A device for nitriding key parts of stainless steel bearing

Abstract

The application discloses a kind of nitrogenizing device of stainless steel bearing key components, including first nitriding assembly, including first nitriding box body, first nitriding box body is fixedly connected with red copper sleeve and first discharge plate, red copper sleeve is connected with a plurality of outer rings stacked together along the axis direction of red copper sleeve in, first nitriding box body is rotatably connected with nitriding sleeve and the metal core rod that is arranged relative to first discharge plate, nitriding sleeve that extends into red copper sleeve is connected with a plurality of metal sliding blocks, a plurality of first nitriding notches are arranged on the side of metal sliding block relative to the inner edge of outer ring, a plurality of inner rings are connected on metal core rod, a plurality of second nitriding notches are arranged on first discharge plate;Second nitriding assembly, including second nitriding box body, the inner wall of one end of second nitriding box body is connected with second discharge plate via first insulating block, and insulating slide rod that is used for placing roller and is subjected to reciprocating linear motion is further connected in second nitriding box body;The application carries out nitriding to the key components of stainless steel bearing, and improves surface hardness.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a nitriding device for a key component of a stainless steel bearing. Background Technology

[0002] Bearings are used in many mechanical devices. Currently, ferrous metals are frequently used to manufacture bearings. However, ferrous metal bearings are easily corroded in humid and aquatic environments. To address this corrosion issue, corrosion-resistant bearings are needed. 304 stainless steel is a commonly used stainless steel, inexpensive and readily available, but its low surface hardness and poor wear resistance make it unsuitable for bearings. Nitriding the inner diameter surface of key components in bearings made from this material increases surface hardness, overcoming its low surface hardness and poor wear resistance, making it a better choice for corrosion-resistant bearings. This invention addresses the corrosion resistance problem of 304 stainless steel bearings by nitriding the inner ring outer diameter, outer ring inner diameter, and roller outer ring. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the processing of the above and / or existing key components of bearings, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide a nitriding device for key components of stainless steel bearings. This invention solves the problem of poor corrosion resistance in bearings made of 304 stainless steel. This invention can nitrid the outer diameter of the inner ring, the inner diameter of the outer ring, and the outer ring of the rollers to improve the surface hardness of 304 stainless steel bearings, thereby increasing wear resistance and deformation resistance.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a nitriding device for a key component of a stainless steel bearing, the key component including an outer ring and an inner ring, wherein a plurality of rollers are arranged between the outer and inner rings, and the outer periphery of the rollers has an annular groove; the nitriding device includes,

[0007] The first nitriding assembly includes a first nitriding chamber, a first nitrogen storage tank disposed outside the first nitriding chamber, and a first vacuum pump. A copper sleeve connected to a first power line and a first discharge plate connected to a second power line are fixedly connected inside the first nitriding chamber. Several outer rings stacked together along the axis of the copper sleeve are connected inside the copper sleeve. A nitriding sleeve connected to a third power line and a metal core rod connected to a fourth power line and positioned opposite the first discharge plate are rotatably connected inside the first nitriding chamber. Several metal sliders are connected to the nitriding sleeve extending into the copper sleeve. Several first nitriding notches are arranged on one side of the metal sliders opposite the inner edge of the outer rings. The metal sliders between adjacent first nitriding notches and the two metal sliders with outward-facing first nitriding notches at both ends of the axial direction are respectively aligned with the inner ring grooves of the corresponding outer rings. The metal core rod is connected to several inner rings stacked together along the axis of the metal core rod. Several second nitriding notches are arranged on the first discharge plate. The first discharge plate between two adjacent second nitriding notches and the first discharge plate with two second nitriding notches facing outward at both ends of the axial direction are respectively aligned with the outer ring groove of the corresponding inner ring. The electrodes of the first power line and the third power line are opposite, and the electrodes of the second power line and the fourth power line are opposite. A first vent pipe and a first vacuum pipe are fixedly connected to the outside of the first nitriding box. One end of the first vent pipe and one end of the first vacuum control valve are respectively connected to the first vent pipe and the first vacuum pipe. The other end of the first vacuum control valve is connected to the first vacuum pump, and the other end of the first vent valve is connected to the first nitrogen storage tank.

