CN214867802U

CN214867802U - But coping formula thread machining cutter

Info

Publication number: CN214867802U
Application number: CN202121397308.6U
Authority: CN
Inventors: 李府; 赵正强
Original assignee: Sichuan Daoqin Cutting Tools Co ltd
Current assignee: Sichuan Daoqin Cutting Tools Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-11-26
Anticipated expiration: 2031-06-23

Abstract

The utility model discloses a but coping formula thread machining cutter relates to machine tooling cutter technical field. Provided is a repairable thread processing tool which can be repeatedly used in grinding and can be simply ground. The cover cutter comprises a cutter bar, a cutting strip, a fixing screw and a driving gear; the cutter bar is horizontally arranged, the front part of the cutter bar is provided with a cutting bar hole and a gear hole positioned behind the cutting bar hole, the cutting bar hole extends from the top surface of the cutter bar to the rear lower direction, the front side wall surface of the cutting bar hole is a V-shaped positioning surface, and the middle part of the rear side wall surface of the cutting bar hole is a rear middle positioning surface; the cutting strip is inserted into the cutting strip hole, the front surface of the cutting strip is provided with two rear tool faces, the rear side of the cutting strip is provided with a cutting strip rear positioning face, and two sides of the cutting strip rear positioning face are provided with racks; the rear cutter face is attached to the V-shaped positioning face, and the rear positioning face of the cutting strip is attached to the rear middle positioning face; the driving gear is arranged in the gear hole and is meshed with the rack, and the end part of the driving gear is provided with a rotating structure; the fixing screw is connected with the cutter bar and compresses the cutting strip.

Description

But coping formula thread machining cutter

Technical Field

The utility model relates to a machine tooling cutter technical field especially relates to a but coping formula thread machining cutter.

Background

The high-speed steel cutter bar is a traditional thread machining cutter and is still widely applied at present. The high-speed steel knife strip is characterized in that when the knife edge is worn or broken, the knife edge can be ground again, so that the high-speed steel knife strip can be continuously used, and the use cost is low. However, when the conventional high-speed steel cutter bar is ground, a tooth-shaped angle needs to be ground, a plurality of surfaces need to be ground, the grinding difficulty is high, the technical requirements on a grinder are high, and the application range and the prospect of the thread machining cutter are influenced.

Zl200910030146.x discloses a threading tool mechanism, the head of which is substantially the same as the high-speed steel blade, and although grinding can be performed, the grinding difficulty is large.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provided is a repairable thread processing tool which can be repeatedly used in grinding and can be simply ground.

The technical scheme adopted for solving the problems is as follows: a thread processing cutter capable of being polished comprises a cutter bar, a cutting strip, a fixing screw and a driving gear; the cutter bar is horizontally arranged, the front part of the cutter bar is provided with a cutting bar hole and a gear hole positioned behind the cutting bar hole, the cutting bar hole extends from the top surface of the cutter bar to the rear lower direction, the front side wall surface of the cutting bar hole is a V-shaped positioning surface, the middle part of the rear side wall surface of the cutting bar hole is a rear middle positioning surface, and two sides of the rear middle positioning surface are tooth sockets; the cutting strip is inserted into the cutting strip hole, the front surface of the cutting strip is provided with two rear tool faces, the top surface of the cutting strip is a front tool face, the intersection line of the rear tool faces and the front tool face is a cutting edge, the included angle of the two rear tool faces is matched with the thread profile angle, the rear side of the cutting strip is provided with a cutting strip rear positioning face, and two sides of the cutting strip rear positioning face are racks higher than the cutting strip rear positioning face; the rear cutter face is attached to the V-shaped positioning face, the rear positioning face of the cutting strip is attached to the rear middle positioning face, and the rack is positioned in the tooth groove; the driving gear is arranged in the gear hole and can rotate, the driving gear is meshed with the rack, and the end part of the driving gear is provided with a rotating structure; the fixing screw is vertical to the cutting strip, and the fixing screw is connected with the cutter bar and compresses the cutting strip.

