CN223588487U - A positioning fixture and machining structure for combined tooth electrical discharge machining - Google Patents
A positioning fixture and machining structure for combined tooth electrical discharge machiningInfo
- Publication number
- CN223588487U CN223588487U CN202423279664.4U CN202423279664U CN223588487U CN 223588487 U CN223588487 U CN 223588487U CN 202423279664 U CN202423279664 U CN 202423279664U CN 223588487 U CN223588487 U CN 223588487U
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- positioning
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- gear
- bottom plate
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Abstract
本实用新型公开了一种结合齿电火花加工用定位工装及加工结构，所述结合齿电火花加工用定位工装，底板用于支撑、连接各部件以及确保各部件的位置关系，定位芯柱用于与结合齿轮的内孔配合，实现结合齿轮在底板上的粗定位，定位销与齿形定位板上的定位孔配合，实现结合齿轮在底板上的精确定位，齿形定位部与外齿上的缺口配合，实现结合齿轮齿形在底板上的周向定位和限位；该定位工装不仅使用简单，且实现了对结合齿轮齿形的周向定位安装，可有效解决目前装夹结合齿轮存在周向定位困难的问题，有利于提高加工效率、保证电火花加工齿尖的精度。
This utility model discloses a positioning fixture and machining structure for EDM of gears. The positioning fixture includes a base plate for supporting and connecting various components and ensuring their positional relationship; a positioning core for engaging with the inner hole of the gear to achieve coarse positioning of the gear on the base plate; a positioning pin for engaging with the positioning hole on the tooth-shaped positioning plate to achieve precise positioning of the gear on the base plate; and a tooth-shaped positioning part for engaging with the notch on the outer tooth to achieve circumferential positioning and limiting of the gear teeth on the base plate. This positioning fixture is not only simple to use but also achieves circumferential positioning and installation of the gear teeth, effectively solving the current problem of difficult circumferential positioning when clamping gears, thus improving machining efficiency and ensuring the accuracy of the EDM tooth tips.
Description
Technical Field
The utility model belongs to the technical field of machining, and particularly relates to a positioning tool for combined tooth electric spark machining and a machining structure.
Background
The combined gear is a gear structure with an external tooth part and a boss part, and is characterized by a hollow hub, such as a forging process of a combined gear in Chinese patent CN111730021A, wherein part of external teeth of the combined gear have the characteristic of narrowing to form tooth tips at one end far away from the boss, the combined gear has the advantages of good structural strength and stable transmission, the gear structure is characterized in that part of teeth are removed from the circumferential space of a conventional gear, a plurality of notches are formed on the tooth surface, and the notches exist on the tooth surface, so that the gear with the notch can generate a certain special motion state in the rotating process, and in a certain special mechanical system, a special combined gear with the characteristics of the gear with the notch and the tooth tips is usually used for meeting the special rotating condition.
At present, the outer tooth part of the combined gear is generally machined on a boss blank through milling, and then the outer tooth is subjected to tooth grinding forming, but the tooth grinding forming is low in machining efficiency, and the machining precision of the outer tooth and the tooth tip of the special combined gear is limited. The electric spark machining is to utilize the pulse spark discharge generated between the tool electrode and the workpiece to gradually etch away the metal material by utilizing the local and instantaneous high temperature generated during the discharge, so as to realize the accurate machining. In order to perform electric spark machining on the tooth tip of the special combined gear, the applicant tries to clamp the tooth tip by using a chuck, but found after the trial, because the chuck realizes clamping fixation and lack of circumferential positioning by radially clamping the outer circumferential surface of the hub part of the combined gear, the circumferential positioning of the outer tooth is difficult during electric spark machining, so that the clamping time is long, the machining precision of the tooth tip is easily influenced, and the mass production is not suitable.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a positioning tool and a processing structure for combined tooth electric spark processing, which solve the technical problem that the prior clamping of the special combined gear is difficult in circumferential positioning, and achieve the effect of improving the clamping speed and the processing precision.
