A bearing ball extrusion forming device and its process

Abstract

The present invention discloses a bearing ball extrusion forming device and its process, belonging to the technical field of bearing ball production and processing. The bearing ball extrusion forming device includes a box body, a discharge chute, a stable material guiding component, a time-delay component and an extrusion forming component; the time-delay component includes a top plate, an upper time-delay plate and a lower time-delay plate; the top plate is fixedly installed on the top of the box body, the lower end of the top plate is fixedly connected with the upper time-delay plate, and the inner bottom of the box body is fixedly connected with the lower time-delay plate which is symmetrically arranged with the upper time-delay plate up and down. The lower end of the upper time-delay plate and the upper end of the lower time-delay plate are both located between the first spiral rolling mill and the second spiral rolling mill. By the above method, the present invention can avoid the problems of low ball forming rate and many burrs caused by the short contact time between the spiral rolling mill and the ball during extrusion, increase the forming time of the ball, make the shape of the ball closer to a spherical shape, improve the sphericity of the ball, and at the same time reduce the burrs of the ball. During secondary grinding, the grinding time is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing ball production and processing, and particularly relates to a bearing ball extrusion forming device and its process. Background Art

[0002] The forming principle of traditional bearing balls is as follows: a raw material rod is introduced between two hemispherical metal cavities of an extrusion forming device. By controlling the two hemispherical metal cavities to close into a spherical structure, the raw material rod is intercepted, and the raw material in the two hemispherical metal cavities is extruded into a ball, thereby forming a bearing ball.

[0003] However, due to a certain gap at the closing position of the two hemispherical metal cavities during extrusion, there is usually a circle of burrs on the formed bearing balls, resulting in a long secondary grinding time.

[0004] Based on this, the present invention designs a bearing ball extrusion forming device and its process to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a bearing ball extrusion forming device and its process.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0007] A bearing ball extrusion forming device includes a box body. A discharge chute for discharging materials, which is communicated with the bottom of the box body, is fixedly connected to the lower end of the box body.

[0008] A stable material guiding assembly for feeding the heated raw material rod is installed on the box body.

[0009] An extrusion forming assembly for extruding and forming the raw material rod is installed on the box body. The extrusion forming assembly includes a driving assembly, a first spiral rolling mill and a second spiral rolling mill. The first spiral rolling mill and the second spiral rolling mill are rotatably connected inside the box body. The driving assembly is respectively connected to the first spiral rolling mill and the second spiral rolling mill, and the driving assembly drives the first spiral rolling mill and the second spiral rolling mill to rotate synchronously and in the same direction. The discharge end of the stable material guiding assembly guides the raw material rod between the second spiral rolling mill and the first spiral rolling mill.

[0010] A delay assembly for preventing the balls from falling is installed on the box body. The delay assembly includes a top plate, an upper delay plate and a lower delay plate. The top plate is fixedly installed on the top of the box body. The lower end of the top plate is fixedly connected to the upper delay plate. The inner bottom of the box body is fixedly connected to the lower delay plate which is symmetrically arranged with the upper delay plate up and down. The lower end of the upper delay plate and the upper end of the lower delay plate are both located between the first spiral rolling mill and the second spiral rolling mill.

[0011] Furthermore, the drive assembly includes a first connecting shaft, a chain, a second connecting shaft, a driving motor, a sprocket and a third connecting shaft; the output end of the driving motor is fixedly connected to the second connecting shaft, the other end of the second connecting shaft is hinged to one end of the first connecting shaft, the other end of the first connecting shaft passes through the side wall of the box and is fixedly connected to one end of the first spiral roller, and the first connecting shaft is rotatably connected to the side wall of the box; a sprocket is fixedly connected to the first connecting shaft, the sprocket is transmission-connected to another sprocket through a chain, the other sprocket is fixedly installed on the third connecting shaft, one end of the third connecting shaft passes through the side wall of the box and is fixedly connected to one end of the second spiral roller, and the other end of the second spiral roller is rotatably connected to the inner wall of the box.

[0012] Furthermore, the other end of the first spiral roller is rotatably connected to the inner wall of the box, and the third connecting shaft is rotatably connected to the side wall of the box.

[0013] Furthermore, the lengths of the upper delay plate and the lower delay plate are both shorter than the lengths of the first spiral roller and the second spiral roller.

