for processing a first shaft hole of the reducer casing, the reverse boring tool is used for processing a second shaft hole of the reducer casing, and the first shaft hole and the second shaft hole are coaxially arranged and communicated with each other.

The utility model has the beneficial effects that:

according to the boring cutter for the speed reducer shell, the connecting piece is arranged at one end of the body and can be connected to a machine tool, so that the body is fixed, and the stability of the boring cutter is guaranteed. Preferably, the connecting piece wears to locate the body and can slide for the body, makes the connecting piece have multiple back-drawn length for match the lathe main shaft, in order to guarantee the connection locking effect of body.

The other end at the body is equipped with location axle and navigation key along its axial direction protruding the being equipped with in interval respectively, the one end that is close to the body at the cutter arbor is provided with locating hole and constant head tank, wear to locate the locating hole through the location axle, the location axle is pegged graft each other with the locating hole to the degree of freedom of restriction cutter unit spare, the navigation key joint is in the constant head tank, guarantee the location effect between body and the cutter unit spare, the tolerance and the roughness that make first shaft hole are within predetermineeing the within range, thereby guarantee the machining precision of retarder housing's dead eye.

The cutter bar is far away from the one end of the body and is provided with a dodging groove, the diameter of the dodging groove is larger than that of the boss tappet, the dodging groove is used for dodging the boss tappet, the center dodging function is achieved, the bearing hole of the tappet is formed in the middle of the boring cutter machining, therefore, hole site tolerance is guaranteed, the customized boring cutter is solved, the customization period is long, the price is high, and the problem that precision cannot be met by milling cutter interpolation machining is solved.

The boring cutter head is detachably connected to the cutter bar and provided with a plurality of sets of different diameters, the boring cutter head is replaced according to the diameter required by the first shaft hole to adapt to the size required by the bearing hole, the universality is good, the non-standard boring cutter customizing time is saved, and the machining efficiency is greatly improved.

Through dodging to be provided with the transition hole between groove and the locating hole, the retaining member can pass transition hole and location axle respectively, when guaranteeing that the retaining member does not interfere the boss tappet, can also realize dismantling between body and the cutter unit and connect, the cutter unit's of being convenient for change.

The utility model also provides a processing device which is detachably connected with the boring cutter and the reverse boring cutter used for the reducer shell through a machine tool respectively, wherein the boring cutter is used for processing the first shaft hole of the reducer shell, and the reverse boring cutter is used for processing the second shaft hole of the reducer shell.

Drawings

FIG. 1 is a schematic view of the engagement of a boring tool for a retarder housing and a retarder housing of the present invention;

FIG. 2 is a schematic structural view of a boring cutter for a reducer case according to the present invention;

FIG. 3 is an exploded view from one perspective of the boring tool for a reducer housing of the present invention;

fig. 4 is an exploded view from another perspective of the boring tool for a reducer case according to the present invention.

In the figure:

101. a reducer housing; 1011. a first shaft hole; 1012. a boss tappet;

1. a body; 2. a cutter assembly; 3. a locking member;

11. a connecting member; 12. positioning the shaft; 121. a threaded hole; 13. a positioning key;

21. a cutter bar; 211. positioning holes; 212. positioning a groove; 213. an avoidance groove; 214. a transition hole; 215. mounting grooves; 216. a balancing tank;

22. a boring cutter head; 221. a tool apron; 222. a blade; 223. an adjustment member; 224. a mounting member;

23. a limiting column.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1, the present embodiment provides a processing device for processing a bearing hole of a reducer housing 101, wherein the bearing hole includes a first shaft hole 1011 and a second shaft hole which are coaxially arranged and mutually communicate. The machining device comprises a machine tool, a boring cutter and a reverse boring cutter, wherein the boring cutter and the reverse boring cutter are used for the reducer shell, the machine tool is detachably connected with the boring cutter and the reverse boring cutter which are used for the reducer shell respectively, the boring cutter used for the reducer shell is used for machining a first shaft hole 1011 of the reducer shell 101, and the reverse boring cutter is used for machining a second shaft hole of the reducer shell 101.

