CN211101630U

CN211101630U - Processing machine main shaft with cooling structure

Info

Publication number: CN211101630U
Application number: CN201921500362.1U
Authority: CN
Inventors: 李佩玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-07-28
Anticipated expiration: 2029-09-10

Abstract

The utility model relates to a processing machine main shaft of utensil cooling structure contains: a sleeve; the rotating shaft can be pivotally arranged on the sleeve in a penetrating mode and comprises a cooling section and a combining section which are arranged along the axial direction; and the cooling ring piece is fixedly arranged on the sleeve and is sleeved on the cooling section of the rotating shaft along the axial direction, and comprises a cooling spiral channel, an input hole and an output hole which are communicated with the cooling spiral channel, and the cooling spiral channel and the outer surface of the cooling section form a cooling flow channel, so that cooling liquid can block heat generated during the processing of the main shaft from being transferred to the inside when flowing in the cooling flow channel, the bearing is prevented from being damaged due to overheating, and meanwhile, a heat source generated by the bearing can be taken away from the rotating shaft during high-speed rotation, so that the heat displacement caused by the high-rotating-speed temperature rise of the main shaft is reduced.

Description

Processing machine main shaft with cooling structure

Technical Field

The present invention relates to a spindle of a processing machine, and more particularly to a spindle of a processing machine with a cooling structure.

Background

As shown in fig. 1, a partial state diagram of a spindle 10 of a general processing machine combined with a tool holder 100 is shown, the spindle 10 is mainly formed by sleeving a plurality of bearings 12 outside a rotating shaft 11 and penetrating into a sleeve 13, and a protective cover 14 is arranged on an end portion of the sleeve 13 and is used for the rotating shaft 11 to penetrate through, when the spindle is operated, the sleeve 13 and the protective cover 14 are in a fixed state, and the rotating shaft 11 drives the tool holder 100 to rotate relative to the sleeve 13.

Since high-speed machining (high-speed cutting machining or high-speed grinding machining) can shorten the manufacturing time, improve the machining accuracy, and reduce the cost, the machining technology is actively developed and applied to high-speed machining. However, when the spindle 10 of the processing machine performs high-speed processing operation, the rotating shaft 11 is mainly driven by a motor (not shown) to rotate so as to drive the tool holder 100 to rotate synchronously, and further, the processing cutter 101 on the tool holder 100 performs processing operation such as cutting and grinding on a workpiece, so that the heat generated by the processing is transmitted to the inside of the spindle as the rotating shaft 11 rotates faster and the processing time is longer, and the temperature of the bearing 12 of the rotating shaft 11 is higher, so that the generated heat not only causes the bearing 12 to be overheated and damaged, but also causes the thermal displacement generated by the temperature rise of the rotating shaft 11 to affect the processing precision, that is, the thermal displacement is larger as the temperature rise is larger as the rotating speed of the spindle 10 is higher, and the processing precision is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a processing machine main shaft of utensil cooling structure mainly blocks the heat that the main shaft produced during processing and leads to inside, avoids the bearing overheated and impaired.

Another object of the present invention is to provide a processing machine spindle with a cooling structure, which is mainly used for reducing the thermal deflection caused by the temperature rise of the bearing when the spindle is at a high rotation speed.

To achieve the above object, the present invention provides a processing machine spindle with a cooling structure, comprising: a sleeve; the rotating shaft can be pivotally arranged on the sleeve in a penetrating mode and comprises a cooling section and a combining section which are arranged along the axial direction; and the cooling ring piece is fixedly arranged on the sleeve and is sleeved on the cooling section of the rotating shaft along the axial direction, and comprises an outer ring surface, an inner ring surface opposite to the outer ring surface, a cooling spiral channel which is concavely arranged on the inner ring surface, an input hole which penetrates through the inner ring surface and the outer ring surface and is communicated with the cooling spiral channel, and an output hole which penetrates through the inner ring surface and the outer ring surface and is communicated with the cooling spiral channel, and the cooling spiral channel and the outer surface of the cooling section form a cooling flow channel.

