Ring forge piece core expanding device

Abstract

The utility model discloses a ring forge piece core expanding device which comprises a working table, an expanding die is arranged at the top of the working table, a rotary driving mechanism is arranged in the working table, the output end of the rotary driving mechanism is connected with a hydraulic seat, and the hydraulic seat is connected with a multidirectional hydraulic cylinder arranged in the expanding die. The multidirectional hydraulic cylinder comprises a plurality of internally communicated cylinder bodies, and the interiors of the cylinder bodies are divided into rodless cavities and a plurality of rod cavities by a plurality of pistons; each piston is fixedly connected with a telescopic rod, and the telescopic rod extends out of the cylinder body to be connected with an expansion piece; a rodless cavity opening and a rod cavity opening are formed in the bottom of the rodless cavity and the bottom of the rod cavity respectively, an annular cavity channel and an L-shaped cavity channel are formed in the hydraulic base, the annular cavity channel is communicated with the rod cavity opening, and the L-shaped cavity channel is communicated with the rodless cavity opening. An adjusting oil channel A and an adjusting oil channel B which are communicated with the annular cavity channel and the L-shaped cavity channel are respectively formed in the side wall of the hydraulic seat; through the design, the technical problems that the existing equipment structure on the market cannot change the diameter of the ring forge piece and cannot increase the yield are solved.

Description

Technical Field

[0001] This utility model relates to the field of resistance furnace temperature control, specifically to a ring forging core expansion device. Background Technology

[0002] Large mechanical devices often include ring forgings, which are ring-shaped objects formed by applying external force to a metal billet and shaping it into a ring with appropriate compressive force through plastic deformation.

[0003] As the number of domestic ring rolling mills gradually increases, competitive pressure intensifies. Coupled with the high price of non-ferrous metal raw materials, the existing processing allowance for ring forgings is no longer competitive, and there are no ring forging products on the market that can be manufactured in different diameters.

[0004] To reduce costs, our company provides a ring forging core expansion device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the prior art and provide a ring forging core expansion device.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A ring forging core expansion device includes a worktable, an expansion mold on the top of the worktable, a rotary drive mechanism inside the worktable, an output end of the rotary drive mechanism connected to a hydraulic base, and a multi-directional hydraulic cylinder set inside the expansion mold.

[0008] The multi-directional hydraulic cylinder includes multiple internally connected cylinder bodies. The interior of each cylinder body is divided into rodless chambers and multiple rod chambers by multiple pistons. Each piston is fixedly connected to a telescopic rod, which extends out of the cylinder body and connects to an expansion plate. The bottom of the rodless chamber and the rod chamber are respectively provided with rodless chamber openings and rod chamber openings. The hydraulic seat has an annular cavity and an L-shaped cavity, with the annular cavity communicating with the rod chamber opening and the L-shaped cavity communicating with the rodless chamber opening. The sidewalls of the hydraulic seat are respectively provided with regulating oil passages A and B, which communicate with the annular cavity and the L-shaped cavity.

[0009] Preferably, the expansion mold is annular, and the expansion piece is arc-shaped for fitting the inner wall of the expansion mold.

[0010] Preferably, a buffer pad is provided at the end of the cylinder, and a limit ring is fixedly installed on the telescopic rod located between the piston and the buffer pad.

[0011] Preferably, the rotary drive mechanism includes a rotary table disposed at the bottom of the hydraulic base and teeth surrounding the side wall of the hydraulic base. The rotary table is rotatably connected to the hydraulic base via a linear bearing. A gear matching the teeth is also provided on one side of the hydraulic base. The gear is connected in sequence to a commutator and a rotary motor.

[0012] Preferably, the annular cavity of the hydraulic seat is connected to the rod-side cavity of the multi-directional hydraulic cylinder via a connecting pipe, and the L-shaped cavity of the hydraulic seat is connected to the rodless cavity of the multi-directional hydraulic cylinder via a connecting pipe.

[0013] Preferably, the piston is provided with a sealing ring.

[0014] Preferably, the workbench has a working window, and the hydraulic base is connected to the multi-directional hydraulic cylinder through a connecting pipe passing through the working window.

[0015] Preferably, the maximum diameter of the working window is smaller than the maximum diameter of the telescopic rod of the multi-directional hydraulic cylinder when it is extended.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By incorporating an expansion mold at the top of the worktable and a rotary drive mechanism inside the worktable, the output of which connects to a hydraulic base, which in turn connects to a multi-directional hydraulic cylinder within the expansion mold, this structure can not only expand and form ring forgings of different diameters but also accommodate ring forgings of different materials with varying diameters, and is suitable for ring forgings at different temperatures. This reduces machining allowances, machining time, and costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the rotary drive mechanism and hydraulic base structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal connection between the hydraulic base and the multi-directional hydraulic cylinder of this utility model;

[0021] Figure 4 This is a top sectional view of the hydraulic base of this utility model.

