A rolling device for improving the surface support rate of powder metallurgy products

Abstract

The present invention discloses a rolling device for improving the surface support rate of powder metallurgy products, comprising a rotary drive mechanism, a rolling positioning mechanism and a split rolling mechanism arranged in sequence from bottom to top; the rolling positioning mechanism comprises a rolling plate, which is provided with a station slot and a positioning assembly, and can fix the powder metallurgy product in the station slot accordingly; the rolling plate is installed on the rotary drive mechanism and can drive the entire rolling plate to rotate. The positions of the needle rollers of the present invention are different, and the range of rolling is also different; in specific use, after the powder metallurgy product is fixed in the station slot, it is selected to use an internal pressure core or an external pressure core for rolling according to the size of the powder metallurgy product. The two groups of needle rollers in different positions can adapt to most powder metallurgy products of different sizes, with a wide adaptability, reasonable structural design, and easy use.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy product manufacturing equipment, and in particular to a rolling device for improving the surface support rate of powder metallurgy products. Background Art

[0002] In the existing technology, powder metallurgy materials are widely used in various industries due to their excellent performance, and the support rate of the surface of powder metallurgy products is the contour support length rate, referred to as support rate (TP).

[0003] In the existing technology, the surface contours on both sides of powder metallurgy products are formed by turning or grinding. Although traditional cutting and grinding can stably ensure the surface roughness of the end face, due to the characteristics of powder metallurgy materials, there will be a large number of gaps on the surfaces of both sides. A large number of gaps will appear on the surface of the powder metallurgy product. Therefore, it is necessary to design a rolling device to roll the two sides of the powder metallurgy product.

[0004] For example, the patent document with publication (announcement) number CN112692288A discloses "a device for improving the surface support rate of powder metallurgy products". This technical solution is designed with equipment such as rolling plates and servo presses, which can roll the surface of powder metallurgy products, thereby improving the surface support rate of the products.

[0005] However, the structure of the above technical solution is actually relatively simple, because only one circle of needle rollers is set on the rolling disk. In actual use, since different powder metallurgy products have different outer diameters, the position of the outer surface of the powder metallurgy products is also different. The powder metallurgy products with larger diameters are rolled on the outside, while the powder metallurgy products with smaller diameters are rolled on the inside. The needle roller design in the existing technology cannot guarantee that it can meet the needs of powder metallurgy products of all sizes.

[0006] In addition, the above technical solution only describes a positioning mechanism for powder metallurgy products on the rolling plate, but does not describe the specific structure. The positioning mechanism for powder metallurgy products in the prior art is not suitable for positioning powder metallurgy products of all sizes.

[0007] On the other hand, most powder metallurgy products are made into gear products, and the positioning mechanism is positioned through the outer tooth structure of the powder metallurgy gear. However, a large force will be generated during positioning and fixing, which may damage the outer tooth body.

[0008] In addition, when positioning powder metallurgy products of different sizes, the position of the powder metallurgy products cannot be effectively determined, resulting in positioning deviation, etc., and the upper rolling device cannot correctly roll to the side of the tooth, affecting the rolling effect and quality.

[0009] Therefore, in order to solve the above problems, it is necessary to develop a rolling device for improving the surface support rate of powder metallurgy products. Summary of the Invention

[0010] The purpose of the present invention is to address the deficiencies in the prior art and provide a rolling device for improving the surface support rate of powder metallurgy products. The technical solution is as follows:

[0011] A rolling device for improving the surface support rate of powder metallurgy products includes a rotary drive mechanism, a rolling positioning mechanism and a split rolling mechanism arranged in sequence from bottom to top; the rolling positioning mechanism includes a rolling plate, which is provided with a work station slot and a positioning component, and can fix the powder metallurgy product in the work station slot accordingly; the rolling plate is installed on the rotary drive mechanism and can drive the entire rolling plate to rotate.