In order to solve the technical problems, the utility model adopts the following technical scheme:
The positioning tool for the combined tooth electric spark machining comprises a transverse bottom plate, a plurality of positioning core columns and positioning pins, wherein the positioning core columns are vertically and upwards protruded and are used for being matched with inner holes of a combined gear, the positioning pins are circumferentially distributed by taking the positioning core columns as the center, the positioning tool also comprises tooth-shaped positioning plates which are arranged above the bottom plate at intervals in parallel and are annular, a plurality of positioning holes are vertically and longitudinally formed in the tooth-shaped positioning plates in a penetrating mode, the positioning pins penetrate through the positioning holes one by one and are in sliding fit, so that the tooth-shaped positioning plates can slide along the positioning pins, the inner holes of the tooth-shaped positioning plates are coaxial with the positioning core columns, the diameter of the inner holes of the tooth-shaped positioning plates is larger than that of the positioning core columns, a plurality of tooth-shaped positioning parts which are radially protruded are circumferentially distributed on the wall of the inner holes of the tooth-shaped positioning plates, and the tooth-shaped positioning parts are used for being matched with gaps on outer teeth of the combined gear one by one.
Further, a pressing plate parallel to the bottom plate is arranged above the positioning core column at intervals, a connecting hole is vertically and fixedly arranged on the pressing plate in a penetrating mode, a bolt is arranged in the connecting hole in a sliding mode, the head of the bolt is abutted to the upper surface of the pressing plate, and the tail of the bolt faces downwards and is in threaded connection with the positioning core column or the bottom plate.
Further, the pressing plate is provided with a yielding gap extending from the side surface of the pressing plate to the connecting hole, and the width of the yielding gap is larger than or equal to the diameter of the connecting hole.
Further, the bottom plate is vertically penetrated with a mounting hole, the positioning core column is a component mutually independent with the bottom plate, and the lower end of the positioning core column is positioned in the mounting hole.
Further, the locating core column is provided with a yielding hole in a penetrating mode, an upward cylinder of the telescopic rod is vertically connected below the bottom plate, the telescopic rod of the cylinder stretches into the yielding hole and is in sliding fit with the cylinder, and the tail of the bolt is in threaded connection with the telescopic rod of the cylinder through the yielding hole.
Further, a cushion block is connected below the pressing plate, and the lower end of the cushion block is lower than the air cylinder and is used for installing and supporting the positioning tool.
Further, a plurality of pinholes have been seted up to the upper surface of bottom plate, and the locating pin is the part mutually independent with the bottom plate, and the locating pin corresponds with the pinhole one by one, and the locating pin lower extreme is located the pinhole that corresponds.
Further, the upper end of the locating pin is tapered.
The utility model further comprises a machining structure for combined tooth electric spark machining, the machining structure comprises the combined gear to be machined and the positioning tool for combined tooth electric spark machining, the combined gear is vertically abutted between the bottom plate and the pressing plate and sleeved outside the positioning core column, the diameter of the positioning core column is matched with the diameter of an inner hole of the combined gear, the tooth-shaped positioning plate is abutted on the step surface of the combined gear and sleeved outside the outer tooth of the combined gear, the diameter of the inner hole of the tooth-shaped positioning plate is larger than the diameter of the outer tooth of the combined gear, the size of the tooth-shaped positioning part is matched with a notch on the outer tooth of the combined gear, and the tooth-shaped positioning part is one-to-one positioned in the notch.
Compared with the prior art, the utility model has the following beneficial effects:
The positioning tool for combined tooth electric spark machining is characterized in that a bottom plate is used for supporting, connecting and ensuring the position relation of all parts, a positioning core column is used for being matched with an inner hole of a combined gear to realize coarse positioning of the combined gear on the bottom plate, a positioning pin is matched with a positioning hole on a tooth-shaped positioning plate to realize accurate positioning of the combined gear on the bottom plate, and a tooth-shaped positioning part is matched with a notch on an external tooth to realize circumferential positioning and limiting of the tooth shape of the combined gear on the bottom plate; the positioning tool is simple to use, realizes circumferential positioning and installation of the tooth shape of the combined gear, can effectively solve the problem that the existing clamping combined gear is difficult to circumferentially position, and is beneficial to improving the machining efficiency and ensuring the precision of the electric spark machining tooth tip.
