Shaping die for blind hole spherical bearing with step

Abstract

The utility model discloses a blind hole spherical bearing shaping die with steps, which comprises a female die, a lower punching component and an upper punching component, and a forming hole is formed in the upper end face of the female die; the lower punching assembly comprises a lower punching die, a core rod, a fixing rod, a first spring and a gland, the lower punching die is slidably connected to the female die, the core rod is slidably connected to the lower punching die, the lower punching die and the core rod can stretch into the forming hole, the gland is connected to the upper end of the fixing rod, the gland and the fixing rod define a limiting groove, the core rod is provided with a limiting part, and the limiting part is slidably connected to the limiting groove. The two ends of the first spring abut against the limiting part and the fixing rod correspondingly, the first spring is used for driving the core rod to ascend, the limiting part can abut against the gland or the fixing rod, and when the limiting part abuts against the gland, the upper end face of the core rod is flush with the upper end face of the female die; the upper punching assembly can stretch into the forming hole. The workpiece entering the female die is positioned through the movable core rod, and the shaping quality of the blind hole spherical bearing with the step can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic moulds, in particular to a plastic mould for a stepped blind hole spherical bearing. Background Art

[0002] After being sintered, a stepped blind hole spherical bearing made of powder metallurgy needs to be shaped by a plastic mould to improve the machining accuracy of the stepped blind hole spherical bearing. The plastic mould mainly consists of an upper punch die, a lower punch die, a female die and a core rod. The female die cooperates with the upper punch die, the lower punch die and the core rod to press and shape the workpiece. During the shaping process, the core rod needs to be aligned and inserted into the blind hole of the workpiece. The radial offset of the workpiece will affect the shaping quality. In the existing plastic mould, the core rod is fixedly arranged in the cavity of the female die, and the upper end face of the core rod is far lower than the upper end face of the female die. During the process of feeding the workpiece into the female die, only the upper punch die and the lower punch die are used to push the workpiece into the female die, and then the workpiece is sleeved on the core rod to shape the blind hole. During the process of the workpiece entering the female die, the workpiece is prone to radial position offset, so that the core rod cannot be aligned with the blind hole of the workpiece, thereby reducing the shaping accuracy and quality of the stepped blind hole spherical bearing. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to a certain extent. For this purpose, the utility model provides a plastic mould for a stepped blind hole spherical bearing, which can position the workpiece entering the female die through a movable core rod, and can reduce the possibility of position offset during the process of the workpiece entering the female die, thereby improving the shaping quality of the stepped blind hole spherical bearing.

[0004] According to an embodiment of the utility model, there is provided a plastic mould for a stepped blind hole spherical bearing, including a female die, a lower punch assembly and an upper punch assembly. A forming hole is formed in the upper end face of the female die; the lower punch assembly includes a lower punch die, a core rod, a fixing rod, a first spring and a pressing cover. The lower punch die is slidably connected to the female die, the core rod is slidably connected to the lower punch die, both the lower punch die and the core rod can extend into the forming hole. The pressing cover is connected to the upper end of the fixing rod, and a limiting groove is formed by enclosing the pressing cover and the fixing rod. The core rod is provided with a limiting portion, and the limiting portion is slidably connected to the limiting groove. Two ends of the first spring respectively abut against the limiting portion and the fixing rod. The first spring is used to drive the core rod to rise. The limiting portion can abut against the pressing cover or the fixing rod. When the limiting portion abuts against the pressing cover, the upper end face of the core rod is flush with the upper end face of the female die; the upper punch assembly can extend into the forming hole.