[0012] The split rolling mechanism includes a cylindrical external pressure core and a cross-shaped internal pressure core; the lower end of the external pressure core is equipped with a circle of external pressure rollers that can rotate accordingly, and a cross groove corresponding to the shape of the internal pressure core and transparent from top to bottom is provided at the center position; the lower end of the internal pressure core is equipped with an internal pressure roller, and the internal pressure core is correspondingly sleeved in the cross groove of the external pressure core, so that the two cores are installed in a sleeve-type split manner as a whole.

[0013] A servo press is installed on the upper end of the external pressure core and the upper end of the internal pressure core respectively, and the servo press can drive the external pressure core and the internal pressure core to move up and down respectively.

[0014] Furthermore, a total of four internal pressure needle rollers are provided at the lower end of the internal pressure core; a total of four external pressure needle rollers are provided at the lower end of the external pressure core, and the internal pressure needle rollers and the external pressure needle rollers are evenly spaced from each other, and there is an overlapping part between the internal pressure needle rollers and the external pressure needle rollers in the radial direction.

[0015] Furthermore, the internal pressure core and the external pressure core are of the same height, and the internal pressure needle rollers on the internal pressure core and the external pressure needle rollers on the external pressure core are of the same size.

[0016] Furthermore, the work station slot is configured as a circular slot structure, and a positioning slot passing through the center of the work station slot is provided in the work station slot; the positioning assembly includes push-pull devices provided on both sides of the positioning slot, the push-pull devices are embedded in the rolling plate, and the push-pull rods of the push-pull devices on both sides extend into the positioning slots respectively, and the rod ends of the push-pull rods are installed with positioning rods extending vertically upward, and the positioning rods extend upward to the work station slot area.

[0017] Furthermore, the push-pull devices on both sides are set to move synchronously, and the push-pull rods on both sides move outward or inward at the same time; the positioning rods on both sides always converge at the center of the work station slot.

[0018] Furthermore, after the internal pressure core is installed on the external pressure core, an oil lubrication gap is left between the internal pressure core and the external pressure core; and a circle of annular oil pots is provided above the oil lubrication gap between the two cores, and an oil guide pipe is installed at the bottom of the annular oil pot to guide the lubricating oil in the annular oil pot into the oil lubrication gap between the internal pressure core and the external pressure core.

[0019] Furthermore, an oil drain groove is provided in the work station groove, which is connected to the positioning groove and is arranged in a cross shape, and both sides of the oil drain groove extend to the outside of the rolling plate.

[0020] Beneficial effects: The present invention has the following beneficial effects:

[0021] 1) The present invention configures the upper rolling mechanism as a split rolling mechanism. Specifically, the internal pressure core is installed in the cross slot in the external pressure core. The two are independently designed and can move up and down in a split manner under the drive of the upper servo press. The internal pressure core is configured in a cross shape, and needle rollers are installed at the lower ends of the two cores. After such a configuration, the positions of the needle rollers are different, and the rolling ranges that can be achieved are also different. During specific use, after the powder metallurgy product is fixed in the work station slot, the internal pressure core or the external pressure core is selected for rolling according to the size of the powder metallurgy product. The two sets of needle rollers in different positions can adapt to most powder metallurgy products of different sizes, with wide adaptability, reasonable structural design, and easy use.

[0022] 2) The positioning assembly of the present invention is adaptable to powder metallurgy products of different sizes, as long as an axial hole is provided in the middle, and the powder metallurgy product can be fixed in a very stable position. On the other hand, it is fixed from the internal gear ring, without damaging the external gear body, and the structure is very reasonable. Moreover, because the push-pull devices on both sides move synchronously, no matter how it is placed, the powder metallurgy product is always located in the center of the station slot, which can effectively cooperate with the rolling device above for rolling. The overall structural design is very ingenious and reasonable.