The utility model has the advantages that: the sleeve is provided with the cooling ring piece, and the cooling ring piece and the rotating shaft form a cooling flow channel, so that when the rotating shaft rotates at a high speed, cooling liquid can be input into the cooling flow channel through the input hole, the cooling liquid flows in the cooling flow channel and is output through the output hole, and the cooling liquid can block heat generated by machining from being transferred into the main shaft when flowing in the cooling flow channel.

Preferably, the rotating shaft further has a pivot section located inside the sleeve, the cooling section is disposed between the pivot section and the combining section, and a plurality of bearings are disposed between the pivot section and the inside of the sleeve. Therefore, the cooling ring piece and the rotating shaft form a cooling flow passage, so that the temperature of the main shaft can be reduced by the cooling liquid flowing in the cooling flow passage, the bearings are cooled and cooled nearby, and the bearings on the pivoting section are prevented from being overheated and damaged.

Preferably, the input hole of the cooling ring is farther away from the joining section of the rotating shaft than the output hole.

Preferably, the cooling ring further has two leak-proof ring grooves concavely formed on the inner ring surface, the two leak-proof ring grooves are respectively located on two sides of the cooling spiral channel, each leak-proof ring groove is respectively connected with a leak-proof gasket, and each leak-proof gasket is in airtight contact with the outer surface of the cooling section. So as to prevent the cooling liquid flowing in the cooling flow passage from seeping out from between the rotating shaft and the cooling ring piece.

Preferably, the output hole of the cooling ring piece faces the processing position, so that the cooling liquid can be sprayed to the processing position.

Drawings

FIG. 1 is a partial state view of a spindle of a general machining center in combination with a tool holder;

fig. 2 is a partial perspective view of an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a perspective view of an embodiment of the present invention showing the cooling ring in a three-dimensional position; and

fig. 5 is a usage state diagram of the embodiment of the present invention.

Description of the symbols in the drawings:

the prior art is as follows:

spindle 10 rotating shaft 11

Bearing 12 sleeve 13

Holder 14 handle 100

Machining cutter 101

The utility model discloses:

the accommodation space 21 of the sleeve 20

The positioning ring portion 22 rotates the shaft 30

Cooling section 32 of pivot section 31

Bonding segment 33 cooling ring 40

Outer ring surface 41 and inner ring surface 42

Cooling spiral channel 43 inlet hole 44

Outlet 45 cooling channel 46

Leakage-proof ring groove 47 cooling liquid conduit 50

Inlet end 51 and outlet end 52

Screw 63 of positioning ring piece 62

Leakproof gasket 64 bearing 66

Knife handle 67 cutter head 68

Axial direction X of workpiece 69

Detailed Description

The technical solution of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 2 to 4, an embodiment of the present invention provides a processing machine spindle with a cooling structure, which mainly comprises a sleeve 20, a rotating shaft 30, and a cooling ring 40, wherein:

the sleeve 20 has an accommodating space 21.

The rotating shaft 30 can be pivotally inserted in the sleeve 20, and includes a pivot section 31, a cooling section 32 and a combining section 33 sequentially arranged along the axial direction X, wherein two bearings 66 are disposed between the pivot section 31 and the sleeve 20, so that the rotating shaft 30 can rotate at a high speed relative to the sleeve 20, the cooling section 32 is disposed outside the sleeve 30, the cooling section 32 is disposed between the pivot section 31 and the combining section 33, the combining section 33 is disposed outside the sleeve 20, the combining section 33 is used for combining and driving the tool holder 67, and the tool holder is provided with a tool pan 68, which is as shown in fig. 5.

A cooling ring 40 fixed to the sleeve 20 and sleeved on the cooling section 32 of the rotating shaft 30 along the axial direction X, in this embodiment, the cooling ring 40 is locked to the sleeve 20 by screws 63, the cooling ring 40 includes an outer annular surface 41, an inner annular surface 42 opposite to the outer annular surface 41, a cooling spiral channel 43 recessed from the inner annular surface 42, an input hole 44 penetrating through the inner and outer

annular surfaces

41, 42 and communicating with the cooling spiral channel 43, and an output hole 45 penetrating through the inner and outer