Drawings
FIG. 1 is a front view of a notched external tooth coupling gear as described in the background art;
FIG. 2 is a schematic cross-sectional view of a notched external tooth coupling gear as described in the background art;
FIG. 3 is an enlarged partial schematic view of the external teeth of FIG. 2;
FIG. 4 is a front view of a machining structure for spark machining of a bonding tooth according to an embodiment;
FIG. 5 is a schematic cross-sectional view of a machining structure for spark machining of a bonding tooth according to an embodiment;
FIG. 6 is a front view of a toothed locating plate according to an embodiment;
The base plate 1, the positioning core column 2, the positioning pin 3, the tooth-shaped positioning plate 4, the positioning hole 5, the tooth-shaped positioning part 6, the combined gear 7, the external teeth 8, the notch 9, the pressing plate 10, the bolt 11, the yielding notch 12, the yielding hole 13, the air cylinder 14, the telescopic rod 15, the cushion block 16 and the tooth tip 17.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
Examples:
Referring to fig. 4, 5 and 6, the positioning tool for combined tooth electric spark machining comprises a transverse bottom plate 1, wherein the bottom plate 1 is provided with a positioning stem 2 and a positioning pin 3 which are vertically and upwards protruded, the positioning stem 2 is used for being matched with an inner hole of a combined gear 7 (a special combined gear described in the background art), the positioning pins 3 are distributed circumferentially around the positioning stem 2, the positioning tool further comprises a plurality of tooth-shaped positioning plates 4 which are arranged above the bottom plate 1 at intervals in parallel and are annular, the tooth-shaped positioning plates 4 vertically penetrate through the positioning holes 5, the positioning pins 3 penetrate through the positioning holes 5 one by one and are in sliding fit, so that the tooth-shaped positioning plates 4 can slide along the positioning pins 3, the inner holes of the tooth-shaped positioning plates 4 are coaxial with the positioning stem 2, the diameter of the inner holes of the tooth-shaped positioning plates 4 is larger than that of the positioning stem 2, a plurality of tooth-shaped positioning parts 6 which are radially protruded are circumferentially distributed on the inner hole walls of the tooth-shaped positioning plates 4 are used for being matched with notches 9 on outer teeth 8 of the combined gear 7 one by one.
When the positioning tool for combined tooth electric spark machining is used, the tooth-shaped positioning plate 4 is firstly slid upwards to be separated from the positioning pin 3, and the tooth-shaped positioning plate 4 is taken down; the method comprises the steps of taking a combined gear 7 which is in a boss shape and has a notch 9 on an outer tooth 8 and a tooth tip 17 at one end far away from the boss, enabling one end with a small outer diameter of the combined gear 7 to face upwards, taking a tooth-shaped positioning plate 4 with an inner hole diameter larger than the outer tooth 8 of the combined gear 7, sleeving the tooth-shaped positioning plate 4 outside the outer tooth 8 of the combined gear 7, enabling the tooth-shaped positioning part 6 to be clamped into the notch 9 on the outer tooth 8 one by one, sleeving the combined gear 7 outside a positioning stem 2, enabling the positioning stem 2 to be matched with the inner hole of the combined gear 7 to roughly position the center of the combined gear 7, sleeving the combined gear 7 and placing the combined gear on a bottom plate 1, adjusting the combined gear 7 and the tooth-shaped positioning plate 4 in a rotating mode, enabling a positioning pin 3 to pass through a positioning hole 5 of the tooth-shaped positioning plate 4 one by one, accurately positioning the tooth-shaped position and limiting the circumferential rotation of the combined gear 7, enabling the tooth-shaped positioning plate 4 and the tooth-shaped positioning part 6 to not shade the tooth tip 17 in the axial direction, and not affecting the machining of the tooth-shaped tip 17, and enabling the tooth-shaped positioning plate 4 to be clamped to be lower than the tooth-shaped positioning plate 17 in a rough machining operation, and ensuring more tooth-shaped machining space to be ensured by controlling the thickness of the tooth-shaped positioning plate 4 to be clamped than the tooth-shaped tip 17.
The positioning tool for combined tooth electric spark machining is characterized in that a base plate 1 is used for supporting and connecting all parts and ensuring the position relation of all parts, a positioning core column 2 is used for being matched with an inner hole of a combined gear 7, coarse positioning of the combined gear 7 on the base plate 1 is achieved, a positioning pin 3 is matched with a positioning hole 5 on a tooth-shaped positioning plate 4, accurate positioning of the combined gear 7 on the base plate 1 is achieved, a tooth-shaped positioning part 6 is matched with a notch 9 on an outer tooth 8, circumferential positioning and limiting of the tooth shape of the combined gear 7 on the base plate 1 are achieved, the positioning tool is simple to use, circumferential positioning installation of the tooth shape of the combined gear 7 is achieved, the problem that the existing clamping of the combined gear 7 is difficult in circumferential positioning is effectively solved, machining efficiency is improved, and accuracy of an electric spark machining tooth tip 17 is guaranteed.