During machining, a boring cutter for the reducer housing is mounted on a machine tool, a first shaft hole 1011 is machined in the reducer housing 101 through the boring cutter for the reducer housing, after the first shaft hole 1011 is machined, the boring cutter is detached from the machine tool, then an anti-boring cutter is mounted on a main shaft of the machine tool, and a second shaft hole is machined in the reducer housing 101 through the anti-boring cutter, so that machining of the ultra-deep bearing hole is completed.

The embodiment provides a processing device, can dismantle respectively through the lathe and connect in the boring cutter and the anti-boring cutter that are used for the reduction gear casing, the boring cutter is used for processing reduction gear casing 101's first shaft hole 1011, and anti-boring cutter is used for processing reduction gear casing 101's second shaft hole, simple structure, preparation and convenient to use, low cost.

Because the boss tappet 1012 is arranged at the center of the first shaft hole 1011, the customized ultra-long milling cutter is needed to perform interpolation processing or the customized special avoidance type fine boring cutter is needed to perform avoidance processing, and the problems of low working efficiency, low processing precision, high production cost and the like exist.

In order to solve this problem, as shown in fig. 2 to 4, the present embodiment provides a boring tool for a reducer case, the boring tool includes a body 1, a tool assembly 2 and a locking member 3, the body 1 is made of a high-speed steel material, and has good wear resistance and strength, the body 1 penetrates through the reducer case 101, a connecting member 11 is provided at one end of the body 1, and the connecting member 11 can be connected to a machine tool.

Through being provided with connecting piece 11 in the one end of body 1, connecting piece 11 can connect in the lathe, realizes the fixed of body 1 to guarantee the stability of boring cutter. Preferably, the connecting piece 11 is arranged through the body 1 and can slide relative to the body 1, so that the connecting piece 11 has various back-pull lengths for matching with a machine tool spindle to ensure the connection locking effect of the body 1.

The cutter assembly 2 is a set of replacement set, the cutter assembly 2 comprises a cutter bar 21 and a boring cutter head 22, the other end of the body 1 is respectively provided with a positioning shaft 12 and a positioning key 13 at intervals in the axial direction, one end of the cutter bar 21 close to the body 1 is provided with a positioning hole 211 and a positioning groove 212, the positioning shaft 12 penetrates through the positioning hole 211, and the positioning key 13 is clamped in the positioning groove 212. Through the locating shaft 12 wear to locate locating hole 211, locating shaft 12 pegs graft each other with locating hole 211 to restriction cutter unit 2's degree of freedom, location key 13 joint in constant head tank 212 guarantees the location effect between body 1 and the cutter unit 2, makes the tolerance and the roughness of primary shaft hole 1011 within predetermineeing the scope, thereby guarantees the machining precision of reducer housing 101's dead eye.

Wherein, the protruding height that locates body 1 terminal surface of location axle 12 is greater than the protruding height of locating body 1 terminal surface of location key 13, wears to locate the locating hole 211 with location axle 12 earlier, realizes initial positioning, then location key 13 joint in constant head tank 212, realizes smart location and fixed.

Offer at the cutter arbor 21 one end of keeping away from body 1 and dodge groove 213, the diameter of dodging groove 213 is greater than the diameter of boss tappet 1012, dodges groove 213 and is used for dodging boss tappet 1012, realizes that the center dodges the function, has the dead eye of boss tappet 1012 in the middle of this boring cutter workable to guarantee the hole site tolerance, solve the customization boring cutter, lead to customization cycle length, high price, and use milling cutter interpolation processing can't satisfy the problem of precision.

A boring head 22 is detachably attached to the tool bar 21, and the boring head 22 is used to machine and form a first shaft hole 1011. The boring cutter head 22 has a plurality of sets of different diameters, the boring cutter head 22 is replaced according to the diameter required by the first shaft hole 1011 to adapt to the size required by the bearing hole, the universality is good, the non-standard boring cutter customizing time is saved, and the processing efficiency is greatly improved.