annular surfaces

41, 42 and communicating with the cooling spiral channel 43, and the cooling spiral channel 43 and the outer surface of the cooling section 32 form a cooling flow channel 46; in this embodiment, the input hole 44 of the cooling ring 40 is further away from the connecting section 33 of the rotating shaft 30 than the output hole 45, and the cooling ring 40 further has two anti-leakage ring grooves 47 recessed from the inner annular surface 42, and the two anti-leakage ring grooves 47 are respectively located at two sides of the cooling spiral channel 43, and each anti-leakage ring groove 47 is respectively connected with a anti-leakage gasket 64, and each anti-leakage gasket 64 is in airtight contact with the outer surface of the cooling section 32 of the rotating shaft 30. To prevent the coolant flowing in the cooling channel 46 from seeping between the rotating shaft 30 and the cooling ring 40.

The above description is the structure and configuration description of the main components of the embodiment of the present invention. The operation and efficacy of the present invention will be described below.

Since the cooling ring member 40 is sleeved on the cooling section 32 of the rotating shaft 30, and the cooling ring member 40 and the rotating shaft 30 form the cooling flow passage 46, in the present invention, when the rotating shaft 30 is rotated at a high speed for machining, the cooling fluid can be supplied from the supply holes 44 of the cooling ring 40 to the cooling passages 46, the cooling liquid flows in the cooling flow passage 46 and is output from the output hole 45, and when the cooling liquid flows in the cooling flow passage 46, since the coolant is in direct contact with the outer surface of the cooling section 32 of the rotating shaft 30, therefore, the coolant may block heat generated by machining from being transferred to the inside of the main shaft while flowing through the cooling flow passage 46, and particularly the pivot section 31 of the rotating shaft 30, and, in addition, the cooling fluid flowing through the cooling flow passage 46 can lower the temperature of the rotating shaft 30, and then the adjacent bearings 66 are cooled and cooled, so as to avoid the overheating damage of the bearings 66 on the pivot joint section 31.

It is worth mentioning that, as shown in fig. 5, the present invention can direct the output hole 45 of the cooling ring member 40 toward the processing position (an adapter can also be connected) when performing the processing operation, and when the cooling fluid flowing through the cooling flow channel 46 is output through the output hole 45 of the cooling ring member 40, the cooling fluid can be directly sprayed to the processing position of the main shaft of the processing machine under the control of pressure, so as to reduce the temperature of the cutter head 68 and the workpiece 69 during the processing, so as to obtain better thermal control parameters and improve the production efficiency.

In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A spindle of a processing machine having a cooling structure, comprising:

a sleeve;

the rotating shaft can be pivotally arranged on the sleeve in a penetrating mode and comprises a cooling section and a combining section which are arranged along the axial direction; and

and the cooling ring piece is fixedly arranged on the sleeve and is sleeved on the cooling section of the rotating shaft along the axial direction, and comprises an outer ring surface, an inner ring surface opposite to the outer ring surface, a cooling spiral channel which is concavely arranged on the inner ring surface, an input hole which penetrates through the inner ring surface and the outer ring surface and is communicated with the cooling spiral channel, and an output hole which penetrates through the inner ring surface and the outer ring surface and is communicated with the cooling spiral channel, and the cooling spiral channel and the outer surface of the cooling section form a cooling flow channel.

2. The processing machine spindle with a cooling structure as claimed in claim 1, wherein the rotating shaft further has a pivot section located inside the sleeve, the cooling section is disposed between the pivot section and the coupling section, and a plurality of bearings are disposed between the pivot section and the inside of the sleeve.

3. The tooling spindle of claim 1 wherein the input aperture of the cooling ring is further from the joining section of the rotational axis than the output aperture.

4. The processing machine spindle with cooling structure as claimed in claim 1, wherein the cooling ring further has two anti-leaking ring grooves recessed from the inner circumferential surface, the two anti-leaking ring grooves are respectively located at two sides of the cooling spiral channel, each anti-leaking ring groove is respectively connected with an anti-leaking gasket, and each anti-leaking gasket is in airtight contact with the outer surface of the cooling section.

5. A machine spindle having a cooling structure according to claim 1, wherein the outlet of the cooling ring is directed towards the machining site to spray the cooling liquid towards the machining site.