[0008] The second nitriding assembly includes a second nitriding chamber, a second nitrogen storage tank disposed outside the second nitriding chamber, and a second vacuum pump. A first insulating block is fixedly connected to the inner wall of one end of the second nitriding chamber. A second discharge plate connected to a fifth power line is fixedly connected to the side of the first insulating block away from the inner wall of the second nitriding chamber. An insulating slide rod that makes reciprocating linear motion and is disposed relative to the second discharge plate is also connected inside the second nitriding chamber. Several connecting grooves for placing rollers are arranged on the side of the insulating slide rod opposite to the second discharge plate. The rollers can roll in the connecting grooves. A second vent pipe and a second vacuum pipe are fixedly connected to the outside of the second nitriding chamber. One end of a second vent valve and one end of a second vacuum control valve are respectively connected to the second vent pipe and the second vacuum pipe. The other end of the second vacuum control valve is connected to the second vacuum pump, and the other end of the second vent valve is connected to the second nitrogen storage tank.

[0009] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, wherein: a second insulating block is fixedly connected to the inner wall of the other end of the second nitriding box; a discharge block is fixedly connected to one end of the second insulating block relative to the insulating slide rod; a limiting groove is opened at one end of the discharge block relative to the second discharge plate; rollers at the annular groove are inserted into the connecting groove; rollers on both sides of the annular groove are respectively outside the connecting groove; and the axial sides of the rollers are respectively attached to the discharge blocks on both sides of the limiting groove.

[0010] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, the nitriding sleeve has a plurality of connecting holes arranged along the axial direction of the nitriding sleeve on its outer periphery, and a plurality of connecting countersunk holes arranged along the axial direction of the nitriding sleeve on its inner edge. A partition is fixed on the nitriding sleeve between adjacent connecting countersunk holes. A guide hole communicating with the corresponding connecting hole is opened on the partition. A threaded hole is opened on the partition at the side end of the guide hole. The metal slider just passes through the guide hole and the connecting hole and then abuts against the inner side of the partition. The metal slider is pressed against the partition by screwing the first fixing bolt into the threaded hole.

[0011] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, wherein: an insulating plate is fixedly connected to the inner side of the first nitriding chamber, an energized sleeve is fixedly connected to the end of the insulating plate away from the inner wall of the first nitriding chamber, the third power line is connected to the energized sleeve, and a copper sleeve is fixed inside the energized sleeve.

[0012] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, the inner side of the copper sleeve is threaded with a threaded ring, and the threaded ring presses the outer rings stacked sequentially in the axial direction onto the copper sleeve.

[0013] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, wherein: an insulating fixing plate is fixedly connected to the inner side of the first nitriding chamber, a copper fixing plate is fixedly connected to the insulating fixing plate, a slot is opened in the axial direction of the first discharge plate, the end of the copper fixing plate away from the insulating fixing plate can be inserted into the first discharge plate along the slot, a screw hole communicating with the slot is opened on the first discharge plate, and a second fixing bolt is screwed into the screw hole to press the copper fixing plate tightly onto the first discharge plate.

[0014] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, wherein: a first motor and a second motor are fixedly connected to the outside of the first nitriding housing, and a first output shaft and a second output shaft extending into the first nitriding housing are respectively connected to the first motor and the second motor, the first output shaft is fixedly connected to the nitriding sleeve, and the second output shaft is fixedly connected to the metal core rod.

[0015] As a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, wherein: a first ring and a second ring are fixedly connected inside the first nitriding chamber, the first ring and the second ring are respectively connected to a third power line and a fourth power line, the first ring has an arc-shaped first groove on one side opposite to the nitriding sleeve, and the second ring has an arc-shaped second groove on one end opposite to the metal core rod, the first ring is attached to the outside of the nitriding sleeve through the first groove, and the second ring is attached to the outside of the metal core rod through the second groove.

[0016] In a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, the second discharge plate has a plurality of toothed grooves arranged on the side away from the first insulating block.

[0017] In a preferred embodiment of the nitriding device for a key component of a stainless steel bearing in this invention, a linear actuator is fixedly connected to the outside of the second nitriding chamber, and a telescopic rod that reciprocates linearly in the horizontal direction is connected to the linear actuator. The insulating slide rod is fixedly connected to one end of the telescopic rod that extends into the second nitriding chamber.