[0014] Furthermore, the distance between the left end of the upper delay plate and the lower delay plate and the left end of the first spiral roller or the second spiral roller is at least greater than a circular ball hole.

[0015] Furthermore, the distance between the right end of the upper delay plate and the lower delay plate and the right end of the first spiral roller or the second spiral roller is at least greater than a circular ball hole.

[0016] Furthermore, the distance between the upper delay plate and the lower delay plate is greater than the diameter of a ball.

[0017] Furthermore, the stable material guiding assembly includes a transverse fixed plate, an n-shaped support plate, a sliding rod, a spring, a pressure roller, an n-shaped movable plate and a support roller; two groups of transverse fixed plates are fixedly installed on the outer side wall of the box body, and several groups of support rollers are rotatably installed between the transverse fixed plates on both sides, the two ends of the n-shaped support plate are respectively fixedly connected to the two transverse fixed plates, a sliding rod is slidably connected to the n-shaped support plate, the lower end of the sliding rod is fixedly connected to the n-shaped movable plate, a group of pressure rollers are rotatably connected inside the n-shaped movable plate, a spring is installed on the sliding rod, and the spring is located between the top of the n-shaped movable plate and the inner top of the n-shaped support plate.

[0018] Furthermore, a guide cylinder is fixedly mounted on the inner wall of the box.

[0019] The present invention also provides a bearing ball extrusion molding process, which uses the bearing ball extrusion molding equipment to perform bearing ball extrusion molding, including the following steps:

[0020] Step 1: Place the raw material rod between the support roller and the pressing roller and feed it into the guiding cylinder inside the box. The guiding cylinder guides the raw material rod between the second spiral rolling roller and the first spiral rolling roller.

[0021] Step 2: Start the driving motor. The driving motor drives the second connecting shaft to rotate. The second connecting shaft drives the first connecting shaft to rotate. The first connecting shaft drives the first spiral rolling roller to rotate. At the same time, the first connecting shaft drives the sprocket on it to rotate. The sprocket drives another sprocket to rotate through the chain. The other sprocket drives the third connecting shaft to rotate. The third connecting shaft drives the second spiral rolling roller to rotate, thus realizing the synchronous and same-direction rotation of the first spiral rolling roller and the second spiral rolling roller. The raw material rod is extruded into spherical balls by the second spiral rolling roller and the first spiral rolling roller, and the balls are continuously shaped by the rotation of the first spiral rolling roller and the second spiral rolling roller.

[0022] Step 3: During the rotation of the balls, due to the blocking of the upper delay plate and the lower delay plate, the balls continue to be shaped between the first spiral rolling roller and the second spiral rolling roller until the first spiral rolling roller and the second spiral rolling roller convey the balls to a position where they are separated from the upper delay plate and the lower delay plate. Then, the balls fall into the discharge chute below the box through the circular ball holes between the first spiral rolling roller and the second spiral rolling roller for discharging.

[0023] Beneficial effects

[0024] In the present invention, the raw material rod is pre-heated by an intermediate frequency heating furnace and then enters the box through the stable material guiding assembly. The first spiral rolling roller and the second spiral rolling roller intercept the raw material rod into balls, and the balls are continuously shaped by the rotation of the first spiral rolling roller and the second spiral rolling roller. During the rotation of the balls, due to the blocking of the upper delay plate and the lower delay plate, the balls continue to be shaped between the first spiral rolling roller and the second spiral rolling roller until the first spiral rolling roller and the second spiral rolling roller convey the balls to a position where they are separated from the upper delay plate and the lower delay plate. Then, the balls can fall into the discharge chute below the box through the circular ball holes between the first spiral rolling roller and the second spiral rolling roller for discharging.

[0025] In the bearing ball extrusion forming process of the present invention, the first spiral rolling roller and the second spiral rolling roller intercept the raw material rod into balls, and the balls are continuously shaped by the rotation of the first spiral rolling roller and the second spiral rolling roller. There will not be a circle of burrs on the bearing balls, only a few burrs, avoiding the problem of long secondary grinding time caused by a circle of burrs on the balls produced by the traditional process.