Dodge and be linked together through transition hole 214 between groove 213 and the locating hole 211, through dodging being provided with transition hole 214 between groove 213 and the locating hole 211, retaining member 3 can pass transition hole 214 and location axle 12 respectively, when guaranteeing that retaining member 3 does not interfere boss tappet 1012, can also realize dismantling between body 1 and the cutter unit 2 and be connected, the change of the cutter unit 2 of being convenient for.

The locking member 3 is specifically a socket head cap screw, the locking member 3 can respectively pass through the transition hole 214 and the positioning shaft 12, and is used for detachable connection between the body 1 and the cutter assembly 2, wherein the transition hole 214 is a counter bore formed after the socket head cap screw is screwed down.

Preferably, a threaded hole 121 is formed in the positioning shaft 12, the locking member 3 is inserted into the threaded hole 121 and is in threaded connection with the threaded hole, and an inner hexagon screw penetrates through the transition hole 214 and is screwed into the internal thread, so that the locking of the tool assembly 2 is realized.

Preferably, body 1 includes dead lever and extension bar, and the one end of dead lever is connected in connecting piece 11, and the other end is connected in the extension bar, is provided with location axle 12 and location key 13 on the terminal surface of extension bar, and the extension bar has played elongated effect, and the extension bar is the stack cover that length is different, chooses assorted extension bar model for use according to the depth of processing of dead eye to realize high regulatory function.

Further, an installation groove 215 is formed in an outer wall of the cutter bar 21, the installation groove 215 is specifically a right-angled through groove formed in the axial direction of the cutter bar 21, the installation groove 215 is used for installing the boring cutter head 22, and the installation groove 215 provides an installation position for the boring cutter head 22 so as to install the boring cutter head 22.

Specifically, the boring head 22 is made of an aluminum alloy material, so that the weight reduction of the cutter and the quick modification of the cutter can be realized. The boring cutter head 22 comprises a cutter holder 221 and a cutter blade 222, a first mounting hole is formed in the cutter holder 221, a second mounting hole is formed in the bottom of the mounting groove 215, the mounting piece 224 penetrates through the first mounting hole and the second mounting hole respectively, the mounting piece 224 is specifically a screw, one of the first mounting hole and the second mounting hole is a through hole, the other mounting hole is a threaded hole, a screw connection mode is adopted, the fixing effect is good, the mounting and the dismounting are convenient, and the boring cutter head 22 is convenient to replace. The holder 221 is provided with an insert 222, and the holder 221 functions to mount the insert 222. The boring cutter head 22 is suitable for boring and machining of forward coaxial holes, achieves modularization and diameter adjusting functions, and is high in practicability and good in effect.

The number of the mounting members 224, the first mounting holes and the second mounting holes is plural, and the plurality of mounting members 224 correspondingly penetrate through the plurality of first mounting holes and the plurality of second mounting holes one to one. It is understood that the number of the mounting members 224 is not limited in the present embodiment, and can be adjusted according to actual production requirements.

The boring head 22 further includes an adjusting member 223, the adjusting member 223 is specifically an adjusting screw, the adjusting member 223 respectively penetrates through the tool holder 221 and the blade 222 and can adjust the position of the blade 222 relative to the tool holder 221, so as to perform a fine adjustment function, and further improve the connection stability of the tool holder 221 and the blade 222.

In order to ensure that the boring head 22 can be mounted in the mounting groove 215 in a proper position, a position-limiting post 23 is provided in the mounting groove 215, and the position-limiting post 23 abuts against the tool holder 221 for limiting the tool holder 221. When the boring cutter head 22 is installed, the boring cutter head 22 slides into the installation groove 215 from one side of the installation groove 215, which is far away from the body 1, until the cutter holder 221 of the boring cutter head 22 abuts against the limiting column 23, so that the initial positioning of the cutter holder 221 is realized, and the positioning effect is good.

