CN207807409U - A kind of carbon brush curved surface grinding numerically-controlled machine tool - Google Patents

Abstract

The utility model discloses a kind of carbon brush curved surfaces to grind numerically-controlled machine tool, including machine body, guide rail, spindle motor and pallet, spindle motor lower part is provided with cutter, it includes setting cutter body and cutter shaft, cutter body peripheral is circumferentially spaced to be disposed with multiple arcs knife, cutter groove is formed between each curved knife, the abradant surface of each curved knife is matched with the curve form of carbon brush to be ground；Carbon brush stationary fixture is provided on pallet, the fixture includes pedestal, the carbon brush mounting groove being arranged on pedestal and the cover board being arranged at the top of carbon brush mounting groove, carbon brush mounting groove be arranged in juxtaposition it is multiple, cover board for being fixedly clamped from top the carbon brush to be ground being placed in the carbon brush mounting groove, the spindle motor opposite rail movement simultaneously with movable arbor rotary course in attrition process to being placed in multiple carbon brush to be ground in the carbon brush mounting groove can be achieved.The carbon brush curved surface grinding numerically-controlled machine tool of the utility model may be implemented to carbon brush high-precision and efficient attrition process.

Description

A kind of carbon brush curved surface grinding numerically-controlled machine tool

Technical field

The utility model belongs to carbon brush grinding technology field, and in particular to a kind of carbon brush curved surface grinding numerically-controlled machine tool.

Background technology

Carbon brush (Carbon brush) be also brush, as a kind of slide contact member, is widely used many electrical In equipment.The application material of carbon brush mainly has graphite, soaks fat graphite, metal (cupric, silver) graphite.Carbon brush configuration is mainly used for Energy or signal are transmitted between motor or the fixed part and rotating part of generator or other rotating machineries, it is usually pure Carbon adds coagulator to be made, and external form is usually square, is stuck on metallic support, and there is spring handle in the inside, and it is pressed in shaft, motor When rotation, electric energy is conveyed to coil by phase changer, since its main component is carbon, referred to as carbon brush, it is easy to wear , therefore periodic maintenance is answered to replace, and clear up carbon distribution.

The hinge that carbon brush is transmitted as electric energy in motor unit, the quality of state directly affect the normal work of motor unit Make, and then affect the reliability level of entire electric system, once phenomena such as excessive wear, fracture occurs in carbon brush, needs immediately It replaces.For ensure unit restarting after can in the shortest time motor unit commutator face formed uniform alumina film into And reduce the inordinate wear of motor unit commutator face and the contact surface of carbon brush and motor unit commutator reaches most adequately Radian coincide so that the service life of single carbon brush extends, and quick, efficient and high-precision must be carried out to it before more renewing carbon brush Processing.

At present there are mainly two types of the processing technologys of carbon brush, one is underhand polish is carried out using abrasive machine, another kind is to adopt With computer-controlled digital-controlled carving machine.There are many defects during grinding for underhand polish：First, carbon brush working face radian Depending on the radius of grinding wheel, process of lapping medium plain emery wheel surface is easily adhered to carbon dust and is not easily cleaned, and the accumulation of carbon dust can make The grinding wheel for failing, and failing at grinding wheel can not ensure the precision and abradant surface smoothness of grinding, continue to the carbon brush meeting of being processed Its surface treatment is caused not reach requirement；Secondly, the carbon brush quantity of underhand polish single grinding is few, substantially can only once add One carbon brush of work, leading to grinding, time-consuming；Again, dynamics and the direction that can not ensure grinding in underhand polish, lead to processing Success rate is not high.

