Caterpillar track roller rim forming die

Abstract

The utility model discloses a caterpillar track supporting wheel rim forming die which comprises an upper die base and a lower die base, a forming lower die is fixedly arranged on the lower die base, and a forming upper die is installed on the upper die base. A lower forming channel with an opening in the upper end is formed in the lower forming die, an inner pipe forming column located in the center of the lower forming channel is fixedly arranged on the lower forming die, an annular forming cavity is formed between the side wall of the lower forming channel and the inner pipe forming column, and an end face forming module is installed in the annular forming cavity in a lifting sliding mode. A jacking driver is arranged between the end face forming module and the lower forming die. A containing groove used for containing the annular plate blank is formed in the position, located at the upper end opening of the lower forming channel, of the upper forming die, an inner pipe forming channel corresponding to the inner pipe forming column is formed in the upper forming die, and the upper forming die is used for pressing the annular plate blank into the annular forming cavity. According to the utility model, a tubular structure can be formed at the inner hole of the rim, and the forming effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of forging dies, in particular to a track roller rim forming die. Background Art

[0002] The track roller is a component used to bear the weight of a tracked vehicle. There are many types of track rollers depending on the track structure. The track rollers used for integral tracks or rubber tracks are double-row rim type. The structure of the track roller mainly includes an axle and two rims symmetrically arranged on the axle. The track roller was first produced by integral casting. The cast blank was machined through multiple processes and the rotation performance was adjusted to form a finished product. However, due to the overall low efficiency, high energy consumption and high cost of this production process, it has been eliminated. At present, the track roller is mainly produced by forging. Specifically, a ring-shaped plate with a hole in the middle is placed on the lower die, and a rim with a hole in the middle is formed by pressing down with the upper die. The formed rim is mounted on the axle and then welded to obtain a finished track roller. Track rollers with this structure, such as Figure 5 As shown in the figure, the wheel rim and the wheel axle are mainly fixedly connected by an annular weld. The connection strength between the wheel rim and the wheel axle is low, resulting in poor supporting capacity of the track roller. It is necessary to weld radial ribs to enhance the supporting capacity. However, this will increase the processing steps and manufacturing costs, and the existence of ribs will make the later maintenance of the track roller very inconvenient. For this reason, relevant technicians have designed a new wheel rim structure, that is, a tubular structure is integrally formed at the inner hole of the wheel rim, such as Figure 6 As shown, after the wheel rim and the wheel axle are welded, the wheel rim and the wheel axle can achieve stronger connection strength through the pipe-shaft cooperation, reduce the welding of the rib plate, and facilitate later maintenance. However, this wheel rim structure needs to provide a matching mold for molding processing, and the invention is born from this. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a track roller rim forming die which can form a tubular structure at the inner hole of the rim and has a good forming effect.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a track roller rim forming mold, comprising an upper mold base and a lower mold base, the lower mold base is fixedly provided with a forming lower mold, and the upper mold base is installed with a forming upper mold; the forming lower mold is provided with a lower forming channel with an upper end opening, the forming lower mold is fixedly provided with an inner tube forming column located at the center of the lower forming channel, an annular forming cavity is formed between the side wall of the lower forming channel and the inner tube forming column, an end face forming module is installed in the annular forming cavity for lifting and sliding, and a jacking drive is provided between the end face forming module and the forming lower mold; the forming upper mold is provided with a placement groove for placing an annular slab at the upper port of the lower forming channel, the forming upper mold is provided with an inner tube forming channel corresponding to the inner tube forming column, and the forming upper mold is used to press the annular slab down into the annular forming cavity.

[0005] As a preferred technical solution, an elastic connecting device is provided between the forming upper die and the upper die base, and an inner tube forging cylinder is fixedly provided on the forming upper die, and the inner tube forging cylinder is used to forge the inner tube between the inner tube forming channel and the inner tube forming column.

[0006] As a preferred technical solution, the elastic connecting device includes a plurality of connecting rods fixedly arranged on the upper mold base, and connecting guide holes corresponding to each of the connecting rods are respectively opened on the forming upper mold, and a demolding connecting protrusion is fixedly provided on the end of the connecting rod passing downward through the connecting guide hole, and a connecting spring is mounted on the connecting rod between the forming upper mold and the upper mold base.

[0007] As a preferred technical solution, the end face molding module is arranged at the same height as the placement groove when it is at its highest.

[0008] As a preferred technical solution, an inner tube forming guide cone surface is provided on the upper section of the inner tube forming column.

