A milling machine for a commutator

Abstract

The present invention relates to the technical field of milling groove machines, and aims to provide a milling groove machine for a commutator, which includes a feeding mechanism, a milling groove mechanism, a discharging mechanism, and a material transferring mechanism; the feeding mechanism includes a blanking device and a material placing table; a circular material placing groove is provided at the top of the material placing table, and an annular positioning sleeve is arranged in the material placing groove, and a plurality of positioning blocks are arranged at the upper end of the positioning sleeve; the milling groove mechanism includes a material positioning device and a milling groove device; the material positioning device includes a fixed table, and a plurality of positioning grooves are formed in the side wall of the fixed table. When the commutator body to be processed is placed in the material placing groove under the action of the blanking device, the positioning blocks are inserted into the corresponding wire welding seams at the lower end of the commutator body to achieve preliminary positioning. Then, the material transferring mechanism is used to transfer the commutator body to the fixed table, and the positioning grooves are used to cooperate with the convex feet at the lower end of the commutator body to further achieve positioning, so that the milling groove device can accurately mill the required insulating grooves on the commutator body.

Description

Technical Field

[0001] The present invention relates to the technical field of grooving machines, and particularly relates to a grooving machine for a commutator. Background Art

[0002] During the processing of a grooved commutator, it is necessary to mill grooves in both bakelite powder and copper sheets together. A large number of vertical insulating grooves need to be milled on the surface of one commutator. For some relatively small commutators, it is very difficult to accurately find the position for accurate processing during grooving. The existing processing method is to lock the commutator on the mandrel with screws for grooving, and the screws must be disassembled and assembled once for each groove processed, which is time-consuming and laborious.

[0003] Currently, a Chinese patent document with the authorization announcement number CN204221069U in the prior art discloses a micro vertical grooving machine, which includes a machine frame table. A milling mechanism is installed on the left part of the table surface of the machine frame table, and a mechanical arm loading and unloading mechanism is vertically installed on the right part of the table surface of the machine frame table. A dividing head assembly mechanism is vertically installed in the front between the milling mechanism and the mechanical arm loading and unloading mechanism. The mechanical arm loading and unloading mechanism can install an un-grooved commutator on the dividing head assembly mechanism, or remove the grooved commutator from the dividing head assembly mechanism. A vibrating feeding tray is installed on the rear side of the milling mechanism, and the lower end of the feeding slide rail of the vibrating feeding tray is fixed on the side of the mechanical arm loading and unloading mechanism. Through the vibrating feeding tray, the un-grooved commutator falls onto the mechanical arm loading and unloading mechanism; a blanking pipe is installed at a position close to the dividing head assembly mechanism between the milling mechanism and the mechanical arm loading and unloading mechanism.

[0004] As Figure 1 shown, a conventional commutator includes a commutator body. A plurality of welding grooves are uniformly arranged along the circumferential direction at the bottom of the commutator body, so that a convex foot is formed between two adjacent welding grooves. A plurality of insulating grooves alternating with the welding grooves are uniformly arranged along the circumferential direction on the surface of the commutator body, and the insulating grooves penetrate through the upper and lower ends along the axis direction; for the convenience of processing, the processing step of the welding groove is before the insulating groove, that is, it is necessary to process the insulating groove on the commutator body on which the welding groove has been processed.

[0005] If the above vertical grooving machine is used to mill the insulating groove, neither the vibrating feeding tray nor the mechanical arm loading and unloading mechanism can accurately position the position of the welding groove, and thus the insulating groove cannot be accurately milled at the corresponding position, which needs to be improved. Summary of the Invention

[0006] The purpose of the present invention is to provide a grooving machine for a commutator, which has the effect of accurately positioning the commutator to be processed.

[0007] The above technical purpose of the present invention is achieved through the following technical solutions:

[0008] A milling slot machine for a commutator, comprising a frame, a feeding mechanism, a milling slot mechanism and a discharging mechanism arranged on the frame, and a material transferring mechanism for sequentially conveying a workpiece from the feeding mechanism to the milling slot mechanism and the discharging mechanism; the feeding mechanism includes a feeding cylinder, a blanking device and a material placing table; a circular material placing groove is arranged at the top of the material placing table, an annular positioning sleeve is arranged along the axis in the material placing groove, and a plurality of upwardly protruding positioning blocks are arranged at the upper end of the positioning sleeve, and the positioning blocks are correspondingly arranged with the welding grooves at the lower end of the commutator body; the milling slot mechanism includes a material positioning device, a indexing rotation device and a milling slot device; the material positioning device includes a cylindrical fixing table, and a guiding column matching with the central hole of the commutator body is arranged along the axis at the top of the fixing table; a plurality of positioning grooves matching with the lower convex feet of the commutator body are uniformly arranged along the circumferential direction on the side wall of the fixing table.

