TWM541355U - New structure of spindle cooling and low temperature rise of arbor - Google Patents

Description

New structure with spindle with mandrel cooling and low temperature rise

This creation is about a mandrel cooling structure, especially a new type of structure in which the main shaft of the processing machine is cooled by a mandrel.

Press, when the general processing machine is used for machining, the spindle or the workpiece is rotated by the spindle to perform machining procedures such as cutting and grinding. When the spindle is running, the motor and the bearing will generate heat. If the temperature is not cooled immediately, the spindle will easily be deformed, which will cause errors in the tool when it enters and exits the tool, which will affect the machining accuracy.

Therefore, in order to solve the problem of temperature rise during processing, most of the processing opportunities provide a cooling passage at the outer bushing of the main shaft to allow the coolant to circulate therein for cooling. However, the circulation of the coolant generally cannot be cooled to the inside of the motor coil and the bearing, and it is not possible to directly cool the mandrel, which is liable to cause external heat in the outside.

Furthermore, for the mandrel used to fix the tool, it needs to be indirectly transmitted through the internal parts to dissipate heat, and the heat dissipation effect is limited, and the temperature of the mandrel is still easy to be heated and deformed due to high-speed rotation, which directly causes the tool position to be incorrect. And affect the accuracy.

Therefore, how to improve the cooling of the mandrel and improve the cooling effect to improve the stability of the machining accuracy is yet to be solved by the relevant industry.

In order to solve the above problems, the present invention provides a novel structure in which a spindle with a mandrel is cooled and cooled at a low temperature. By combining a plurality of cooling flow passages on a mandrel, the circulation of the coolant can be used to directly cool the mandrel. To improve the situation of the external cold internal heat, so that the temperature rise and fall of the mandrel is stabilized to improve the stability of the machining accuracy.

In order to achieve the above object, the present invention provides a novel structure for a spindle with a mandrel cooling and low temperature rise, comprising: a main shaft having a bushing, the inside of the bushing is provided with an accommodating space; and a mandrel, which is disposed in the accommodating Space, the mandrel has an opposite end, a tail end and a consistent perforation, the head end is connected to a cutter unit, the tail end is connected to a rotary joint, and the through hole is provided with a cutter rod, wherein the rotary joint is for receiving a coolant; And a plurality of cooling flow channel groups disposed between the outer edge of the mandrel and the through hole, each cooling flow channel group having one of the input flow channels and one output flow channel disposed radially with respect to the main axis, the input channels being opposite to each other Having a first end at the trailing end and a second end opposite the head end, each output flow channel having a third end relative to the trailing end and a fourth end opposite the head end, each first end being Each of the third ends is connected to the rotary joint, and each of the second ends and the fourth ends are in conduction with each other, and the coolant flows into the input flow channels from the first ends, and then flows out from the third ends.

Preferably, each cooling flow channel group is disposed axially with respect to the main shaft, and each cooling flow channel group is straight.

Preferably, the cooling flow path group is disposed around the mandrel at an equal angle of the axis of the main shaft, wherein the number of the cooling flow path groups is one of two groups, three groups or four groups.

Preferably, the present invention has a sealing ring which is sleeved on each of the second end and each of the fourth ends. Each cooling channel group has a communication slot, and each communication slot is connected to each of the second ends and the fourth ends. The seal ring sleeve seals each of the communication slots, wherein each of the communication slots has an opening toward the bushing.

Preferably, the material of the seal ring is one of copper or aluminum.

According to the above, the creation can achieve the effect. The cooling flow channel is set on the mandrel, and the coolant is respectively flown from each first end into each input flow channel, and then flows out from the second end of each output flow channel. In this way, the cooling of the mandrel is directly cooled by the cooling liquid circulation, so as to improve the cooling effect, to avoid the situation of external cooling internal heat, the processing precision is affected, and the low temperature characteristic of the mandrel can be maintained, thereby improving the processing. Precision. In addition, each straight input flow channel and output flow channel can provide rapid circulation of coolant, reduce coolant retention time, and accelerate cooling.

Furthermore, each communication groove is provided with a sealing ring to prevent leakage of the coolant; in addition, since the head end of the mandrel is connected to the cutter, the head end of the mandrel is more likely to generate high temperature during processing, and heat dissipation is not easy. The sealing ring made of copper or aluminum can increase the heat exchange area and increase the cooling effect when the coolant flows through the communication groove.

For the convenience of the description, the central idea expressed in the column of the above novel content is expressed by a specific embodiment. The various items in the examples are drawn to scale in the description and not to the actual elements, and are described in the foregoing.

Referring to FIG. 1 to FIG. 5, the present invention provides a novel structure for a spindle with a mandrel cooling and low temperature rise, which comprises:

A main shaft 10 having a bushing 11 and an inner space of the bushing 11 is provided.

