Helical gear forging and pressing die with trimming function

Abstract

The utility model relates to the technical field of bevel gear machining, and discloses a bevel gear forging and pressing die with a trimming function, the bevel gear forging and pressing die comprises a pier base, a die sleeve fixed on the pier base and a punch, the inner side space of the die sleeve is a forming die cavity, and a first groove is formed in the top end of the inner side face of the die sleeve; the groove bottom of the first groove is an inclined surface which is inclined upwards and is used for forming a blade part at the end part; and / or, a convex ring is fixed to the top end of the pier base, the inner wall of the convex ring is an inclined face inclining towards the outer side, and a second groove used for containing the convex ring is formed in the bottom end of the inner side face of the die sleeve; through the arrangement of the first groove with the blade part, the upper slitter edge of the blank can be automatically cut off through the blade part in the forging or demolding stage, subsequent secondary machining is not needed, and the machining efficiency is greatly improved; and through the arranged convex ring, the outer edge of the lower end of the blank can be extruded by the convex ring, and waste edges are prevented from being generated at the bottom end of the blank.

Description

Technical Field

[0001] The present application relates to the technical field of helical gear processing, and in particular to a helical gear forging die with a trimming function. Background Art

[0002] As one of the most basic parts for transmitting motion and power, cylindrical helical gears play a very important role in the industrial field.

[0003] With the rapid development of my country's automobile, aerospace and shipbuilding industries, the demand for gears is increasing, and higher requirements are also put forward for the variety, specification, precision, strength, cost, etc. of helical gears. The production of traditional helical gears adopts cutting processing technology, which uses bar blanks and forms them through multiple processes such as turning the end face, turning the inner and outer circles, drilling, hobbing, shaving and heat treatment. However, this method has the disadvantages of long production cycle, low production efficiency, waste of raw materials and easy cutting of metal fibers in the toothed part during processing. Therefore, cylindrical helical gears with high precision requirements are usually processed by die forging technology.

[0004] The traditional cylindrical helical gear forging die is similar to the Chinese utility model patent "Integrated intermediate gear forging die for wind turbines" with authorization announcement number CN216729378U, which is composed of a positioning die and a die forging die; the positioning die is composed of a upset die, a die and a pad fixedly arranged at the bottom of the die; the die forging die includes an upper pad and a lower pad corresponding to the upper and lower pads, and an upper circular plate, an upper punch and an upper spoke are fixedly arranged at the bottom of the upper pad; a lower circular plate, a lower die sleeve, an upper die sleeve, a lower punch and a lower spoke are fixedly arranged at the top of the lower pad; a material withdrawal hole penetrating the lower circular plate and the lower pad is arranged at the center of the top of the lower punch, and a material withdrawal rod is arranged in the material withdrawal hole.

[0005] In actual use, because the height of the blank before forging is higher than the die sleeve, after the forging is completed, a circle of waste edge extending outward will be generated at the top of the blank. Later, the blank needs to be transferred to the cutting station to cut the waste edge, and the processing efficiency is low.

[0006] In order to solve the above problems, the present application proposes a helical gear forging die with a trimming function. Utility Model Content

[0007] In order to solve the problem of low processing efficiency due to the need to transfer the blank to a cutting station for cutting the waste edges, the present application provides a helical gear forging die with a trimming function.

[0008] The helical gear forging die with trimming function provided in this application adopts the following technical solution:

[0009] A helical gear forging die with trimming function, comprising a pier seat, a die sleeve fixed on the pier seat and a punch, the inner space of the die sleeve is a forming die cavity, a first groove is provided at the top of the inner side surface of the die sleeve, the bottom of the first groove is an upwardly inclined surface for forming a cutting edge at the end;

[0010] And / or, a convex ring is fixed on the top of the pier, and the inner wall of the convex ring is an inclined surface inclined toward the outside, and a second groove for accommodating the convex ring is opened at the bottom end of the inner side surface of the mold sleeve.

[0011] Preferably, the top end of the blade is lower than the top surface of the mold sleeve.

[0012] Preferably, the top surface width of the convex ring is equal to the groove width of the second groove.

[0013] Preferably, the mold sleeve is provided with upper ventilation micropores;

[0014] And / or, lower ventilation micropores are provided on the pier.

[0015] Preferably, a trimming mechanism is further included, and the trimming mechanism is fixed to the top of the circumferential surface of the mold sleeve to cut off excess waste edges.

[0016] Preferably, the trimming mechanism comprises:

[0017] A retainer, the retainer being rotatably mounted on the mold sleeve;

[0018] A cutting mechanism is fixed on the retaining frame and is used for cutting off excess waste edges.

