CN221065559U

CN221065559U - Machine tool cutter height adjusting device

Info

Publication number: CN221065559U
Application number: CN202321470219.9U
Authority: CN
Inventors: 李佩玲; 陈宥腾
Original assignee: Individual
Current assignee: Individual
Filing date: 2023-06-09
Publication date: 2024-06-04
Anticipated expiration: 2033-06-09

Abstract

The height adjusting device comprises a cutter disc, a cutter and an adjusting mechanism, wherein an annular groove is formed in the side face of the cutter disc, an upper mounting part is formed in the part above the annular groove, and a lower mounting part is formed in the part below the annular groove; the section mechanism comprises a first thread sleeve arranged in the counter bore, a second thread sleeve matched with the first thread sleeve, a limiting mechanism used for limiting the rotation of the first thread sleeve and allowing the first thread sleeve to move up and down, and a threaded rod. The utility model realizes the adjustment of the height of the cutter by utilizing the moving height difference of different threads, has high adjustment precision and is easy to realize; the precision is adjustable by changing the pitch of the inner thread and the outer thread of the second thread sleeve.

Description

Machine tool cutter height adjusting device

Technical Field

The utility model relates to the field of metal cutting machining, in particular to a machine tool cutter height adjusting device.

Background

The milling head is generally provided with a plurality of blades on the peripheral surface of the cutterhead for cutting the workpiece, and each blade is required to mill the workpiece when the cutterhead rotates, so that the stress of each blade is ensured to be uniform. However, in practice, the height of the portion of each insert extending beyond the cutterhead varies due to uneven hardness of each portion of the workpiece or the insert beginning to wear during prolonged milling, which results in higher cutting forces being received by the higher inserts and lower inserts being not. The uneven stress can bring load to the machine tool, and meanwhile, the service life of the milling cutter is reduced, and the smoothness of the machined surface of the workpiece is reduced. In order to solve the problem of different heights of cutterheads on the same cutterhead, the existing milling cutter device capable of adjusting the height of blades, such as a milling cutter device with the function of adjusting the height of blades, disclosed in China patent publication No. CN103008748A, comprises a cutterhead body, and a driving shaft hole is arranged at the center of the cutterhead body; at least one cutter placing groove is internally cut on the circumferential surface of the cutter head body and extends to the front side surface of the cutter head body, a cutter holder cutter placing groove is arranged in the cutter placing groove, a cutter blade is fixed on a cutter holder with a chip removing inclined plane at the position corresponding to the cutter holder, and the cutter blade part extends out of the circumferential surface; the tool holder is provided with a constant-height adjusting screw for adjusting the height of the blade. The height of the blade can be adjusted by adjusting the height of the blade by the adjusting screw, but the adjusting precision is limited, and the fine adjustment cannot be achieved by depending on the precision of the adjusting screw.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a machine tool cutter height adjusting device, which has higher cutter height adjusting precision.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a lathe cutter height adjusting device, includes the blade disc, installs the cutter and the actuating mechanism that drives the cutter and reciprocate on the blade disc, the side of blade disc is equipped with the ring channel, the blade disc forms upper mounting portion in the part of ring channel top, the blade disc forms lower mounting portion in the part of ring channel below, the cutter is installed in lower mounting portion, actuating mechanism installs upper mounting portion, upper mounting portion is equipped with the counter bore, lower mounting portion is equipped with the screw hole; the adjusting mechanism comprises a first thread sleeve arranged in the counter bore, a second thread sleeve matched with the first thread sleeve, a limiting mechanism used for limiting the rotation of the first thread sleeve and allowing the first thread sleeve to move up and down, and a threaded rod. The utility model realizes the adjustment of the height of the cutter by utilizing the moving height difference of different threads, and has high adjustment precision and simple realization.

As an improvement, the annular groove comprises a first annular groove which is positioned on the inner side and has a triangular cross section, and a second annular groove which is positioned on the outer side and has a rectangular cross section.

As an improvement, a first nut is arranged above the second thread bush on the threaded rod.

As an improvement, a second nut is arranged below the upper mounting part on the threaded rod.

As an improvement, a third nut is arranged above the lower mounting part on the threaded rod.