Further, the method comprises the following steps: the utility model provides a but coping formula thread machining cutter includes the bearing, and drive gear includes gear body and the installation axle that is located gear body both sides, and the bearing is installed in the gear hole, and the installation axle is installed in the bearing.

Further, the method comprises the following steps: the rotating structure is arranged on the end surface of the mounting shaft and is a wrench hole.

Further, the method comprises the following steps: the left and right side surfaces of the cutting strip are attached to the left and right side walls of the cutting strip hole.

Further, the method comprises the following steps: the included angle between the axis of the cutting strip hole and the axis of the cutter rod is 60 degrees.

Further, the method comprises the following steps: the side surface of the cutting strip is provided with position mark scales arranged along the length direction of the cutting strip.

The utility model has the advantages that: 1. when the cutting edge is worn or broken, the fixing screw is loosened, the driving gear is rotated, and the driving gear drives the cutting strip to move upwards so as to expose the cutter bar more. The cutting strip may then be subjected to abrasive repair. Because of the front surface of cutting strip is two back knife faces, and the contained angle of two back knife faces matches for with screw thread profile angle, during the grinding, need not grind back knife face, also need not grind out the profile angle, only need grind the top surface of cutting strip and grind out cutting edge and rake face again can. The utility model discloses a grind obviously more simple and convenient many than prior art, not high to grinder's technical requirement, can practice thrift grinding time. The method is beneficial to wider application of the grinding type thread processing cutter.

2. The cutting strip is as long as leave sufficient fixed length, and all the other parts all can be ground and use, consequently the utility model discloses the length that can grind the use is very long, can grind many times, and cutting strip live time is long to can not influence the intensity of cutting strip after grinding.

Drawings

FIG. 1 is a perspective view of a repairable thread cutting tool;

FIG. 2 is a front elevational view of the repairable thread cutting tool;

FIG. 3 is a top view of the front of the refurbished thread cutting tool;

FIG. 4 is a front cross-sectional view of the repairable thread cutting tool;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

FIG. 6 is a cross-sectional view A-A of FIG. 2;

labeled as: the cutter bar comprises a cutter bar 1, a cutting strip hole 11, a V-shaped positioning surface 12, a rear middle positioning surface 13, a tooth groove 14, a gear hole 15, a cutting strip 2, a rear cutter surface 21, a front cutter surface 22, a cutting edge 23, a cutting strip rear positioning surface 24, a rack 25, position mark scales 26, a fixing screw 3, a driving gear 4, a gear main body 41, a mounting shaft 42, a rotating structure 43 and a bearing 5.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1 to 6, a coping type thread machining tool includes a tool bar 1, a cutting bar 2, a set screw 3, and a driving gear 4; the cutter bar 1 is horizontally arranged, the front part of the cutter bar 1 is provided with a cutting strip hole 11 and a gear hole 15 positioned behind the cutting strip hole 11, the cutting strip hole 11 extends from the top surface of the cutter bar 1 to the rear lower direction, the front side wall surface of the cutting strip hole 11 is a V-shaped positioning surface 12, the middle part of the rear side wall surface of the cutting strip hole 11 is a rear middle positioning surface 13, and two sides of the rear middle positioning surface 13 are tooth sockets 14; the cutting strip 2 is inserted into the cutting strip hole 11, the front surface of the cutting strip 2 is provided with two rear cutter surfaces 21, the top surface of the cutting strip 2 is provided with a front cutter surface 22, the intersection line of the rear cutter surfaces 21 and the front cutter surface 22 is a cutting edge 23, the included angle of the two rear cutter surfaces 21 is matched with the thread form angle, the rear side of the cutting strip 2 is provided with a cutting strip rear positioning surface 24, and two sides of the cutting strip rear positioning surface 24 are provided with racks 25 higher than the cutting strip rear positioning surface 24; the rear cutter face 21 is attached to the V-shaped positioning face 12, the rear positioning face 24 of the cutting strip is attached to the rear middle positioning face 13, and the rack 25 is positioned in the tooth groove 14; the driving gear 4 is installed in the gear hole 15 and can rotate, the driving gear 4 is meshed with the rack 25, and the end part of the driving gear 4 is provided with a rotating structure 43; the fixing screw 3 is vertical to the cutting strip 2, and the fixing screw 3 is connected with the cutter bar 1 and compresses the cutting strip 2.