[0022] In the diagram: 1. Workbench; 2. Expanding mold; 3. Rotary drive mechanism; 31. Rotary table; 32. Tooth; 33. Gear; 34. Reversing device; 35. Rotary motor; 4. Hydraulic base; 41. Annular cavity; 42. L-shaped cavity; 43. Adjusting oil passage A; 44. Adjusting oil passage B; 5. Multi-directional hydraulic cylinder; 51. Cylinder body; 511. Rodless cavity; 5111. Rodless cavity opening; 512. Rod cavity; 5121. Rod cavity opening; 515. Buffer pad; 52. Piston; 521. Limiting ring; 53. Telescopic rod; 54. Expanding plate; 6. Connecting pipe; 522. Sealing ring. Detailed Implementation

[0023] A preferred embodiment of the present invention will now be described in conjunction with the accompanying drawings, providing a clear and complete description of the technical solution in this preferred embodiment.

[0024] A ring forging core expansion device includes a workbench 1, an expansion mold 2 on the top of the workbench 1, a rotary drive mechanism 3 inside the workbench 1, an output end of the rotary drive mechanism 3 connected to a hydraulic base 4, and a multi-directional hydraulic cylinder 5 disposed inside the expansion mold 2.

[0025] The multi-directional hydraulic cylinder 5 includes multiple internally connected cylinder bodies 51. The interior of each cylinder body 51 is divided into rodless chambers 511 and multiple rod chambers 512 by multiple pistons 52. Each piston 52 is fixedly connected to a telescopic rod 53, which extends to the outside of the cylinder body 51 and connects to an expansion plate 54. The bottom of the rodless chamber 511 and the rod chamber 512 are respectively provided with rodless chamber openings 5111 and rod chamber openings 5121. The hydraulic seat 4 has an annular cavity 41 and an L-shaped cavity 42. The annular cavity 41 communicates with the rod chamber opening 5121, and the L-shaped cavity 42 communicates with the rodless chamber opening 5111. The sidewalls of the hydraulic seat 4 are respectively provided with regulating oil passages A43 and B44, which communicate with the annular cavity 41 and the L-shaped cavity 42.

[0026] Specifically, in use, the rolled hot ring forging with insufficient dimensions is placed into the gap between the expanding plate 54 and the expansion die 2. The hydraulic system connects the hydraulic seat 4 to the regulating oil passage A43 and regulating oil passage B44. When oil enters the annular cavity 41 connected to the regulating oil passage A43 and exits the L-shaped cavity 42 connected to the regulating oil passage B44, the telescopic rod 53 in the multi-directional hydraulic cylinder 5 drives the expanding plate 54 to fit against the expansion die 2.

[0027] When oil exits from the annular cavity 41 and enters from the L-shaped cavity 42, the telescopic rod 53 inside the multi-directional hydraulic cylinder 5 drives the expanding plate 54 to retract. Then, the rotary drive mechanism 3 is activated to rotate the hydraulic seat 4 and the multi-directional hydraulic cylinder 5 to the left or right. Then, the expanding plate 54 extends again and fits against the expansion mold 2. The above actions are repeated until the outer wall of the ring forging with a larger diameter completely fits against the expansion mold 2 and the inner wall approaches a circle, thus completing the core expansion.

[0028] Specifically, the expansion mold 2 is annular, and the expansion piece 54 is arc-shaped for fitting the inner wall of the expansion mold 2.

[0029] Specifically, only a 5mm allowance is needed on one side between the expansion mold 2 and the expansion sheet 54. The expansion is transmitted to the hydraulic seat 4 through the hydraulic system to increase the inner and outer diameter of the ring forging to achieve the set size.

[0030] Specifically, a buffer pad 515 is provided at the inner end of the cylinder 51, and a limit ring 521 is fixedly installed on the telescopic rod 53 located between the piston 52 and the buffer pad 515.

[0031] Specifically, the buffer pad 515 prevents the telescopic rod 53 inside the multi-directional hydraulic cylinder 5 from impacting back and forth, which could damage the multi-directional hydraulic cylinder 5, and the limit ring 521 prevents the telescopic rod 53 from blocking the rod-side cavity 5121 when it moves, thus preventing difficulty in oil inlet and outlet.

[0032] Specifically, the rotary drive mechanism 3 includes a rotary table 31 disposed at the bottom of the hydraulic base 4 and teeth 32 surrounding the side wall of the hydraulic base 4. The rotary table 31 is rotatably connected to the hydraulic base 4 through a linear bearing. A gear 33 matching the teeth 32 is also provided on one side of the hydraulic base 4. The gear 33 is connected to the commutator 34 and the rotary motor 35 in sequence.