As an improvement, cutting grooves are formed between adjacent cutters on the upper mounting portion and the lower mounting portion.

As an improvement, the limiting mechanism comprises a plurality of key grooves formed in the surface of the first thread bush and machine rice screws arranged on the upper mounting part, wherein the machine rice screws are matched with the key grooves.

As an improvement, an adjusting mechanism is arranged on the upper mounting part corresponding to each cutter.

Compared with the prior art, the utility model has the beneficial effects that:

1. The adjusting mechanism and the cutter can be simultaneously arranged on the cutter head, and the machining precision of the cutter head is utilized, so that the mounting precision of the adjusting mechanism is higher, and the stability is better;

2. The second thread sleeve is rotated to enable the threaded rod and the second thread sleeve to move up and down in opposite directions, and the height difference between the second thread sleeve and the threaded rod, which moves reversely, acts on the lower mounting part to enable the lower mounting part to deform and drive the height fine adjustment change of the cutter, so that the adjusting precision is high, and the implementation is simple;

3. The pitch of the inner thread and the outer thread of the second thread sleeve is changed according to the requirement, so that the adjustable precision is realized;

4. the upper mounting part and the lower mounting part are provided with cutting grooves, so that adjacent cutter adjustment interference is reduced.

Drawings

Fig. 1 is a schematic diagram of the cooperation of a cutterhead and a spindle.

Fig. 2 is a top view of the cutterhead.

Fig. 3 is a schematic view of an adjustment mechanism.

Fig. 4 is a cross-sectional view of the cutterhead.

Fig. 5 is a flow chart of the tool height adjustment of the present utility model.

Detailed Description

The utility model is further described below with reference to the drawings.

As shown in fig. 1, a machine tool cutter height adjusting device comprises a cutter head 2, a cutter 4 mounted on the cutter head 2, and an adjusting mechanism 3 for driving the cutter 4 to move up and down, wherein the cutter 4 of the embodiment is mainly a blade mounted on the cutter head 2.

As shown in fig. 1 to 4, a central hole in butt joint with the spindle 1 is formed in the middle of the cutterhead 2, the cutterhead 2 is fixedly connected with the spindle 1 through bolts, and the spindle 1 drives the cutterhead 2 to rotate together. The cutterhead 2 comprises an inner disc and an outer ring, the center hole is formed in the center of the inner disc, the outer ring is arranged at the edge of the inner disc, the thickness of the outer ring is larger than that of the inner disc, and the inner disc and the outer ring are in transition through inclined planes. The outer side face of the outer ring is provided with an annular groove 23, the annular groove 23 comprises a first annular groove which is positioned on the inner side and has a triangular section and a second annular groove which is positioned on the outer side and has a rectangular section, and the annular groove 23 is formed by cutting. The part of the cutterhead 2 above the annular groove 23 forms an upper mounting part 21, the part of the cutterhead 2 below the annular groove 23 forms a lower mounting part 22, the thickness of the upper mounting part 21 and the thickness of the lower mounting part 22 are thinned, elastic deformation occurs after stress, and a stress point is arranged on the inner side of the annular groove 23, so that the inner side of the annular groove 23 is in arc transition. The cutters 4 are arranged on the lower mounting part 22, the cutters 4 are uniformly distributed on the circumference, mounting grooves are formed in the positions, corresponding to the cutters 4, of the lower mounting part 22, and the cutters 4 can be directly fixed in the mounting grooves; in order to reduce the mutual interference between the cutters 4, cutting grooves may be provided between adjacent cutters 4 on the upper and lower mounting portions 21, 22, the cutting grooves being perpendicular to each other in the annular groove 23, and the adjacent cutters 4 being less affected when the height of the corresponding cutter 4 is adjusted by the adjusting mechanism 3. The adjusting mechanism 3 is arranged on the upper mounting part 21, and the adjusting mechanism 3 is arranged on the upper mounting part 21 corresponding to each cutter 4; the adjusting mechanism 3 and the cutter 4 are simultaneously arranged on the cutter head 2, so that the calibration of the position of the adjusting mechanism 3 can be reduced, and the difficulty of processing and installation is reduced. The upper mounting part 21 is provided with a counter bore 24 penetrating through the upper surface and the lower surface, the lower mounting part 22 is provided with a threaded hole 25, and the counter bore 24 corresponds to the threaded hole 25.