[0009] By adopting the above technical scheme, when the commutator body to be processed is placed in the material placing groove under the action of the blanking device, the positioning block is inserted into the corresponding welding seam at the lower end of the commutator body to realize preliminary positioning, and then the commutator body is transferred to the fixing table by the material transferring mechanism, and further positioning is realized by the cooperation of the positioning groove and the lower convex feet of the commutator body, so that the milling slot device can accurately mill the required insulating slots at the correct positions on the commutator body.

[0010] The present invention is further arranged as: the top end of the positioning block forms a pointed top by chamfering both sides.

[0011] By adopting the above technical scheme, the pointed top-shaped positioning block has a certain guiding effect, which is convenient for the positioning block to be aligned and inserted into the welding seam at the lower end of the commutator body.

[0012] The present invention is further arranged as: the outer wall of the positioning sleeve is in clearance fit with the inner wall of the material placing groove; a fastening hole penetrating through to the inside of the material placing groove is arranged on the outer wall of the material placing table, and the fastening hole is aligned with the positioning sleeve located in the material placing groove; a fastening bolt is threadedly connected in the fastening hole.

[0013] By adopting the above technical scheme, by tightening the fastening bolt, the end part passing through the fastening hole abuts against the surface of the positioning sleeve for fixation, so as to realize the detachable installation of the positioning sleeve, so as to replace the positioning sleeve with different positioning blocks according to different commutators.

[0014] The present invention is further arranged as: positioning holes penetrating through both sides of the material placing groove are radially arranged on the material placing table, and any positioning block at the upper end of the positioning sleeve located in the material placing groove can cover the positioning holes.

[0015] By adopting the above technical solution, the installation angle of the positioning sleeve in the material placing groove can be determined through the positional relationship between the positioning hole and the positioning block, so that the positioning block corresponds to the positioning groove on the fixing table, facilitating the positioning after the transfer of the commutator body.

[0016] The present invention is further configured as follows: a downward pressing lifting cylinder is arranged above the fixing table on the frame, the piston rod of the downward pressing lifting cylinder is arranged vertically downward, and a downward pressing cylinder is arranged along the axis of the fixing table at the end of the piston rod; a guiding hole matching with the guiding column is opened along the axis at the bottom of the downward pressing cylinder; the difference between the outer diameter of the downward pressing cylinder and that of the commutator body is less than the depth of the insulating groove to be opened on the surface of the commutator body.

[0017] By adopting the above technical solution, in order to improve the positioning accuracy, the dimensional fit between the positioning groove and the convex foot needs to be extremely tight, which may cause the convex foot to not be able to fully insert into the corresponding positioning groove when the commutator body is placed on the fixing table. Therefore, the downward pressing lifting cylinder is used to drive the downward pressing cylinder to press and fix the commutator body downward, enhancing the stability of the commutator body and ensuring the processing accuracy at the same time.

[0018] The present invention is further configured as follows: the milling groove mechanism further includes a material ejecting device; the material ejecting device includes an ejecting sleeve slidably connected to the outside of the fixing table along the axis, and an ejecting block matching with the positioning groove is arranged on the inner wall of the ejecting sleeve.

[0019] By adopting the above technical solution, when the ejecting sleeve moves upward, the ejecting block is used to top against the bottom of the convex foot, thereby jacking up and loosening the commutator body, avoiding the situation that the commutator body cannot be removed from the fixing table due to the tight fit between the convex foot and the positioning groove.

[0020] The present invention is further configured as follows: the material ejecting device further includes an ejecting lifting cylinder arranged vertically on the frame and an ejecting plate arranged on the piston rod of the ejecting lifting cylinder; the ejecting plate is in a horizontally arranged U shape, and the ejecting sleeve is located inside the U-shaped opening of the ejecting plate; limiting grooves are respectively and oppositely opened on the inner walls of both sides of the U-shaped opening, and an annular operating edge is arranged on the outer wall of the ejecting sleeve, and the operating edge cooperates with the limiting grooves on both sides at the same time.

