CN110039135B

CN110039135B - Improved device based on cooling type electrochemical machining power supply leading-in device

Info

Publication number: CN110039135B
Application number: CN201910187785.0A
Authority: CN
Inventors: 庞桂兵; 辛开开; 袁长峰
Original assignee: Dalian Huizhi Gongda Special Precision Machinery Co ltd
Current assignee: Dalian Huizhi Gongda Special Precision Machinery Co ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2020-06-05
Anticipated expiration: 2039-03-13
Also published as: CN110039135A

Abstract

The invention discloses an improved device based on a cooling type electrochemical machining power supply lead-in device, which comprises a rotating plate fixed on a main shaft and a fixing plate fixed on a main shaft box; a plurality of clamping grooves are formed in the fixed plate, one ends of the carbon brushes are connected with the bottoms of the clamping grooves through springs, and the other ends of the carbon brushes are pressed by the rotating plate in a contact mode so as to be fixed in the clamping grooves; a cooling water collecting tank is arranged below the rotating plate, a cooling water outlet is formed in the bottom of the cooling water collecting tank and is communicated with a water inlet of the cooling water collecting tank, a water outlet of the cooling water collecting tank is communicated with a water inlet of a cooling pump, a water outlet of the cooling pump is communicated with a spray head, and the spray head faces the rotating plate; the cooling pump is still connected in control system, and control system connects in temperature sensor, and temperature sensor installs in the rotor plate. The device can not only transmit current to a workpiece, but also keep the temperature of the conductive device within an acceptable range.

Description

Improved device based on cooling type electrochemical machining power supply leading-in device

Technical Field

The invention relates to a spindle power supply leading-in device of an electrochemical machining machine tool and a cooling device thereof, in particular to an electrochemical machining power supply leading-in device which adopts a fixed plate to conduct electricity and has air cooling and water cooling combined cooling functions.

Background

The electrical connection between the processing power supply and the machine tool has been a difficult problem in electrochemical machining processes. The difficulty is that the electric conductivity between the brush and the main shaft of the machine tool is required to be ensured under the condition of relative motion, and particularly, the electric conductivity can be kept under the condition of high-speed relative motion of the main shaft and the brush. At present, the friction and the electric conduction of a carbon brush and a friction ring of a brush motor are generally adopted in the electrochemical machining process for solving the problem, and the air cooling structure is realized by means of self rotation. This structure has no problem in low current machining, but sometimes the electrochemical machining requires a large current, which is very liable to cause heat generation and high temperature, thereby causing damage to machine tool equipment or causing a potential risk to an operator. Therefore, it is necessary to design a device that reliably delivers current while maintaining the temperature of the conductive device within an acceptable range.

Disclosure of Invention

The invention aims to provide an improved device based on a cooling type electrochemical machining power supply lead-in device, which can reliably transfer current and keep the temperature of a conductive device within an acceptable range.

In order to achieve the purpose, the invention adopts the following technical scheme: an improved device based on a cooling type electrochemical machining power supply leading-in device comprises a rotating plate fixed on a main shaft, and a fixing plate fixed on a main shaft box and arranged in parallel with the rotating plate; a plurality of clamping grooves are formed in the fixed plate, one ends of the carbon brushes are connected with the bottoms of the clamping grooves through springs, and the other ends of the carbon brushes are pressed by the rotating plate in a contact mode so as to be fixed in the clamping grooves; the rotating plate and the fixed plate can be both conductive;

a cooling water collecting tank with an opening at the top is arranged below the rotating plate, a cooling water outlet is formed in the bottom of the cooling water collecting tank and is communicated with a water inlet of the cooling water collecting tank, a water outlet of the cooling water collecting tank is communicated with a water inlet of a cooling pump, a water outlet of the cooling pump is communicated with a spray head, and a spray nozzle of the spray head faces the rotating plate; the cooling pump is also connected to a control system, the control system is connected to a temperature sensor, and the temperature sensor is arranged on the rotating plate;

at least one fan facing the rotating plate is arranged around the rotating plate; the power supply is connected with the fixing plate through an external power supply lead-in port on the fixing plate;

a diversion trench with a blowing function is formed in one surface, far away from the carbon brush, of the rotating plate.