[0005] A sizing die for a stepped blind hole spherical bearing according to an embodiment of the present utility model has at least the following beneficial effects: In the initial state, the mandrel is driven to rise by the first spring, and the upper end surface of the mandrel is flush with the upper end surface of the female die by abutting the gland through the limiting part to limit the rising position of the mandrel. Then, the workpiece is pressed down by the upper punch assembly, so that the upper punch assembly abuts against the upper part of the workpiece, and the lower punch die abuts against the lower part of the workpiece. Since the lower punch die is slidably connected to the female die, the lower punch die can cooperate with the upper punch assembly to clamp and drive the workpiece into the forming hole. At the same time, since the mandrel is slidably connected to the lower punch die, when the lower punch die drives the workpiece to descend, the mandrel remains stationary, so that the workpiece is gradually sleeved on the mandrel to position the radial position of the workpiece until the mandrel abuts against the top wall of the blind hole of the workpiece, which can reduce the possibility of the workpiece deviating in position when entering the forming hole, and enable the mandrel to be aligned and penetrate into the blind hole of the workpiece, thereby improving the sizing quality of the workpiece. Then, the upper punch assembly continues to press down the workpiece, so that the workpiece presses the mandrel to descend, and the first spring is compressed and deformed until the limiting part abuts against the fixed rod to position the axial position of the mandrel, thereby positioning the axial position of the workpiece. The mandrel cooperates with the female die, the lower punch die and the upper punch assembly to complete the pressing and sizing of the workpiece. During demoulding, the elastic recovery of the first spring can drive the mandrel to rise and reset to wait for the positioning of the next workpiece.

[0006] According to some embodiments of the present utility model, the lower punch assembly further includes a slide rod. The fixed rod is provided with a vertical first guiding groove, the first guiding groove is communicated with the limiting groove, the slide rod is slidably connected to the first guiding groove, the first spring is sleeved on the slide rod, and both ends of the first spring respectively abut against the slide rod and the fixed rod, and the slide rod can extend into the limiting groove and abut against the mandrel.

[0007] According to some embodiments of the present utility model, the female die is provided with a second guiding groove along the axial direction, the second guiding groove is communicated with the forming hole, and the lower punch die is slidably connected to the second guiding groove.

[0008] According to some embodiments of the present utility model, the upper punch assembly includes a first upper punch die, a second upper punch die and a second spring. The second upper punch die is slidably connected to the first upper punch die. Both ends of the second spring respectively abut against the second upper punch die and the first upper punch die. The second spring is used to drive the second upper punch die to descend so as to protrude from the end of the first upper punch die.

[0009] According to some embodiments of the present utility model, the first upper punch die is provided with a third guiding groove along the axial direction. The second upper punch die is provided with an abutting part, and the abutting part is slidably connected to the third guiding groove. The abutting part can abut against the bottom wall of the third guiding groove to limit the descent of the second upper punch die.

[0010] According to some embodiments of the present utility model, the first upper punch die is provided with a limiting block, and the abutting portion can abut against the limiting block to limit the upward movement of the second upper punch die.

[0011] According to some embodiments of the present utility model, the upper punch assembly further includes a thimble, the thimble is slidably connected to the first upper punch die, the second spring is sleeved on the thimble, and both ends of the second spring respectively abut against the second upper punch die and the first upper punch die, and the thimble abuts against the second upper punch die.

[0012] According to some embodiments of the present utility model, the first upper punch die is axially provided with a fourth guiding groove, and the thimble is slidably connected to the fourth guiding groove.

[0013] According to some embodiments of the present utility model, the lower punch die is axially provided with a guiding hole, and the mandrel is slidably connected to the guiding hole.

[0014] According to some embodiments of the present utility model, the first upper punch die and the lower punch die are connected by a third spring, and the third spring is used to drive the first upper punch die and the lower punch die to move closer to each other.

[0015] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0016] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 is a cross-sectional view of the stepped blind-hole spherical bearing shaping die according to the embodiment of the present utility model in the initial state;

[0018] Figure 2 is Figure 1 a partial enlarged view of A in

[0019] Figure 3 is a cross-sectional view of the upper punch assembly of the stepped blind-hole spherical bearing shaping die according to the embodiment of the present utility model;

[0020] Figure 4 is a cross-sectional view of the female die and the lower punch assembly of the stepped blind-hole spherical bearing shaping die according to the embodiment of the present utility model;

[0021] Figure 5 is a cross-sectional view of the stepped blind-hole spherical bearing shaping die according to the embodiment of the present utility model in the pressing state;

[0022] Figure 6 isFigure 5 Partial enlarged view at B in the [specific context];

[0023] Figure 7 It is a cross-sectional view of a blind-hole spherical bearing after pressing and shaping by a shaping die for a stepped blind-hole spherical bearing according to an embodiment of the present invention.