As shown in fig. 3, the adjusting mechanism 3 includes a first screw sleeve 35 provided in the counter bore 24, a second screw sleeve 33 engaged with the first screw sleeve 35, a limiting mechanism for limiting the rotation of the first screw sleeve 35 and allowing up-and-down movement, and a threaded rod 31. The first thread bush 35 is cylindrical, the first thread bush 35 is arranged in the counter bore 24, the first thread bush 35 is slightly higher than the counter bore 24 and protrudes out of the top surface of the upper mounting portion 21, the outer wall surface of the first thread bush 35 is smooth, a plurality of key grooves which are uniformly distributed in circumference are arranged on the outer wall surface of the first thread bush 35, the key grooves are directly communicated with the upper end surface, and threaded holes are formed in the first thread bush 35. The second thread bush 33 comprises a rotating head 331 and a thread part 332, the rotating head 331 is hexagonal, a tool acts on the rotating head 331 to pull the second thread bush 33, an external thread is arranged on the outer wall of the thread part 332, the first thread bush 35 is sleeved on the thread part 332 and is in threaded connection with the threaded part 332, the second thread bush 33 is provided with an internal thread hole, the threaded rod 31 passes through the second thread bush 33 and is in threaded connection with the threaded part, and the threaded rod 31 passes through the second thread bush 33 and the counter bore 24 and is connected with the thread hole on the lower mounting part 22. The diameter of the rotating head 331 is larger than that of the threaded portion 332, and a pressing pad 34 is arranged between the rotating head 331 and the first threaded sleeve 35; a first nut 32 is arranged above the second thread bush 33 on the threaded rod 31, and after the first nut 32 is locked, the threaded rod 31 is connected with the second thread bush 33; a second nut 38 is arranged below the upper mounting part 21 on the threaded rod 31, a gasket 37 is arranged between the second nut 38 and the bottom surface of the upper mounting part 21, and the second nut 38 can be locked to limit the rotation of the threaded rod 31; the threaded rod 31 is provided with a third nut 39 above the lower mounting portion 22, and the third nut 39 is locked to restrict rotation of the threaded rod 31. The upper end of the threaded rod 31 is provided with an internal hexagonal hole through which the threaded rod 31 is rotated when it is required to rotate the threaded rod 31 alone. The pitch of the internal and external threads of the second thread bush 33 is different, each time the second thread bush 33 is rotated for one turn, the up-and-down displacement L1 of the threaded rod 31 relative to the second thread bush 33, the up-and-down displacement L2 of the second thread bush 33 relative to the first thread bush 35 is not equal to L2, fine adjustment of the up-and-down displacement of the threaded rod 31 is achieved through the displacement difference, further, the lower mounting part 22 is deformed by pulling force or pushing force, and the height position of the corresponding cutter 4 is changed through local deformation. The limiting mechanism comprises a key groove on the surface of the first thread bush 35 and a machine screw 36 arranged on the upper mounting part 21, and the machine screw 36 is matched with the key groove; the outside of the upper mounting part 21 is provided with an inclined threaded hole, and the machine screw 36 is mounted at the inclined threaded hole.

As shown in fig. 5, the adjustment method of the present utility model comprises the steps of:

(1) Locking the first nut 32, and mutually locking the first thread bush 35, the second thread bush 33, the screw rod and the pressing pad 34 to form an integral assembly;

(2) After the integral assembly is mounted on the upper mounting portion 21, the threaded rod 31 penetrates through the upper mounting portion 21, and then penetrates through the gasket, the second nut 38 and the third nut 39 in sequence in the annular groove 23;

(3) Rotating the threaded rod 31 so that the lower end thereof enters the threaded hole of the lower mounting portion 22 to an appropriate depth;

(4) The first thread bush 35 is limited by a limiting mechanism, so that the first thread bush 35 can only move up and down;