[0026] The present invention can avoid the problems of low ball forming rate and many burrs caused by the short contact time between the spiral rolling mill and the ball during extrusion, increase the forming time of the ball, make the shape of the ball closer to a spherical shape, improve the sphericity of the ball, and at the same time reduce the burrs of the ball. During secondary grinding, the grinding time is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 is a three-dimensional view of the main structure of a bearing ball extrusion forming device of the present invention Figure 1 ;

[0029] Figure 2 is a front view of the structure of a bearing ball extrusion forming device of the present invention;

[0030] Figure 3 is a left view of the structure of a bearing ball extrusion forming device of the present invention;

[0031] Figure 4 is a three-dimensional view of the main structure of a bearing ball extrusion forming device of the present invention Figure 2 ;

[0032] Figure 5 is a three-dimensional view of the main structure of a bearing ball extrusion forming device of the present invention Figure 3 ;

[0033] Figure 6 is a sectional view along the A-A direction of Figure 2 ;

[0034] Figure 7 is a sectional view along the B-B direction of Figure 3 ;

[0035] The reference numerals in the figure respectively represent:

[0036] 1. Box body 2. Discharge chute 3. Stable material guiding assembly 31. Horizontal fixing plate 32. N-shaped support plate 33. Slide bar 34. Spring 35. Pressing roller 36. N-shaped movable plate 37. Supporting roller 38. Guide cylinder 4. Delay assembly 41. Top plate 42. Upper delay plate 43. Lower delay plate 5. Extrusion forming assembly 51. First connecting shaft 52. Chain 53. Second connecting shaft 54. Driving motor 55. Sprocket 56. Third connecting shaft 57. First spiral rolling mill 58. Second spiral rolling mill. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] The present invention will be further described below with reference to the embodiments.

[0039] Embodiment 1

[0040] Please refer to the attached specification Figures 1-7 , a bearing ball extrusion molding device, comprising a box body 1, and a discharge chute 2 for discharging materials, which is fixedly connected to the lower end of the box body 1 and communicates with the bottom of the box body 1;

[0041] A stable material guiding assembly 3 for feeding the heated raw material rod is installed on the box body 1;

[0042] An extrusion molding assembly 5 for extruding the raw material rod into a ball shape is installed on the box body 1; the extrusion molding assembly 5 includes a driving assembly, a first spiral roll 57 and a second spiral roll 58, and the first spiral roll 57 and the second spiral roll 58 are rotatably connected inside the box body 1; the driving assembly is respectively connected to the first spiral roll 57 and the second spiral roll 58, and the driving assembly drives the first spiral roll 57 and the second spiral roll 58 to rotate synchronously and in the same direction;

[0043] The discharge end of the stable material guiding assembly 3 guides the raw material rod between the second spiral roll 58 and the first spiral roll 57, and the raw material rod is extruded into a spherical shape by the second spiral roll 58 and the first spiral roll 57;

[0044] The driving assembly includes a first connecting shaft 51, a chain 52, a second connecting shaft 53, a driving motor 54, a sprocket 55 and a third connecting shaft 56; the output end of the driving motor 54 is fixedly connected to the second connecting shaft 53, the other end of the second connecting shaft 53 is hinged to one end of the first connecting shaft 51, the other end of the first connecting shaft 51 passes through the side wall of the box body 1 and is fixedly connected to one end of the first spiral roller 57, the first connecting shaft 51 is rotatably connected to the side wall of the box body 1, and the other end of the first spiral roller 57 is rotatably connected to the inner wall of the box body 1; a sprocket 55 is fixedly connected to the first connecting shaft 51, the sprocket 55 is drivingly connected to another sprocket 55 through the chain 52, the other sprocket 55 is fixedly installed on the third connecting shaft 56, one end of the third connecting shaft 56 passes through the side wall of the box body 1 and is fixedly connected to one end of the second spiral roller 58, the third connecting shaft 56 is rotatably connected to the side wall of the box body 1, and the other end of the second spiral roller 58 is rotatably connected to the inner wall of the box body 1;

[0045] The driving motor 54 drives the second connecting shaft 53 to rotate, the second connecting shaft 53 drives the first connecting shaft 51 to rotate, the first connecting shaft 51 drives the first spiral roller 57 to rotate, and at the same time the first connecting shaft 51 drives the sprocket 55 thereon to rotate, the sprocket 55 drives another sprocket 55 to rotate through the chain 52, the other sprocket 55 drives the third connecting shaft 56 to rotate, and the third connecting shaft 56 drives the second spiral roller 58 to rotate, so as to realize the synchronous and co-rotational movement of the first spiral roller 57 and the second spiral roller 58;