And it is exactly to rationally design milling cutter and carbon brush to use most important in the lapping mode of computer control digital-controlled carving machine The surface finish requirements of fixture, carbon brush are very high, wherein the material, precision of milling cutter and straight with the identical design of carbon brush contact surface The surface accuracy of carbon brush after influencing processing is connect, conventional milling cutter is due to machining path in being driven in numerical control and control accuracy It influences so that carbon brush surface grinding precision can be a greater impact, and whether carbon brush fixture is reliable to the fixation of carbon brush same Influence the machining accuracy of carbon brush, especially need to be clamped simultaneously multiple carbon brush to be ground carry out multiple carbon brush disposably process with The structure and its fixed form for promoting the occasion carbon brush fixture of grinding efficiency are affected to carbon brush surface accuracy, current numerical control Engraving machine cannot be satisfied the demand.The carbon brush of numerical controlled carving machining simultaneously needs to configure the peripheral equipments such as water route, pneumatic, in this way Whole device can be caused bulky, be unfavorable for portable use, and carbon brush easy tos produce carbon dust during processing, with carbon dust Accumulation easily cause the short-circuit initiation accident of motor incoming line circuit, furthermore need to connect in process and computer and program control System, operation are sufficiently complex.

Therefore, there is an urgent need for seek a kind of high grinding precision, efficient, small, safety, simple operation and the high carbon brush of success rate Grinding device.

Utility model content

For the disadvantages described above or Improvement requirement of the prior art, the utility model provides a kind of carbon brush curved surface grinding numerical control Lathe, designed by the cutter structure of optimization and coordinate processing driving path, in combination with polylith carbon brush clamping and can By the fixture of fixed function, may be implemented to carbon brush high-precision and efficient attrition process.

To achieve the above object, according to the one side of the utility model, a kind of carbon brush curved surface grinding numerical control machine is provided Bed, the carbon brush curved surface grinding numerically-controlled machine tool include the machine body with hollow shell, are arranged in the shell of machine body Guide rail, pedestal above portion be arranged on the guide rail and can opposite rail movement spindle motor and be set to lathe sheet The pallet for clamping carbon brush to be ground below the enclosure interior of body；

The spindle motor lower part is provided with the cutter for grinding carbon brush comprising the cutter sheet in handle of a knife one end is arranged Body and it is arranged in the handle of a knife other end and for the cutter shaft that is connect with spindle motor, the wherein cutter body peripheral is circumferentially spaced Multiple curved knifes for grinding are disposed with, cutter groove is formed between each curved knife, forms the endless knife group coaxial with cutter shaft with this, And the abradant surface of each curved knife in the endless knife group is matched with the curve form of carbon brush to be ground；

Carbon brush stationary fixture is provided on the pallet, which includes the base of bottom in the shell for be fixed on machine body Seat, the carbon brush mounting groove being arranged on pedestal and the cover board being arranged at the top of carbon brush mounting groove, the carbon brush mounting groove are simultaneously Row arrange multiple that, for the multiple carbon brush to be ground of installation to be clamped simultaneously, the cover board is placed in for being fixedly clamped from top Carbon brush to be ground in the carbon brush mounting groove, the spindle motor opposite rail movement simultaneously with movable arbor rotary course In attrition process to being placed in multiple carbon brush to be ground in the carbon brush mounting groove can be achieved.

Each curved knife as a further improvement of the utility model, in the endless knife group is consistent with commutator radian, The grinding cambered surface of the carbon brush is matched with commutator cambered surface.

Each curved knife quantity in the endless knife group is two or more as a further improvement of the utility model, Along the upward uniform intervals arrangement of cutter peripheral ring.

Each curved knife as a further improvement of the utility model, in the endless knife group is of same size on circumferential direction Or it is different.

The both ends of the cover board are equipped with axis hole as a further improvement of the utility model, and the pedestal corresponds to axis hole Position is equipped with axis pin, and the axis pin matches with axis hole, realizes the active link of the cover board and pedestal, and the two of the cover board End is respectively equipped with adjusting knob, and the position that the pedestal corresponds to the adjusting knob is equipped with threaded hole, and the one of the adjusting knob End is equipped with screw rod, and the other end is equipped with knob handle, and the screw rod can be screwed into the threaded hole by handle rotation, realized The cover board is fixedly connected with pedestal.

The shell internal upper part of machine body is additionally provided with telescopic shaft as a further improvement of the utility model, with institute The pedestal be connected by power of spindle motor is stated, telescopic shaft can drive the spindle motor to be moved along guide rail described in power drive.