[0019] Preferably, the cutting mechanism comprises:

[0020] A fixing plate, the fixing plate being fixed on the retaining frame;

[0021] A knife seat, the knife seat is movably connected to the fixing plate;

[0022] A cutting tool, wherein the cutting tool is fixed on the tool holder and is a triangular tool;

[0023] A hydraulic cylinder is fixed on the fixing plate, and a piston rod of the hydraulic cylinder penetrates through the fixing plate and is fixedly connected to the tool holder.

[0024] Preferably, a guide rod penetrating the fixing plate is fixed on the knife seat.

[0025] Preferably, the trimming mechanism further comprises:

[0026] An annular guide rail, the annular guide rail is fixed on the circumferential surface of the mold sleeve, and guide grooves are provided on the top and bottom surfaces of the annular guide rail;

[0027] An outer gear ring, wherein the outer gear ring is supported and fixed on the annular guide rail by a support column;

[0028] A driving gear, the driving gear is rotatably mounted in the retaining frame and meshes with the outer gear ring;

[0029] A driving motor, the driving motor is fixed on the retaining frame and is used to drive the driving gear to rotate;

[0030] An adapter plate, the adapter plate being fixed to an end of the retaining frame;

[0031] Guide wheels, the two guide wheels are symmetrically distributed and rotatably arranged on the adapter plate, and the two guide wheels are respectively embedded in corresponding guide grooves.

[0032] In summary, this application includes the following beneficial technical effects:

[0033] 1. By providing the first groove with a blade, the upper scrap edge of the blank can be automatically cut off by the blade during the forging or demolding stage, without the need for subsequent secondary processing, which greatly improves the processing efficiency;

[0034] 2. The convex ring is arranged to squeeze the outer edge of the lower end of the blank to avoid waste edge at the bottom end of the blank.

[0035] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0037] Figure 2 It is a schematic diagram of the cross-sectional structure of the mold sleeve of the utility model;

[0038] Figure 3 This utility model Figure 2 A is an enlarged structural diagram;

[0039] Figure 4 This utility model Figure 2 The enlarged structural diagram at B in FIG.

[0040] Figure 5 It is a schematic diagram of the axonometric structure of the utility model;

[0041] Figure 6 This is an axonometric structural diagram of the trimming mechanism of the utility model;

[0042] Figure 7 This utility model Figure 6 A schematic diagram of the enlarged structure of the cutting mechanism;

[0043] Figure 8 This utility model Figure 6 The enlarged structural diagram at C in the figure.

[0044] Explanation of the reference numerals: 1. pier seat; 101. lower air permeable micropores; 102. convex ring; 2. die sleeve; 201. forming die cavity; 202. upper air permeable micropores; 203. first groove; 204. blade; 205. second groove; 3. punch; 4. trimming mechanism; 41. annular guide rail; 411. guide slide groove; 42. outer gear ring; 43. support column; 44. retaining frame; 45. driving gear; 46. driving motor; 47. cutting mechanism; 471. tool holder; 472. cutting tool; 473. fixing plate; 474. hydraulic cylinder; 475. guide rod; 48. adapter plate; 49. guide wheel. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-Figure 8 This application is described in further detail.

[0046] The embodiment of the present application discloses a helical gear forging die with a trimming function.

[0047] Example 1

[0048] Reference Figure 1-Figure 4 A helical gear forging die with trimming function comprises a pier seat 1, a die sleeve 2 fixed on the pier seat 1 and a punch 3, the inner space of the die sleeve 2 is a forming die cavity 201, a first groove 203 is provided at the top of the inner side surface of the die sleeve 2, the bottom of the first groove 203 is an upwardly inclined inclined surface for forming a blade 204 at the end, and by providing the first groove 203 with the blade 204, the upper waste edge of the blank can be automatically cut off by the blade 204 during the forging or demolding stage, without the need for subsequent secondary processing, thereby greatly improving the processing efficiency;

[0049] And / or, a convex ring 102 is fixed on the top of the pier 1, and the inner wall of the convex ring 102 is an inclined surface inclined toward the outside, and a second groove 205 for accommodating the convex ring 102 is opened at the bottom end of the inner side surface of the mold sleeve 2. The convex ring 102 can squeeze the outer edge of the lower end of the blank to avoid waste edge at the bottom end of the blank.

[0050] Preferably, by Figure 1-Figure 3As shown, in this embodiment, the top of the blade 204 is lower than the top surface of the die sleeve 2. During the forging process, the top edge of the blank will gradually extend outward, and the first groove 203 can squeeze the extended waste edge. During the forging or demolding stage, the upper waste edge of the blank can be automatically cut off by the blade 204.