A balance groove 216 is formed on the side of the cutter bar 21 away from the mounting groove 215, and the balance groove 216 and the mounting groove 215 are symmetrically arranged with respect to the axial direction of the cutter bar 21. The balance groove 216 specifically is a right-angle through groove formed in the axial direction of the cutter bar 21, the mounting groove 215 and the balance groove 216 are symmetrical grooves, the balance groove 216 plays a role in balancing the rotation of the cutter assembly 2, and the eccentric rotation of the cutter assembly 2 is avoided.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A boring tool for a reducer case, for processing a first shaft hole (1011) of a reducer case (101), a boss tappet (1012) is provided at the center of the first shaft hole (1011), characterized in that the boring tool for a reducer case comprises:

the main body (1) penetrates through the speed reducer shell (101), a connecting piece (11) is arranged at one end of the main body (1), the connecting piece (11) can be connected to a machine tool, and a positioning shaft (12) and a positioning key (13) are respectively arranged at the other end of the main body (1) at intervals in the axial direction;

the cutter assembly (2), the cutter assembly (2) comprises a cutter bar (21) and a boring cutter head (22), one end of the cutter bar (21) close to the body (1) is provided with a positioning hole (211) and a positioning groove (212), the positioning shaft (12) penetrates through the positioning hole (211), the positioning key (13) is clamped in the positioning groove (212), one end of the cutter bar (21) far away from the body (1) is provided with an avoiding groove (213), the avoiding groove (213) is used for avoiding the boss tappet (1012), the avoiding groove (213) and the positioning hole (211) are communicated through a transition hole (214), the boring cutter head (22) is detachably connected to the cutter bar (21), and the boring cutter head (22) is used for processing and forming the first shaft hole (1011);

a retaining member (3), the retaining member (3) being capable of passing through the transition aperture (214) and the positioning shaft (12), respectively, for detachable connection between the body (1) and the cutter assembly (2).

2. The boring cutter for a reducer case according to claim 1, wherein an installation groove (215) is opened on an outer wall of the cutter bar (21), the installation groove (215) being used for installing the boring cutter head (22).

3. The boring cutter for a reducer case according to claim 2, characterized in that the boring head (22) comprises:

the tool holder (221) is provided with a first mounting hole, the bottom of the mounting groove (215) is provided with a second mounting hole, and a mounting piece (224) is arranged in the first mounting hole and the second mounting hole in a penetrating mode respectively;

and a blade (222) provided on the holder (221).

4. The boring cutter for a reducer housing according to claim 3, characterized in that the boring head (22) further comprises an adjusting piece (223), the adjusting piece (223) being respectively pierced through the cutter holder (221) and the blade (222) and being capable of adjusting the position of the blade (222) relative to the cutter holder (221).

5. The boring tool for the reducer housing according to claim 3, wherein a limiting post (23) is provided in the mounting groove (215), the limiting post (23) abutting against the tool holder (221) for limiting the tool holder (221).

6. The boring tool for a reducer housing according to claim 2, wherein a balance groove (216) is opened on an outer wall of the cutter bar (21), and the balance groove (216) and the mounting groove (215) are symmetrically arranged with respect to an axial direction of the cutter bar (21).

7. The boring cutter for the reducer housing according to claim 1, characterized in that a threaded hole (121) is formed in the positioning shaft (12), and the locking member (3) is inserted through the threaded hole (121) and is in threaded connection therewith.

8. The boring tool for the reducer housing according to claim 1, wherein the height of the positioning shaft (12) protruding from the end surface of the body (1) is greater than the height of the positioning key (13) protruding from the end surface of the body (1).

9. The boring tool for a housing of a retarder according to claim 1, characterised in that the connecting piece (11) is pierced through the body (1) and is slidable with respect to the body (1).

10. A machining apparatus comprising a machine tool, a reverse boring tool and the boring tool for a decelerator housing according to any one of claims 1 to 9, wherein the machine tool is detachably connected to the boring tool for the decelerator housing and the reverse boring tool, respectively, the boring tool for the decelerator housing is used for machining a first shaft hole (1011) of the decelerator housing (101), and the reverse boring tool is used for machining a second shaft hole of the decelerator housing (101), wherein the first shaft hole (1011) and the second shaft hole are coaxially arranged and communicate with each other.