[0023] 3) The present invention also includes an annular oil pot and an oil drain groove. An oiling gap is provided between the internal pressure core and the external pressure core. The annular oil pot is located above the oiling gap and can introduce lubricating oil into the oiling gap through an oil guide pipe. This lubricates the internal pressure core and the external pressure core, allowing for smooth relative sliding between them. Furthermore, the lubricating oil falls from the oiling gap into the work station groove below, lubricating the surface of the powder metallurgy product below, ensuring smooth rolling.

[0024] 4) In the present invention, the lubricating oil will also fall into the positioning groove and can lubricate the push-pull rod; and the present invention is also provided with an oil drain groove connected to the positioning groove, because the final lubricating oil is accumulated in the positioning groove and the oil drain groove, and through the reciprocating motion of the push-pull rod, the lubricating oil can be finally discharged from the oil drain groove. The overall discharge of the oil drain groove is very smooth because of the push-pull extrusion effect of the push-pull rod, and the structural design is very clever and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the present invention;

[0026] Figure 2 for Figure 1 Middle AA section view;

[0027] Figure 3 for Figure 1 Middle B view. DETAILED DESCRIPTION

[0028] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 、 Figure 2 and Figure 3 As shown, a rolling device for improving the surface support rate of powder metallurgy products includes a rotating drive mechanism 1, a rolling positioning mechanism and a split rolling mechanism arranged in sequence from bottom to top; the rolling positioning mechanism includes a rolling plate 2, which is provided with a work station slot 3 and a positioning component, and can fix the powder metallurgy product 17 in the work station slot 3 accordingly. The rolling plate 2 is installed on the rotating drive mechanism 1, and can drive the entire rolling plate 2 to rotate.

[0030] The split rolling mechanism includes a cylindrical external pressure core 4 and a cross-shaped internal pressure core 5; the lower end of the external pressure core 4 is equipped with a circle of external pressure needle rollers 6 that can rotate accordingly, and a cross groove 7 corresponding to the shape of the internal pressure core 5 and transparent from top to bottom is provided at the center position; the lower end of the internal pressure core 5 is equipped with an internal pressure needle roller 8, and the internal pressure core 5 is correspondingly sleeved in the cross groove 7 of the external pressure core 4, so that the two cores are installed in a sleeve-type split manner as a whole.

[0031] Servo presses 9 are installed on the upper ends of the external pressure core 4 and the internal pressure core 5 respectively. The servo presses 9 can respectively drive the external pressure core 4 and the internal pressure core 5 to move up and down.

[0032] In the present invention, the upper rolling mechanism is arranged as a split rolling mechanism, specifically, the internal pressure core is installed in the cross groove in the external pressure core. The two are independently designed and can be moved up and down in a split manner under the drive of the servo press above, and the internal pressure core is arranged in a cross shape. The lower ends of the two cores are installed with needle rollers. After such arrangement, the positions of the needle rollers are different, and the rolling ranges are also different. During specific use, after the powder metallurgy product is fixed in the work station slot, the internal pressure core or the external pressure core is selected for rolling according to the size of the powder metallurgy product. The two groups of needle rollers in different positions can adapt to most powder metallurgy products of different sizes, have a wide adaptability, a reasonable structural design, and are easy to use.

[0033] There are four internal pressure needle rollers 8 at the lower end of the internal pressure core 5; there are four external pressure needle rollers 6 at the lower end of the external pressure core 4, and the internal pressure needle rollers 8 and the external pressure needle rollers 6 are evenly spaced from each other, and there is an overlapping part between the internal pressure needle rollers 8 and the external pressure needle rollers 6 in the radial direction.

[0034] The internal pressure core 5 and the external pressure core 4 have the same height, and the internal pressure needle roller 8 on the internal pressure core 5 and the external pressure needle roller 6 on the external pressure core 4 have the same size.

[0035] In the present invention, after the core is driven downward by the servo press to press the powder metallurgy product, the integral rolling disc is driven to rotate by the rotary drive motor, so that the needle roller rolls on the surface of the powder metallurgy product to achieve rolling.

