Gear blank reaming die

Abstract

The utility model discloses a gear blank reaming die, and belongs to the technical field of forging and pressing equipment. The die comprises an upper die plate, a chambering head and a lower die base, the chambering head is arranged at the center of the upper die plate, the lower die base is slidably connected with a plurality of sliding columns, each sliding column is fixedly connected with the upper die plate, the lower die base is slidably connected with a plurality of clamping rods, each clamping rod faces the center of the lower die base, and the chambering head is fixedly connected with the lower die base. The center of the lower die base and the center of the upper die plate are located on the same vertical straight line, the lower die base is provided with a transmission mechanism which drives the clamping rods to slide through sliding of the sliding column, and the lower die base is provided with a reset piece used for enabling the sliding column to reset. Therefore, positioning and fixing of the gear are completed in the moving process of the upper die plate, the machining efficiency is greatly improved, and manpower consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of forging equipment, in particular to a gear blank hole enlarging die. Background Art

[0002] In the manufacturing process of existing gear blanks, forging is often used to open and expand the holes of the gear blanks. The specific method is to place the heated gear blank on a hole expansion die, and use a hydraulic press to apply pressure to the upper die of the die, so that the hole expansion head on the upper die expands the hole of the gear blank. Since the position of the hole has certain size requirements, it is usually necessary to clamp the gear blank to position it. The existing clamping process is relatively cumbersome and requires manpower, which has a certain impact on the processing efficiency. Therefore, a new hole expansion die is needed to solve this problem. Utility Model Content

[0003] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a gear blank hole enlarging die.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a gear blank reaming die, comprising an upper template, a reaming head and a lower die base, the reaming head is arranged at the center of the upper template, the lower die base is slidably connected with a plurality of sliding columns, each of the sliding columns is fixedly connected to the upper template, the lower die base is slidably connected with a plurality of clamping rods, each of the clamping rods faces the center of the lower die base, the center of the lower die base and the center of the upper template are on the same vertical line, the lower die base is provided with a transmission mechanism that drives the clamping rods to slide through the sliding of the sliding columns, and the lower die base is provided with a resetting member for resetting the sliding columns.

[0006] By adopting the above technical solution, when expanding the hole of the gear blank, the workpiece is placed at the center of the lower die seat, and then the upper template is pushed by the hydraulic press through the reaming head. During the movement of the upper template, the sliding column will be driven to slide on the lower die seat, so that the clamping rod will slide towards the center of the lower die seat under the drive of the transmission mechanism. During the sliding process, the gear blank will be pushed to slide, so that the center of the gear blank moves to the center of the lower die seat. By pushing and pressing the gear blank from all directions of the gear blank through a plurality of clamping rods, the gear blank can be fixed on the center of the lower die seat. At this time, the center of the gear blank and the reaming head are on the same vertical line. Before the reaming head reaches the gear blank, the clamping rod will first complete the clamping of the gear blank, and then the reaming head will reach the surface of the gear blank to complete the reaming of the gear blank. Then the output end of the hydraulic press is separated from the reaming head, and the upper template is reset under the drive of the reset member, so that the sliding column drives the clamping rod to reset through the transmission mechanism, and the transmission mechanism is used to enable the sliding column to drive the clamping rod to slide, thereby completing the positioning and fixation of the gear during the movement of the upper template, greatly improving the processing efficiency and reducing manpower consumption.

[0007] Preferably, the transmission mechanism includes a plurality of push plates and a plurality of cylinders, the push plates correspond one-to-one to the sliding columns, the air pipes correspond one-to-one to the clamping rods, the clamping rods are slidably connected to the lower die base through the cylinders, the cylinders are fixedly connected to the lower die base, the lower die base is provided with a plurality of air cavities, the air cavities correspond one-to-one to the push plates, each of the push plates is slidably connected in each of the air cavities, each of the push plates is fixedly connected to each of the sliding columns, each of the air cavities is interconnected through an airway, each of the cylinders is connected to the airway, and the airway is connected with a pressure relief valve and a one-way valve. When the air in the air chamber is pushed back and the air in the air chamber is pushed out of the air chamber, the air in the air chamber is pushed back into the air cylinder, and the air in the air chamber is pushed back into the air cylinder, so that the air in the air chamber is pushed back and the air in the air chamber is pushed back into the air cylinder.

[0008] Preferably, the reset member is a spring, and the spring is arranged between the push plate and the air cavity. When the push plate slides downward, the spring will deform and generate elastic force. When the output end of the hydraulic press is removed from the upper template, the elastic member will release the elastic force, so that the push plate is reset, thereby driving the sliding column and the upper template to reset.

