A cold heading die for spherical rollers

Abstract

This utility model relates to the field of bearing roller processing technology, specifically disclosing a special cold heading mold for spherical rollers. It includes a lower mold with a lower cavity on its upper surface, an upper mold on its upper side, and an upper cavity opposite to the lower cavity on its lower surface. It also includes a blanking mechanism disposed between the lower and upper molds for processing the spherical rollers after cold heading. Through the blanking mechanism, after the spherical rollers are cold-headed, when the upper mold moves upward and contacts the flange on the guide post, it pulls the guide post and connecting plate upward, causing the top plate on the ejector rod to lift upward, ejecting the spherical rollers from the lower cavity. Simultaneously, the discharge rod at the lower end of the top plate separates from the debris discharge hole. An air source is connected to the connecting pipe and the cleaning pipe, allowing gas in the connecting pipe to enter the lower cavity through the air inlet and blow off impurities from the debris discharge hole. At the same time, gas in the cleaning pipe is sprayed out through the air nozzle to clean the upper side of the lower mold, improving the processing quality of the subsequent cold heading.

Description

Technical Field

[0001] This utility model relates to the field of bearing roller processing technology, and in particular to a special cold heading die for spherical rollers. Background Technology

[0002] An existing cold heading die for bearing rollers, with publication number CN 209614105 U, forms a cavity with curved sides by combining an upper and lower die cavity. This cavity can completely fit the bearing roller to be processed, thereby achieving a single cold heading process to form a roller with a spherical rolling surface. This reduces the machining allowance at the center and ends of the roller, improves the utilization rate of raw materials, and also improves processing efficiency. In addition, during the cold heading process, the upper die moves along the guide rod, and the coaxiality of the upper and lower dies is good, avoiding eccentricity that could cause the bearing blank to bulge and damage the die cavity or form flash during processing. However, after the roller is cold headed, the lower die cavity may have impurities on the surface of the cavity, affecting the quality of the roller in subsequent processing. Utility Model Content

[0003] The purpose of this invention is to provide a cold heading mold specifically for spherical rollers in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A cold heading die for spherical rollers includes a lower die with a lower cavity on its upper surface, an upper die on its upper side, and an upper cavity on its lower surface opposite to the lower cavity. The die also includes a blanking mechanism disposed between the lower and upper dies for processing the spherical rollers after cold heading. The blanking mechanism includes a blanking component and a cleaning component. The blanking component includes guide pillars passing through the lower and upper dies, with flanges on the upper side of the guide pillars. The guide pillars are positioned opposite each other on both sides, and a groove extends laterally through the lower end of the lower die. A connecting plate is fixed to the lower end of the guide post. A push rod is provided at the upper end of the connecting plate, passing through the lower cavity. A top plate is fixed to the upper end of the push rod. A spring is sleeved on the outer diameter of the push rod on the upper side of the connecting plate. The cleaning assembly includes circumferentially distributed debris holes at the bottom of the lower cavity. The debris holes pass through the lower mold. An air inlet is vertically opened at the bottom of the lower cavity. A connecting pipe is installed at the lower end of the air inlet. A mounting seat is provided on the side wall of the upper mold. A cleaning pipe is provided on the mounting seat. Air nozzles are evenly distributed on the side of the cleaning pipe facing the upper mold. An air source is connected to the cleaning pipe and the connecting pipe.

[0006] Further configuration: The guide pillars are slidably connected to the lower and upper molds, and the ejector pins are located at the center of the lower cavity.

[0007] Further configuration: The ejector pin is slidably connected to the lower mold, a recessed platform is provided at the bottom of the lower cavity, the top plate is slidably connected to the recessed platform, and the heights of the top plate and the recessed platform are the same.

[0008] Further details: The bottom surface of the top plate is evenly distributed with material-pouring rods, the shape of which is smaller than that of the debris discharge hole.

[0009] Further details: A chrome-plated coating is applied to the surfaces of the lower and upper cavities.