[0024] Explanation of reference numerals:

[0025] Female die 100, forming hole 110, second guiding groove 120;

[0026] Lower punch assembly 200, lower punch die 210, guiding hole 211, mandrel 220, fixing rod 230, first guiding groove 231, first spring 240, gland 250, limiting groove 251, sliding rod 260;

[0027] Upper punch assembly 300, first upper punch die 310, third guiding groove 311, limiting block 312, fourth guiding groove 313, second upper punch die 320, abutting portion 321, second spring 330, ejector pin 340;

[0028] Third spring 400, stepped blind-hole spherical bearing 500. Detailed implementation manner

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0030] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0032] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0033] It can be understood that, referring to Figures 1 to 7 , a profiling die for a stepped blind hole spherical bearing of the present utility model includes a female die 100, a lower punch assembly 200, and an upper punch assembly 300. A forming hole 110 is formed in the upper end surface of the female die 100; the lower punch assembly 200 includes a lower punch die 210, a core rod 220, a fixing rod 230, a first spring 240, and a gland 250. The lower punch die 210 is slidably connected to the female die 100, the core rod 220 is slidably connected to the lower punch die 210, both the lower punch die 210 and the core rod 220 can extend into the forming hole 110. The gland 250 is connected to the upper end of the fixing rod 230, and a limiting groove 251 is formed by enclosing the gland 250 and the fixing rod 230. The core rod 220 is provided with a limiting portion, and the limiting portion is slidably connected to the limiting groove 251. The two ends of the first spring 240 respectively abut against the limiting portion and the fixing rod 230. The first spring 240 is used to drive the core rod 220 to rise. The limiting portion can abut against the gland 250 or the fixing rod 230. When the limiting portion abuts against the gland 250, the upper end surface of the core rod 220 is flush with the upper end surface of the female die 100; the upper punch assembly 300 can extend into the forming hole 110.

[0034] In the initial state, the core rod 220 is driven to rise by the first spring 240, and the position of the rising of the core rod 220 is limited by abutting the limiting portion against the gland 250, so that the upper end surface of the core rod 220 is flush with the upper end surface of the female die 100. Then, the upper punch assembly 300 presses down the workpiece, so that the upper punch assembly 300 abuts against the upper part of the workpiece, and the lower punch die 210 abuts against the lower part of the workpiece. Since the lower punch die 210 is slidably connected to the female die 100, the lower punch die 210 can cooperate with the upper punch assembly 300 to clamp and drive the workpiece into the forming hole 110. At the same time, since the core rod 220 is slidably connected to the lower punch die 210, during the process of the lower punch die 210 driving the workpiece to descend, the core rod 220 remains stationary, so that the workpiece is gradually sleeved on the core rod 220 to position the radial position of the workpiece until the core rod 220 abuts against the top wall of the blind hole of the workpiece, which can reduce the possibility of the workpiece deviating in position when entering the forming hole, and enable the core rod 220 to be accurately inserted into the blind hole of the workpiece, thereby improving the profiling quality of the workpiece. Then, the upper punch assembly 300 continues to press down the workpiece, so that the workpiece presses the core rod 220 to descend, and the first spring 240 is compressed and deformed until the limiting portion abuts against the fixing rod 230 to position the axial position of the core rod 220, thereby positioning the axial position of the workpiece. The core rod 220 cooperates with the female die 100, the lower punch die 210, and the upper punch assembly 300 to complete the pressing and profiling of the workpiece. During demoulding, through the elastic recovery of the first spring 240, the core rod 220 can be driven to rise and reset to wait for the positioning of the next workpiece.

[0035] In addition, by slidably connecting the limiting portion to the limiting groove 251, the lifting movement of the mandrel 220 can be guided, so as to improve the stability of the lifting movement of the mandrel 220, thereby improving the stability of the lifting and positioning of the workpiece by the mandrel 220, and further improving the shaping quality of the workpiece.

[0036] It should be noted that during use, the positions of the female die 100 and the fixed rod 230 are fixed. The upper punch assembly 300 extends into the forming hole 110 from above the female die 100, and the lower punch die 210 extends into the forming hole 110 from below the female die 100.