[0009] Preferably, a clamping head is provided at one end of the clamping rod, and the clamping head is in the shape of a pancake. The utility model utilizes a pancake-shaped clamping head to enable the clamping rod to drive the clamping head to contact the workpiece, thereby releasing the cylindrical surface from the cylindrical surface, reducing the contact area, and facilitating the workpiece to achieve self-centering under the joint push of a plurality of clamping heads.

[0010] Preferably, each of the slide posts is sleeved with a limit ring, and the limit ring is threadedly connected to the slide post. The utility model uses the limit ring to limit the distance when the upper template slides downward. The limit ring and the slide post are threadedly connected. The position of the limit ring can be adjusted by rotating the limit ring, so that the upper template can adapt to workpieces of different thicknesses.

[0011] Preferably, the reaming head is slidably connected to the upper template, and an elastic member is provided between the reaming head and the upper template. The utility model utilizes the elastic member and the slidable reaming head, so that when the output end of the hydraulic press is separated from the reaming head, the reaming head can be reset before the upper template under the elastic force of the elastic member, so that the reaming head can be separated before the workpiece, avoiding the reaming head from being stuck in the hole of the workpiece and lifting the workpiece during the upward movement of the upper template, and facilitating the removal of the workpiece.

[0012] Preferably, the clamping rod is slidably connected to the cylinder via an adjusting sleeve, the adjusting sleeve is slidably connected to the clamping rod, and the adjusting sleeve is provided with a fixing mechanism for fixing the clamping rod. The utility model utilizes the sliding connection between the adjusting sleeve and the clamping rod to adjust the extension length of the clamping rod, thereby being able to adapt to a larger size range of gear blanks, and the clamping rod can be fixed at a certain extension length by utilizing the fixing mechanism.

[0013] Preferably, the fixing mechanism includes a screw, the screw is threadedly connected to the adjusting sleeve, and the clamping rod is provided with a plurality of fixing holes for the screw to be inserted. The utility model utilizes the threaded connection between the screw and the adjusting sleeve so that the screw can be inserted into or extended out of the fixing hole when rotating, and the clamping rod can be fixed at different extension lengths by inserting the screw into different fixing holes.

[0014] In summary, the beneficial effects of the utility model are:

[0015] 1. The transmission mechanism is used to enable the slide column to drive the clamping rod to slide, so that the positioning and fixation of the gear is completed during the movement of the upper template, which greatly improves the processing efficiency and reduces the consumption of manpower.

[0016] 2. The sliding connection between the adjusting sleeve and the clamping rod allows the extension length of the clamping rod to be adjusted, thereby being able to accommodate a larger size range of gear blanks, and the clamping rod can be fixed at a certain extension length using a fixing mechanism.

[0017] 3. By using elastic parts and a slidable reaming head, when the output end of the hydraulic press is separated from the reaming head, the reaming head can be reset before the upper template under the elastic force of the elastic part, so that the reaming head can be separated before the workpiece, avoiding the reaming head from being stuck in the hole of the workpiece and lifting the workpiece during the upward movement of the upper template, thereby facilitating the removal of the workpiece.

[0018] 4. The limit ring can be used to limit the distance the upper template slides downward. The limit ring and the slide column are threadedly connected. The position of the limit ring can be adjusted by rotating the limit ring, so that the upper template can adapt to workpieces of different thicknesses.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0020] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0021] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0023] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall cross-sectional structure;

[0026] Figure 2 It is a schematic diagram of the transmission mechanism structure;

[0027] Figure 3 It is a schematic diagram of the structure of the lower die base from a top view;

[0028] Figure 4 Schematic diagram of the gas path structure.

[0029] Explanation of main reference numerals: 1. upper template; 2. reaming head; 3. lower die base; 4. sliding column; 5. clamping rod; 6. fixing hole; 7. push plate; 8. cylinder; 9. air cavity; 10. air duct; 11. pressure relief valve; 12. one-way valve; 13. spring; 14. clamping head; 15. limiting ring; 16. elastic part; 17. adjusting sleeve; 18. screw. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0031] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0034] like Figure 1-4 As shown, a gear blank reaming die comprises an upper template 1, a reaming head 2 and a lower die base 3, the reaming head 2 is arranged at the center of the upper template 1, the lower die base 3 is slidably connected with a plurality of slide columns 4, each of which is fixedly connected to the upper template 1, the lower die base 3 is slidably connected with a plurality of clamping rods 5, each of which is oriented toward the center of the lower die base 3, the center of the lower die base 3 and the center of the upper template 1 are on the same vertical line, the lower die base 3 is provided with a transmission mechanism for driving the clamping rods 5 to slide through the sliding of the slide columns 4, and the lower die base 3 is provided with a resetting member for resetting the slide columns 4.