The shell side of the machine body is provided with control cabinet, the use as a further improvement of the utility model, It is disposed therein in the actuating unit of driving telescopic shaft and the control unit for controlling the spindle motor rotation.

The shell of the machine body is closure as a further improvement of the utility model, and its side is arranged There is suction inlet, grinding the carbon dust of generation can be focused on by the suction inlet.

In general, have the above technical solutions conceived by the present invention are compared with the prior art, with following Beneficial effect：

(1) in the carbon brush curved surface grinding numerically-controlled machine tool of the utility model, using multi-disc cambered surface knife as milling cutter, jointly It is arranged in one end of connecting rod, cambered surface is consistent with commutator radian, can ensure that carbon brush grinding cambered surface and commutator arc in this way Face can fully coincide, and be rotated together with connecting rod by the multifreedom motions such as the translation and rotation of cutter and multi-disc cutter, real In a present circular motion, repeatedly carbon brush is ground, to rapid shaping.

(2) in the carbon brush curved surface grinding numerically-controlled machine tool of the utility model, the bottom of fixture is equipped with multiple carbon brush mounting grooves, and Its top is set to cover board, and cover board realizes by axis pin and pedestal be hinged that on one side another side is screwed by adjusting knob realization Connection, not only may be implemented once to clamp polylith brush to be ground, but also by the compression of cover board, carbon brush clamping is reliable and stable, The grinding precision of carbon brush is effectively ensured.

(3) the carbon brush curved surface of the utility model grinds numerically-controlled machine tool, the time required to capable of greatly shortening single carbon brush grinding, carries Height grinding success rate and grinding precision, and then improve main transformer maintaining efficiency, ensure full ship electric system it is safe, continuous, Reliably.

(4) in the carbon brush curved surface grinding numerically-controlled machine tool of the utility model, main converter set carbon brush grinding device is free with three The automatic numerical control engraving machine of degree is parent form, using one-touch start stop operation, can be automatically performed carbon brush grinding, is not necessarily in process It manually controls, single operation can grind more carbon brush.

(5) in the carbon brush curved surface grinding numerically-controlled machine tool of the utility model, lathe is closed in integrated lathe shell, is added Work environment does not influence external environment, has many advantages, such as that small, milling time is short, precision is high, safe.

Description of the drawings

Fig. 1 is the three dimensional structure diagram that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool；

Fig. 2 is the carbon brush curved surface grinding numerically-controlled machine tool master that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool View；

Fig. 3 is the A-A sectional views of Fig. 2；

Fig. 4 (a) is a kind of front view of the milling cutter of carbon brush curved surface grinding numerically-controlled machine tool in the utility model embodiment；

Fig. 4 (b) is a kind of three-dimensional knot of the milling cutter of carbon brush curved surface grinding numerically-controlled machine tool in the utility model embodiment Structure schematic diagram；

Fig. 5 grinds milling cutter and the carbon brush grinding of numerically-controlled machine tool for a kind of carbon brush curved surface in the utility model embodiment Schematic diagram；

Fig. 6 (a) is the main view for the carbon brush stationary fixture that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool Figure；

Fig. 6 (b) is the three-dimensional for the carbon brush stationary fixture that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool Structural schematic diagram；

Fig. 7 is that a kind of main circuit hardware system of carbon brush curved surface grinding control box of numerical control machine tool of the utility model embodiment shows It is intended to；

In all the appended drawings, same reference numeral indicates identical technical characteristic, specially：1- carbon brush stationary fixture, 2- milling cutters, 3- spindle motors, 4- telescopic shafts, 5- stepper motors, 6- guide rails, 7- installation pedestals, 8- carbon brush, 9- grindings are bent Face, 101- pedestals, 102- cover boards, 103- adjusting knobs, 104- carbon brush mounting groove, 201- clampers, 202- cutter grooves, 203- knives Axis, 204- handle of a knifes.

Specific implementation mode

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain The utility model is not used to limit the utility model.