Referring to fig. 4 and 5, a pressing plate 10 parallel to the bottom plate 1 is disposed above the positioning stem 2 at intervals, a connecting hole is vertically and penetratingly formed in the pressing plate 10, a bolt 11 is slidably and penetratingly formed in the connecting hole, the head of the bolt 11 abuts against the upper surface of the pressing plate 10, and the tail of the bolt 11 faces downwards and is in threaded connection with the positioning stem 2 or the bottom plate 1.
Like this, before using, unscrew bolt 11 and take off clamp plate 10, adorn on the combination gear 7, place clamp plate 10 in combination gear 7 top again to make clamp plate 10 compress tightly combination gear 7 fixed on bottom plate 1 through screwing up bolt 11, thereby with combination gear 7 fixed completely, avoid combining gear 7 unexpected removal in the course of working, not only guarantee that the processing goes on smoothly, and be favorable to improving machining precision.
Referring to fig. 4 and 5, the pressing plate 10 has a relief notch 12 extending from a side surface thereof to the connecting hole, and a width of the relief notch 12 is greater than or equal to a diameter of the connecting hole.
Like this, when loading into and take off combination gear 7, only need upwards twist up certain height with bolt 11 and loosen clamp plate 10, can transversely take off clamp plate 10 through the breach of stepping down 12, and need not to screw out with bolt 11 completely, make this location frock convenient to use, be favorable to improving the practicality of this location frock.
Referring to fig. 4 and 5, a mounting hole is vertically formed in the bottom plate 1 in a penetrating manner, the positioning stem 2 is a component independent of the bottom plate 1, and the lower end of the positioning stem 2 is located in the mounting hole.
Like this, locating stem 2 and bottom plate 1 are mutually independent part, not only be convenient for process, improve the dimensional accuracy of locating stem 2, and locating stem 2 pass through the outer disc respectively with mounting hole and the hole cooperation of combining gear 7, be favorable to improving the position degree of combining gear 7 on bottom plate 1 to cooperation locating pin 3 and profile of tooth locating plate 4 realize combining gear 7's accurate positioning.
Correspondingly, referring to fig. 4 and 5, the upper surface of the bottom plate 1 is provided with a plurality of pin holes, the positioning pins 3 are mutually independent components with the bottom plate 1, the positioning pins 3 are in one-to-one correspondence with the pin holes, and the lower ends of the positioning pins 3 are positioned in the corresponding pin holes.
Like this, locating pin 3 and bottom plate 1 are mutually independent part too, not only be convenient for process, improve the dimensional accuracy of locating pin 3, and locating pin 3 pass through the outer disc respectively with pinhole and the locating hole 5 cooperation on the profile of tooth locating plate 4 to with the cooperation of location stem 2 improve the position degree of combining gear 7 on bottom plate 1, realize combining the accurate location of gear 7.
In this embodiment, there is the tapering locating pin 3 upper end to when installing profile of tooth locating plate 4 downwards, locating pin 3 penetrates locating hole 5 more easily, is favorable to reducing the use degree of difficulty of this location frock, improves its practicality.
Referring to fig. 4 and 5, the positioning stem 2 is provided with a relief hole 13, an air cylinder 14 with an upward telescopic rod 15 is vertically connected below the bottom plate 1, the telescopic rod 15 of the air cylinder 14 stretches into the relief hole 13 and is in sliding fit with the relief hole, the tail of the bolt 11 is in threaded connection with the telescopic rod 15 of the air cylinder 14 through the relief hole 13, and the tail of the bolt 11 is indirectly connected with the bottom plate 1 through the air cylinder 14.
Therefore, when the combined gear 7 is used, the pressing plate 10 can be loosened to transversely take down the combined gear 7 or the pressing plate 10 can be pressed downwards by only controlling the cylinder 14 to act and driving the bolt 11 to lift through the telescopic rod 15.
In the embodiment, a cushion block 16 is connected below the pressing plate 10, the lower end of the cushion block 16 is lower than the air cylinder 14 for mounting and supporting the positioning tool on processing equipment, compared with the symmetry degree of a tooth tip 17 clamped and processed by a chuck, the symmetry degree of the tooth tip 17 can be controlled within 0.03mm by adopting the positioning tool for clamping and processing, and compared with the chuck clamping, the repeated rotation of the chuck clamping and the circumferential positioning of the combined gear 7 are simpler and more reliable, so that the processing efficiency is doubled.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the present utility model, and all such modifications and equivalents are included in the scope of the claims.
