Opposite-extrusion rolling die for anti-skid groove of shaft end sheath

Abstract

The utility model relates to an opposite-extrusion rolling die for manufacturing an anti-skid groove of a shaft end sheath, which aims at solving the problems that the existing process for manufacturing the shaft end sheath adopts up-and-down folding stamping, the process needs to be carried out for many times, obvious transition traces appear on the stamping edge, the middle needs to be subjected to position conversion, the operation is troublesome, the precision is lower, and the cost is higher. The mold used based on the opposite extrusion rolling mode is designed and comprises a driving mold and a driven mold. The driving die is arranged on the rotary table, a to-be-machined shaft end sheath a is arranged on the driving die, the driven die is arranged on the horizontally-moving sliding table, and the driving die and the driven die are matched to roll the to-be-machined shaft end sheath into a target shaft end sheath b; the section of the active mold is convex, a first mounting hole is formed in the central axis, the diameter of the first part is smaller than that of the second part, and mold patterns for forming are arranged on the first part; and a second mounting hole is formed in the central axis of the driven mold, and mold patterns for forming are arranged on the peripheral surface of the driven mold.

Description

Technical Field

[0001] The utility model relates to bearing manufacturing equipment, in particular to a counter-extrusion rolling die for manufacturing anti-slip grooves on the shaft end sheath. Background Art

[0002] The shaft end sheath is a common device used in bearings. In order to prevent the rubber inside the sheath from slipping, anti-slip grooves need to be stamped on the working cylinder of the shaft end sheath. The existing process uses upper and lower mating stamping, which needs to be carried out multiple times, obvious transition marks will appear at the stamping edge, and position conversion is also required in the middle, the operation is troublesome and the accuracy is low. In order to facilitate the manufacture of the shaft end sheath and improve the accuracy, it is necessary to design a die based on the counter-extrusion rolling method to use counter-extrusion rolling instead of stamping. Summary of the Invention

[0003] The utility model is designed for the existing process of the shaft end sheath that uses upper and lower mating stamping for manufacturing, which needs to be carried out multiple times, obvious transition marks will appear at the stamping edge, and position conversion is also required in the middle, the operation is troublesome and the accuracy is low, and a die based on the counter-extrusion rolling method is designed.

[0004] The utility model provides a counter-extrusion rolling die for the anti-slip grooves of the shaft end sheath, which includes a driving die and a driven die;

[0005] The driving die is arranged on the turntable, the shaft end sheath a to be processed is arranged on the driving die, the driven die is arranged on the horizontally moving slide table, and the driving die and the driven die cooperate to roll the shaft end sheath to be processed into the target shaft end sheath b;

[0006] The cross-section of the driving die is convex, a first mounting hole is opened on the central axis, the diameter of the first part is smaller than that of the second part, and the die pattern for forming is arranged on the first part;

[0007] A second mounting hole is opened on the central axis of the driven die, and the die pattern for forming is arranged on the outer peripheral surface.

[0008] Preferably, a first counterbore is coaxially arranged at the top of the first mounting hole of the driving die, and a second counterbore is coaxially arranged at the bottom;

[0009] The diameter of the second counterbore is larger than that of the first counterbore, and the diameter of the first counterbore is larger than that of the first mounting hole;

[0010] A chamfer is arranged at the intersection edge of the first counterbore and the top surface of the driving die;

[0011] A chamfer is arranged at the intersection edge of the second counterbore and the bottom surface of the driving die;

[0012] The die pattern of the driving die includes: continuously arranged protrusions, grooves, and protrusions; wherein the diameter of the groove part is smaller than that of the first part, and the diameters of the two protrusion parts are the same.

[0013] Preferably, chamfers are provided at the junctions of the second mounting holes with the top surface and the bottom surface of the driven die.

[0014] The patterns on the driven die include: continuously arranged grooves, protrusions, and grooves; wherein the diameter of the groove part is smaller than the diameter of the driven die.

[0015] The patterns on the driving die and the driven die cooperate to process the shaft end sheath to be processed when the two dies are pressed.

[0016] Preferably, the diameter ratio of the first part of the driving die to the diameter of the driven die is 1:2.5;

[0017] The diameter ratio of the first part of the driving die to the diameter of the first mounting hole is 5.5:1;

[0018] The diameter ratio of the first part of the driving die to the diameter of the second part of the driving die is greater than or equal to 0.8;

[0019] The diameter ratio of the driven die to the diameter of the second mounting hole is 5.5:1.

[0020] The beneficial effects of the present utility model are as follows: A die applicable to the extrusion rolling process is provided, providing a new method for manufacturing the shaft end sheath. The die structure provided by the present utility model is simple and convenient for installation and use, and setting the diameter ratio is beneficial to ensuring the stability of the die and also beneficial to ensuring the stability of the product quality produced by using the die. Description of the Drawings

[0021] Figure 1 Cross-sectional view of the driving die of the present utility model;

[0022] Figure 2 Cross-sectional view of the driven die of the present utility model;

[0023] Figure 3 Finished product of the anti-slip groove of the shaft end sheath processed by the die of the present utility model;

[0024] Figure 4 Shaft end sheath to be processed by the die of the present utility model;

[0025] Figure 5 Assembly drawing when the die of the present utility model is assembled to the equipment;