[0036] The work station slot 3 is configured as a circular slot structure, and a positioning slot 10 is provided in the work station slot 3 and passes through the center of the work station slot 3; the positioning assembly includes a push-pull device 11 provided on both sides of the positioning slot 10, the push-pull device 11 is embedded in the rolling plate 2, and the push-pull rods 12 of the push-pull devices 11 on both sides extend into the positioning slot 10 accordingly, and the rod ends of the push-pull rods 12 are installed with positioning rods 13 extending vertically upward, and the positioning rods 13 extend upward to the work station slot 3 area.

[0037] The push-pull devices 11 on both sides are set to move synchronously, and the push-pull rods 12 on both sides move outward or inward at the same time; the positioning rods 13 on both sides always converge at the center position of the work station slot 3.

[0038] The station slot of the present invention is used to place powder metallurgy products, which can be specifically set as powder metallurgy gears. Powder metallurgy products of different sizes need to be fixed when placed in the station slot. Powder metallurgy products in the prior art usually have an axial hole for installation in the middle or are directly set as Figure 2 The gear ring structure in the present invention is fixed by using the inner ring structure of the powder metallurgy product.

[0039] When in use, the powder metallurgy product is placed directly in the work station slot. In the original position, the positioning rods on both sides are located at the center of the work station slot. When the powder metallurgy product is placed, the positioning rods need to be located in the internal gear ring of the powder metallurgy product. Then the push-pull devices on both sides are started at the same time, and the push-pull rods move outward at the same time, driving the positioning rods on both sides to move outward synchronously, thereby gradually fixing the powder metallurgy product in the work station slot, and then cooperating with the rolling mechanism above to perform rolling.

[0040] On the one hand, the above structure of the present invention can adapt to powder metallurgy products of different sizes, as long as an axial hole is provided in the middle, and the powder metallurgy products can be fixed, and the position is very stable; on the other hand, it is fixed from the internal gear ring, and will not damage the external tooth body part, and the structure is very reasonable; and because the push-pull devices on both sides move synchronously, no matter how it is placed, in the end, the position of the powder metallurgy product must be located in the middle of the work station slot, and it can effectively cooperate with the rolling device above for rolling, and the overall structural design is very ingenious and reasonable.

[0041] After the internal pressure core 5 is mounted on the external pressure core 4, an oil lubrication gap 16 is left between the internal pressure core 5 and the external pressure core 4; and above the oil lubrication gap 16 between the two cores is a circle of annular oil pots 14, and an oil guide pipe 15 is installed at the bottom of the annular oil pot 14 to guide the lubricating oil in the annular oil pot 14 into the oil lubrication gap 16 between the internal pressure core 5 and the external pressure core 4.

[0042] An oil drain groove 18 is further provided in the work station groove 3 . The oil drain groove 18 is connected to the positioning groove 10 and is arranged in a cross shape. Both sides of the oil drain groove 18 extend to the outside of the rolling plate 2 .

[0043] The present invention also provides structures such as an annular oil pot and an oil drain groove. In the present invention, an oiling gap is left between the internal pressure core and the external pressure core. The annular oil pot is arranged above the oiling gap, and the lubricating oil can be introduced into the oiling gap through an oil guide pipe. On the one hand, it can lubricate the internal pressure core and the external pressure core, so that the relative sliding between the two is very smooth; on the other hand, the lubricating oil falls from the oiling gap to the work station groove below, which can lubricate the surface of the powder metallurgy product below, making the rolling very smooth.

[0044] In addition, the lubricating oil will fall into the positioning groove and lubricate the push-pull rod. In addition, the present invention is also provided with an oil drain groove connected to the positioning groove, because the final lubricating oil is accumulated in the positioning groove and the oil drain groove, and the lubricating oil can be finally discharged from the oil drain groove through the reciprocating motion of the push-pull rod. The overall discharge of the oil drain groove is very smooth because of the push-pull extrusion effect of the push-pull rod, and the structural design is very clever and reasonable.