[0018] Compared with the prior art, the present invention has the following technical effects: the present invention can nitrid the outer surface of the inner ring at the outer ring groove, the inner surface of the outer ring at the inner ring groove, and the outer ring of the roller, thereby improving the surface hardness of bearings made of 304 stainless steel; it can be applied to the nitriding of key bearing components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a front view of the first nitriding component in this invention.

[0021] Figure 2 This is a top view of the first nitriding component in this invention.

[0022] Figure 3 for Figure 1 View from point AA.

[0023] Figure 4 for Figure 2 View from point BB.

[0024] Figure 5 for Figure 3 The view at CC.

[0025] Figure 6 for Figure 3 The view at point DD.

[0026] Figure 7 This is a front view of the second nitriding component in this invention.

[0027] Figure 8 This is a top view of the second nitriding component in this invention.

[0028] Figure 9 for Figure 7 The view at EE.

[0029] Figure 10 for Figure 8 The view at FF in the middle.

[0030] In the diagram, 100 is the first nitriding component, 101 is the first nitriding chamber, 102 is the nitriding sleeve, 102a is the connecting hole, 102b is the connecting countersunk hole, 102c is the partition, 102c-1 is the guide hole, 102c-2 is the threaded hole, 103 is the first door, 104 is the power sleeve, 105 is the copper sleeve, 106 is the threaded ring, 107 is the first vent valve, 108 is the nut, 109 is the first motor, 110 is the first vacuum pump, 111 is the second motor, and 112 is the first nitrogen storage tank. 113 First vent valve, 114 Metal slider, 114a First nitrided notch, 115 Insulating plate, 116 First power line, 117 Third power line, 118 First ring, 118a First groove, 119 First output shaft, 120 First vacuum control valve, 121 First vent pipe, 122 Second output shaft, 123 First vacuum tube, 124 Fourth power line, 125 Second ring, 126 Metal core rod, 127 Insulating fixing plate, 1 28 Second power cord, 129 First discharge board, 129a Second nitriding notch, 129b Slot, 130 Copper fixing plate, 131 First fixing bolt, 132 Second support block, 133 First support block, 134 First support bearing, 135 Second support bearing, 200 Second nitriding assembly, 201 Second nitriding housing, 202 Discharge block, 202a Limiting groove, 203 Insulating slide bar, 203a Connecting groove, 204 Second door, 2 05 Second discharge plate, 205a toothed groove, 206 First insulating block, 207 Second venting valve, 208 Second vacuum tube, 209 Second vacuum control valve, 210 Second vacuum pump, 211 Second nitrogen storage tank, 212 Second venting valve, 213 Second venting pipe, 214 Linear actuator, 215 Telescopic rod, 216 Second insulating block, 217 Fifth power line, 218 Sixth power line, 300 outer ring, 400 inner ring, 500 roller. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] Reference Figures 1-3 and Figures 6-10 This embodiment provides a nitriding device for key components of stainless steel bearings, which can nitrid the inner ring 400, outer ring 300 and rollers 500 to improve the surface hardness of the bearing.

[0036] A nitriding device for a key component of a stainless steel bearing, the key component including an outer ring 300 and an inner ring 400, a plurality of rollers 500 arranged between the outer circumferences of the outer ring 300 and the inner ring 400, the outer circumference of the rollers 500 having an annular groove; the nitriding device includes a first nitriding component 100 for nitriding the inner surface of the outer ring 300 and the outer surface of the inner ring 400 and a second nitriding component 200 for nitriding the outer ring 300 of the rollers 500.