[0021] By adopting the above technical solution, when the commutator body needs to be ejected after processing, the ejecting lifting cylinder extends the piston rod to push the ejecting plate upward, and both sides of the operating edge are located in the limiting grooves, so that the ejecting sleeve will move upward under the drive of the ejecting plate to realize the ejecting operation.

[0022] The present invention is further configured as follows: The blanking device includes a blanking seat disposed on the frame. A blanking channel is vertically penetrated through the blanking seat. An operation notch penetrating the blanking seat outward is vertically disposed on one side of the blanking channel. The blanking device further includes an upper limit cylinder and a lower limit cylinder that are spaced apart from top to bottom on the outside of the blanking seat. The piston rods of the upper limit cylinder and the lower limit cylinder both face the operation notch, and an extrusion block and a limit block are respectively disposed at the ends. The extrusion block and the limit block can respectively enter and exit the blanking channel under the action of the upper limit cylinder and the lower limit cylinder. The distance between the limit block and the extrusion block in the vertical direction is greater than the height of one commutator body and less than the sum of the heights of two commutator bodies.

[0023] By adopting the above technical solution, the lower limit cylinder is used to drive the limit block into the blanking channel to block the downward fall of the upper commutator body, and the upper limit cylinder drives the extrusion block to press against the surface of the second commutator body from bottom to top to limit it. When the lower limit block is moved out of the blanking channel under the drive of the lower limit cylinder, the lowermost commutator body drops downward. Then the limit block resets, and then the extrusion block releases the commutator body to make it fall onto the limit block, repeating the cycle to achieve the effect of the commutator body falling one by one.

[0024] The present invention is further configured as follows: The feeding mechanism further includes a material placing lifting device. The material placing lifting device includes a material placing lifting cylinder vertically disposed on the frame and a material placing frame disposed on the piston rod of the material placing lifting cylinder. The material placing table is fixedly connected to the material placing frame.

[0025] By adopting the above technical solution, the material placing lifting cylinder is used to drive the material placing table on the material placing frame to move upward, so that the material placing groove is aligned with the lower end opening of the blanking channel, so that the commutator body can accurately fall into the material placing groove.

[0026] In summary, the beneficial effects of the present invention are as follows:

[0027] 1. When the commutator body to be processed is placed in the material placing groove under the action of the blanking device, the positioning block is inserted into the wire welding seam corresponding to the lower end of the commutator body to achieve preliminary positioning. Then the commutator body is transferred to the fixing table by the material transfer mechanism, and further positioning is achieved by the cooperation of the positioning groove and the convex feet at the lower end of the commutator body, so that the milling groove device can accurately mill the required insulating groove at the correct position on the commutator body;

[0028] 2. In order to improve the accuracy of positioning, the dimensional fit between the positioning groove and the convex feet needs to be extremely tight, which may cause the convex feet to not be able to fully insert into the corresponding positioning groove when the commutator body is placed on the fixing table. Therefore, the pressing-down lifting cylinder is used to drive the pressing-down cylinder to press down on the commutator body to fix it tightly, enhance the stability of the commutator body, and ensure the processing accuracy at the same time.

[0029] 3. When the ejection sleeve moves upward, the ejection block is used to abut against the bottom of the convex foot, thereby jacking up the commutator body to loosen it, avoiding the situation that the commutator body cannot be removed from the fixing table due to the tight fit between the convex foot and the positioning groove. Description of the Drawings

[0030] Figure 1 is a schematic structural view of the processed commutator body in the background art;

[0031] Figure 2 is a schematic overall structural view of the present invention;

[0032] Figure 3 is a schematic top view of the partial structure of the present invention, used to show the positional relationship between the material placing table, the fixing table, the discharging cylinder and the material moving mechanism;

[0033] Figure 4 is an exploded structural view of the feeding cylinder and the blanking device of the present invention;

[0034] Figure 5 is an exploded structural view of the material placing table and the positioning sleeve of the present invention;

[0035] Figure 6 is an exploded structural view of the ejecting device and the fixing table of the present invention;