[0009] As a preferred technical solution, an outer edge forming guide cone surface is provided at the upper port of the lower forming channel.

[0010] As a preferred technical solution, the lifting drive includes a lifting cylinder installed on the lower die base.

[0011] Due to the adoption of the above technical scheme, the track roller rim forming mold comprises an upper mold base and a lower mold base, the lower mold base is fixedly provided with a forming lower mold, and the upper mold base is installed with a forming upper mold; the forming lower mold is provided with a lower forming channel with an upper end opening, the forming lower mold is fixedly provided with an inner tube forming column located at the center of the lower forming channel, an annular forming cavity is formed between the side wall of the lower forming channel and the inner tube forming column, an end face forming module is installed in the annular forming cavity for lifting and sliding, and a lifting drive is provided between the end face forming module and the forming lower mold; the forming upper mold is provided with a placement groove for placing an annular slab at the upper port of the lower forming channel, the forming upper mold is provided with an inner tube forming channel corresponding to the inner tube forming column, and the forming upper mold is used to press the annular slab down into the annular forming cavity. The utility model places the annular plate blank on the placement groove, and the upper forming die presses the annular plate blank downward, and first forms a preliminary compression of the annular plate blank with the end face forming module; under the continuous downward pressure of the upper forming die, the end face forming module is pressed downward, and the annular plate blank gradually enters the annular forming cavity, and its inner edge and outer edge are respectively bent upward to form an inner tube and an outer edge, until the end face forming module is lowered to the lowest, a forming cavity is formed between the upper forming die and the end face forming module, the inner tube forming column, and the lower forming channel, and the annular plate blank is formed into a wheel rim with a tubular structure such as an inner tube. The utility model can be formed in one time, and the forming effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 yes Figure 1 A state diagram of the upper forming die being pressed down to clamp the annular slab with the end face forming module;

[0015] Figure 3 yes Figure 2 The state diagram of the inner edge and outer edge of the annular slab being completely deformed after the upper forming die continues to press downward;

[0016] Figure 4 yes Figure 3 The state diagram of the final annular slab being pressed down to form the wheel rim;

[0017] Figure 5 It is a structural schematic diagram of the existing supporting wheel;

[0018] Figure 6 It is a structural schematic diagram of a new type of supporting wheel.

[0019] In the figure: 1-upper die seat; 2-lower die seat; 3-forming upper die; 31-inner tube forming channel; 4-forming lower die; 41-lower forming channel; 411-outer edge forming guide cone; 42-inner tube forming column; 421-inner tube forming guide cone; 43-end face forming module; 44-lifting drive; 441-lifting cylinder; 442-lifting guide hole; 443-lifting guide rod; 45-placing groove; 5-elastic connecting device; 51-connecting rod; 52-connecting guide hole; 53-mold-lifting connecting protrusion; 54-connecting spring; 6-inner tube forging cylinder; 8-annular slab; 9-supporting wheel; 91-wheel axle; 92-wheel rim; 93-rib plate. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0021] like Figures 1 to 4 As shown together, the track roller rim forming mold includes an upper mold base 1 and a lower mold base 2, the lower mold base 2 is fixedly provided with a forming lower mold 4, and the upper mold base 1 is installed with a forming upper mold 3. Conventionally, the upper mold base 1 and the lower mold base 2 are installed on relevant forming equipment, such as a press; and conventionally, the lower mold base 2 is fixedly installed on the press, and the upper mold base 1 is fixedly installed on the driving end of the press cylinder, and the press cylinder is driven to achieve mold closing and mold opening. This is easy to understand by those skilled in the art in combination with the known technology in the art, and will not be repeated here, and the press and the press cylinder are not shown in the figure.

[0022] The lower molding die 4 is provided with a lower molding channel 41 with an upper opening, and an inner tube molding column 42 is fixedly provided on the lower molding die 4 at the center of the lower molding channel 41, and an annular molding cavity is formed between the side wall of the lower molding channel 41 and the inner tube molding column 42. An end surface molding module 43 is installed in the annular molding cavity in a lifting and sliding manner, and the end surface molding module 43 is used to form a molding cavity on the lower molding die 4 with the side wall of the lower molding channel 41 and the inner tube molding column 42, so the end surface molding module 43 is an annular structure adapted to the annular molding cavity, and its upper end surface is designed accordingly according to the end surface shape of the wheel rim 92.