[0035] By adopting the above technical solution, when the gear blank is expanded, the workpiece is placed at the center of the lower die seat 3, and then the upper template 1 is pushed by the hydraulic press through the expansion head 2. During the movement of the upper template 1, the slide column 4 is driven to slide on the lower die seat 3, so that the clamping rod 5 is driven by the transmission mechanism to slide toward the center of the lower die seat 3. During the sliding process, the gear blank is pushed to slide, so that the center of the gear blank moves to the center of the lower die seat 3. The gear blank is pushed and pressed from all directions of the gear blank by a plurality of clamping rods 5, so that the gear blank can be fixed on the center of the lower die seat 3. At this time, the center of the gear blank and the reaming head 2 are on the same vertical line. Before the reaming head 2 reaches the gear blank, the clamping rod 5 will first complete the clamping of the gear blank. Then the reaming head 2 will reach the surface of the gear blank to complete the reaming of the gear blank. Then the output end of the hydraulic press is separated from the reaming head 2, and the upper template 1 is reset under the drive of the reset member, so that the slide column 4 drives the clamping rod 5 to reset through the transmission mechanism. The transmission mechanism is used to enable the slide column 4 to drive the clamping rod 5 to slide, thereby completing the positioning and fixation of the gear during the movement of the upper template 1, greatly improving the processing efficiency and reducing manpower consumption.

[0036] The transmission mechanism includes a plurality of push plates 7 and a plurality of cylinders 8. The push plates 7 correspond to the sliding columns 4 one by one, the air pipes correspond to the clamping rods 5 one by one, the clamping rods 5 are slidably connected to the lower die base 3 through the cylinders 8, the cylinders 8 are fixedly connected to the lower die base 3, the lower die base 3 is provided with a plurality of air cavities 9, the air cavities 9 correspond to the push plates 7 one by one, each push plate 7 is slidably connected in each air cavity 9, each push plate 7 is fixedly connected to each sliding column 4, each air cavity 9 is interconnected through an air passage 10, each cylinder 8 is connected to the air passage 10, and the air passage 10 is connected with a pressure relief valve 11 and a one-way valve 12. When the slide column 4 slides downward, the push plate 7 will be driven to slide, so that the push plate 7 squeezes the air in the air cavity 9 and transmits the air in the air cavity 9 to the cylinder 8 through the air channel 10, so that the clamping rod 5 slides driven by the air pressure, thereby realizing the transmission relationship between the slide column 4 and the clamping rod 5. When all the clamping rods 5 are in contact with the gear blank, since the gas can no longer enter the cylinder 8, the air pressure will rise and the pressure relief valve 11 will work to exhaust. In this way, the clamping rod 5 can automatically adapt to gear blanks of different diameters. When the push plate 7 slides upward driven by the slide rod, the air cavity 9 will recycle the gas into the cylinder 8 through the air channel 10, so that the clamping rod 5 is reset to release the clamping state of the workpiece. When the clamping rod 5 is reset, the cylinder 8 can no longer discharge the gas. Due to the increase in air pressure, the one-way valve 12 will be opened to allow the outside air to enter the air channel 10, thereby enabling the push plate 7 to be reset normally.

[0037] The reset member is a spring 13, which is arranged between the push plate 7 and the air cavity 9. When the push plate 7 slides downward, the spring 13 will be deformed and generate elastic force. When the output end of the hydraulic press is removed from the upper template 1, the elastic member 16 will release the elastic force, so that the push plate 7 is reset, thereby driving the slide column 4 and the upper template 1 to reset.

[0038] A clamping head 14 is provided at one end of the clamping rod 5, and the clamping head 14 is in a pancake shape. The pancake-shaped clamping head 14 can release the cylindrical surface when the clamping rod 5 drives the clamping head 14 to contact the workpiece, and can reduce the contact area, so that the workpiece can be self-centered under the joint push of several clamping heads 14.

[0039] Each slide post 4 is sleeved with a limit ring 15, which is threadedly connected to the slide post 4. The limit ring 15 can limit the distance of the upper template 1 when sliding downward. The limit ring 15 and the slide post 4 are threadedly connected. The position of the limit ring 15 can be adjusted by rotating the limit ring 15, so that the upper template 1 can adapt to workpieces of different thicknesses.

