Inner star wheel preforming die

Abstract

The utility model relates to an inner star wheel preforming die, which belongs to the technical field of forming dies and comprises a base, two positioning rods are fixed at the top of the base, a top plate is slidably connected between the outer sides of the two positioning rods, a lower die component is mounted at the top of the base, and an upper die component is mounted at the bottom of the top plate. The lower die assembly comprises a mounting base fixedly mounted at the top of the base, a connecting plate fixed to the outer side of the mounting base, a lower die body abutting against the top of the mounting base, an annular first pressing groove formed in the outer side of the lower die body, and a first pressing ring abutting against the inner bottom wall of the first pressing groove. The annular cylinder is fixed to the outer side of the first pressing ring, the two inclined plane sliding holes are formed in the outer side of the annular cylinder, and the two communicating holes are formed in the outer side of the annular cylinder and communicate with the interiors of the two inclined plane sliding holes correspondingly. According to the inner star wheel preforming mold, the lower mold body of the preforming mold can be replaced more conveniently.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of forming dies, in particular to an inner star wheel pre-forming die. BACKGROUND

[0002] The inner star wheel is a main component of a universal joint and is widely used in automobiles, tractors and engineering machinery. The inner star wheel is a special-shaped part with symmetrical structure, and a through hole is arranged in the middle. In the existing processing technology, pre-upsetting and annealing and reverse extrusion are required. Although the overall precision is high, the forming cycle is long, resulting in low actual processing efficiency. How to improve the processing efficiency is a problem to be solved in the prior art.

[0003] According to the die for pre-forming an inner star wheel disclosed in Chinese Patent Publication No. CN217343414U, the cooperation between the upper die plate, the upper punch, the upper backing plate, the upper die ring and the upper concave die, the upper backing plate and the lower die plate, the lower punch, the ejector rod, the lower backing plate, the lower die ring and the lower concave die can directly stamp and form the workpiece, match the inner wall of the die, facilitate replacement and maintenance, be easy for workers to operate, and save the processing cost of the two processes of pre-upsetting and annealing and the die manufacturing cost.

[0004] However, the patent still has some deficiencies in actual application. Since the sizes of different inner star wheels differ, the lower die needs to be matched and replaced according to different models of inner star wheels. The patent uses a conventional bolt connection method, and multiple bolts are diagonally tightened to position the lower die, which makes the replacement process inconvenient. To this end, the application provides an inner star wheel pre-forming die to solve the above problems based on the reduction of the number of multiple bolts used and the improvement of the convenience of the disassembly process. CONTENT OF THE UTILITY MODEL

[0005] In view of the deficiencies of the prior art, the application provides an inner star wheel pre-forming die, which has the advantages of being more convenient to replace the lower die of the pre-forming die, and solves the problem that the existing inner star wheel pre-forming die is inconvenient to disassemble and replace the lower die in actual use.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: an inner star wheel pre-forming die, comprising a base, two positioning rods are fixed on the top of the base, a top plate is slidably connected between the outer sides of the two positioning rods, a lower die assembly is installed on the top of the base, and an upper die assembly is installed on the bottom of the top plate.

[0007] The lower die assembly comprises a mounting seat fixedly mounted on the top of the base, a connecting plate fixed to the outer side of the mounting seat, a lower die body abutting against the top of the mounting seat, a first pressing groove in the shape of a ring and formed in the outer side of the lower die body, a first pressing ring abutting against the inner bottom wall of the first pressing groove, an annular cylinder fixed to the outer side of the first pressing ring, two inclined slide holes formed in the outer side of the annular cylinder, two communication holes formed in the outer side of the annular cylinder and respectively communicating with the interiors of the two inclined slide holes, two inclined slide blocks fixed to the outer side of the mounting seat, a fixed plate fixed to the bottom of the annular cylinder, two first connecting pieces penetrating and locked between the top of the fixed plate and the connecting plate, and two handles fixed to the outer side of the annular cylinder.

[0008] The top of the lower die body is provided with a forming groove, the inner side of the forming groove movably has a first punch, the top end of the first punch is fixed with a second punch inserted and slidably connected to the inner side of the forming groove, and the outer side of the second punch is provided with a second pressing groove.