[0045] The above specific implementation method is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made based on the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A rolling device for improving the surface support rate of powder metallurgy products, characterized by: The invention comprises a rotary drive mechanism (1), a rolling positioning mechanism and a split rolling mechanism arranged in sequence from bottom to top; the rolling positioning mechanism comprises a rolling plate (2), the rolling plate (2) being provided with a station groove (3) and a positioning assembly, and being capable of fixing a powder metallurgy product (17) in the station groove (3) accordingly; the rolling plate (2) being mounted on the rotary drive mechanism (1) and being capable of driving the entire rolling plate (2) to rotate; The split rolling mechanism comprises a cylindrical external pressure core (4) and a cross-shaped internal pressure core (5); a circle of correspondingly rotatable external pressure roller needles (6) are installed at the lower end of the external pressure core (4), and a cross groove (7) corresponding to the shape of the internal pressure core (5) and transparent from top to bottom is provided at the center; an internal pressure roller needle (8) is correspondingly installed at the lower end of the internal pressure core (5), and the internal pressure core (5) is correspondingly sleeved in the cross groove (7) of the external pressure core (4), so that the two cores are installed in a sleeve-type split manner as a whole; Furthermore, a servo press (9) is correspondingly installed at the upper end of the external pressure core (4) and the upper end of the internal pressure core (5), and the servo press (9) can respectively drive the external pressure core (4) and the internal pressure core (5) to move up and down; The lower end of the internal pressure core (5) is provided with four internal pressure needle rollers (8); the lower end of the external pressure core (4) is provided with four external pressure needle rollers (6), and the internal pressure needle rollers (8) and the external pressure needle rollers (6) are evenly spaced from each other, and the internal pressure needle rollers (8) and the external pressure needle rollers (6) have overlapping portions in the radial direction; The internal pressure core (5) and the external pressure core (4) are of the same height, and the internal pressure needle roller (8) on the internal pressure core (5) and the external pressure needle roller (6) on the external pressure core (4) are of the same size; The workstation slot (3) is configured as a circular slot structure, and a positioning slot (10) penetrating the center of the workstation slot (3) is configured in the workstation slot (3); the positioning assembly includes a push-pull device (11) provided on both sides of the positioning slot (10), the push-pull device (11) is embedded in the rolling plate (2), and the push-pull rods (12) of the push-pull devices (11) on both sides extend into the positioning slot (10) respectively, and the rod ends of the push-pull rods (12) are provided with positioning rods (13) extending vertically upward, and the positioning rods (13) extend upward to the workstation slot (3) area.

2. A rolling device for improving the surface support rate of powder metallurgy products according to claim 1, characterized in that: The push-pull devices (11) on both sides are set to move synchronously, and the push-pull rods (12) on both sides move outward or inward at the same time; the positioning rods (13) on both sides always converge at the center position of the work station slot (3).

3. A rolling device for improving the surface support rate of powder metallurgy products according to claim 1, characterized in that: After the internal pressure core (5) is mounted on the external pressure core (4), an oiling gap (16) is left between the internal pressure core (5) and the external pressure core (4); and an annular oil pot (14) is provided above the oiling gap (16) between the two cores, and an oil guide pipe (15) is installed at the bottom of the annular oil pot (14) to guide the lubricating oil in the annular oil pot (14) into the oiling gap (16) between the internal pressure core (5) and the external pressure core (4).

4. A rolling device for improving the surface support rate of powder metallurgy products according to claim 3, characterized in that: An oil drain groove (18) is also provided in the work station groove (3). The oil drain groove (18) is connected to the positioning groove (10) and is arranged in a cross shape. Both sides of the oil drain groove (18) extend to the outside of the rolling plate (2).

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