[0026] In the figure: a, shaft end sheath to be processed, b, target shaft end sheath, 1, driving die, 2, driven die. Detailed Embodiments

[0027] The technical solutions of the present utility model will be further specifically described below through specific embodiments and in conjunction with the drawings. Embodiment

[0028] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, a kind of anti-slip groove extrusion rolling die for shaft end sheath includes a driving die and a driven die;

[0029] The driving die is arranged on the turntable, the shaft end sheath a to be processed is arranged on the driving die, the driven die is arranged on the horizontally moving slide table, and the driving die and the driven die cooperate to roll the shaft end sheath to be processed into the target shaft end sheath b;

[0030] The cross-section of the driving die 1 is in the shape of a convex character, a first mounting hole is provided on the central axis, the diameter of the first part is smaller than that of the second part, and the die pattern for forming is arranged on the first part;

[0031] A second mounting hole is provided on the central axis of the driven die 2, and the die pattern for forming is arranged on the outer peripheral surface.

[0032] A first counterbore is coaxially arranged at the top of the first mounting hole of the driving die 1, and a second counterbore is coaxially arranged at the bottom;

[0033] The diameter of the second counterbore is larger than that of the first counterbore, and the diameter of the first counterbore is larger than that of the first mounting hole;

[0034] A chamfer is provided at the intersection edge of the first counterbore and the top surface of the driving die;

[0035] A chamfer is provided at the intersection edge of the second counterbore and the bottom surface of the driving die;

[0036] The die pattern of the driving die includes: continuously arranged protrusions, grooves, and protrusions; the diameter of the groove part is smaller than that of the first part, and the diameters of the two protrusion parts are the same.

[0037] Chamfers are provided at the intersection of the second mounting hole and the top surface of the driven die and at the intersection with the bottom surface of the driven die;

[0038] The die pattern of the driven die 2 includes: continuously arranged grooves, protrusions, and grooves; the diameter of the groove part is smaller than the diameter of the driven die.

[0039] The diameter of the first part of the driving die 1 is 58mm, the diameter of the second part of the driving die is 69mm, the diameter ratio of the first mounting hole is 10.5mm; the diameter ratio of the driven die is 145mm; and the diameter ratio with the second mounting hole is 58mm. Embodiment

[0040] The difference between this embodiment and Embodiment 1 is that different size ratios are adopted.

[0041] The diameter of the first part of the active mold 1 is 59.2 mm, the diameter of the second part of the active mold is 69 mm, and the diameter ratio of the first mounting hole is 10.8 mm; the diameter ratio of the driven mold is 148 mm; the diameter ratio to the second mounting hole is 59.2 mm. Embodiment

[0042] The difference between this embodiment and Embodiment 1 lies in the adoption of different size ratios.

[0043] The diameter of the first part of the active mold 1 is 58 mm, the diameter of the second part of the active mold is 69 mm, and the diameter ratio of the first mounting hole is 10.5 mm; the diameter ratio of the driven mold is 148 mm; the diameter ratio to the second mounting hole is 58 mm.

[0044] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shaft end sleeve anti-slip groove extrusion rolling die, characterized in that: Including active mode and passive mode; The active die is arranged on a rotary table, the shaft end sleeve to be processed is arranged on the active die, and the driven die is arranged on a horizontally movable slide table. The active die and the driven die cooperate to roll the shaft end sleeve to be processed into a target shaft end sleeve; The active mold section is convex, a first mounting hole is opened on the central axis, the diameter of the first part is smaller than the second part, and the mold pattern for forming is arranged on the first part; A second mounting hole is provided on the central axis of the movable mold, and a molding pattern is provided on the outer peripheral surface.

2. The shaft end sleeve anti-slip groove extrusion rolling die according to claim 1, characterized in that: A first countersunk hole is coaxially arranged at the top of the first mounting hole of the active die, and a second countersunk hole is coaxially arranged at the bottom; The diameter of the second countersunk hole is larger than that of the first countersunk hole, and the diameter of the first countersunk hole is larger than that of the first mounting hole; A chamfer is provided at the interface between the first countersunk hole and the top surface of the active mold; A chamfer is provided at the interface between the second countersunk hole and the bottom surface of the active mold; The pattern of the active die includes: convexities, concave grooves, and convexities arranged continuously; The diameter of the groove portion is smaller than the diameter of the first portion, and the diameters of the two protrusion portions are the same.

3. The shaft end sleeve anti-slip groove extrusion rolling die according to claim 2, characterized in that: The second mounting hole is provided with chamfers at the junctions with the top surface of the driven mold and the bottom surface of the driven mold; The pattern of the driven die includes: continuously arranged grooves, protrusions and grooves; wherein the diameter of the groove part is smaller than the diameter of the driven die.

4. The shaft end sleeve anti-slip groove extrusion rolling die according to claim 3, characterized in that: The ratio of the diameter of the first part of the active die to the diameter of the driven die is 1:2.5; The ratio of the diameter of the first portion of the active die to the diameter of the first mounting hole is 5.5:1; The ratio of the diameter of the first part of the active die to the diameter of the second part of the active die is greater than or equal to 0.8; The ratio of the diameter of the driven die to the diameter of the second mounting hole is 5.5:1.

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