[0037] The workpiece can be conveyed to above the female die 100 through a movable feeding clamp, and the feeding clamp is used for pre-positioning the workpiece. When the workpiece is partially sleeved on the mandrel 220, the feeding clamp withdraws.

[0038] The upper punch assembly 300 can be driven to move up and down by driving members such as a motor, a cylinder or an oil cylinder.

[0039] During demoulding, the lower punch die 210 can be driven to rise and reset by the upper punch assembly 300, or can be driven to rise and reset by an elastic member.

[0040] A limiting member can be provided to limit the upward movement of the lower punch die 210, so that the upper end surface of the lower punch die 210 after resetting can be flush with the upper end surface of the female die 100.

[0041] It can be understood that with reference to Figure 1 and Figure 2 , the lower punch assembly 200 further includes a slide rod 260. The fixed rod 230 is provided with a vertical first guiding groove 231, and the first guiding groove 231 communicates with the limiting groove 251. The slide rod 260 is slidably connected to the first guiding groove 231. The first spring 240 is sleeved on the slide rod 260, and both ends of the first spring 240 respectively abut against the slide rod 260 and the fixed rod 230. The slide rod 260 can extend into the limiting groove 251 and abut against the mandrel 220. When the workpiece presses down the mandrel 220, the mandrel 220 abuts against and drives the slide rod 260 to slide vertically downward in the first guiding groove 231 to compress the first spring 240. When the first spring 240 elastically resumes and drives the slide rod 260 to rise, the slide rod 260 can abut against and drive the mandrel 220 to rise and reset. By guiding the lifting movement of the slide rod 260 through the first guiding groove 231, the lifting stability of the slide rod 260 can be improved, thereby improving the lifting stability of the mandrel 220, and further improving the stability of the lifting and positioning of the workpiece by the mandrel 220.

[0042] It can be understood that with reference to Figure 1 and Figure 4, the female mold 100 is axially provided with a second guiding groove 120 which communicates with the forming hole 110, and the lower punch 210 is slidably connected to the second guiding groove 120. By axially providing the second guiding groove 120 in the female mold 100 and slidably connecting the lower punch 210 to the second guiding groove 120, the lifting movement of the lower punch 210 can be guided, so as to improve the stability of the lifting movement of the lower punch 210, thereby improving the stability of the lifting movement of the workpiece and reducing the possibility of the workpiece being displaced.

[0043] It can be understood that, referring to Figures 1 to 6 , the upper punch assembly 300 includes a first upper punch 310, a second upper punch 320 and a second spring 330. The second upper punch 320 is slidably connected to the first upper punch 310. The two ends of the second spring 330 respectively abut against the second upper punch 320 and the first upper punch 310. The second spring 330 is used to drive the second upper punch 320 to descend so as to protrude from the end of the first upper punch 310. By driving the second upper punch 320 to descend by the second spring 330 so as to protrude from the end of the first upper punch 310, when the upper punch assembly 300 presses down the workpiece, the second upper punch 320 first abuts against the upper part of the workpiece and then presses down the workpiece. At the same time, the workpiece presses down the lower punch 210, so that the workpiece is gradually sleeved on the mandrel 220 until the mandrel 220 abuts against the top wall of the blind hole of the workpiece to position the radial position of the workpiece. When the mandrel 220 abuts against the top wall of the blind hole of the workpiece, the second upper punch 320 and the lower punch 210 stop moving. Then, the first upper punch 310 moves downward relative to the second upper punch 320 until the first upper punch 310 abuts against the upper part of the workpiece and presses down the workpiece. By the cooperation of the first upper punch 310, the second upper punch 320 and the mandrel 220, the workpiece is clamped and driven into the forming hole 110 to press and shape the workpiece. When demolding, the first upper punch 310, the second upper punch 320, the lower punch 210 and the mandrel 220 rise synchronously to drive the workpiece to rise until the upper end surface of the mandrel 220 is flush with the upper end surface of the female mold 100. Then the first upper punch 310 rises, and the second upper punch 320 drives the workpiece to eject from the first upper punch 310 under the elastic force of the second spring 330, so that the workpiece is separated from the first upper punch 310, which can reduce the possibility of the workpiece adhering to the first upper punch 310 when demolding. After the first upper punch 310 rises to a preset height, it can drive the second upper punch 320 to rise synchronously. At the same time, the lower punch 210 can rise and reset synchronously with the second upper punch. By clamping and ejecting the workpiece by the second upper punch 320 and the lower punch 210 from the forming hole 110, the workpiece is separated from the mandrel 220 to complete demolding, which can improve the stability of demolding.