As long as in addition, technical characteristic involved in the various embodiments of the present invention described below each other it Between do not constitute conflict and can be combined with each other.

Fig. 1 is that the carbon brush curved surface of the preferred embodiment of the utility model grinds the three dimensional structure diagram of numerically-controlled machine tool.Such as Shown in Fig. 1, it includes machine body, carbon brush stationary fixture 1 and pallet, milling cutter 2, main shaft which, which grinds numerically-controlled machine tool, Motor 3, control cabinet, wherein control cabinet are located at the side of lapping machine body housing, and carbon brush stationary fixture 1 and pallet are set to shell Bottom in shell, the carbon brush stationary fixture 1 are equipped with multiple carbon brush mounting grooves and are convenient for while placing multiple carbon brush to be ground, main shaft Motor 3 is set to the top of carbon brush stationary fixture 1, and milling cutter 2 is set to the bottom end of the spindle motor 3, it is ensured that it is just in carbon brush Curved face contact, control cabinet controls spindle motor 3 and milling cutter 2 is driven to rotate, to be ground to carbon brush.

Fig. 2 is the carbon brush curved surface grinding numerically-controlled machine tool master that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool View, Fig. 3 are the A-A sectional views of Fig. 2.As shown in Fig. 2, carbon brush curved surface grinding numerically-controlled machine tool further includes telescopic shaft 4 and guide rail 6, wherein telescopic shaft 4 is set to the case top of machine body, is moved along it convenient for spindle motor 3.The both sides interval of telescopic shaft 4 Certain distance is respectively equipped with guide rail 6.As shown in figure 3, being arranged with installation pedestal 7 on guide rail 6, the installation pedestal 7 is solid with telescopic shaft 4 Fixed connection, can move under the action of telescopic shaft 4 along guide rail 6, and one end of telescopic shaft 4 is equipped with stepper motor 5, stepper motor 5 It drives telescopic shaft 4 flexible, drive installation pedestal 7 and then spindle motor is driven to be moved along guide rail 6, realize the grinding to multiple carbon brush Processing.The time required to the structure can greatly shorten single carbon brush grinding, grinding success rate and grinding precision are improved, and then improve master Become maintaining efficiency, ensures the safe, continuous, reliable of electric system.Guide rail 6 can be set up in parallel it is two or more, Concrete structure the utility model does not limit, and the structure installed and relatively moved convenient for pedestal 7 is applicable.

Fig. 4 (a) is the front view for the milling cutter that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool, figure 4 (b) is the three dimensional structure diagram for the milling cutter that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool.Such as figure Shown in 4 (a) and 4 (b), milling cutter 2 includes clamper 201, cutter body, cutter shaft 203 and handle of a knife 204.Wherein, clamper 201 one end and the input axis connection of spindle motor 3, the other end clamp cutter shaft 203, and the handle of a knife is arranged in 203 end of cutter shaft 204, cutter body is located at 204 other end of handle of a knife.The circumferential lateral surface of cutter body is equipped with multiple arcs knife, between each curved knife Cutter groove 202 is formed, forms the endless knife group coaxial with cutter shaft, the curved of the abradant surface of each curved knife and carbon brush to be ground with this Shape matches, for being ground to carbon brush.

In the embodiments of the present invention, the quantity of curved knife is 4, is circumferentially arranged symmetrically preferably along central shaft, phase Ying Di forms cutter groove 202 between each curved knife.The arc shape of the curved blade of curved knife is according to the curve form of required carbon brush Depending on, multi-disc curved knife is rotated together with connecting rod, is realized in a circular motion, is repeatedly ground to carbon brush, to Rapid shaping.The particular number of curved knife is not construed as limiting in the utility model, can be configured according to specific requirements.

