Boring cutter assembly with automatic cooling function

Abstract

The utility model discloses an automatic cooling boring cutter assembly which comprises a cutter bar and a boring and grinding head, an oilstone seat capable of being pushed by an adjusting cone to expand is arranged in the boring and grinding head, the adjusting cone is hollow, a transmission shaft is installed on one side of the boring and grinding head through a cooling liquid chamber, and an electric push rod is arranged in the transmission shaft. And an air chamber and a liquid chamber are arranged in the cooling liquid chamber. According to the boring cutter assembly with the automatic cooling function, the adjusting cone is pushed through the electric push rod, a gap is generated between the sealing head and the adjusting cone while the adjusting cone expands the oilstone base, and cutting fluid or cooling liquid is fed into the adjusting cone from the gap between the sealing head and the adjusting cone under the hydraulic effect through the cooling liquid and distributed on the oilstone to be cooled; the purpose of automatic supply is achieved, the electric push rod and the cooling liquid supply equipment can be controlled by a machine tool to operate synchronously to achieve the effect of synchronous starting and stopping, and convenience is provided for boring and grinding through the built-in cooling liquid supply mode and automatic control.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of boring bar assemblies of automatic cooling in the field of mechanical remanufacturing technology. BACKGROUND

[0002] Honing, also known as boron grinding, is a finishing process for precision machining surfaces using oil stones (also known as honing bars) embedded in a honing head. During honing, the workpiece is mounted on a honing bed worktable or a fixture, and the honing head with several oil stone bars is inserted into the machined hole. The honing head is driven to rotate and move axially by the main shaft of the machine tool. The oil stone bars contact the hole wall with a certain pressure, cutting off a very thin layer of metal. The honing head is generally connected to the main shaft in a floating manner.

[0003] In large and medium-sized mechanical processing enterprises, a centralized circulation system can be used to supply cutting fluid or cooling fluid to multiple machining equipment and to process waste chips. This method can reduce labor intensity and improve the working environment of the production workshop. The cooling fluid can carry away heat during honing. The current honing cooling method is to connect the cooling fluid pipe to the inside of the workpiece for cooling, which limits the honing reciprocating motion range and affects the cooling fluid distribution effect, resulting in an affected cooling effect of the cooling fluid. Therefore, a boring bar assembly with automatic cooling is proposed. SUMMARY

[0004] The utility model aims at providing a boring bar assembly with automatic cooling to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A boring bar assembly with automatic cooling includes a tool bar and a honing head. The honing head is internally provided with an oil stone seat that can be expanded by an adjusting cone. The inside of the adjusting cone is hollow. A transmission shaft is installed on one side of the honing head through a cooling liquid chamber. An electric push rod is arranged inside the transmission shaft. A gas chamber and a liquid chamber are arranged inside the cooling liquid chamber. A sealing head capable of sealing the hollow inside the adjusting cone is installed in the liquid chamber. The liquid chamber is connected to a cooling liquid external pipeline. The electric push rod is fixed to the adjusting cone through a connecting shaft. The electric push rod moves the adjusting cone by pushing it through the connecting shaft, creating a gap between the sealing head and the adjusting cone. The cooling liquid is delivered to the honing head through the gap.

[0007] As a further scheme of the utility model, a water outlet hole is formed on the adjusting cone, and the honing head is provided with a water outlet nozzle. The cooling liquid is output from the water outlet hole and the water outlet nozzle through the hollow of the adjusting cone.

[0008] As a further scheme of the utility model: the knife bar and transmission shaft are connected through the infusion shaft, the outer side of the infusion shaft is provided with a rotatable slip ring, a ring-shaped cavity is formed in the inside of the slip ring, and the outer side of the slip ring is provided with a cooling liquid input pipeline in communication with the ring-shaped cavity in the inside of the slip ring.

[0009] As a further scheme of the utility model: the inside of the infusion shaft is provided with a cooling liquid hole, the input of the cooling liquid external pipeline is in communication with the cooling liquid hole, and the cooling liquid enters the liquid chamber through the cooling liquid hole and the cooling liquid external pipeline.

[0010] As a further scheme of the utility model: the infusion shaft and the knife bar are both provided with a labyrinth seal clamp ring, the labyrinth seal clamp ring limits the slip ring, the slip ring and the clamp ring are rotatably connected, and the slip ring and the infusion shaft are connected through a bearing.

[0011] As a further scheme of the utility model: the output shaft of the electric push rod is provided with a mounting seat in the inside of the cooling liquid chamber, a connecting shaft is mounted on the mounting seat, the number of the connecting shafts is two and they are symmetrically distributed, and the sealing head is located at the center position.