[0044] It should be noted that the elastic force of the first spring 240 is greater than that of the second spring 330. When the second upper punching die 320 presses the workpiece downward until the mandrel 220 abuts against the top wall of the blind hole of the workpiece, the second upper punching die 320 can no longer press the workpiece downward, so that the second upper punching die 320 and the lower punching die 210 stop moving until the first upper punching die 310 abuts against the upper part of the workpiece and then presses the workpiece downward.

[0045] Referring to Figure 6 , the first upper punching die 310, the second upper punching die 320, the mandrel 220 and the female die 100 jointly enclose a shaping cavity to shape the workpiece.

[0046] Specifically, referring to Figure 3 , the first upper punching die 310 is axially provided with a third guiding groove 311, the second upper punching die 320 is provided with an abutting portion 321, the abutting portion 321 is slidably connected to the third guiding groove 311, and the abutting portion 321 can abut against the bottom wall of the third guiding groove 311 to limit the downward movement of the second upper punching die 320. By the abutting portion 321 abutting against the bottom wall of the third guiding groove 311 to limit the downward movement of the second upper punching die 320, when the first upper punching die 310 rises to a preset position, it can drive the second upper punching die 320 to rise synchronously, so that the second upper punching die 320 is separated from the workpiece. By guiding and limiting the telescopic movement of the second upper punching die 320 through the third guiding groove 311, the stability of the telescopic movement of the second upper punching die 320 can be improved.

[0047] Specifically, referring to Figure 3 , the first upper punching die 310 is provided with a limiting block 312, and the abutting portion 321 can abut against the limiting block 312 to limit the upward movement of the second upper punching die 320. When the second upper punching die 320 and the first upper punching die 310 press and shape the workpiece synchronously, by the abutting portion 321 abutting against the limiting block 312 to limit the upward movement of the second upper punching die 320 relative to the first upper punching die 310, the position of the second upper punching die 320 can be positioned, so that the second upper punching die 320 is close to the upper part of the workpiece, thereby improving the stability of pressing and shaping.

[0048] Specifically, referring to Figure 3 , the upper punching assembly 300 further includes a thimble 340, the thimble 340 is slidably connected to the first upper punching die 310, the second spring 330 is sleeved on the thimble 340, and both ends of the second spring 330 respectively abut against the second upper punching die 320 and the first upper punching die 310, and the thimble 340 abuts against the second upper punching die 320. During demoulding, the elastic force of the second spring 330 drives the thimble 340 to descend, so that the thimble 340 abuts against and drives the second upper punching die 320 to descend, so that the second upper punching die 320 protrudes from the end of the first upper punching die 310, and the workpiece can be ejected from the first upper punching die 310, thereby reducing the possibility of the workpiece adhering to the first upper punching die 310 and improving the stability of demoulding.

[0049] Specifically, referring toFigure 3 , the first upper punch die 310 is axially provided with a fourth guiding groove 313, and the ejector pin 340 is slidably connected to the fourth guiding groove 313. By guiding the lifting movement of the ejector pin 340 through the fourth guiding groove 313, the stability of the lifting movement of the ejector pin 340 can be improved, thereby improving the stability of the telescopic movement of the second upper punch die 320.

[0050] It can be understood that, referring to Figure 4 , the lower punch die 210 is axially provided with a guiding hole 211, and the mandrel 220 is slidably connected to the guiding hole 211. By guiding the mandrel 220 to slide along the axis of the lower punch die 210 through the guiding hole 211, the stability of the lifting movement of the mandrel 220 can be improved, thereby improving the stability of the lifting and positioning of the workpiece.

[0051] Specifically, referring to Figure 1 and Figure 5 , the first upper punch die 310 and the lower punch die 210 are connected by a third spring 400, and the third spring 400 is used to drive the first upper punch die 310 and the lower punch die 210 to move closer to each other. Since the first upper punch die 310 and the lower punch die 210 are connected by the third spring 400, when the first upper punch die 310 rises, the first upper punch die 310 can drive the lower punch die 210 to rise and reset synchronously, and the stability of the reset of the lower punch die 210 can be improved.