Fig. 5 is that a kind of milling cutter of carbon brush curved surface grinding numerically-controlled machine tool of the utility model embodiment shows with what carbon brush was ground It is intended to.As shown in figure 5, using cambered surface knife as milling cutter 2, cambered surface is consistent with commutator cambered surface, can ensure that carbon brush 8 in this way Grinding cambered surface 9 can fully coincide with commutator cambered surface, pass through the multifreedom motions such as the translation and rotation of cutter 2, realize will The initial carbon brush 8 is ground into the carbon brush finished product with required curved surface.In the utility model preferred embodiment, carbon brush grinding device , using one-touch start stop operation, it can be automatically performed carbon brush grinding using the automatic numerical control engraving machine of Three Degree Of Freedom as parent form, add Without manually controlling during work, single operation can grind more (such as 4) carbon brush.

Fig. 6 (a) is the main view for the carbon brush stationary fixture that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool Figure, Fig. 6 (b) are that the three-dimensional structure for the carbon brush stationary fixture that a kind of carbon brush curved surface of the utility model embodiment grinds numerically-controlled machine tool is shown It is intended to.As shown in Fig. 6 (a) and Fig. 6 (b), which includes pedestal 101, cover board 102, adjusting knob 103 and carbon Brush mounting groove 104.Wherein, pedestal 101 is step-like structure, and one side is equipped with multiple carbon brush mounting grooves 104, waits grinding for placing The carbon brush of mill.The top of carbon brush mounting groove 104 is equipped with cover board 102, and the both ends of cover board 102 are equipped with axis hole, and pedestal 101 corresponds to the axis The position in hole is equipped with axis pin, and axis pin is matched with axis hole, realizes the active link of cover board 102 and pedestal 101, is beaten convenient for cover board 102 It opens to take out carbon brush 8 or close and compresses carbon brush 8.As shown in Fig. 6 (b), it is respectively equipped with adjusting knob 103 at the both ends of cover board 102, The position that pedestal 101 corresponds to the adjusting knob 103 is equipped with threaded hole, and one end of adjusting knob 103 is equipped with screw rod, and the other end is equipped with Screw rod is threaded into hole by knob handle convenient for holding and rotating, and realization cover board 102 is fixedly connected with pedestal 101.The folder The bottom of tool is equipped with multiple carbon brush mounting grooves 104, and its top is equipped with cover board 102, and cover board 102 passes through axis pin and pedestal on one side 101 realizations are hinged, and another side realizes that the connection that is screwed, the structure not only may be implemented once to clamp by adjusting knob 103 Polylith brush to be ground, and by the compression of cover board 102, carbon brush clamping is reliable and stable, and the grinding of carbon brush can be effectively ensured Precision.

Fig. 7 is the main circuit system signal that a kind of carbon brush curved surface of the utility model embodiment grinds control box of numerical control machine tool Figure.As shown in fig. 7, main circuit system is mainly by PLC controller, sensor, stepper motor driver, frequency converter, accessory power supply Composition.Wherein, PLC controller is the core component of control system, receiving sensor signal and feed back corresponding pulse signal to Step actuator, for controlling spindle motor frequency converter start and stop, sensor is then used for pulse zero testing and limit on the right-right-hand limit position is detected It protects and signal is fed back into PLC controller, and walk machine driver and receive the P-pulse tally control step from PLC controller Stepper motor operates, the accurate position movement for realizing spindle motor, to realize that milling cutter moves left and right, while spindle inverters Receive the control spindle motor operating of PLC start stop signals, realizes main axle cutter high speed rotation, and accessory power supply is by alternating current input power supplying It providing, exchange 380V input powers are sent into power module after transformer pressure-reducing to alternating current 220V, are converted to 24V DC power supplies, It powers to stepper motor driver, touch screen.The software systems of control cabinet are then true according to system mathematic model, theory analysis is established Determine control strategy, making software, software test and etc. the optimal software of final curing, software use modular design method, just In test and software upgrading, it is ensured that the reliability service of system reaches one-touch start and stop effect.In a preferred embodiment, Above-mentioned main circuit system can be placed in a control cabinet, and control cabinet is preferably set to the outside side of machine body, And can be with shell one, this arrangement is not only compact-sized, easy to remove, and can form enclosed construction with integration, is convenient for Overall-in-one control schema.