[0033] Specifically, the rotary motor 35 and the commutator 34 drive the gear 33 to rotate, which in turn drives the teeth 32 to rotate, thereby causing the hydraulic seat 4 to rotate alternately to the left or right, preventing the oil inlet pipe connected to the regulating oil passage A43 and regulating oil passage B44 from getting tangled.

[0034] Specifically, the annular cavity 41 of the hydraulic base 4 is connected to the rod-side cavity 5121 of the multi-directional hydraulic cylinder 5 via a connecting pipe 6, and the L-shaped cavity 42 of the hydraulic base 4 is connected to the rodless cavity 5111 of the multi-directional hydraulic cylinder 5 via a connecting pipe 6. The connecting pipe 6 has external threads at both ends, and the rod-side cavity 5121, the rodless cavity 5111, and the hydraulic base 4 have internal threads that match the external threads.

[0035] Specifically, the hydraulic base 4 and the multi-directional hydraulic cylinder 5 are connected by the connecting pipe 6, which is convenient for disassembly and assembly, and the length of the connecting pipe 6 can be adjusted according to the distance between the hydraulic base 4 and the multi-directional hydraulic cylinder 5.

[0036] Specifically, the piston 52 is provided with a sealing ring 522.

[0037] Specifically, the sealing ring 522 improves the sealing performance of the rodless chamber 511 and the rod chamber 512 inside the multi-directional hydraulic cylinder 5.

[0038] Specifically, the workbench 1 has a working window 11, and the hydraulic base 4 is connected to the multi-directional hydraulic cylinder 5 through a connecting pipe 6 passing through the working window 11. The maximum diameter of the working window 11 is smaller than the maximum diameter of the telescopic rod 53 of the multi-directional hydraulic cylinder 5 when it is extended.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mandrel expansion device for ring forgings, characterized in that, Includes a workbench (1), an expansion mold (2) on the top of the workbench (1), a rotary drive mechanism (3) inside the workbench (1), the output end of the rotary drive mechanism (3) is connected to a hydraulic base (4), and the hydraulic base (4) is connected to a multi-directional hydraulic cylinder (5) inside the expansion mold (2). The multi-directional hydraulic cylinder (5) includes multiple internally connected cylinder bodies (51). The cylinder body (51) is divided into a rodless chamber (511) and multiple rod chambers (512) by multiple pistons (52). Each piston (52) is fixedly connected to a telescopic rod (53), which extends to the outside of the cylinder body (51) and connects to the expansion plate (54). The bottom of the rodless chamber (511) and the rod chamber (512) are respectively provided with a rodless chamber port (5111) and a rod chamber port (5121). The hydraulic seat (4) is provided with an annular cavity (41) and an L-shaped cavity (42). The annular cavity (41) is connected to the rod chamber port (5121), and the L-shaped cavity (42) is connected to the rodless chamber port (5111). The hydraulic seat (4) has regulating oil passages A (43) and B (44) on its side wall, which are connected to the annular cavity (41) and the L-shaped cavity (42), respectively.

2. The ring forging core expansion device according to claim 1, characterized in that: The expansion mold (2) is annular, and the expansion piece (54) is arc-shaped for fitting the inner wall of the expansion mold (2).

3. The ring forging core expansion device according to claim 2, characterized in that: The cylinder (51) is also provided with a buffer pad (515) at the inner end, and a limit ring (521) is fixed on the telescopic rod (53) located between the piston (52) and the buffer pad (515).

4. The ring forging core expansion device according to claim 1, characterized in that: The rotary drive mechanism (3) includes a rotary table (31) set at the bottom of the hydraulic base (4) and teeth (32) surrounding the outer wall of the hydraulic base (4). The rotary table (31) is rotatably connected to the hydraulic base (4) through a linear bearing. A gear (33) matching the teeth (32) is also provided on one side of the hydraulic base (4). The gear (33) is connected to the commutator (34) and the rotary motor (35) in sequence.

5. The ring forging core expansion device according to claim 1, characterized in that: The annular cavity (41) of the hydraulic seat (4) is connected to the rod-side cavity (5121) of the multi-directional hydraulic cylinder (5) through a connecting pipe (6), and the L-shaped cavity (42) of the hydraulic seat (4) is connected to the rodless cavity (5111) of the multi-directional hydraulic cylinder (5) through a connecting pipe (6).

6. The ring forging core expansion device according to claim 1, characterized in that: The piston (52) is provided with a sealing ring (522).

7. The ring forging core expansion device according to claim 5, characterized in that: The workbench (1) has a working window (11), and the hydraulic base (4) is connected to the multi-directional hydraulic cylinder (5) through the connecting pipe (6) that passes through the working window (11).

8. The ring forging core expansion device according to claim 7, characterized in that: The maximum diameter of the working window (11) is smaller than the maximum diameter of the telescopic rod (53) of the multi-directional hydraulic cylinder (5) when it is extended.

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