[0037] Specifically, the first nitriding assembly 100 includes a first nitriding chamber 101, a first nitrogen storage tank 112 disposed outside the first nitriding chamber 101, and a first vacuum pump 110. A copper sleeve 105 connected to a first power line 116 and a first discharge plate 129 connected to a second power line 128 are fixedly connected inside the first nitriding chamber 101. Several outer rings 300 stacked along the axis of the copper sleeve 105 are connected inside the copper sleeve 105. A nitriding sleeve 102 connected to a third power line 117 and a fourth power line 128 are rotatably connected inside the first nitriding chamber 101. 4. A number of metal sliders 114 are connected to the metal core rod 126, which is positioned relative to the first discharge plate 129, and the nitrided sleeve 102, which extends into the copper sleeve 105. Several first nitriding notches 114a are arranged on the side of the metal sliders 114 opposite to the inner edge of the outer ring 300. The metal sliders 114 between adjacent first nitriding notches 114a and the two metal sliders 114 with the two first nitriding notches 114a facing outward at both ends of the axial direction are respectively aligned with the inner ring grooves of the corresponding outer ring 300. Several inner rings stacked together along the axial direction of the metal core rod 126 are connected to the metal core rod 126. 400, a plurality of second nitriding notches 129a are arranged on the first discharge plate 129, the first discharge plates 129 between two adjacent second nitriding notches 129a and the two first discharge plates 129 with the two second nitriding notches 129a facing outward at both ends of the axial direction are respectively aligned with the outer ring grooves of the corresponding inner ring 400, the inner side of the copper sleeve 105 is threaded with a threaded ring 106, the threaded ring 106 presses the outer rings 300 stacked in the axial direction onto the copper sleeve 105, the electrodes of the first power line 116 and the third power line 117 are opposite, the second power line 128 and the fourth The electrodes of the power cord 124 are opposite. The first vent pipe 121 and the first vacuum pipe 123 are fixedly connected to the outside of the first nitriding chamber 101. One end of the first vent valve 113 and one end of the first vacuum control valve 120 are respectively connected to the first vent pipe 121 and the first vacuum pipe 123. The other end of the first vacuum control valve 120 is connected to the first vacuum pump 110. The other end of the first vent valve 113 is connected to the first nitrogen storage tank 112. The outside of the first nitriding chamber 101 is also connected to the first vent valve 107, which communicates with the inner cavity of the first nitriding chamber 101.

[0038] In this application, the front end of the first nitriding chamber 101 is connected to a first door 103 that can be opened and closed. The connection structure between the first door 103 and the first nitriding chamber 101 is prior art and will not be described in detail in this application. The first power line 116 and the second first power line 116 are both connected to the cathode of the first power supply, and the third first power line 116 and the fourth first power line 116 are both connected to the anode of the first power supply. A first support block 133 and a second support block 132 are fixedly connected inside the first nitriding chamber 101. A first support bearing 134 and a second support bearing 135 are respectively connected to the first support block 133 and the second support block 132. The nitriding sleeve 102 is rotatably connected to the first support block 133 via the first support bearing 134, and the metal core rod 126 is rotatably connected to the second support block 132 via the second support bearing 135. Before nitriding, the first door 103 is in the open state, allowing the outer... The outer ring 300 is inserted into the inner ring 400 of the copper sleeve 105 from front to back. After stacking a number of outer rings 300 into the copper sleeve 105, the threaded ring 106 is screwed into the front end of the inner ring 400 of the copper sleeve 105, so that the outer rings 300 are pressed into the copper sleeve 105. At this time, the metal sliders 114 between adjacent first nitriding notches 114a and the two metal sliders 114 with the first nitriding notches 114a facing outward at both ends of the axis are aligned with the inner ring groove of the corresponding outer ring 300. The inner rings 400 are fitted onto the metal core rod 126 from front to back. The inner ring 400 at the last end abuts against the step of the metal slider 114. After the corresponding number of inner rings 400 are stacked onto the metal core rod 126, the limiting nut 108 is screwed to the front of the metal core rod 126, so that the inner rings 400 are tightly packed together and will not move back and forth.Before nitriding, the first door 103 is closed, the first vacuum control valve 120 is opened, and the first vacuum pump 110 operates to evacuate the first nitriding chamber 101. Once the required vacuum is reached, the first vacuum control valve 120 and the vacuum pump are closed, and the first vent valve 113 is opened, allowing nitrogen from the first nitrogen storage tank 112 to be released into the first nitriding chamber 101. This causes the nitriding sleeve 102 and the metal core rod 126 to rotate, and the metal slider 114 moves along several bearing outer rings 300°. The inner surface of the nitriding sleeve 102 rotates, connecting the first power supply. Several bosses on the nitriding sleeve 102 discharge into the inner ring groove of the outer ring 300. A DC voltage of several hundred volts is applied between the bosses on the nitriding sleeve 102 and the inner ring groove of the outer ring 300. Simultaneously, several bosses on the first discharge plate 129 discharge into the corresponding outer ring groove of the inner ring 400. A DC voltage of several hundred volts is applied between the bosses on the first discharge plate 129 and the inner ring groove of the inner ring 400. Nitrogen in the first nitriding chamber 101... The gas undergoes a glow discharge to form positive ions, which move toward the working surface. In an instant, the cathode voltage drops sharply, causing the positive ions to rush toward the cathode surface at high speed, converting kinetic energy into gas energy. This causes the surface temperature of the workpiece to rise. Due to the impact of nitrogen ions, elements such as iron, carbon, and oxygen are ejected from the workpiece surface and combine with nitrogen ions to form FeN. As a result, iron nitride is gradually adsorbed onto the workpiece, resulting in nitriding. This causes the surfaces of the inner ring groove of the outer ring 300 and the outer ring groove of the inner ring 400 to come into contact and discharge, nitriding. This stops the rotation of the nitriding sleeve 102 and the metal core rod 126. The first power supply is turned off, the vacuum pump, the first vacuum control valve 120, and the first vent valve 113 are shut off, and the first vent valve 107 is opened to balance the gas pressure inside and outside the first nitriding chamber 101. The first vent valve 107 is then closed, the first door 103 is opened, the threaded ring 106 and the nut 108 are unscrewed, and several inner rings 400 and outer rings 300 are taken out to prepare for the nitriding of the next batch of inner rings 400 and outer rings 300. ;