[0046] A delay assembly 4 for preventing the balls from falling is installed on the box body 1; the delay assembly 4 includes a top plate 41, an upper delay plate 42 and a lower delay plate 43; the top plate 41 is fixedly installed on the top of the box body 1, the lower end of the top plate 41 is fixedly connected to the upper delay plate 42, the inner bottom of the box body 1 is fixedly connected to the lower delay plate 43 which is symmetrically arranged with the upper delay plate 42 up and down, the lengths of the upper delay plate 42 and the lower delay plate 43 are slightly smaller than the lengths of the first spiral roller 57 and the second spiral roller 58, and the lower end of the upper delay plate 42 and the upper end of the lower delay plate 43 are both located between the first spiral roller 57 and the second spiral roller 58;

[0047] A number of circular ball holes for discharging materials are formed between the first spiral roller 57 and the second spiral roller 58. Normally, as long as the size of the formed balls is smaller than the circular ball holes, the balls can be discharged through the circular ball holes between the first spiral roller 57 and the second spiral roller 58. However, due to the short forming time, the spherical structure of the balls cannot be guaranteed. Therefore, it is necessary to further increase the forming time of the balls. The present invention adds the delay assembly 4 for preventing the balls from falling;

[0048] The first spiral roller 57 and the second spiral roller 58 have the same length;

[0049] Preferably, the length of the left end of the upper delay plate 42 and the lower delay plate 43 from the left end of the first spiral roll 57 or the second spiral roll 58 is at least greater than the length of one circular ball hole. The length of the right end of the upper delay plate 42 and the lower delay plate 43 from the right end of the first spiral roll 57 or the second spiral roll 58 is at least greater than the length of one circular ball hole, generally not greater than three circular ball holes. The distance between the upper delay plate 42 and the lower delay plate 43 is slightly greater than the diameter of one ball.

[0050] The raw material rod is pre-heated by an intermediate frequency heating furnace, and then the raw material rod introduced through the stable material guiding assembly 3 enters the box body 1. The first spiral roll 57 and the second spiral roll 58 intercept the raw material rod into balls, and continuously shape the balls through the rotation of the first spiral roll 57 and the second spiral roll 58. During the rotation of the balls, due to the blocking of the upper delay plate 42 and the lower delay plate 43, the balls continue to be shaped between the first spiral roll 57 and the second spiral roll 58 until the first spiral roll 57 and the second spiral roll 58 transfer the balls to a position where they are separated from the upper delay plate 42 and the lower delay plate 43. Then, the balls can fall into the discharge chute 2 below the box body 1 through the circular ball holes between the first spiral roll 57 and the second spiral roll 58 for discharging. The present invention avoids the problems of low ball forming rate and many burrs caused by the short contact time between the spiral roll and the balls during extrusion, increases the forming time of the balls, makes the shape of the balls closer to a sphere, improves the sphericity rate of the balls, and reduces the burrs of the balls at the same time. During secondary grinding, the grinding time is effectively reduced.

[0051] Embodiment 2

[0052] Please refer to the attached specification Figures 2-4 On the basis of Embodiment 1, the stable material guiding assembly 3 includes a horizontal fixed plate 31, an n-shaped support plate 32, a sliding rod 33, a spring 34, a pressure roller 35, an n-shaped movable plate 36, a support roller 37 and a guiding cylinder 38. Two groups of horizontal fixed plates 31 are fixedly installed on the outer side wall of the box body 1. A plurality of groups of support rollers 37 are rotatably installed between the two horizontal fixed plates 31 at both sides. The two ends of the n-shaped support plate 32 are respectively fixedly connected to the two horizontal fixed plates 31. A sliding rod 33 is slidably connected to the n-shaped support plate 32. The lower end of the sliding rod 33 is fixedly connected to the n-shaped movable plate 36. A group of pressure rollers 35 are rotatably connected inside the n-shaped movable plate 36. A spring 34 is installed on the sliding rod 33. The spring 34 is located between the top of the n-shaped movable plate 36 and the inner top of the n-shaped support plate 32. A guiding cylinder 38 is fixedly installed on the inner side wall of the box body 1.

[0053] The feeding of the raw material rod is supported by the support roller 37 and the guiding cylinder 38, and the raw material rod is pressed by the pressure roller 35 to avoid the shaking of the raw material rod during feeding and ensure the stable feeding of the raw material rod.