[0051] Preferably, by Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the top surface width of the convex ring 102 is equal to the groove width of the second groove 205, that is, there is no gap between the mold sleeve 2 and the pier seat 1, and the inner edge of the top end of the convex ring 102 can reliably transition to the lower edge of the inner wall of the mold sleeve 2, further avoiding the generation of waste edges at the bottom end of the blank.

[0052] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, an upper air permeable micropore 202 is provided on the die sleeve 2, and the upper air permeable micropore 202 is used to discharge the air in the forming die cavity 201 from the upper part to avoid the air being unable to be discharged and affecting the forging forming;

[0053] And / or, a lower air permeable micropore 101 is opened on the pier 1, and the lower air permeable micropore 101 is used to discharge the air in the forming cavity 201 from the bottom to avoid the air being unable to be discharged and affecting the forging forming.

[0054] Example 2

[0055] Depend on Figure 5 As shown, in this embodiment, a trimming mechanism 4 is also included, and the trimming mechanism 4 is fixed to the top of the circumferential surface of the die sleeve 2 for cutting off excess scrap. When the top scrap of the blank is not completely cut off, the trimming mechanism 4 is used to perform trimming again.

[0056] Specifically, by Figure 5 and Figure 6 As shown, in this embodiment, the trimming mechanism 4 includes: a retaining frame 44 and a cutting mechanism 47. The retaining frame 44 is rotatably mounted on the mold sleeve 2, and the cutting mechanism 47 is fixed on the retaining frame 44 to cut off excess waste edges. The rotation of the retaining frame 44 drives the cutting mechanism 47 to perform a circular motion, thereby being able to cut off excess waste edges.

[0057] Further, by Figure 5-Figure 7As shown, in this embodiment, the cutting mechanism 47 includes: a fixed plate 473, a knife holder 471, a cutting tool 472 and a hydraulic cylinder 474. The fixed plate 473 is fixed on the retaining frame 44, the knife holder 471 is movably connected to the fixed plate 473, the cutting tool 472 is fixed on the knife holder 471, and the cutting tool 472 is a triangular tool. The hydraulic cylinder 474 is fixed on the fixed plate 473, and the piston rod of the hydraulic cylinder 474 passes through the fixed plate 473 and is fixedly connected to the knife holder 471. The hydraulic cylinder 474 is started, and the piston rod of the hydraulic cylinder 474 is used to push the knife holder 471 to move, so that the cutting tool 472 passes through the waste edge. Through the rotation of the retaining frame 44, the cutting tool 472 is driven to make a circular motion, which can cut off the excess waste edge.

[0058] Preferably, by Figure 5-Figure 7 As shown, in this embodiment, a guide rod 475 penetrating through the fixing plate 473 is fixed on the knife seat 471 for guiding the knife seat 471 to improve the stability of the knife seat 471 .

[0059] Optionally, by Figure 5-Figure 8 As shown, in this embodiment, the trimming mechanism 4 also includes: an annular guide rail 41, an outer gear ring 42, a driving gear 45, a driving motor 46, an adapter plate 48 and a guide wheel 49. The annular guide rail 41 is fixed on the circumferential surface of the mold sleeve 2, and guide grooves 411 are provided on the top and bottom surfaces of the annular guide rail 41. The outer gear ring 42 is supported and fixed on the annular guide rail 41 by a support column 43. The driving gear 45 is rotatably installed in the retaining frame 44 and meshes with the outer gear ring 42. The driving motor 46 is fixed on the retaining frame 44 to drive the driving gear 45 to rotate. The adapter plate 48 is fixed to the end of the retaining frame 44. Two guide wheels 49 are symmetrically distributed and rotatably arranged on the adapter plate 48, and the two guide wheels 49 are respectively embedded in the corresponding guide grooves 411. The driving motor 46 is started to drive the driving gear 45 to rotate. Under the meshing action, when the driving gear 45 rotates, it will make a circular motion along the outer circumference of the outer gear ring 42 and drive the retaining frame 44 to rotate.

[0060] It should be noted that the drive motor 46 and the hydraulic cylinder 474 are both conventional commercially available equipment with built-in power switches. Technical personnel in this field can make routine selections according to usage requirements. Their working principles are common knowledge known to technical personnel in this field and have been fully disclosed in the prior art, so they will not be elaborated in this article.