A mandrel 30 is axially disposed in the accommodating space 20 with respect to the axial center O of the main shaft 10. The mandrel 30 has an opposite end portion 31, a tail end 32 and a continuous through hole 33 extending in the direction of the axis O of the main shaft 10, wherein the head end 31 is connected to a cutter unit, and the tail end 32 is coupled to a rotary joint 1 The through hole 33 is provided with a tool pull rod 2, and the tool pull rod 2 is connectable to the claw seat 3, and the claw seat 3 can fix the cutter unit to the head end 31 of the spindle 30, wherein the rotary joint 1 is opposite to the main shaft 10 The axis O rotates to continuously receive a coolant.

The plurality of cooling flow path groups 40 are disposed between the outer edge of the mandrel 30 and the through hole 33. The cooling flow path group 40 is disposed around the mandrel 30 at an equal angle of the axis O of the main shaft 10, wherein the cooling flow path group 40 The number is one of two groups, three groups or four groups. In the present creation, the number of cooling flow channel groups 40 is four, and each cooling flow channel group 40 is annularly disposed on the mandrel 30 at equal angles for cooling. The runner group 40 is disposed around the periphery of the mandrel 30.

Further, each of the cooling flow path groups 40 is disposed in the axial direction of the mandrel 30, and each of the cooling flow path groups 40 is straight. Each of the cooling flow channel groups 40 is provided with a communication groove 41, and one of the input flow channels 42 and one of the output flow channels 43 is disposed at a radial interval with respect to the main shaft 10. Each of the input flow channels 42 has one opposite to the tail end 32. The first end 421 and the second end 422 are opposite to the head end 31. Each of the output flow paths 43 has a third end 431 with respect to the tail end 32 and a fourth end 432 with respect to the head end 31. The first end 421 and the third end 431 are connected to the rotary joint 1 , and the communication slots 41 are disposed at the second end 422 of each input flow channel 42 and the fourth end 432 of each output flow channel 43 , so that each communication groove 41 and each The second end 422 of the input flow path 42 and the fourth end 432 of each of the output flow paths 43 are in communication with each other. The communication grooves 41 are closed or open. In the present creation, each communication groove 41 has a direction toward the bushing 11 The opening.

In addition, each of the first ends 421 and the third ends 431 communicate with the rotary joint 1 , and the coolant flows into the input flow passages 42 from the respective first ends 421 , and flows through the communication passages 41 to the respective output flow passages 43 . The three-end 431 flows out, and the cooling of the mandrel 30 can be directly cooled by the cooling liquid circulation to improve the cooling effect, whereby the temperature of the mandrel 30 can maintain the stability, thereby improving the processing precision; The input flow channel 42 and the output flow channel 43 can provide rapid circulation of the coolant, reduce the residence time of the coolant, and accelerate the cooling effect.

A sealing ring 50 is sleeved on the second end 422 of each input flow path 42 and the fourth end 432 of each output flow path 43. The sealing ring 50 is close to the head end 31 of the mandrel 30, and the sealing ring 50 is closed. Each of the communication grooves 41 prevents the coolant from flowing out from the second end 422 of each input flow path 42 through the communication groove 41 to the fourth end 432 of each of the output flow paths 43 and flows out from the communication groove 41. In the present invention, the seal ring 50 is provided with an O-ring 51 on the upper and lower sides of the communication groove 41, and is sleeved on the outer edge of each of the communication grooves 41 to increase the leakage prevention effect.

Furthermore, the material of the sealing ring 50 is one of copper or aluminum. Since the head end 31 of the mandrel 30 is used to connect the cutter unit, the head end 31 of the mandrel 30 is prone to high temperature during processing operations, and thus is transmitted through copper or The aluminum sealing ring 50 can increase the heat exchange area when the cooling liquid flows through the communication grooves 41, and quickly remove the high temperature of the head end 31 of the mandrel 30, so that the head end 31 of the mandrel 30 can maintain the low temperature. l, it is not easy to affect the processing accuracy, so in addition to preventing the leakage of the coolant, the sealing ring 50 can also achieve the cooling effect to achieve the double cooling effect.

As shown in FIG. 1 and FIG. 3 to FIG. 5, when the rotary joint 1 conveys the coolant from the first ends 421 to the second ends 422 of the input channels 42, and then flows through the communication grooves 41 to the respective output channels. The fourth end 432 of the fourth end 432, and then the coolant is further discharged from each of the third ends 431. At this time, the rotary joint 1 continuously supplies the coolant to the first ends 421, and the coolant is sent to the input channels 42 and Each of the output flow passages 43 is sent out by each of the third ends 431 to continue the cooling cycle. Thereby, each of the cooling flow passage groups 40 is looped to the mandrel 30, and the coolant circulation mode can be directly transmitted to the center. The shaft 30 is cooled to ensure that the mandrel 30 is in a low temperature state, and the stability of the control temperature is achieved, and the temperature fluctuation of the mandrel 30 is prevented from being excessively large, thereby maintaining the machining accuracy.