When the cutting edge 23 is worn or chipped, the fixing screw 3 is loosened, the driving gear 4 is rotated, and the driving gear 4 is engaged with the rack 25, so that the driving gear 4 drives the cutting strip 2 to move upward to expose more of the cutter bar 1. The cutting strip 2 may then be subjected to abrasive repair. Because the front surface of cutting strip 2 is two flank faces 21, and the contained angle of two flank faces 21 matches for with screw thread profile angle, during the grinding, need not grind flank face 21, also need not grind out the profile angle, only need grind the top surface of cutting strip 2 and grind cutting edge 23 and rake face 22 again. The utility model discloses a grind obviously more simple and convenient many than prior art, not high to grinder's technical requirement, can practice thrift grinding time. The method is beneficial to wider application of the grinding type thread processing cutter.

The different thread profile angles are different, for example, 60 ° for a metric triangular thread, 30 ° for a metric trapezoidal thread, 29 ° for an acme female trapezoidal thread, 55 ° for an english hui triangular thread, and the included angle of the two flank surfaces 21 of the cutting strip 2 can be designed to be different depending on the thread to be cut.

The utility model discloses rely on set screw 3 to compress tightly cutting strip 2, make rake face 22 support tight V-arrangement locating surface 12, rely on frictional force to prevent that cutting strip 2 from removing. When the thread machining is carried out, the workpiece gives a downward force to the cutting strip 2, the force enables the cutting strip 2 to move backwards and downwards, but the rake face 22 is enabled to be more tightly pressed against the V-shaped positioning face 12; meanwhile, the rear positioning surface 24 of the cutting strip is attached to the rear middle positioning surface 13, so that the swinging of the cutting strip 2 is limited; the fixing is reliable.

The driving gear 4 is used for driving the cutting strip 2 to move, so that the position adjustment of the cutting strip 2 is more convenient and accurate. The rack 25 is higher than the cutting strip rear positioning surface 24 in order to avoid that the cutting strip rear positioning surface 24 blocks the driving gear 4, so that the driving gear 4 cannot be installed.

The specific structure and mounting manner of the driving gear 4 are as follows: a sharpening type thread machining cutter comprises a bearing 5, a driving gear 4 comprises a gear body 41 and mounting shafts 42 located on two sides of the gear body 41, the bearing 5 is installed in a gear hole 15, and the mounting shafts 42 are installed in the bearing 5. The bearing 5 may be a sliding bearing or a rolling bearing.

The purpose of the rotating structure 43 is to facilitate the rotation of the driving gear 4. The rotating structure 43 is preferably: the rotating structure 43 is disposed on the end surface of the mounting shaft 42, and the rotating structure 43 is a wrench hole. The drive gear 4 can be rotated by inserting an existing wrench into the wrench hole.

The flank surface 21 abuts against the V-shaped positioning surface 12 to prevent the lateral movement and the swinging of the cutting chip 2, and in order to further improve the positioning effect, it is preferable that the left and right side surfaces of the cutting chip 2 are fitted to the left and right side walls of the cutting chip hole 11.