[0023] A lifting driver 44 is provided between the end face molding module 43 and the molding lower die 4, so as to lift the end face molding module 43 after the rim 92 is formed, so as to eject the rim 92 out of the annular molding cavity and realize material discharge. The lifting driver 44 in this embodiment includes a lifting cylinder 441 installed on the lower die seat 2. Specifically, a lifting guide hole 442 is provided through the bottom of the groove of the lower molding channel 41 on the molding lower die 4, and a lifting guide rod 443 is fixedly provided on the driving end of the lifting cylinder 441, which passes through the lifting guide hole 442 and is fixedly connected to the end face molding module 43.

[0024] The upper mold 3 is provided with a placement groove 45 for placing the annular plate blank 8 at the upper end of the lower molding channel 41. Of course, the placement groove 45 is a circular groove that matches the shape of the annular plate blank 8. The placement groove 45 is used to position the annular plate blank 8 so as to facilitate the subsequent rapid mold closing molding. The upper mold 3 is provided with an inner tube molding channel 31 corresponding to the inner tube molding column 42. The upper mold 3 is used to press the annular plate blank 8 down into the annular molding cavity.

[0025] During operation, the annular slab 8 is placed on the placement groove 45, and the upper forming die 3 presses the annular slab 8 downward. The upper forming die 3 first forms a preliminary compression of the annular slab 8 with the end face forming module 43. As the upper forming die 3 continues to press downward, it presses the end face forming module 43 downward, and the annular slab 8 gradually enters the annular forming cavity, and its inner edge and outer edge are respectively bent upward to form an inner tube and an outer edge, until the end face forming module 43 is lowered to the lowest point, and a forming cavity is formed between the upper forming die 3 and the end face forming module 43, the inner tube forming column 42, and the lower forming channel 41, and the annular slab 8 is formed into a rim 92 with a tubular structure of an inner tube. After forming, the upper forming die 3 is raised, and the lifting drive 44 drives the end face forming module 43 to rise, and the rim 92 is ejected out of the annular forming cavity, the formed rim 92 is taken away, and a new annular slab 8 is placed on the placement groove 45, and the above-mentioned forming process is repeated.

[0026] Accordingly, the lifting driver 44 simultaneously forms a force-applying structure for clamping the annular plate blank 8 when the upper forming die 3 is pressed downward. The lifting and clamping cooperation functions can be realized by an elastic structure at the same time, or by a cylinder-coordinated valve. Of course, the force applied by the lifting driver 44 is significantly smaller than the downward pressure of the press cylinder, so that the upper forming die 3 can be pressed downward while ensuring clamping. The setting method of the lifting driver 44 is a common technical means in the mold, which is easily known to those skilled in the art and will not be described in detail here.

[0027] Preferably, an inner tube forming guide cone 421 is provided on the upper section of the inner tube forming column 42 to achieve gradual bending of the inner edge of the annular slab 8 to avoid forming defects caused by bending too quickly. Similarly, an outer edge forming guide cone 411 is provided at the upper end of the lower forming channel 41.

[0028] Preferably, the end face forming module 43 is arranged at the same height as the placement groove 45 when it is at its highest, so as to cooperate with the placement groove 45 to support the initial annular slab 8 and quickly clamp the annular slab 8 when the forming upper mold 3 is pressed down.

[0029] Preferably, an elastic connecting device 5 is provided between the forming upper die 3 and the upper die base 1 , and an inner tube forging cylinder 6 is fixedly provided on the forming upper die 3 , and the inner tube forging cylinder 6 is used to forge the inner tube between the inner tube forming channel 31 and the inner tube forming column 42 .

[0030] The forming upper die 3 is lifted and lowered together with the upper die holder 1 through the elastic connection device 5. During the pressing process of the forming upper die 3, especially during the continuous lowering process of the forming upper die 3 and the end face forming module 43 clamping the annular slab 8, the forming upper die 3 and the upper die holder 1 rely on the elastic force of the elastic connection device 5 to maintain the clamping effect of the forming upper die 3 and the end face forming module 43 on the annular slab 8, so as to avoid the misalignment of the annular slab 8 and cause the material to be scrapped. At this time, the elastic force of the elastic connection device 5 is always greater than the lifting force of the lifting drive 44, so that the forming upper die 3 can be continuously pressed down together with the upper die holder 1 before it is completely compressed.