[0012] As a further scheme of the utility model: the knife bar and the infusion shaft are mutually inserted and fixed through bolts.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The automatic cooling boring cutter assembly drives the adjusting cone through the electric push rod, generates a gap between the sealing head and the adjusting cone while expanding the oil stone seat, sends the cutting fluid or the cooling liquid into the adjusting cone from the gap between the sealing head and the adjusting cone under the action of the hydraulic pressure, distributes the cutting fluid or the cooling liquid on the oil stone to cool, achieves the purpose of automatic supply, and realizes the synchronous start-stop effect through the synchronous operation of the electric push rod and the cooling liquid supply equipment under the control of the machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a structural schematic view of an automatic cooling boring cutter assembly.

[0016] Fig. 2 It is a structural front view of an automatic cooling boring cutter assembly.

[0017] Fig. 3 It is a structural sectional view of an automatic cooling boring cutter assembly.

[0018] In the figure: 1, the cutter bar; 2, the boring and grinding head; 3, the cooling liquid input pipeline; 4, the slip ring; 5, the clamping ring; 6, the liquid delivery shaft; 7, the cooling liquid external pipeline; 8, the transmission shaft; 9, the cooling liquid chamber; 10, the cooling liquid hole; 11, the electric push rod; 12, the mounting seat; 13, the connecting shaft; 14, the sealing head; 15, the adjusting cone; 16, the water outlet nozzle; 17, the water outlet hole. DETAILED DESCRIPTION

[0019] Please refer to Figs. 1-3 In the embodiment of the utility model, a kind of boring cutter assembly of automatic cooling, including cutter bar 1 and boring and grinding head 2, oilstone seat that can be expanded by adjusting cone 15 is arranged inside boring and grinding head 2, the inside of adjusting cone 15 is hollow, one side of boring and grinding head 2 is installed transmission shaft 8 by cooling liquid chamber 9, electric push rod 11 is arranged in the inside of transmission shaft 8, gas chamber and liquid chamber are arranged in the inside of cooling liquid chamber 9, sealing head 14 that can seal the hollow inside adjusting cone 15 is installed in liquid chamber, liquid chamber is connected with cooling liquid external pipeline 7, electric push rod 11 is fixed with adjusting cone 15 by connecting shaft 13, electric push rod 11 moves adjusting cone 15 by connecting shaft 13, and gap is generated between sealing head 14 and adjusting cone 15, cooling liquid is transported to boring and grinding head 2 by gap, the technical scheme that cutter bar 1, boring and grinding head 2 and electric push rod 11 drive oilstone seat to expand outward is prior art, and here is not repeated, based on the present application, increase built-in cooling liquid supply structure, set up the inside of boring cutter assembly with external cooling liquid supply pipeline, effectively solve the problem that honing reciprocating range is limited, and by the control end control of machine tool, the cooling liquid supply of cooling liquid external pipeline 7 originates from cutting fluid or cooling liquid supply system of prior art, cutting fluid or cooling liquid is sent into cooling liquid external pipeline 7 according to certain pressure, the controller of machine tool controls electric push rod 11 and cooling liquid supply synchronous operation, electric push rod 11 pushes adjusting cone 15, and at the same time that adjusting cone 15 expands oilstone seat, gap is generated between sealing head 14 and adjusting cone 15, and cutting fluid or cooling liquid is sent into adjusting cone 15 from the gap between sealing head 14 and adjusting cone 15 under the action of hydraulic pressure, and is distributed to oilstone and is cooled, reaches the purpose of automatic supply.

[0020] In a preferred embodiment, water outlet hole 17 is opened in adjusting cone 15, boring and grinding head 2 is provided with water outlet nozzle 16, and cooling liquid is output from water outlet hole 17 and water outlet nozzle 16 through the hollow of adjusting cone 15, cutting fluid or cooling liquid enters boring and grinding head 2 from water outlet hole 17 in the hollow of adjusting cone 15, and is sprayed from water outlet nozzle 16, and is contacted and cooled in the process of oilstone rotation, forms circulation, and the position of cutting fluid or cooling liquid distribution is more accurate, controllable and uniform by the distribution of water outlet nozzle 16.

[0021] In a preferred embodiment, the knife bar 1 is connected with the transmission shaft 8 through the liquid delivery shaft 6, the outer side of the liquid delivery shaft 6 is provided with a rotatable slip ring 4, the inner side of the slip ring 4 is provided with a cooling liquid input pipeline 3, the liquid delivery shaft 6 is one of the transmission shaft components, which needs to rotate with the knife bar 1 and the transmission shaft 8, and the liquid delivery shaft 6 needs to keep supplying cooling liquid during rotation, so the slip ring 4 is arranged, the slip ring 4 rotates on the outer side of the liquid delivery shaft 6, the cooling liquid input pipeline 3 supplies cutting fluid or cooling liquid into the slip ring 4, and the cutting fluid or cooling liquid has a certain hydraulic pressure in the slip ring 4, so as to be transmitted into the cooling liquid hole 10 of the liquid delivery shaft 6.