In addition, when the coolant flows to the communication grooves 41, the seal ring 50 and the two O-rings 51 can enhance the prevention of the outflow of the coolant, and the cooling effect can be improved by the seal ring 50, thereby directly cooling the mandrel 30. The cooling cycle function is combined with the sealing ring 50 to increase the heat exchange area, and the temperature of the head end 31 of the mandrel 30 is lowered to achieve the double cooling effect.

The above embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention. All kinds of modifications or changes that are not in violation of the spirit of this creation are all in the scope of this creative intention.

1‧‧‧Rotary joint
2‧‧‧Tool lever
3‧‧‧Claw seat
10‧‧‧ Spindle
11‧‧‧ bushing
20‧‧‧ accommodating space
30‧‧‧ mandrel
31‧‧‧ head end
32‧‧‧End
33‧‧‧through holes
40‧‧‧Cooling runner group
41‧‧‧Connecting slot
42‧‧‧Input runner
421‧‧‧ first end
422‧‧‧ second end
43‧‧‧Output runner
431‧‧‧ third end
432‧‧‧ fourth end
50‧‧‧Seal ring
51‧‧‧O-ring
O‧‧‧Axis

Figure 1 is a partial cross-sectional view of the machine set in the machine tool. Figure 2 is a perspective view of the cooling runner group of the present invention. Figure 3 is a schematic exploded view of the cooling runner group of the present invention. Figure 4 is a partially enlarged schematic view of Figure 3. Figure 5 is a cross-sectional view taken along line 5-5 of Figure 2 of the present invention.

1‧‧‧Rotary joint

2‧‧‧Tool lever

3‧‧‧Claw seat

10‧‧‧ Spindle

11‧‧‧ bushing

20‧‧‧ accommodating space

30‧‧‧ mandrel

32‧‧‧End

33‧‧‧through holes

40‧‧‧Cooling runner group

41‧‧‧Connecting slot

50‧‧‧Seal ring

51‧‧‧O-ring

O‧‧‧Axis

Claims (10)

A novel structure of a spindle with a mandrel for cooling a low temperature rise, comprising: a main shaft having a bushing, the bushing having an accommodating space therein; a mandrel disposed in the accommodating space, the mandrel having Conversely, a head end, a tail end and a consistent perforation are provided, the head end is connected to a cutter unit, the end end is coupled to a rotary joint, and the through hole is provided with a cutter rod, wherein the rotary joint is configured to receive a coolant; a plurality of cooling flow channel groups disposed between the outer edge of the mandrel and the through hole, each of the cooling flow channel groups having an input flow channel and an output flow path disposed radially apart from the main axis, each of the cooling flow channel groups The input flow channel has a first end relative to the tail end and a second end opposite the front end, each of the output flow channels having a third end relative to the tail end and having a first end relative to the end end a fourth end, each of the first ends and each of the third ends are connected to the rotary joint, and each of the second ends is in conductive communication with each of the fourth ends, and the coolant flows into each of the input streams by the first ends. The road is then flowed out by each of the third ends. The spindle spindle with a mandrel as claimed in claim 1 cools the low temperature rise, wherein each of the cooling runner groups is disposed relative to the axial direction of the spindle. The spindle shaft with a mandrel as claimed in claim 1 or 2 cools the novel structure of the low temperature rise, wherein each of the cooling flow passage groups is straight. The spindle shaft with a mandrel as claimed in claim 3 is configured to cool the low temperature rise, wherein the cooling runner groups are disposed around the mandrel at an equal angle of the axis of the spindle. The spindle shaft with a mandrel as claimed in claim 4 cools the novel structure of the low temperature rise, wherein the number of the cooling runner groups is one of two groups, three groups or four groups. The spindle shaft with a mandrel as claimed in claim 1 is configured to cool the low temperature rise, wherein a sealing ring is further disposed on each of the second end and each of the fourth ends. A novel structure for cooling a low temperature rise of a spindle with a mandrel as claimed in claim 6, wherein each of the cooling flow path groups has a communication groove, and each of the communication grooves communicates with each of the second ends and the fourth ends. The spindle shaft with a mandrel as claimed in claim 7 cools the low temperature rise structure, wherein the seal ring sleeve seals each of the communication grooves. The spindle spindle with a mandrel as claimed in claim 7 cools the novel structure of the low temperature rise, wherein each of the communication grooves has an opening toward the bush. The spindle shaft with a mandrel as claimed in claim 6 cools the novel structure of the low temperature rise, wherein the material of the seal ring is one of copper or aluminum.