[0036] Figure 7 is Figure 2 an enlarged schematic view of part A in

[0037] Reference numerals: 1, commutator body; 11, central hole; 12, welding wire groove; 13, convex foot; 14, insulation groove; 2, frame; 3, feeding mechanism; 31, feeding cylinder; 32, blanking device; 321, blanking seat; 3211, blanking channel; 3212, operation notch; 322, upper limit cylinder; 3221, extrusion block; 323, lower limit cylinder; 3231, limit block; 33, material placing table; 331, material placing groove; 332, positioning sleeve; 3321, positioning block; 333, fastening hole; 334, fastening bolt; 335, positioning hole; 34, material placing lifting device; 341, material placing lifting cylinder; 342, material placing frame; 4, milling groove mechanism; 41, material positioning device; 411, fixing table; 4111, guide post; 4112, positioning groove; 412, lower pressing lifting cylinder; 413, lower pressing cylinder; 42, indexing and rotating device; 421, rotating seat; 422, servo motor; 43, ejecting device; 431, ejecting sleeve; 4311, ejecting block; 4312, operation edge; 432, ejecting lifting cylinder; 433, ejecting plate; 4331, limit groove; 44, milling groove device; 441, lifting motor; 442, milling cutter seat; 443, disc milling cutter; 5, discharging cylinder; 6, material transferring mechanism; 61, three-axis displacement device; 62, material transferring fixture. Detailed implementation mode

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] This embodiment discloses a milling machine for a commutator, as Figure 2 shown, which includes a frame 2, a feeding mechanism 3, a milling groove mechanism 4 and a discharging mechanism arranged on the frame 2, and a material transferring mechanism 6 for sequentially conveying workpieces from the feeding mechanism 3 to the milling groove mechanism 4 and the discharging mechanism.

[0040] As Figure 2 , Figure 4 shown, the feeding mechanism 3 includes a feeding cylinder 31, a blanking device 32 and a material placing table 33. Among them, the feeding cylinder 31 is fixedly connected to the frame 2, and its upper end opening is connected to a vibrating disk; the blanking device 32 includes a blanking seat 321 fixedly connected to the lower end of the feeding cylinder 31, and a blanking channel 3211 penetrating through the blanking seat 321 in the vertical direction and communicating with the feeding cylinder 31; the material placing table 33 is fixedly connected to the frame 2 below the blanking seat 321, and a circular material placing groove 331 (see Figure 5 ) is opened at the top of the material placing table 33, and the material placing groove 331 is aligned with the opening at the lower end of the blanking channel 3211 upward.

[0041] As Figure 2 , Figure 4As shown in the figure, the blanking device 32 further includes an upper limit cylinder 322 and a lower limit cylinder 323 that are fixedly spaced from top to bottom on the outside of the blanking seat 321. An operation notch 3212 that penetrates the blanking seat 321 outward in the vertical direction is provided on one side of the blanking channel 3211 where the upper limit cylinder 322 and the lower limit cylinder 323 are installed. The piston rods of the upper limit cylinder 322 and the lower limit cylinder 323 both face the operation notch 3212, and extrusion blocks 3221 and limit blocks 3231 made of rubber are fixedly connected to the ends respectively. The distance between the limit block 3231 and the extrusion block 3221 in the vertical direction is greater than the height of one commutator body 1 and less than the sum of the heights of two commutator bodies 1. By driving the limit block 3231 into the blanking channel 3211 using the lower limit cylinder 323, the falling of the upper commutator body 1 can be blocked. The upper limit cylinder 322 drives the extrusion block 3221 to press against the surface of the second commutator body 1 from bottom to top for positioning. When the lower limit block 3231 is moved out of the blanking channel 3211 by the lower limit cylinder 323, the lowermost commutator body 1 drops downward into the material placement groove 331. Then, the limit block 3231 resets, and the extrusion block 3221 releases the commutator body 1 to let it fall onto the limit block 3231. This process is repeated to achieve the effect of the commutator bodies 1 falling one by one.

[0042] As Figure 2 , Figure 3 shown in the figure, a material placement lifting device 34 is fixedly installed on the frame 2. The material placement lifting device 34 includes a material placement lifting cylinder 341 fixedly installed on the frame 2 in the vertical direction and a material placement frame 342 fixed to the piston rod of the material placement lifting cylinder 341. The material placement table 33 is fixedly connected to the material placement frame 342. By using the material placement lifting cylinder 341, the material placement table 33 on the material placement frame 342 can be driven to move upward, making the material placement table 33 approach the lower end opening of the blanking channel 3211 (see Figure 4 ), so that the commutator body 1 can accurately fall into the material placement groove 331 and prevent the commutator body 1 from falling out.