As an improvement, an air duct is also arranged between the fan and the rotating plate.

As an improvement, the rotating plate is provided with heat dissipation holes.

The carbon brush fixing device has the advantages that the fixing plate is perpendicular to the main shaft, the size of the fixing plate is not limited by the diameter of the main shaft, more carbon brushes can be installed, the contact area of the carbon brushes and the rotating plate is increased, the current transmission capacity is increased, the fixing plate is fixedly connected with a machine tool, and the shape and the size of the fixing plate are not limited by the main shaft structure. The carbon brush is arranged on the fixed plate and rubs with the rotating plate, and heat is mainly generated in the rotating plate, so that a guide groove and a heat dissipation hole are formed in the rotating plate, a heat conduction way of the rotating plate can be increased, and heat can be dissipated in time, and the carbon brush is more beneficial to heat discharge compared with the carbon brush arranged on the rotating plate; the cooling mode combining air cooling and water cooling is adopted, air cooling is adopted under the conventional condition, when the temperature detected by the temperature sensor reaches the temperature limited by the processing requirement, the air cooling is not enough to cool the temperature of the main shaft, and the water cooling mode is started to cool the main shaft. The medium current and the small current are processed by adopting an air cooling mode, the operation is simple and easy, the electricity is saved, and the water cooling mode is adopted under the large current processing condition so as to achieve the sufficient cooling effect.

Drawings

FIG. 1 is a basic configuration of the apparatus;

fig. 2 is a view of the fixed plate of fig. 1 through the rotating plate, as viewed from direction C of fig. 1;

fig. 3 is a view of the rotating plate (the guide groove having the blade shape) and the fan as viewed from the direction C in fig. 1 in the case where the present apparatus includes a plurality of fans;

fig. 4 shows a channel having an approximately rectangular shape.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the apparatus includes a rotating plate 3 fixed to a spindle 5, and a fixed plate 1 fixed to a spindle head and disposed parallel to the rotating plate 3; the rotating plate 3 rotates along with the main shaft 5, and the fixed plate 1 does not rotate. As shown in fig. 2, 4 clamping grooves 17 are formed in the fixing plate 1, each clamping groove 17 is provided with 2 carbon brushes 2, one end of each carbon brush 2 is connected with the bottom of the clamping groove 17 through a spring 12, and the other end of each carbon brush 2 is pressed by the rotating plate 3 so as to be fixed in the clamping groove 17; the power supply is connected with the fixing plate 1 through an external power supply lead-in port 16 on the fixing plate 1, and both the fixing plate 1 and the rotating plate 3 are selected to be conductive materials due to the requirement of power supply. Of course, the number of the slots 17, the number of the carbon brushes 2, and the like may be other schemes.

When the rotating plate 3 rotates, a large amount of heat is generated by friction with the carbon brush 2, and thus a heat dissipation process will be described later. Still as shown in fig. 1, a cooling water collecting tank 14 with an opening at the top is arranged below the rotating plate 3, a cooling water outlet 7 is arranged at the bottom of the cooling water collecting tank 14, the cooling water outlet 7 is communicated with a water inlet of a cooling water collecting tank 11, a water outlet of the cooling water collecting tank 11 is communicated with a water inlet of a cooling pump 10, a water outlet of the cooling pump 10 is communicated with a spray head 15, and a spray nozzle of the spray head 15 faces the rotating plate 3; the cooling pump 10 is also connected to a control system 9, the control system 9 is connected to a temperature sensor 8, and the temperature sensor 8 is arranged on the rotating plate 3;

a fan 4 facing the rotating plate 3 is also arranged above the rotating plate 3; the fan 4 may be plural as shown in fig. 3. The two fans arranged oppositely can be arranged to output air and input air in general, when the fan 4 inputs air, the air guide tube 13 can be added to prevent the fan 4 from approaching the main shaft too much because the fan 4 is close to the main shaft 5 too much to suck the electrolyte into the fan 4.