[0052] It should be noted that the elastic force of the second spring 330 is greater than the elastic force of the third spring 400. When the second upper punch die 320 presses down the workpiece, the lower punch die 210 can press down synchronously until the mandrel 220 abuts against the top wall of the blind hole of the workpiece. During the process of pressing down the workpiece by the first upper punch die 310 to a preset position, the mandrel 220 can always abut against the top wall of the blind hole of the workpiece, thereby improving the stability of the downward pressing and positioning of the workpiece.

[0053] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A blind hole spherical bearing shaping mold with steps, characterized in that: include: A female mold, wherein the upper end surface of the female mold is provided with a forming hole; A lower punch assembly, comprising a lower punch, a core rod, a fixing rod, a first spring and a pressure cover, wherein the lower punch is slidably connected to the female die, the core rod is slidably connected to the lower punch, the lower punch and the core rod can both extend into the forming hole, the pressure cover is connected to the upper end of the fixing rod, the pressure cover and the fixing rod are combined to form a limiting groove, the core rod is provided with a limiting portion, the limiting portion is slidably connected to the limiting groove, the two ends of the first spring respectively abut against the limiting portion and the fixing rod, the first spring is used to drive the core rod to rise, the limiting portion can abut against the pressure cover or the fixing rod, and when the limiting portion abuts against the pressure cover, the upper end surface of the core rod is flush with the upper end surface of the female die; An upper punch assembly is capable of extending into the forming hole.

2. The blind hole spherical bearing shaping mold with steps according to claim 1, characterized in that: The lower punch assembly also includes a sliding rod, the fixed rod is provided with a vertical first guide groove, the first guide groove is connected to the limiting groove, the sliding rod is slidably connected to the first guide groove, the first spring is sleeved on the sliding rod, and the two ends of the first spring respectively abut the sliding rod and the fixed rod, and the sliding rod can extend into the limiting groove and abut the core rod.

3. The step-blind hole spherical bearing shaping mold according to claim 1, characterized in that: The female die is provided with a second guide groove along the axial direction, the second guide groove is communicated with the forming hole, and the lower punch is slidably connected to the second guide groove.

4. The step-blind hole spherical bearing shaping mold according to claim 1, characterized in that: The upper punch assembly includes a first upper punch, a second upper punch and a second spring. The second upper punch is slidably connected to the first upper punch. The two ends of the second spring respectively abut the second upper punch and the first upper punch. The second spring is used to drive the second upper punch to descend so as to protrude from the end of the first upper punch.

5. The step-blind hole spherical bearing shaping mold according to claim 4, characterized in that: The first upper punch is provided with a third guide groove along the axial direction, and the second upper punch is provided with an abutment portion, which is slidably connected to the third guide groove and can abut against the bottom wall of the third guide groove to limit the second upper punch from descending.

6. The step-blind hole spherical bearing shaping mold according to claim 5, characterized in that: The first upper punch is provided with a limit block, and the abutting portion can abut against the limit block to limit the rising of the second upper punch.

7. The step-blind hole spherical bearing shaping mold according to claim 4, characterized in that: The upper punch assembly also includes an ejector pin, which is slidably connected to the first upper punch die. The second spring is sleeved on the ejector pin, and two ends of the second spring respectively abut against the second upper punch die and the first upper punch die. The ejector pin abuts against the second upper punch die.

8. The step-blind hole spherical bearing shaping mold according to claim 7, characterized in that: The first upper punch is provided with a fourth guide groove along the axial direction, and the ejector pin is slidably connected to the fourth guide groove.

9. The step-blind hole spherical bearing shaping mold according to claim 1, characterized in that: The lower punch is provided with a guide hole along the axial direction, and the core rod is slidably connected to the guide hole.

10. The blind hole spherical bearing shaping mold with steps according to claim 4, characterized in that: The first upper punch is connected to the lower punch via a third spring, and the third spring is used to drive the first upper punch and the lower punch to move closer to each other.

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