[0022] In a preferred embodiment, the inner side of the liquid delivery shaft 6 is provided with the cooling liquid hole 10, the input of the cooling liquid external pipeline 7 is communicated with the cooling liquid hole 10, the cooling liquid is input into the liquid chamber through the cooling liquid hole 10 and the cooling liquid external pipeline 7, and the cutting fluid or cooling liquid is supplied to the end close to the transmission shaft 8, the transmission shaft 8 is internally provided with the electric push rod 11, so the cutting fluid or cooling liquid can be transported through the cooling liquid external pipeline 7, and the external part can be used for maintenance and further technical improvement.

[0023] In a preferred embodiment, the liquid delivery shaft 6 and the knife bar 1 are both provided with the labyrinth seal clamp ring 5, the labyrinth seal clamp ring 5 limits the slip ring 4, the slip ring 4 is rotatably connected with the clamp ring 5, and the slip ring 4 is connected with the liquid delivery shaft 6 through a bearing, the labyrinth seal refers to the seal between the rotating part and the fixed part, which has many tortuous small rooms to reduce leakage, is an ideal labyrinth flow channel model, and is provided with a plurality of annular sealing teeth arranged in sequence around the rotating shaft, a series of interception gaps and expansion cavities are formed between the teeth, and the sealed medium generates throttling effect when passing through the gaps of the tortuous labyrinth, so as to achieve the purpose of leakage prevention.

[0024] In a preferred embodiment, the output shaft of the electric push rod 11 is provided with the mounting seat 12 located in the cooling liquid chamber 9, the mounting seat 12 is provided with the connecting shaft 13, the number of the connecting shaft 13 is two and the connecting shaft 13 is symmetrically distributed, the sealing head 14 is located at the center position, the knife bar 1 and the liquid delivery shaft 6 are inserted into each other and are fixed through bolts, one end of the knife bar 1 is provided with a slot, one end of the liquid delivery shaft 6 is inserted into the slot to form a connection and is locked through a bolt, the positions between the two clamp rings 5 are fixed, and the sealing property between the slip ring 4 and the clamp ring 5 is maintained.

[0025] It should be noted that the above embodiments all belong to the same utility model concept, the descriptions of the embodiments have different focuses, and the descriptions not described in detail in individual embodiments can be referred to the descriptions in other embodiments.

[0026] The above-described embodiments only express the implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as the limitation of the scope of the present application patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An automatically cooled boring tool assembly, comprising a tool holder (1) and a boring head (2), wherein the boring head (2) has an oilstone seat that can be expanded by an adjusting cone (15), characterized in that, The interior of the adjusting cone (15) is hollow. A drive shaft (8) is installed on one side of the boring head (2) through the coolant chamber (9). An electric push rod (11) is installed inside the drive shaft (8). The coolant chamber (9) is equipped with an air chamber and a liquid chamber. A sealing head (14) that can seal the hollow interior of the adjusting cone (15) is installed in the liquid chamber. The liquid chamber is connected to an external coolant pipeline (7). The electric push rod (11) is fixed to the adjusting cone (15) through the connecting shaft (13). The electric push rod (11) pushes the adjusting cone (15) to move through the connecting shaft (13), so that a gap is created between the sealing head (14) and the adjusting cone (15). The coolant is delivered to the boring head (2) through the gap.

2. The automatically cooled boring tool assembly according to claim 1, characterized in that, The adjusting cone (15) has a water outlet hole (17), and the boring head (2) is equipped with a water outlet nozzle (16). Coolant is output from the water outlet hole (17) and the water outlet nozzle (16) through the hollow of the adjusting cone (15).

3. The automatically cooled boring tool assembly according to claim 1, characterized in that, The tool holder (1) is connected to the transmission shaft (8) via a fluid delivery shaft (6). A rotatable slip ring (4) is provided on the outside of the fluid delivery shaft (6). An annular cavity is opened inside the slip ring (4). A coolant input pipeline (3) is provided on the outside of the slip ring (4) and communicates with the annular cavity inside the slip ring (4).

4. The automatically cooled boring tool assembly according to claim 3, characterized in that, The inside of the fluid delivery shaft (6) is provided with a coolant hole (10). The input of the external coolant pipeline (7) is connected to the coolant hole (10). The coolant enters the liquid chamber through the coolant hole (10) and the external coolant pipeline (7).

5. The automatically cooled boring tool assembly according to claim 3, characterized in that, Both the infusion shaft (6) and the knife bar (1) are equipped with labyrinth sealing rings (5). The labyrinth sealing rings (5) limit the slip ring (4). The slip ring (4) and the ring (5) are rotatably connected. The slip ring (4) and the infusion shaft (6) are connected by bearings.

6. The automatically cooled boring tool assembly according to claim 1, characterized in that, The output shaft of the electric push rod (11) is equipped with a mounting base (12) located inside the coolant chamber (9). A connecting shaft (13) is installed on the mounting base (12). There are two connecting shafts (13), which are symmetrically distributed. The sealing head (14) is located at the center.

7. The automatically cooled boring tool assembly according to claim 3, characterized in that, The knife bar (1) and the infusion shaft (6) are inserted into each other and fixed by bolts.

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