[0039] Specifically, the second nitriding assembly 200 includes a second nitriding chamber 201, a second nitrogen storage tank 211 disposed outside the second nitriding chamber 201, and a second vacuum pump 210. A first insulating block 206 is fixedly connected to the inner wall of one end of the second nitriding chamber 201. A second discharge plate 205 connected to a fifth power line 217 is fixedly connected to the side of the first insulating block 206 away from the inner wall of the second nitriding chamber 201. An insulating slide rod 203 that performs reciprocating linear motion and is disposed relative to the second discharge plate 205 is also connected inside the second nitriding chamber 201. On one side of the rod 203 opposite to the second discharge plate 205, there are several connecting grooves 203a for placing rollers 500. The rollers 500 can roll within the connecting grooves 203a. A second insulating block 216 is fixedly connected to the inner wall of the other end of the second nitriding box 201. A discharge block 202 is fixedly connected to one end of the second insulating block 216 opposite to the insulating slide rod 203. The discharge block 202 is connected to the sixth power line 218. A limiting groove 202a is opened on one end of the discharge block 202 opposite to the second discharge plate 205. The rollers 500 at the annular groove are inserted into the connecting groove. Inside the settling tank 203a, rollers 500 on both sides of the annular groove are connected to the outside of the settling tank 203a. The axial sides of the rollers 500 are respectively attached to the discharge blocks 202 on both sides of the limiting settling tank 202a. The second discharge plate 205 has several toothed grooves 205a arranged on the side away from the first insulating block 206. The second nitriding box 201 is fixedly connected to the outside of the second vent pipe 213 and the second vacuum pipe 208. The second vent pipe 213 and the second vacuum pipe 208 are respectively connected to one end of the second vent valve 212 and one end of the second vacuum control valve 209. The other end of the second vacuum control valve 209 is connected to the second vacuum pump 210, and the other end of the second vent valve 212 is connected to the second nitrogen storage tank 211. A second vent valve 207 is also provided outside the second nitriding chamber 201. A second vent pipe is connected between the second vent valve 207 and the second nitriding chamber 201. The second vent pipe is connected to the inner cavity of the second nitriding chamber 201. A second vent control valve is connected to the second vent pipe. A second vent valve 207 connected to the inner cavity of the second nitriding chamber 201 is fixedly connected to the outside of the second nitriding chamber 201.