[0054] First, the raw material rod is placed between the support roller 37 and the pressure roller 35, and then moves through the side wall of the box body 1 into the guide cylinder 38, and the raw material rod is guided into between the second spiral roller 58 and the first spiral roller 57 through the guide cylinder 38, so as to achieve stable feeding of the raw material rod.

[0055] Example 3

[0056] This embodiment provides a bearing ball extrusion molding process, which uses a bearing ball extrusion molding device to perform bearing ball extrusion molding, including the following steps:

[0057] Step 1: Place the raw material bar between the support roller 37 and the pressure roller 35, and send it into the guide cylinder 38 in the box body 1. The guide cylinder 38 guides the raw material bar between the second spiral roller 58 and the first spiral roller 57;

[0058] Step 2, turn on the driving motor 54, drive the second connecting shaft 53 to rotate through the driving motor 54, the second connecting shaft 53 drives the first connecting shaft 51 to rotate, the first connecting shaft 51 drives the first spiral roller 57 to rotate, and at the same time, the first connecting shaft 51 drives the sprocket 55 thereon to rotate, the sprocket 55 drives another sprocket 55 to rotate through the chain 52, the other sprocket 55 drives the third connecting shaft 56 to rotate, and the third connecting shaft 56 drives the second spiral roller 58 to rotate, so as to realize the synchronous and same-direction rotation of the first spiral roller 57 and the second spiral roller 58; the raw material rod is squeezed into a spherical ball by the second spiral roller 58 and the first spiral roller 57, and the ball is continuously shaped by the rotation of the first spiral roller 57 and the second spiral roller 58;

[0059] Step three, during the rotation process, the ball is blocked by the upper delay plate 42 and the lower delay plate 43, causing the ball to continue to be shaped between the first spiral roller 57 and the second spiral roller 58 until the first spiral roller 57 and the second spiral roller 58 transfer the ball to the point where it is separated from the upper delay plate 42 and the lower delay plate 43, and then the ball passes through the circular ball hole between the first spiral roller 57 and the second spiral roller 58 and falls into the discharging chute 2 below the box body 1 for discharging.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bearing ball extrusion forming device, comprising a box body (1), characterized in that: A discharge chute (2) for discharging, which is fixedly connected to the lower end of the box body (1) and communicates with the bottom of the box body (1), is provided; A stable material guiding component (3) for feeding the heated raw material rod is installed on the box body (1); An extrusion forming component (5) for extruding and forming the raw material rod is installed on the box body (1); the extrusion forming component (5) includes a driving component, a first spiral rolling roll (57) and a second spiral rolling roll (58), and the first spiral rolling roll (57) and the second spiral rolling roll (58) are rotatably connected inside the box body (1); the driving component is respectively connected to the first spiral rolling roll (57) and the second spiral rolling roll (58), and the driving component drives the first spiral rolling roll (57) and the second spiral rolling roll (58) to rotate synchronously and in the same direction; the discharge end of the stable material guiding component (3) guides the raw material rod between the second spiral rolling roll (58) and the first spiral rolling roll (57); A time-delay component (4) for preventing the balls from falling is installed on the box body (1); the time-delay component (4) includes a top plate (41), an upper time-delay plate (42) and a lower time-delay plate (43); the top plate (41) is fixedly installed on the top of the box body (1), the lower end of the top plate (41) is fixedly connected to the upper time-delay plate (42), the inner bottom of the box body (1) is fixedly connected to the lower time-delay plate (43) which is symmetrically arranged with the upper time-delay plate (42) up and down, and the lower end of the upper time-delay plate (42) and the upper end of the lower time-delay plate (43) are both located between the first spiral rolling roll (57) and the second spiral rolling roll (58); The stable material guiding component (3) includes a horizontal fixed plate (31), an n-shaped support plate (32), a sliding rod (33), a spring (34), a pressing roll (35), an n-shaped movable plate (36) and a support roll (37); two groups of horizontal fixed plates (31) are fixedly installed on the outer side wall of the box body (1), and several groups of support rolls (37) are rotatably installed between the two side horizontal fixed plates (31), the two ends of the n-shaped support plate (32) are respectively fixedly connected to the two horizontal fixed plates (31), a sliding rod (33) is slidably connected to the n-shaped support plate (32), the lower end of the sliding rod (33) is fixedly connected to the n-shaped movable plate (36), a group of pressing rolls (35) are rotatably connected inside the n-shaped movable plate (36), and a spring (34) is installed on the sliding rod (33), and the spring (34) is located between the top of the n-shaped movable plate (36) and the inner top of the n-shaped support plate (32).