[0009] By adopting the above technical scheme, the lower die of the preforming die can be replaced more conveniently.

[0010] Further, the upper die assembly comprises a mounting cylinder fixedly mounted on the bottom of the top plate, a supporting plate fixed to the outer side of the mounting cylinder, a fixed cylinder sleeved on the bottom of the outer side of the mounting cylinder, a second pressing ring fixed to the bottom of the fixed cylinder, a butt joint plate fixed to the outer side of the fixed cylinder, and a plurality of second connecting pieces penetrating and locked between the top of the supporting plate and the butt joint plate.

[0011] By adopting the above technical scheme, the upper die can be disassembled and replaced.

[0012] Further, the top of the base and the mounting seat is provided with an ejection piece penetrating and slidably connected between the bottom of the base and the mounting seat and extendable into the forming groove.

[0013] By adopting the above technical scheme, the formed inner star wheel workpiece can be ejected.

[0014] Further, the ejection piece comprises an ejection rod and an ejection plate fixed to the top end of the ejection rod, and the interior of the lower die body is provided with a placing cavity in communication with the interior of the forming groove and for placing the ejection plate.

[0015] By adopting the above technical scheme, the workpiece in the forming groove can be ejected.

[0016] Further, the second punch penetrates the bottom of the mounting cylinder and is inserted into the inner side of the mounting cylinder, the second pressing groove is in the shape of a ring, the bottom of the second pressing groove is provided in an open manner, and the top of the second pressing ring abuts against the top of the second pressing groove.

[0017] By adopting the technical scheme, the second punch can be positioned and installed in the interior of the mounting cylinder, and the second punch can be limited through cooperation between the second pressing ring and the second pressing groove.

[0018] Further, the second connecting piece and the first connecting piece are both composed of a locking bolt and a locking nut.

[0019] By adopting the technical scheme, the second connecting piece can connect and position the support plate and the butt joint plate, and the first connecting piece can position the fixed plate and the connecting plate.

[0020] Further, the top of the first pressing groove is open, the inner side of the first pressing ring and the inner side wall of the first pressing groove are fitted, and the inner side of the annular cylinder and the outer side of the lower mold body are fitted.

[0021] By adopting the technical scheme, the position of the lower mold body can be effectively limited through cooperation between the annular cylinder and the first pressing ring.

[0022] Further, the bottom of the communication hole is open, the inclined surface sliding block is slidingly connected to the inner side of the corresponding inclined surface sliding hole, and the inclined surface sliding block can move to the inner side of the communication hole.

[0023] By adopting the technical scheme, the inclined surface sliding block can move from the outside to the inner side of the corresponding inclined surface sliding hole through the communication hole, so as to limit the position of the annular cylinder through cooperation between the inclined surface sliding block and the inclined surface sliding hole.

[0024] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0025] The inner star wheel preforming mold can more conveniently replace the lower mold of the preforming mold through cooperation between the lower mold assembly and the upper mold assembly on the top of the base, so that the staff does not need to diagonally tighten the bolts on the lower mold multiple times, but only needs to use a small number of bolts for basic positioning, which facilitates the staff to disassemble and replace the lower mold, thereby improving the convenience of the operation process, effectively improving the efficiency of the overall process, facilitating the adaptation of different sizes of inner star wheels, and effectively improving the practicality of the inner star wheel preforming mold. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the present application;

[0027] Figure 2 is a structure of the present application Figure 1 is a perspective view of the annular cylinder connecting structure of the present application;

[0028] Figure 3 is a structure of the present application Figure 1 is a front view schematic view of the present application.