If the cutting strip 2 is vertically arranged, the cutting edge 23 cannot exceed the front end of the cutter bar 1, so that cutting is difficult to realize, and the angle of the flank surface 21 does not meet the requirement. If the cutting strip 2 is horizontally arranged, it cannot be conveniently ground. Therefore, the utility model discloses a cutting strip 2 is the slope setting, just also requires cutting strip hole 11 to extend from 1 top surface of cutter arbor to lower direction backward. In general, the angle between the axis of the cutter bar hole 11 and the axis of the cutter bar 1 is preferably 60 °.

The length of the cutting strip 2 exposed out of the upper surface of the cutter bar 1 is proper, if the length is too short, the length of the cutting edge 23 is not enough, and if the length is too long, the stability of the cutter is poor. In order to facilitate the control of the length of the cutting strip 2 exposed from the upper surface of the holder 1, it is preferable that the cutting strip 2 has a position mark 26 on the side surface thereof along the length direction of the cutting strip 2. The scale 26 is marked by observing the position of the exposed cutter bar 1, and the insertion depth of the cutting strip 2 is controlled, namely the length of the cutting strip 2 exposed on the upper surface of the cutter bar 1 can be controlled.

The utility model discloses a material that cutter arbor 1 can use conventional cutter arbor is made. The cutting bar 2 may be made of high speed steel or cemented carbide.

Claims

1. A thread machining tool capable of being polished comprises a tool bar (1); the method is characterized in that: comprises a cutting strip (2), a fixing screw (3) and a driving gear (4); the cutter bar (1) is horizontally arranged, the front part of the cutter bar (1) is provided with a cutting strip hole (11) and a gear hole (15) positioned behind the cutting strip hole (11), the cutting strip hole (11) extends from the top surface of the cutter bar (1) to the rear lower direction, the front side wall surface of the cutting strip hole (11) is a V-shaped positioning surface (12), the middle part of the rear side wall surface of the cutting strip hole (11) is a rear-middle positioning surface (13), and two sides of the rear-middle positioning surface (13) are tooth grooves (14); the cutting strip (2) is inserted into the cutting strip hole (11), the front surface of the cutting strip (2) is provided with two rear cutter faces (21), the top surface of the cutting strip (2) is provided with a front cutter face (22), the intersection line of the rear cutter faces (21) and the front cutter face (22) is a cutting edge (23), the included angle of the two rear cutter faces (21) is matched with the thread profile angle, the rear side of the cutting strip (2) is provided with a cutting strip rear positioning face (24), and two sides of the cutting strip rear positioning face (24) are racks (25) higher than the cutting strip rear positioning face (24); the rear cutter face (21) is attached to the V-shaped positioning face (12), the rear positioning face (24) of the cutting strip is attached to the rear middle positioning face (13), and the rack (25) is located in the tooth groove (14); the driving gear (4) is installed in the gear hole (15) and can rotate, the driving gear (4) is meshed with the rack (25), and the end part of the driving gear (4) is provided with a rotating structure (43); the fixing screw (3) is vertical to the cutting strip (2), and the fixing screw (3) is connected with the cutter bar (1) and compresses the cutting strip (2).

2. A repairable screw thread machining tool according to claim 1, characterized in that: including bearing (5), drive gear (4) include gear main part (41) and be located gear main part (41) both sides installation axle (42), and bearing (5) are installed in gear hole (15), and installation axle (42) are installed in bearing (5).

3. A repairable screw thread machining tool according to claim 2, characterized in that: the rotating structure (43) is arranged on the end surface of the mounting shaft (42), and the rotating structure (43) is a wrench hole.

4. A repairable screw thread machining tool according to claim 3, characterized in that: the left and right side surfaces of the cutting strip (2) are attached to the left and right side walls of the cutting strip hole (11).

5. The repairable screw thread machining tool according to claim 4, wherein: the included angle between the axis of the cutting strip hole (11) and the axis of the cutter bar (1) is 60 degrees.

6. The repairable screw thread machining tool according to claim 5, wherein: the side surface of the cutting strip (2) is provided with a position mark scale (26) arranged along the length direction of the cutting strip (2).