[0061] The implementation principle of the helical gear forging die with trimming function in the embodiment of the present application is as follows: when in use, the blank is first upset to become a bar of suitable size;

[0062] The bar is placed in the forming die cavity 201, and the punch 3 is driven by the press machine to move in the vertical direction to forge the bar;

[0063] After forging, there are two commonly used demoulding methods. One is to eject the blank from the bottom, and the other demoulding method is to first use a mechanical fixed die sleeve 2, and lift the die sleeve 2 away from the pier 1, and then use a pressure machine to drive the punch 3 downward to push the blank out through the punch 3. This embodiment adopts the second demoulding method;

[0064] By providing the first groove 203 with the blade 204, the upper scrap edge of the blank can be automatically cut off by the blade 204 during the forging or demoulding stage, without the need for subsequent secondary processing, thereby greatly improving the processing efficiency;

[0065] The convex ring 102 can squeeze the outer edge of the lower end of the blank to prevent the bottom end of the blank from generating waste edges;

[0066] In addition, if the blade 204 does not completely cut off the upper scrap edge of the blank, the hydraulic cylinder 474 uses the piston rod of the hydraulic cylinder 474 to push the knife seat 471 to move, so that the cutting tool 472 passes through the scrap edge, and starts the drive motor 46 to drive the driving gear 45 to rotate. Under the meshing action, when the driving gear 45 rotates, it will make a circular motion along the outer circumference of the outer gear ring 42, and drive the retaining frame 44 to rotate. Through the rotation of the retaining frame 44, the cutting tool 472 is driven to make a circular motion, which can cut off the excess scrap edge.

[0067] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0068] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0069] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A helical gear forging die with a trimming function, comprising a pier (1), a die sleeve (2) fixed on the pier (1), and a punch (3), wherein the inner space of the die sleeve (2) is a forming die cavity (201), and is characterized in that: A first groove (203) is provided at the top end of the inner side surface of the mold sleeve (2), and the bottom of the first groove (203) is an upwardly inclined slope for forming a cutting edge (204) at the end; And / or, a convex ring (102) is fixed on the top of the pier (1), and the inner wall of the convex ring (102) is an inclined surface inclined toward the outside, and a second groove (205) for accommodating the convex ring (102) is provided at the bottom end of the inner side surface of the mold sleeve (2).

2. The helical gear forging die with trimming function according to claim 1, characterized in that: The top end of the blade portion (204) is lower than the top surface of the mold sleeve (2).

3. The helical gear forging die with trimming function according to claim 1, characterized in that: The width of the top surface of the convex ring (102) is equal to the groove width of the second groove (205).

4. The helical gear forging die with trimming function according to claim 1, characterized in that: The mold sleeve (2) is provided with upper air-permeable micropores (202); And / or, lower ventilation micropores (101) are provided on the pier (1).

5. The helical gear forging die with trimming function according to claim 1, characterized in that: It also includes a trimming mechanism (4), and the trimming mechanism (4) is fixed to the top of the circumferential surface of the mold sleeve (2) and is used to cut off excess waste edges.

6. The helical gear forging die with trimming function according to claim 5, characterized in that: The trimming mechanism (4) comprises: A retaining frame (44), wherein the retaining frame (44) is rotatably mounted on the mold sleeve (2); A cutting mechanism (47) is fixed on the retaining frame (44) and is used for cutting off excess waste edges.

7. The helical gear forging die with trimming function according to claim 6, characterized in that: The cutting mechanism (47) comprises: A fixing plate (473), wherein the fixing plate (473) is fixed on the retaining frame (44); A knife seat (471), wherein the knife seat (471) is movably connected to the fixing plate (473); A cutting tool (472), wherein the cutting tool (472) is fixed on the tool holder (471), and the cutting tool (472) is a triangular tool; A hydraulic cylinder (474), wherein the hydraulic cylinder (474) is fixed on the fixing plate (473), and a piston rod of the hydraulic cylinder (474) passes through the fixing plate (473) and is fixedly connected to the knife seat (471).

8. The helical gear forging die with trimming function according to claim 7, characterized in that: A guide rod (475) penetrating the fixing plate (473) is fixed on the knife seat (471).

9. The helical gear forging die with trimming function according to claim 6, characterized in that: The trimming mechanism (4) further comprises: An annular guide rail (41), wherein the annular guide rail (41) is fixed on the circumferential surface of the mold sleeve (2), and guide grooves (411) are provided on the top surface and the bottom surface of the annular guide rail (41); An outer gear ring (42), wherein the outer gear ring (42) is supported and fixed on the annular guide rail (41) by means of a support column (43); A driving gear (45), the driving gear (45) being rotatably mounted in the retaining frame (44) and meshing with the outer gear ring (42); A driving motor (46), the driving motor (46) being fixed on the retaining frame (44) and used for driving the driving gear (45) to rotate; An adapter plate (48), wherein the adapter plate (48) is fixed to an end of the retaining frame (44); Guide wheels (49), the two guide wheels (49) are symmetrically distributed and rotatably arranged on the adapter plate (48), and the two guide wheels (49) are respectively embedded in corresponding guide slots (411).

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