[0043] As Figure 5 shown in the figure, an annular positioning sleeve 332 is placed along the axis in the material placement groove 331. The outer wall of the positioning sleeve 332 is in clearance fit with the inner wall of the material placement groove 331. A fastening hole 333 that penetrates into the material placement groove 331 is provided on the outer wall of the material placement table 33. The fastening hole 333 is aligned with the positioning sleeve 332 located in the material placement groove 331, and a fastening bolt 334 is threadedly connected in the fastening hole 333. By tightening the fastening bolt 334, the end passing through the fastening hole 333 abuts against the surface of the positioning sleeve 332 for fixation, thereby realizing the detachable installation of the positioning sleeve 332 for convenient replacement.

[0044] As Figure 5As shown in the figure, several positioning blocks 3321 protruding upward are integrally formed at the upper end of the positioning sleeve 332. The arrangement of the positioning blocks 3321 corresponds to the welding wire grooves 12 at the lower end of the commutator body 1. The top ends of the positioning blocks 3321 are formed into pointed tops by chamfering on both sides, which facilitates the positioning blocks 3321 to be aligned and inserted into the welding wire seams at the lower end of the commutator body 1. Positioning holes 335 penetrating both sides of the placement groove 331 are radially formed on the placement table 33. The positioning holes 335 can be covered by any one of the positioning blocks 3321 at the upper end of the positioning sleeve 332 located in the placement groove 331, so that the operator can observe the position of the positioning blocks 3321 through the positioning holes 335, determine the installation angle of the positioning sleeve 332 in the placement groove 331, and facilitate the subsequent processing and positioning of the commutator body 1; alternatively, an infrared sensor can be installed on the placement table 33 to enable the infrared rays to pass through the positioning holes 335 to achieve automatic induction and calibration.

[0045] As Figure 2 shown in the figure, the grooving mechanism 4 includes a material positioning device 41, a indexing and rotating device 42 and a grooving device 44. Among them, the indexing and rotating device 42 includes a servo motor 422 and a rotating seat 421. The servo motor 422 is installed below the frame 2, and the rotating seat 421 is fixedly installed on the output shaft of the servo motor 422 passing upward through the frame 2; see Figure 6 , the material positioning device 41 includes a fixed table 411 fixedly installed at the upper end of the rotating seat 421 and having a cylindrical shape. A guiding column 4111 matching the central hole 11 of the commutator body 1 is fixedly provided along the axis at the top end of the fixed table 411. A number of positioning grooves 4112 matching the lower end lug 13 of the commutator body 1 are evenly formed in the circumferential direction on the side wall of the fixed table 411; see Figure 3 、 Figure 7 , the grooving device 44 includes a lifting motor 441, a milling cutter seat 442 and a disc milling cutter 443 installed on one side of the fixed table 411. The lifting motor 441 drives the milling cutter seat 442 to perform vertical lifting movement through a screw rod lifting device, and the disc milling cutter 443 is driven by a motor installed on the milling cutter seat 442. The disc milling cutter 443 can move to one side of the top end of the fixed table 411 under the drive of the milling cutter seat 442 to perform milling processing on the commutator body 1 sleeved on the guiding column 4111.

[0046] As Figure 6 shown in the figure, in order to improve the positioning accuracy, the dimensional fit between the positioning groove 4112 and the lug 13 needs to be extremely tight, which may cause the lug 13 to not be fully inserted into the corresponding positioning groove 4112 when the commutator body 1 is placed on the fixed table 411. Therefore, a downward pressing and lifting cylinder 412 is fixedly installed on the frame 2 above the fixed table 411, see Figure 2 and Figure 7, the piston rod of the downward pressing lifting cylinder 412 is vertically downward, and a downward pressing cylinder 413 is fixedly connected to the end of the piston rod along the axis of the fixed table 411. A guiding hole matching with the guiding column 4111 is opened at the bottom of the downward pressing cylinder 413 along the axis. By driving the downward pressing cylinder 413 with the downward pressing lifting cylinder 412, the commutator body 1 is pressed and fixed downward, enhancing the stability of the commutator body 1 and ensuring the machining accuracy at the same time. And the outer diameter of the downward pressing cylinder 413 is smaller than the outer diameter of the commutator body 1, and the difference between the two outer diameters is smaller than the depth of the insulating groove 14 to be opened on the surface of the commutator body 1, avoiding damaging the downward pressing cylinder 413 when the disc milling cutter 443 mills the groove downward.