As shown in fig. 3, the guide groove 31 having a blade-like blowing function is formed on the surface of the rotating plate 3 away from the spring 12, and the guide groove 31 is formed so as not to penetrate through the surface of the rotating plate 3 to which the carbon brush 2 is attached. After the rotating plate 3 rotates, the guiding groove 31 generates wind, so that heat generated by the rotating plate 3 is taken away as much as possible by the wind. Channels 31 may also be in a pattern that approximates a rectangle, as shown in fig. 4.

Naturally, the rotating plate 3 may be provided with heat radiation holes for further heat radiation.

In the use process: current flows into the fixed plate 1 through the external power supply lead-in port 16, the fixed plate 1 guides the current into the electric brush 2, the electric brush 2 is contacted with the rotating plate 3, the current is transmitted into the rotating plate 3, the rotating plate 3 is fixed on the main shaft 5, the current is transmitted to the main shaft 5, the main shaft 5 is connected with a workpiece in the electrochemical machining process, and the current is transmitted to the workpiece. The rotating plate 3 generates heat due to friction between the rotating plate 3 and the carbon brush 2 during the electrochemical machining process; the current flows through the fixed plate 1, the rotating plate 3 and the main shaft 5, a large amount of heat is generated due to the resistance of the material, and the fan 4 is normally used for exhausting air through the air guide cylinder 13 and the flow of the surrounding air caused by the rotation of the flow guide groove of the rotating plate 3 so as to achieve the purpose of heat dissipation. When the temperature sensor 8 detects that the temperature of the rotating plate 3 is higher than the warning temperature, the controller 9 controls the cooling pump 10 to work, cooling water is sprayed to the rotating plate 3 through the spray head 15, and since the rotating speed of the spindle does not exceed 10 revolutions per minute in the electrochemical machining process, the cooling water can not splash, and then drips to the cooling water collecting tank 14 and returns to the cooling water collecting tank 11 through the cooling water outlet 7, so that cooling water circulation is realized, and the rotating plate 3 is cooled. During the cooling process, the temperature sensor 8 detects the temperature of the rotating plate 3 in real time and controls the on/off of the pump 10.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. An improved device based on a cooling type electrochemical machining power supply leading-in device is characterized by comprising a rotating plate (3) fixed on a main shaft (5), and a fixing plate (1) fixed on a main shaft box and arranged in parallel with the rotating plate (3); a plurality of clamping grooves (17) are formed in the fixing plate (1), one ends of the carbon brushes (2) are connected with the bottoms of the clamping grooves (17) through springs (12), and the other ends of the carbon brushes are pressed by the rotating plate (3) in a contact mode so as to be fixed in the clamping grooves (17); the rotating plate (3) and the fixing plate (1) can both be conductive;

a cooling water collecting tank (14) with an opening at the top is arranged below the rotating plate (3), a cooling water outlet (7) is formed in the bottom of the cooling water collecting tank (14), the cooling water outlet (7) is communicated with a water inlet of a cooling water collecting tank (11), a water outlet of the cooling water collecting tank (11) is communicated with a water inlet of a cooling pump (10), a water outlet of the cooling pump (10) is communicated with a spray head (15), and a spray nozzle of the spray head (15) faces the rotating plate (3); the cooling pump (10) is also connected to a control system (9), the control system (9) is connected to a temperature sensor (8), and the temperature sensor (8) is mounted on the rotating plate (3);

at least one fan (4) facing the rotating plate (3) is mounted around the rotating plate (3); the power supply is connected with the fixing plate (1) through an external power supply lead-in port (16) on the fixing plate (1);

and a diversion trench (31) with a blowing function is formed in one surface of the rotating plate (3) far away from the carbon brush (2).

2. The improved device based on the cooled electrochemical machining power lead-in device of claim 1, characterized in that an air duct (13) is further arranged between the fan (4) and the rotating plate (3).

3. The improved device for introducing power for cooled electrochemical machining according to claim 1, wherein heat dissipation holes are formed on the rotating plate (3).