[0029] In the figure: 1, base; 201, positioning rod; 202, top plate; 300, lower mold assembly; 301, mounting seat; 302, connecting plate; 303, lower mold body; 304, first pressing groove; 305, first pressing ring; 306, annular cylinder; 307, inclined sliding hole; 308, communication hole; 309, inclined sliding block; 310, fixing plate; 311, first connecting piece; 312, handle; 400, upper mold assembly; 401, mounting cylinder; 402, support plate; 403, fixing cylinder; 404, second pressing ring; 405, butt joint plate; 406, second connecting piece; 5, ejector; 601, forming groove; 602, first punch; 603, second punch; 604, second pressing groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figures 1 to 3 The present application provides a technical solution: an inner star wheel preforming mold, comprising a base 1, the top of the base 1 is fixed with two positioning rods 201, the outer sides of the two positioning rods 201 are slidingly connected with a top plate 202, the top of the base 1 is installed with a lower mold assembly 300, and the bottom of the top plate 202 is installed with an upper mold assembly 400; through the cooperation between the lower mold assembly 300 and the upper mold assembly 400 at the top of the base 1, the lower mold of the preforming mold can be replaced more conveniently, so that the staff does not need to diagonally tighten the bolts on the lower mold for multiple times, but only needs to use a small amount of bolts for basic positioning, which is convenient for the staff to disassemble and replace, thereby improving the convenience of the operation process, effectively improving the efficiency of the overall process, facilitating the adaptation to the use of inner star wheels of different sizes, and effectively improving the practicality of the inner star wheel preforming mold.

[0032] The lower mold assembly 300 in the embodiment is a structure for positioning and installing the lower mold.

[0033] As Figure 1 , Figure 2 and Figure 3As shown, the lower mold assembly 300 includes a mounting base 301 fixedly mounted on the top of the base 1, a connecting plate 302 fixed to the outside of the mounting base 301, a lower mold body 303 abutting against the top of the mounting base 301, a first pressing groove 304 formed by opening on the outside of the lower mold body 303 and forming an annular shape, a first pressing ring 305 abutting against the inner bottom wall of the first pressing groove 304, an annular cylinder 306 fixed to the outside of the first pressing ring 305, two inclined sliding holes 307 opened on the outside of the annular cylinder 306, two connecting holes 308 opened on the outside of the annular cylinder 306 and respectively communicating with the inside of the two inclined sliding holes 307, two inclined sliders 309 fixed to the outside of the mounting base 301, a fixing plate 310 fixed to the bottom of the annular cylinder 306, two first connecting pieces 311 passing through and locked between the fixing plate 310 and the top of the connecting plate 302, and two handles 312 fixed to the outside of the annular cylinder 306.

[0034] It should be noted that an ejector 5, which extends into the forming groove 601, is slidably connected between the bottom of the base 1 and the mounting base 301. The ejector 5 includes an ejector rod and an ejector plate fixed to the top of the ejector rod. The lower mold body 303 has a placement cavity that communicates with the inside of the forming groove 601 and is used to place the ejector plate. Specifically, the bottom end of the ejector 5 is connected to a linear drive device such as a hydraulic cylinder. The top of the top plate 202 is also connected to a linear drive device such as a hydraulic mechanism, so that the corresponding hydraulic mechanism can push the ejector 5 to move, thereby ejecting the workpiece in the forming groove 601. The hydraulic mechanism can drive the top plate 202 to move, and then perform pre-forming processing on the inner star wheel through the cooperation between the first punch 602 and the second punch 603 and the forming groove 601. The hydraulic mechanism needs to be connected to the power supply and PLC controller during operation. The electrical connection technology is a publicly available technology, so it will not be described in detail.

[0035] In addition, the top of the first pressing groove 304 is open, the inner side of the first pressing ring 305 is in contact with the inner wall of the first pressing groove 304, and the inner side of the annular cylinder 306 is in contact with the outer side of the lower mold body 303, so that the limiting cooperation between the annular cylinder 306 and the first pressing ring 305 can effectively restrict the position of the lower mold body 303.

[0036] Meanwhile, the bottom of the connecting hole 308 is open, and the connecting hole 308 is located on one side of the higher point of the corresponding inclined sliding hole 307. The inclined slider 309 is slidably connected to the inner side of the corresponding inclined sliding hole 307. The inclined slider 309 can move to the inner side of the connecting hole 308, thereby allowing the inclined slider 309 to move from the outside to the inner side of the corresponding inclined sliding hole 307 through the connecting hole 308. Thus, the position of the annular cylinder 306 is restricted through the cooperation between the inclined slider 307 and the inclined sliding hole 307.