[0047] As Figure 6 shown, the groove milling mechanism 4 further includes a blanking device 43. The blanking device 43 includes an ejecting sleeve 431 slidably connected to the outside of the fixed table 411 along the axis. An ejecting block 4311 matching with the positioning groove 4112 is integrally formed on the inner wall of the ejecting sleeve 431. And an ejecting lifting cylinder 432 is fixedly installed on the frame 2. The end of the piston rod of the ejecting lifting cylinder 432 is fixedly connected with an ejecting plate 433 arranged in a horizontal U shape. Limiting grooves 4331 are respectively and oppositely opened on the two side walls inside the U-shaped opening of the ejecting plate 433. An annular operating edge 4312 is integrally formed on the outer wall of the ejecting sleeve 431, and the operating edge 4312 is simultaneously matched with the two limiting grooves 4331. When the commutator body 1 needs to be ejected after machining, the ejecting lifting cylinder 432 extends the piston rod to push the ejecting plate 433 to move upward. And both sides of the operating edge 4312 are located in the limiting grooves 4331, so that the ejecting sleeve 431 will move upward driven by the ejecting plate 433. The ejecting block 4311 is used to top against the bottom of the lug 13, so as to eject the commutator body 1 upward to loosen it, avoiding that the commutator body 1 cannot be taken off from the fixed table 411 because of the tight fit between the lug 13 and the positioning groove 4112.

[0048] As Figure 3 shown, the material transferring mechanism 6 includes a three-axis displacement device 61 fixedly installed on the frame 2 and two material transferring clamps 62 installed on the three-axis displacement device 61. The three-axis displacement device 61 can simultaneously drive the two material transferring clamps 62 to move along the XYZ three axes. And the distance between the two material transferring clamps 62 is equal to the distance between the material placing table 33 and the fixed table 411, and is also equal to the distance between the fixed table 411 and the discharging mechanism. The discharging mechanism in this embodiment is a discharging cylinder 5 with an upward opening. The material placing table 33, the fixed table 411 and the discharging cylinder 5 are arranged in a straight line, and the horizontal heights of their tops are similar. Then, the material transferring mechanism 6 can simultaneously clamp the unprocessed commutator body 1 on the material placing table 33 and the processed commutator body 1 on the fixed table 411 and convey them to the next working station at the same time.

[0049] The specific principle of this embodiment is as follows:

[0050] The blanking device 32 causes the commutator body 1 to be processed to fall into the material placement groove 331 on the material placement table 33 one by one, and the positioning block 3321 on the positioning sleeve 332 is inserted into the corresponding wire welding seam at the lower end of the commutator body 1 to achieve preliminary positioning; then the material transfer fixture 62 first moves downward under the action of the three-axis displacement device 61 and clamps the commutator body 1 to be processed, drives the commutator body 1 to move upward to separate from the material placement table 33, and transfers it above the fixed table 411. Then the commutator body 1 is sleeved downward on the guide post 4111, and the convex feet 13 at the lower end of the commutator body 1 enter the corresponding positioning grooves 4112; next, the pressing cylinder 413 is used to press and fix the commutator body 1 downward, and the milling groove device 44 is used to perform milling groove processing operations; after processing, the pressing cylinder 413 moves upward, the ejector device 43 ejects and loosens the commutator body 1, and finally the processed commutator body 1 is conveyed to the discharge cylinder 5 by the material transfer mechanism 6, and at the same time, the next commutator body 1 is moved to the fixed table 411 for milling groove processing operations.