[0031] After the end surface forming module 43 reaches the bottom, the upper die seat 1 continues to descend. The elastic connection device 5 continues to be compressed, and the inner tube forging cylinder 6 forges the inner tube portion formed between the inner tube forming channel 31 and the inner tube forming column 42 to make its structure tight, thereby reducing forming defects such as tissue tearing during the bending of the inner edge into a tubular structure. When the upper die seat 1 is driven to rise, the inner tube forging cylinder 6 first withdraws upward, the elastic connection device 5 re-extends, and finally drives the forming upper die 3 to be demolded.

[0032] The elastic connection device 5 of this embodiment includes a plurality of connection rods 51 fixedly arranged on the upper die seat 1, and connection guide holes 52 are respectively opened on the upper die 3 corresponding to each of the connection rods 51, and a demoulding connection protrusion 53 is fixedly arranged on the end of the connection rod 51 passing downward through the connection guide hole 52, and a connection spring 54 is sleeved on the connection rod 51 between the upper die 3 and the upper die seat 1. Under normal conditions, the upper die 3 and the upper die seat 1 are relatively fixed by the rigid restriction of the demoulding connection protrusion 53 and the elastic force of the connection spring 54; this structure easily allows the connection spring 54 to be pre-compressed, so that during the pressing process, the connection spring 54 can quickly form a strong spring force to clamp the annular plate blank 8 with the end face forming module 43. During the pressing process, when the connection spring 54 is compressed, the demoulding connection protrusion 53 leaves the connection guide hole 52. When demolding, the connection spring 54 is re-extended, and the demolding connection protrusion 53 is again pressed against the connection guide hole 52, driving the molding upper mold 3 to rise along with the upper mold base 1.

[0033] This embodiment relies on the cooperation of the inner tube forming column 42 and the liftable end face forming module 43 arranged in the lower forming channel 41, so that the lower forming die 4 can firstly clamp the annular plate blank 8 during the pressing process, and after continuous pressing, the inner edge and outer edge of the annular plate blank 8 are gradually bent and formed into the inner tube and outer edge. This embodiment further arranges the inner tube forging cylinder 6 on the upper die seat 1 and the upper forming die 3 and the upper die seat 1 are elastically connected and cooperated, so that at the end of the mold closing, the inner tube part formed by the inner edge bending can be forged tightly to ensure the structural strength of the inner tube. Therefore, this embodiment can form the rim 92 in one step, and can form a tightly structured inner tube tubular part, with good forming effect and high efficiency.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. The track roller rim forming die comprises an upper die base and a lower die base, and is characterized in that: A molding lower mold is fixedly provided on the lower mold base, and a molding upper mold is installed on the upper mold base; a lower molding channel with an upper end opening is provided on the molding lower mold, and an inner tube molding column located at the center of the lower molding channel is fixedly provided on the molding lower mold, and an annular molding cavity is formed between the side wall of the lower molding channel and the inner tube molding column, and an end face molding module is installed in the annular molding cavity for lifting and sliding, and a lifting drive is provided between the end face molding module and the molding lower mold; a placement groove for placing an annular slab is provided on the molding upper mold at the upper port of the lower molding channel, and an inner tube molding channel corresponding to the inner tube molding column is provided on the molding upper mold, and the molding upper mold is used to press the annular slab down into the annular molding cavity.

2. The track roller rim forming mold according to claim 1, characterized in that: An elastic connection device is provided between the upper forming die and the upper die seat, and an inner tube forging cylinder is fixedly provided on the upper forming die. The inner tube forging cylinder is used to forge the inner tube between the inner tube forming channel and the inner tube forming column.

3. The track roller rim forming mold according to claim 2, characterized in that: The elastic connecting device includes a plurality of connecting rods fixedly arranged on the upper die seat, and connecting guide holes are respectively opened on the forming upper die corresponding to each of the connecting rods. A demoulding connecting protrusion is fixedly provided on the end of the connecting rod that passes downward through the connecting guide hole, and a connecting spring is sleeved on the connecting rod between the forming upper die and the upper die seat.

4. The track roller rim forming mold according to claim 1, characterized in that: The end surface forming module is arranged at the same height as the placement groove when it is at its highest position.

5. The track roller rim forming mold according to claim 1, characterized in that: An inner tube forming guide cone surface is provided on the upper section of the inner tube forming column.

6. The track roller rim forming mold according to claim 1, characterized in that: An outer edge forming guide cone surface is provided at the upper end of the lower forming channel.

7. The track roller rim forming mold according to claim 1, characterized in that: The lifting drive comprises a lifting cylinder installed on the lower die base.

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