[0010] Further settings: After the upper die moves upward and contacts the flange on the guide post, the distance between the upper die and the lower die is greater than the height of the spherical roller.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] By configuring the feeding and cleaning components of the feeding mechanism, after the spherical roller is cold-forged, when the upper die moves upward and contacts the flange on the guide post, it pulls the guide post and connecting plate upward as a whole, causing the top plate on the ejector rod to lift upward and eject the spherical roller in the lower cavity. At the same time, the material discharge rod at the lower end of the top plate separates from the debris discharge hole, and the connecting pipe and cleaning pipe are connected to the air source. The gas in the connecting pipe enters the lower cavity through the air inlet and blows off the impurities on the inside, which fall out of the debris discharge hole. Meanwhile, the gas in the cleaning pipe is sprayed out through the air nozzle to clean the upper side of the lower die, thus improving the processing quality of the subsequent cold forging. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a special cold heading die for spherical rollers according to the present invention;

[0015] Figure 2 This is a schematic diagram of another perspective of the structure of a cold heading die for spherical rollers described in this utility model;

[0016] Figure 3 This is a schematic diagram of the main cross-sectional structure of a cold heading die for spherical rollers according to the present invention;

[0017] Figure 4 This is a schematic diagram of the lower die half-section structure of a cold heading die for spherical rollers according to the present invention;

[0018] Figure 5 This is an exploded view of the material feeding mechanism for a cold heading die for spherical rollers described in this utility model.

[0019] Figure 6This is a top view of the lower die structure of a cold heading die for spherical rollers as described in this utility model.

[0020] The annotations in the attached figures are explained as follows:

[0021] 1. Lower mold; 11. Lower cavity; 12. Groove; 2. Upper mold; 21. Upper cavity; 31. Top plate; 32. Ejector pin; 33. Spring; 34. Connecting plate; 35. Guide post; 36. Flange; 41. Air inlet; 42. Connecting pipe; 43. Waste discharge hole; 44. Discharge rod; 45. Mounting base; 46. Cleaning pipe; 47. Air nozzle. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] like Figures 1-6As shown, a cold heading die for spherical rollers includes a lower die 1, with a lower cavity 11 on its upper surface. An upper die 2 is located above the lower die 1, with an upper cavity 21 on its lower surface opposite to the lower cavity 11. Both the lower cavity 11 and the upper cavity 21 are coated with a chrome plating. The lower cavity 11 and the upper cavity 21 have the same shape as the spherical roller. The die also includes a blanking mechanism located between the lower die 1 and the upper die 2 for processing the spherical roller after cold heading.

[0026] In this embodiment: the feeding mechanism includes a feeding assembly and a cleaning assembly. The feeding assembly includes a guide post 35 that passes through the lower mold 1 and the upper mold 2. A flange 36 is provided on the upper side of the upper mold 2 on the guide post 35. The two sides of the guide post 35 are arranged opposite to each other. A groove 12 is transversely passed through the lower end of the lower mold 1. A connecting plate 34 is fixed to the lower end of the guide post 35. A push rod 32 that passes through the lower cavity 11 is provided on the upper end of the connecting plate 34. A top plate 31 is fixed to the upper end of the push rod 32. A spring 33 is sleeved on the outer diameter of the push rod 32 on the upper side of the connecting plate 34. The guide post 35 is slidably connected to the lower mold 1 and the upper mold 2. The push rod 32 is located at the center of the lower cavity 11. Rod 32 is slidably connected to lower mold 1. A recessed platform is provided at the bottom of lower cavity 11. Top plate 31 is slidably connected to the recessed platform, and the height of top plate 31 and recessed platform are the same. After upper mold 2 moves upward and contacts flange 36 on guide post 35, the distance between upper mold 2 and lower mold 1 is greater than the height of spherical roller. After spherical roller is cold-forged in lower cavity 11 and upper cavity 21, when upper mold 2 moves upward and contacts flange 36 on guide post 35, it pulls guide post 35 and connecting plate 34 to move upward as a whole, so that connecting plate 34 squeezes spring 33 on ejector rod 32 to lift top plate 31 upward and eject spherical roller in lower cavity 11.

[0027] The cleaning assembly includes circumferentially distributed debris-collecting holes 43 at the bottom of the lower cavity 11, which penetrate the lower mold 1. A vertical air inlet 41 is provided at the bottom of the lower cavity 11, with a connecting pipe 42 installed at the lower end of the air inlet 41. A mounting base 45 is provided on the side wall of the upper mold 2, and a cleaning pipe 46 is mounted on the mounting base 45. Air nozzles 47 are evenly distributed at intervals on the side of the cleaning pipe 46 facing the upper mold 2. An air source is connected to the cleaning pipe 46 and the connecting pipe 42. A material-returning rod 44 is evenly distributed circumferentially on the lower end face of the top plate 31 for material return. The rod 44 is smaller than the impurity discharge hole 43. After the top plate 31 is lifted upward, the spherical roller in the lower cavity 11 is ejected. The material discharge rod 44 at the lower end of the top plate 31 is separated from the impurity discharge hole 43. The air source is connected to the connecting pipe 42 and the cleaning pipe 46, so that the gas in the connecting pipe 42 enters the lower cavity 11 through the air inlet 41 and blows the impurities on the inside off and they fall from the impurity discharge hole 43. At the same time, the gas in the cleaning pipe 46 is sprayed out through the air nozzle 47 to clean the upper side of the lower mold 1 and improve the quality of the next cold heading.