2. The bearing ball extrusion forming equipment according to claim 1, characterized in that, The driving component includes a first connecting shaft (51), a chain (52), a second connecting shaft (53), a driving motor (54), a sprocket (55) and a third connecting shaft (56); the output end of the driving motor (54) is fixedly connected to the second connecting shaft (53), the other end of the second connecting shaft (53) is hinged to one end of the first connecting shaft (51), the other end of the first connecting shaft (51) passes through the side wall of the box body (1) and is fixedly connected to one end of the first spiral roller (57), and the first connecting shaft (51) is rotatably connected to the side wall of the box body (1); a sprocket (55) is fixedly connected to the first connecting shaft (51), the sprocket (55) is drivingly connected to another sprocket (55) through the chain (52), the other sprocket (55) is fixedly installed on the third connecting shaft (56), one end of the third connecting shaft (56) passes through the side wall of the box body (1) and is fixedly connected to one end of the second spiral roller (58), and the other end of the second spiral roller (58) is rotatably connected to the inner wall of the box body (1).

3. The bearing ball extrusion forming equipment according to claim 2, characterized in that, The other end of the first spiral roller (57) is rotatably connected to the inner wall of the box body (1), and the third connecting shaft (56) is rotatably connected to the side wall of the box body (1).

4. The bearing ball extrusion forming equipment according to claim 1, characterized in that, The lengths of the upper delay plate (42) and the lower delay plate (43) are both smaller than the lengths of the first spiral roller (57) and the second spiral roller (58).

5. The bearing ball extrusion forming equipment according to claim 4, characterized in that, The length of the left end of the upper delay plate (42) and the lower delay plate (43) from the left end of the first spiral roller (57) or the second spiral roller (58) is at least greater than the length of one circular ball hole.

6. The bearing ball extrusion forming equipment according to claim 5, characterized in that, The length of the right end of the upper delay plate (42) and the lower delay plate (43) from the right end of the first spiral roller (57) or the second spiral roller (58) is at least greater than the length of one circular ball hole.

7. The bearing ball extrusion forming equipment according to claim 6, characterized in that, The distance between the upper delay plate (42) and the lower delay plate (43) is greater than the diameter of one ball.

8. The bearing ball extrusion forming device according to claim 2, wherein A guide cylinder (38) is fixedly installed on the inner side wall of the box body (1).

9. A bearing ball extrusion forming process, characterized in that, Using the bearing ball extrusion forming device according to claim 8 for bearing ball extrusion forming, comprising the following steps: Step 1: Place the raw material rod between the support roller (37) and the pressing roller (35), and feed it into the guide cylinder (38) in the box body (1), and the guide cylinder (38) guides the raw material rod between the second spiral roller (58) and the first spiral roller (57); Step 2: Start the drive motor (54). The drive motor (54) drives the second connecting shaft (53) to rotate. The second connecting shaft (53) drives the first connecting shaft (51) to rotate. The first connecting shaft (51) drives the first spiral rolling mill (57) to rotate. At the same time, the first connecting shaft (51) drives the sprocket (55) on it to rotate. The sprocket (55) drives another sprocket (55) to rotate through the chain (52). The other sprocket (55) drives the third connecting shaft (56) to rotate. The third connecting shaft (56) drives the second spiral rolling mill (58) to rotate, so as to realize the synchronous and co-directional rotation of the first spiral rolling mill (57) and the second spiral rolling mill (58); The raw material rod is extruded into spherical balls by the second spiral rolling mill (58) and the first spiral rolling mill (57). The balls are continuously shaped by the rotation of the first spiral rolling mill (57) and the second spiral rolling mill (58). Step 3: During the rotation of the balls, due to the blocking of the upper delay plate (42) and the lower delay plate (43), the balls continue to be shaped between the first spiral rolling mill (57) and the second spiral rolling mill (58) until the first spiral rolling mill (57) and the second spiral rolling mill (58) convey the balls to be separated from the upper delay plate (42) and the lower delay plate (43). Then the balls fall into the discharge chute (2) below the box body (1) through the circular ball holes between the first spiral rolling mill (57) and the second spiral rolling mill (58) for discharging.

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