Claims (9)
1. The positioning tool for the electric spark machining of the combined teeth is characterized by comprising a transverse bottom plate, a plurality of tooth-shaped positioning plates which are arranged above the bottom plate at intervals in parallel and are annular, and a plurality of positioning holes which vertically penetrate through the tooth-shaped positioning plates, wherein the positioning pins penetrate through the positioning holes one by one and are in sliding fit, so that the tooth-shaped positioning plates can slide along the positioning pins one by one, the inner holes of the tooth-shaped positioning plates are coaxial with the positioning core posts, the diameter of the inner holes of the tooth-shaped positioning plates is larger than that of the positioning core posts, a plurality of tooth-shaped positioning parts which are radially protruding are circumferentially distributed on the wall of the inner holes of the tooth-shaped positioning plates, and the tooth-shaped positioning parts are used for being matched with notches on the outer teeth of the combined gears one by one.
2. The positioning tool for combined tooth electric spark machining is characterized in that a pressing plate parallel to the bottom plate is arranged above the positioning core column at intervals, a connecting hole is vertically formed in the pressing plate in a penetrating mode, a bolt is arranged in the connecting hole in a sliding mode, the head of the bolt abuts against the upper surface of the pressing plate, and the tail of the bolt faces downwards and is in threaded connection with the positioning core column or the bottom plate.
3. The positioning tool for combined tooth electric spark machining according to claim 2, wherein the pressing plate is provided with a yielding gap extending from the side surface of the pressing plate to the connecting hole, and the width of the yielding gap is larger than or equal to the diameter of the connecting hole.
4. The positioning tool for combined tooth electric spark machining according to claim 2, wherein the base plate is vertically provided with a mounting hole in a penetrating mode, the positioning core column is a part independent of the base plate, and the lower end of the positioning core column is located in the mounting hole.
5. The positioning tool for combined tooth electric spark machining of claim 4, wherein the positioning core column is provided with a relief hole in a penetrating mode, an upward cylinder of a telescopic rod is vertically connected below the bottom plate, the telescopic rod of the cylinder stretches into the relief hole and is in sliding fit with the relief hole, and the tail of the bolt is in threaded connection with the telescopic rod of the cylinder through the relief hole.
6. The positioning tool for combined tooth electric spark machining of claim 5, wherein a cushion block is connected below the pressing plate, and the lower end of the cushion block is lower than the cylinder and is used for installing and supporting the positioning tool.
7. The positioning tool for combined tooth electric spark machining according to claim 2, wherein the upper surface of the bottom plate is provided with a plurality of pin holes, the positioning pins are mutually independent parts of the bottom plate, the positioning pins are in one-to-one correspondence with the pin holes, and the lower ends of the positioning pins are positioned in the corresponding pin holes.
8. The positioning tool for combined tooth electric spark machining according to claim 2, wherein the upper end of the positioning pin is tapered.
9. The machining structure for combined tooth electric spark machining is characterized by comprising a combined gear to be machined and the combined tooth electric spark machining positioning tool according to any one of claims 2-8, wherein the combined gear vertically abuts between a bottom plate and a pressing plate and is sleeved outside a positioning core column, the diameter of the positioning core column is matched with the diameter of an inner hole of the combined gear, a tooth-shaped positioning plate abuts on a step surface of the combined gear and is sleeved outside an outer tooth of the combined gear, the diameter of the inner hole of the tooth-shaped positioning plate is larger than the diameter of the outer tooth of the combined gear, the size of a tooth-shaped positioning part is matched with a notch on the outer tooth of the combined gear, and the tooth-shaped positioning part is one-to-one positioned in the notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423279664.4U CN223588487U (en) | 2024-12-30 | 2024-12-30 | A positioning fixture and machining structure for combined tooth electrical discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202423279664.4U CN223588487U (en) | 2024-12-30 | 2024-12-30 | A positioning fixture and machining structure for combined tooth electrical discharge machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223588487U true CN223588487U (en) | 2025-11-25 |
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ID=97735887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202423279664.4U Active CN223588487U (en) | 2024-12-30 | 2024-12-30 | A positioning fixture and machining structure for combined tooth electrical discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223588487U (en) |
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2024
- 2024-12-30 CN CN202423279664.4U patent/CN223588487U/en active Active
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