[0051] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A grooving machine for a commutator, comprising a frame (2), a feeding mechanism (3) arranged on the frame (2), a grooving mechanism (4), a discharging mechanism, and a material transferring mechanism (6) for sequentially conveying a workpiece from the feeding mechanism (3) to the grooving mechanism (4) and the discharging mechanism; characterized in that: The feeding mechanism (3) includes a feeding cylinder (31), a blanking device (32) and a material placing table (33); a circular material placing groove (331) is provided at the top of the material placing table (33), and an annular positioning sleeve (332) is arranged along the axis in the material placing groove (331). A plurality of upwardly protruding positioning blocks (3321) are provided at the upper end of the positioning sleeve (332), and the positioning blocks (3321) are arranged corresponding to the welding wire grooves (12) at the lower end of the commutator body (1); the milling groove mechanism (4) includes a material positioning device (41), a indexing and rotating device (42) and a milling groove device (44); the material positioning device (41) includes a cylindrical fixing table (411), and a guiding column (4111) that cooperates with the central hole (11) of the commutator body (1) is arranged along the axis at the top of the fixing table (411); a plurality of positioning grooves (4112) that cooperate with the lower convex feet (13) of the commutator body (1) are evenly arranged in the circumferential direction on the side wall of the fixing table (411); the top of the positioning block (3321) forms a pointed top by chamfering both sides; the feeding mechanism (3) further includes a material placing lifting device (34); the material placing lifting device (34) includes a material placing lifting cylinder (341) arranged vertically on the frame (2), and a material placing frame (342) arranged on the piston rod of the material placing lifting cylinder (341), and the material placing table (33) is fixedly connected to the material placing frame (342).

2. The grooving machine for a commutator according to claim 1, characterized in that: The outer wall of the positioning sleeve (332) is in clearance fit with the inner wall of the material placing groove (331); a fastening hole (333) that penetrates into the material placing groove (331) is provided on the outer wall of the material placing table (33), and the fastening hole (333) is aligned with the positioning sleeve (332) located in the material placing groove (331); a fastening bolt (334) is threadedly connected in the fastening hole (333).

3. The grooving machine for a commutator according to claim 1, characterized in that: Positioning holes (335) that penetrate both sides of the material placing groove (331) are radially provided on the material placing table (33), and the positioning holes (335) can be covered by any one of the positioning blocks (3321) at the upper end of the positioning sleeve (332) located in the material placing groove (331).

4. The grooving machine for a commutator according to claim 1, characterized in that: A downward pressing lifting cylinder (412) is provided above the fixing table (411) on the frame (2), the piston rod of the downward pressing lifting cylinder (412) is arranged vertically downward, and a downward pressing cylinder (413) is arranged along the axis of the piston rod at the end; a guiding hole that cooperates with the guiding column (4111) is provided along the axis at the bottom of the downward pressing cylinder (413); the difference between the outer diameter of the downward pressing cylinder (413) and the commutator body (1) is less than the depth of the insulating groove (14) to be opened on the surface of the commutator body (1).

5. The grooving machine for a commutator according to claim 4, characterized in that: The milling groove mechanism (4) further includes a material ejecting device (43); the material ejecting device (43) includes an ejecting sleeve (431) slidably connected along the axis outside the fixing table (411), and ejecting blocks (4311) that cooperate with the positioning grooves (4112) are arranged on the inner wall of the ejecting sleeve (431).

6. The grooving machine for a commutator according to claim 5, characterized in that: The ejecting device (43) further includes an ejecting lifting cylinder (432) vertically arranged on the frame (2), and an ejecting plate (433) arranged on the piston rod of the ejecting lifting cylinder (432); the ejecting plate (433) is horizontally arranged in a U shape, and the ejecting sleeve (431) is located within the U-shaped opening of the ejecting plate (433); limiting grooves (4331) are respectively and oppositely formed on the inner walls of both sides of the U-shaped opening, and a ring-shaped operating edge (4312) is arranged on the outer wall of the ejecting sleeve (431), and the operating edge (4312) is simultaneously engaged with the limiting grooves (4331) on both sides.

7. The grooving machine for a commutator according to claim 1, characterized in that: The blanking device (32) includes a blanking seat (321) arranged on the frame (2), a blanking channel (3211) vertically penetrating through the blanking seat (321), and an operating notch (3212) vertically arranged on one side of the blanking channel (3211) and penetrating through the blanking seat (321) outward; the blanking device (32) further includes an upper limiting cylinder (322) and a lower limiting cylinder (323) arranged at intervals from top to bottom on the outside of the blanking seat (321), the piston rods of the upper limiting cylinder (322) and the lower limiting cylinder (323) both face the operating notch (3212) and are respectively provided with a pressing block (3221) and a limiting block (3231) at the ends, and the pressing block (3221) and the limiting block (3231) can respectively enter and exit the blanking channel (3211) under the action of the upper limiting cylinder (322) and the lower limiting cylinder (323); the distance between the limiting block (3231) and the pressing block (3221) in the vertical direction is greater than the height of a commutator body (1) and less than the sum of the heights of two commutator bodies (1).

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