[0037] The upper die assembly 400 in the embodiment is a structure for positioning and installing the first punch 602 and the second punch 603.

[0038] As shown in Figure 1 and Figure 3 , the top of the lower die body 303 is provided with a forming groove 601, the inner side of the forming groove 601 movably has the first punch 602, the top end of the first punch 602 is fixed with the second punch 603 which is inserted and slidingly connected to the inner side of the forming groove 601, and the outer side of the second punch 603 is provided with a second pressing groove 604.

[0039] The upper die assembly 400 includes a mounting cylinder 401 fixedly installed at the bottom of the top plate 202, a support plate 402 fixed to the outer side of the mounting cylinder 401, a fixed cylinder 403 sleeved at the bottom of the outer side of the mounting cylinder 401, a second pressing ring 404 fixed to the bottom of the fixed cylinder 403, a butt joint plate 405 fixed to the outer side of the fixed cylinder 403, and a plurality of second connecting pieces 406 penetrating and locked between the top portions of the support plate 402 and the butt joint plate 405.

[0040] It should be noted that the second punch 603 penetrates the bottom of the mounting cylinder 401 and is inserted into the inner side of the mounting cylinder 401, so that the second punch 603 can be positioned and installed inside the mounting cylinder 401, the second pressing groove 604 is annular, and the bottom of the second pressing groove 604 is provided with an opening, the top of the second pressing ring 404 and the top of the second pressing groove 604 abut, at this time, the top end of the second punch 603 and the inner top wall of the mounting cylinder 401 abut, and the second punch 603 can be limited by the cooperation between the second pressing ring 404 and the second pressing groove 604.

[0041] In addition, the second connecting piece 406 and the first connecting piece 311 are both composed of a locking bolt and a locking nut, so that the second connecting piece 406 can connect and position the support plate 402 and the butt joint plate 405, and the first connecting piece 311 can position the fixed plate 310 and the connecting plate 302.

[0042] The working principle of the above embodiment is as follows:

[0043] (1) When preforming the inner star wheel, according to the actual required outer diameter size, the corresponding lower mold body 303 is placed on the top of the mounting seat 301, the annular barrel 306 is moved to the outside of the lower mold body 303, and the inclined slide block 309 enters the inside of the inclined slide hole 307 through the corresponding communication hole 308, the annular barrel 306 is rotated through the handle 312, the inclined slide block 309 moves in the inside of the corresponding inclined slide hole 307, under the action of the inclined inner wall, the annular barrel 306 gradually moves downward, and the first pressing ring 305 is pressed and limited to the inner bottom wall of the first pressing groove 304, and two first connecting pieces 311 are penetrated and locked, so that the installation work of the lower mold body 303 is completed. Compared with the conventional bolt connection mode, this mode does not need to be tightened for a long time, and can greatly reduce the use of bolts, and is convenient for the operator to operate.

[0044] (2) The rough blank workpiece is placed in the inside of the forming groove 601, the top plate 202 is pushed to move to the side close to the base 1 through the hydraulic mechanism, the first punch 602 punches the middle part of the rough blank, so that the inner ring is formed, and the bottom of the second punch 603 punches the top of the rough blank, so that the outer diameter of the rough blank can match the inside of the forming groove 601, and the inner diameter matches the outer diameter of the first punch 602, the preforming of the inner star wheel is completed, the first punch 602 is moved out of the inside of the forming groove 601 by controlling the hydraulic mechanism, the ejector 5 is moved, and the rough blank in the inside of the forming groove 601 is ejected through the top end of the ejector 5, so that it can be collected.

[0045] Compared with the prior art, the inner star wheel preforming die can more conveniently replace the lower mold of the preforming die through the cooperation between the lower mold assembly 300 and the upper mold assembly 400 on the top of the base 1, so that the operator only needs to use a small amount of bolts for basic positioning, and the operator can conveniently disassemble and replace the lower mold, thereby improving the convenience of the operation process, effectively improving the efficiency of the whole process, facilitating the adaptation of different sizes of inner star wheels, effectively improving the practicality of the inner star wheel preforming die, and solving the disadvantage that the existing inner star wheel preforming die is inconvenient to disassemble and replace the lower mold in the actual use process.