A preferred embodiment of numerically-controlled machine tool is ground as a kind of carbon brush curved surface of the utility model embodiment, the carbon brush is bent The shell that numerically-controlled machine tool ontology is ground in face is enclosed construction, and side is equipped with suction inlet, external common suction can be used in process Dirt device realizes dustless processing, while machine tool enclosure is equipped with glass window in carbon brush means of abrasion, can be used for observing the processing of carbon brush Process.

As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change Into etc., it should be included within the scope of protection of this utility model.

Claims (8)

1. a kind of carbon brush curved surface grinds numerically-controlled machine tool, includes machine body with hollow shell, the shell in machine body is set Guide rail, the pedestal of body inner upper be arranged on the guide rail and can opposite rail movement spindle motor and be set to machine The pallet for clamping carbon brush to be ground below the enclosure interior of bed ontology, which is characterized in that

The spindle motor lower part is provided with the cutter for grinding carbon brush comprising be arranged the cutter body in handle of a knife one end with And it is arranged in the handle of a knife other end and for the cutter shaft that is connect with spindle motor, the wherein circumferentially spaced arrangement of the cutter body peripheral There are multiple curved knifes for grinding, forms cutter groove between each curved knife, form the endless knife group coaxial with cutter shaft, and institute with this The abradant surface for stating each curved knife in endless knife group is matched with the curve form of carbon brush to be ground；And

Be provided with carbon brush stationary fixture on the pallet, the fixture include the pedestal of bottom in the shell for be fixed on machine body, The carbon brush mounting groove being arranged on pedestal and the cover board being arranged at the top of carbon brush mounting groove, the carbon brush mounting groove are cloth arranged side by side That sets is multiple, for being clamped the multiple carbon brush to be ground of installation simultaneously, the cover board for be fixedly clamped from top be placed in it is described Carbon brush to be ground in carbon brush mounting groove, the spindle motor opposite rail movement simultaneously with movable arbor rotary course in can Realize the attrition process to being placed in multiple carbon brush to be ground in the carbon brush mounting groove.

2. carbon brush curved surface according to claim 1 grinds numerically-controlled machine tool, wherein each curved knife in the endless knife group with Commutator radian is consistent so that the grinding cambered surface of the carbon brush can be matched with commutator cambered surface.

3. carbon brush curved surface according to claim 1 grinds numerically-controlled machine tool, wherein each curved knife number in the endless knife group Amount is two or more, along the upward uniform intervals arrangement of cutter peripheral ring.

4. carbon brush curved surface according to any one of claim 1-3 grinds numerically-controlled machine tool, wherein in the endless knife group Each curved knife is of same size or different on circumferential direction.

5. carbon brush curved surface according to any one of claim 1-3 grinds numerically-controlled machine tool, wherein the both ends of the cover board are set There are axis hole, the position that the pedestal corresponds to axis hole to be equipped with axis pin, the axis pin matches with axis hole, realizes the cover board and pedestal Active link, and the both ends of the cover board are respectively equipped with adjusting knob, and the position that the pedestal corresponds to the adjusting knob is set There is a threaded hole, one end of the adjusting knob is equipped with screw rod, and the other end is equipped with knob handle, can will be described by handle rotation Screw rod is screwed into the threaded hole, realizes being fixedly connected for the cover board and pedestal.

6. carbon brush curved surface according to any one of claim 1-3 grinds numerically-controlled machine tool, wherein outside the machine body Shell internal upper part is additionally provided with telescopic shaft, the pedestal be connected by power with the spindle motor, and telescopic shaft can band described in power drive The spindle motor is moved to move along the guide rail.

7. carbon brush curved surface according to claim 6 grinds numerically-controlled machine tool, wherein the shell side of the machine body is arranged There are control cabinet, the actuating unit for driving telescopic shaft and the control unit setting for controlling the spindle motor rotation In wherein.

8. carbon brush curved surface according to any one of claim 1-3 grinds numerically-controlled machine tool, wherein outside the machine body Shell is closure, and its side is provided with suction inlet, grinds the carbon dust of generation and can be focused on by the suction inlet.