[0028] The working principle and usage process of this utility model are as follows: After the spherical roller is cold-forged in the lower cavity 11 and the upper cavity 21, when the upper mold 2 moves upward, it contacts the flange 36 on the guide post 35, which pulls the guide post 35 and the connecting plate 34 to move upward as a whole. This causes the connecting plate 34 to squeeze the spring 33 on the push rod 32, lifting the top plate 31 upward and pushing out the spherical roller in the lower cavity 11. At the same time, the pouring rod 44 at the lower end of the top plate 31 separates from the impurity hole 43. The air source is connected to the connecting pipe 42 and the cleaning pipe 46, so that the gas in the connecting pipe 42 enters the lower cavity 11 through the air inlet 41 and blows the impurities on the inside down into the impurity hole 43. At the same time, the gas in the cleaning pipe 46 is sprayed out through the air nozzle 47 to clean the upper side of the lower mold 1. After processing, the upper mold 2 moves downward, and the connecting plate 34 drives the pouring rod 44 at the lower end of the top plate 31 to insert into the impurity hole 43, pushing out the impurities that have not fallen into the impurity hole 43.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cold heading die for spherical rollers, comprising a lower die (1), wherein a lower cavity (11) is provided on the upper end face of the lower die (1), an upper die (2) is provided on the upper side of the lower die (1), and an upper cavity (21) is provided on the lower end face of the upper die (2) opposite to the lower cavity (11), characterized in that: It also includes a blanking mechanism disposed between the lower mold (1) and the upper mold (2) for processing the spherical roller after cold heading. The blanking mechanism includes a blanking component and a cleaning component. The blanking component includes a guide post (35) that passes through the lower mold (1) and the upper mold (2). A flange (36) is provided on the upper side of the upper mold (2) on the guide post (35). The two sides of the guide post (35) are arranged opposite to each other. A groove (12) is transversely penetrating the lower end of the lower mold (1). A connecting plate (34) is fixed to the lower end of the guide post (35). A push rod (32) that passes through the lower cavity (11) is provided on the upper end of the connecting plate (34). A top plate (3) is fixed to the upper end of the push rod (32). 1) A spring (33) is sleeved on the outer diameter of the push rod (32) on the upper side of the connecting plate (34). The cleaning assembly includes a debris-collecting hole (43) evenly distributed around the bottom of the lower cavity (11). The debris-collecting hole (43) penetrates the lower mold (1). An air inlet (41) is vertically opened at the bottom of the lower cavity (11). A connecting pipe (42) is installed at the lower end of the air inlet (41). A mounting seat (45) is provided on the side wall of the upper mold (2). A cleaning pipe (46) is provided on the mounting seat (45). Air nozzles (47) are evenly distributed on the cleaning pipe (46) facing the upper mold (2). An air source is connected to the cleaning pipe (46) and the connecting pipe (42).

2. The cold heading die for spherical rollers according to claim 1, characterized in that: The guide post (35) is slidably connected to the lower mold (1) and the upper mold (2), and the push rod (32) is located at the center of the lower cavity (11).

3. A cold heading die for spherical rollers according to claim 2, characterized in that: The top rod (32) is slidably connected to the lower mold (1), the bottom of the lower cavity (11) is provided with a recessed platform, the top plate (31) is slidably connected to the recessed platform, and the height of the top plate (31) is the same as that of the recessed platform.

4. A cold heading die for spherical rollers according to claim 1, characterized in that: The top plate (31) has a material-pouring rod (44) evenly distributed around its lower end face. The material-pouring rod (44) is smaller in shape than the waste-falling hole (43).

5. A cold heading die for spherical rollers according to claim 1, characterized in that: The surfaces of the lower cavity (11) and the upper cavity (21) are provided with a chrome plating coating.

6. A cold heading die for spherical rollers according to claim 1, characterized in that: After the upper mold (2) moves upward and contacts the flange (36) on the guide post (35), the distance between the upper mold (2) and the lower mold (1) is greater than the height of the spherical roller.

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