[0040] The reaming head 2 is slidably connected to the upper template 1, and an elastic member 16 is provided between the reaming head 2 and the upper template 1. By utilizing the elastic member 16 and the slidable reaming head 2, when the output end of the hydraulic press is separated from the reaming head 2, the reaming head 2 can be reset before the upper template 1 under the elastic force of the elastic member 16, so that the reaming head 2 can be separated before the workpiece, and the reaming head 2 is prevented from being stuck in the hole of the workpiece and lifting the workpiece during the upward movement of the upper template 1, so as to facilitate the removal of the workpiece.

[0041] The clamping rod 5 is slidably connected to the cylinder 8 through the adjusting sleeve 17, and the adjusting sleeve 17 is slidably connected to the clamping rod 5. The adjusting sleeve 17 is provided with a fixing mechanism for fixing the clamping rod 5. The sliding connection between the adjusting sleeve 17 and the clamping rod 5 allows the extension length of the clamping rod 5 to be adjusted, so as to adapt to a larger size range of gear blanks, and the clamping rod 5 can be fixed at a certain extension length by the fixing mechanism.

[0042] The fixing mechanism includes a screw 18, which is threadedly connected to the adjustment sleeve 17. The clamping rod 5 is provided with a plurality of fixing holes 6 for inserting the screws 18. The screw 18 can be inserted into or extended out of the fixing hole 6 when rotating by using the threaded connection between the screw 18 and the adjustment sleeve 17. By inserting the screw 18 into different fixing holes 6, the clamping rod 5 can be fixed at different extension lengths.

[0043] It should be noted that many specific details are set forth in the above description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

Claims

1. A gear blank reaming die, comprising an upper die plate (1), a reaming head (2) and a lower die base (3), characterized in that: The reaming head (2) is arranged at the center of the upper mold plate (1); the lower mold base (3) is slidably connected to a plurality of slide columns (4), each of which is fixedly connected to the upper mold plate (1); the lower mold base (3) is slidably connected to a plurality of clamping rods (5), each of which faces the center of the lower mold base (3); the center of the lower mold base (3) and the center of the upper mold plate (1) are on the same vertical line; the lower mold base (3) is provided with a transmission mechanism for driving the clamping rods (5) to slide by sliding the slide columns (4); and the lower mold base (3) is provided with a reset member for resetting the slide columns (4).

2. The gear blank expansion die according to claim 1, characterized in that: The transmission mechanism comprises a plurality of push plates (7) and a plurality of cylinders (8), wherein the push plates (7) correspond to the sliding columns (4) one by one, and the cylinders (8) correspond to the clamping rods (5) one by one, wherein the clamping rods (5) are slidably connected to the lower die base (3) through the cylinders (8), and the cylinders (8) are fixedly connected to the lower die base (3), and the lower die base (3) is provided with a plurality of air cavities (9), wherein the air cavities (9) correspond to the push plates (7) one by one, and each of the push plates (7) is slidably connected to each of the air cavities (9), and each of the push plates (7) is fixedly connected to each of the sliding columns (4), and each of the air cavities (9) is interconnected through an air passage (10), and each of the cylinders (8) is connected to the air passage (10), and the air passage (10) is connected to a pressure relief valve (11) and a one-way valve (12).

3. The gear blank expansion die according to claim 2, characterized in that: The reset element is a spring (13), and the spring (13) is arranged between the push plate (7) and the air cavity (9).

4. The gear blank expansion die according to claim 1, characterized in that: A clamping head (14) is provided at one end of the clamping rod (5), and the clamping head (14) is in a round cake shape.

5. The gear blank expansion die according to claim 1, characterized in that: Each of the sliding columns (4) is sleeved with a limiting ring (15), and the limiting ring (15) is threadedly connected to the sliding column (4).

6. The gear blank expansion die according to claim 1, characterized in that: The reaming head (2) is slidably connected to the upper template (1), and an elastic member (16) is provided between the reaming head (2) and the upper template (1).

7. The gear blank expansion die according to claim 2, characterized in that: The clamping rod (5) is slidably connected to the cylinder (8) via an adjusting sleeve (17), the adjusting sleeve (17) is slidably connected to the clamping rod (5), and the adjusting sleeve (17) is provided with a fixing mechanism for fixing the clamping rod (5).

8. The gear blank expansion die according to claim 7, characterized in that: The fixing mechanism comprises a screw (18), the screw (18) is threadedly connected to the adjustment sleeve (17), and the clamping rod (5) is provided with a plurality of fixing holes (6) for inserting the screw (18).

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