Claims

1. An inner star wheel pre-forming mold, comprising a base (1), characterized in that: The base (1) has two positioning rods (201) fixed on its top, and a top plate (202) is slidably connected between the outer sides of the two positioning rods (201). A lower mold assembly (300) is installed on the top of the base (1), and an upper mold assembly (400) is installed on the bottom of the top plate (202). The lower mold assembly (300) includes a mounting base (301) fixedly mounted on the top of the base (1), a connecting plate (302) fixed to the outside of the mounting base (301), a lower mold body (303) abutting against the top of the mounting base (301), a first pressing groove (304) formed annularly on the outside of the lower mold body (303), a first pressing ring (305) abutting against the inner bottom wall of the first pressing groove (304), an annular cylinder (306) fixed to the outside of the first pressing ring (305), and a connecting plate (302) formed in the annular cylinder (303). 6) Two inclined sliding holes (307) on the outer side, two connecting holes (308) opened on the outer side of the annular cylinder (306) and respectively connected to the interior of the two inclined sliding holes (307), two inclined sliders (309) fixed on the outer side of the mounting base (301), a fixing plate (310) fixed on the bottom of the annular cylinder (306), two first connecting pieces (311) passing through and locked between the fixing plate (310) and the top of the connecting plate (302), and two handles (312) fixed on the outer side of the annular cylinder (306); The top of the lower mold body (303) is provided with a forming groove (601), and a first punch (602) is movable inside the forming groove (601). The top of the first punch (602) is fixed with a second punch (603) that is inserted into and slidably connected to the inside of the forming groove (601). A second pressing groove (604) is provided on the outside of the second punch (603).

2. The inner star wheel pre-forming mold according to claim 1, characterized in that: The upper mold assembly (400) includes a mounting cylinder (401) fixedly installed at the bottom of the top plate (202), a support plate (402) fixed to the outside of the mounting cylinder (401), a fixing cylinder (403) sleeved on the bottom of the outside of the mounting cylinder (401), a second pressing ring (404) fixed to the bottom of the fixing cylinder (403), a docking plate (405) fixed to the outside of the fixing cylinder (403), and a plurality of second connectors (406) passing through and locking between the top of the support plate (402) and the docking plate (405).

3. The inner star wheel pre-forming mold according to claim 1, characterized in that: An ejector (5) that can extend into the molding groove (601) is inserted and slidably connected between the bottom of the base (1) and the mounting base (301).

4. The inner star wheel pre-forming mold according to claim 3, characterized in that: The ejector (5) includes an ejector rod and an ejector plate fixed to the top of the ejector rod. The lower mold body (303) has a placement cavity that communicates with the inside of the forming groove (601) and is used to place the ejector plate.

5. The inner star wheel pre-forming mold according to claim 2, characterized in that: The second punch (603) passes through the bottom of the mounting cylinder (401) and is inserted into the inner side of the mounting cylinder (401). The second pressing groove (604) is annular and the bottom of the second pressing groove (604) is open. The top of the second pressing ring (404) and the top of the second pressing groove (604) abut against each other.

6. The inner star wheel pre-forming mold according to claim 2, characterized in that: Both the second connector (406) and the first connector (311) are composed of locking bolts and locking nuts.

7. The inner star wheel pre-forming mold according to claim 1, characterized in that: The top of the first pressing groove (304) is open, the inner side of the first pressing ring (305) is in contact with the inner wall of the first pressing groove (304), and the inner side of the annular cylinder (306) is in contact with the outer side of the lower mold body (303).

8. The inner star wheel pre-forming mold according to claim 1, characterized in that: The bottom of the connecting hole (308) is open, and the inclined slider (309) is slidably connected to the inner side of the corresponding inclined sliding hole (307). The inclined slider (309) can move to the inner side of the connecting hole (308).

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