(5) Taking the first nut 32 and the pressing pad 34 out, rotating the second thread bush 33, and enabling the first thread bush 35 to move downwards to a target depth relative to the second thread bush 33, namely, until the lower end of the first thread bush 35 abuts against the bottom surface of the counter bore 24, locking the third nut 39, and preventing the threaded rod 31 from rotating;

(6) Continuing to rotate the second thread bush 33, moving the threaded rod 31 downwards relative to the second thread bush 33, simultaneously moving the second thread bush 33 upwards relative to the first thread bush 35, and realizing fine adjustment of the height movement of the threaded rod 31 by utilizing the height difference between the movement of the threaded rod 31 and the movement of the first thread bush 35;

(7) The height movement fine adjustment of the threaded rod 31 pulls the lower mounting part 22 to deform, so that the height of the cutter 4 is finely adjusted;

(8) After the height adjustment of the cutter 4 is completed, the second nut 38 is locked, the second nut 38 tightens the threaded rod 31, and the threaded rod 31 enables the first thread bush 35 to press against the bottom surface of the counter bore through the second thread bush 33.

The above-described step is to adjust the height of the cutter 4 by pulling the lower mounting portion 22 to deform by the threaded rod 31 by the adjusting mechanism 3. A pressing plate for pressing the first thread bush 35 may be provided on the upper mounting portion 21, the second thread bush 33 is rotated to move the second thread bush 33 and the threaded rod 31 in the direction, and the difference in moving height of the two acts on the lower mounting portion 22 to deform the lower mounting portion 22 upward or downward, so that the height of the cutter 4 is finely adjusted; the lower mounting portion 22 may be deformed by upward pulling or downward pressing of the threaded rod 31 in this way.

Since the heights of all the cutters 4 of the cutter head 2 need to be adjusted, when the heights of the cutters 4 are adjusted by the adjusting mechanism 3, the heights of cutter tips need to be adjusted firstly, and the method comprises the following steps:

1. detecting and recording the blade position height of the cutter head 2;

2. Resetting the tool setting gauge;

3. The blade is fully locked, and the height of the cutter point is detected and recorded;

4. planning a cutter adjusting sequence, adjusting the blade heights on the cutter head 2 according to the height difference from large to small, detecting the cutter point heights of the blades after the first adjustment of all the blades is finished, and adjusting the blades with larger errors.

Claims

1. The utility model provides a lathe cutter height adjusting device, includes blade disc, installs the cutter and the actuating mechanism who drives the cutter and reciprocate on the blade disc, its characterized in that: the side face of the cutter disc is provided with an annular groove, the part of the cutter disc above the annular groove forms an upper mounting part, the part of the cutter disc below the annular groove forms a lower mounting part, the cutter is mounted on the lower mounting part, the adjusting mechanism is mounted on the upper mounting part, the upper mounting part is provided with a counter bore, and the lower mounting part is provided with a threaded hole; the adjusting mechanism comprises a first thread sleeve arranged in the counter bore, a second thread sleeve matched with the first thread sleeve, a limiting mechanism used for limiting the rotation of the first thread sleeve and allowing the first thread sleeve to move up and down, and a threaded rod.

2. A machine tool bit height adjustment device according to claim 1, wherein: the annular grooves comprise a first annular groove which is positioned on the inner side and has a triangular cross section, and a second annular groove which is positioned on the outer side and has a rectangular cross section.

3. A machine tool bit height adjustment device according to claim 1, wherein: and a first nut is arranged above the second thread sleeve on the threaded rod.

4. A machine tool bit height adjustment device according to claim 1, wherein: and a second nut is arranged below the upper mounting part on the threaded rod.

5. A machine tool bit height adjustment device according to claim 1, wherein: and a third nut is arranged above the lower mounting part on the threaded rod.

6. A machine tool bit height adjustment device according to claim 1, wherein: and cutting grooves are formed between adjacent cutters on the upper mounting part and the lower mounting part.

7. A machine tool bit height adjustment device according to claim 1, wherein: the limiting mechanism comprises a plurality of key grooves formed in the surface of the first thread bush and machine rice screws arranged on the upper mounting part, and the machine rice screws are matched with the key grooves.

8. A machine tool bit height adjustment device according to claim 1, wherein: and an adjusting mechanism is arranged on the upper mounting part corresponding to each cutter.