[0040] The fifth power line 217 is connected to the cathode of the second power supply, and the sixth power line 218 is connected to the anode of the second power supply; the front end of the first nitriding chamber 101 is connected to a second door 204 that can be opened and closed. The connection structure between the second door 204 and the second nitriding chamber 201 is prior art and will not be described in detail in this application; a plurality of rollers 500 are placed from top to bottom into the limiting groove 202a of the discharge block 202, and the plurality of rollers 500 are inserted one by one into the connecting grooves of the insulating slide rod 203 through the annular groove. At slot 203a; close the second door 204, open the second vacuum control valve 209, and the second vacuum pump 210 operates to evacuate the second nitriding chamber 201. Once the required vacuum is reached, close the second vacuum control valve 209 and the vacuum pump, open the second vent valve 212, and the nitrogen in the second nitrogen storage tank 211 is discharged into the second nitriding chamber. The second power supply is energized, causing the insulating slide rod 203 to reciprocate linearly. The insulating slide rod 203 drives the stainless steel roller 500 to reciprocate linearly. Simultaneously, the workpiece rolls within the connecting trough 203a. A DC voltage of several hundred volts is applied between the second discharge plate 205 and the discharge block 202. Nitrogen gas within the second nitriding chamber 201 undergoes a glow discharge, generating positive ions that move towards the working surface. In an instant, the cathode voltage drops sharply, causing the positive ions to rush towards the cathode surface at high speed, converting kinetic energy into gas energy. This raises the surface temperature of the workpiece. The impact of the nitrogen ions ejects elements such as iron, carbon, and oxygen from the workpiece surface, which combine with the nitrogen ions to form FeN. The iron nitride is gradually adsorbed onto the workpiece, resulting in nitriding. This causes the surface of the outer ring 300 of the roller 500 to be nitrided after contact discharge, stopping the movement of the insulating slide bar 203. The second power supply is then cut off, the vacuum pump, the second vacuum control valve 209, and the second vent valve 212 are shut off, and the second vent valve 207 is opened to balance the air pressure inside and outside the second nitriding chamber 201. The second vent valve 207 is then closed, the second door 204 is opened, and several rollers 500 are removed to prepare for the nitriding of the next batch of rollers 500.

[0041] The above operation process achieves nitriding of the inner surface of the inner ring 400 in the inner ring groove, nitriding of the outer surface of the outer ring 300 in the outer ring groove, and nitriding of the outer circumference of the roller 500, thereby improving the surface hardness of the stainless steel bearing.

[0042] Example 2

[0043] Reference Figures 3-5 This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that it provides a nitriding device for a key component of a stainless steel bearing, which can further facilitate the connection between the metal slider 114 and the nitriding sleeve 102, and improve the reliability of discharge transmission.

[0044] Specifically, the front end of the nitriding sleeve 102 has several connecting holes 102a arranged along the axial direction of the nitriding sleeve 102, and the inner edge of the nitriding sleeve 102 has several connecting countersunk holes 102b arranged along the axial direction of the nitriding sleeve 102. A partition 102c is fixed on the nitriding sleeve 102 between two adjacent connecting countersunk holes 102b in the circumferential direction. The partition has a guide hole 102c-1 communicating with the corresponding connecting hole 102a. A threaded hole 102c-2 is opened on the partition 102c at the side end of the guide hole 102c-1. The metal slider 114 passes through the guide hole 102c-1 and the connecting hole 102a and then abuts against the inside of the partition 102c. The first fixing bolt 131 is screwed into the threaded hole 102c-2 to press the metal slider 114 onto the partition 102c. An insulating plate 115 is fixedly connected to the inside of the first nitriding box 101. An electric sleeve 104 is fixedly connected to the end of the insulating plate 115 away from the inner wall of the first nitriding box 101. The first power line 116 is connected to the electric sleeve 104. The copper sleeve 105 is fixed inside the electric sleeve 104.

[0045] When installing the metal slider 114, insert it sequentially into the nitriding sleeve 102 along the guide hole 102c-1 and the connecting hole 102a on the partition 102c. The metal slider 114 and the nitriding sleeve 102 should be in tight contact. Use the first fixing bolt 131 to screw into the threaded hole 102c-2 to press the metal slider 114 firmly onto the partition 102c, ensuring a tight connection between the metal slider 114 and the nitriding sleeve 102, preventing any movement. When energized, the metal slider 114 is also energized. The copper sleeve 105 and the energized sleeve 104 are fixedly connected. When the energized sleeve 104 is energized, the copper sleeve 105 is also energized. At the same time, the boss end face of the metal slider 114 is aligned with the surface of the outer ring 300 at each inner ring groove. The outer ring 300 is also attached to the inner edge of the copper sleeve 105, which further reliably realizes the discharge between the two poles of the copper sleeve 105 and the metal slider 114, and realizes the nitriding of the surface where the inner ring groove of the outer ring 300 is located.

[0046] Specifically, an insulating fixing plate 127 is fixedly connected to the inner side of the first nitriding chamber 101. A copper fixing plate 130 is fixedly connected to the insulating fixing plate 127. A slot 129b is opened in the axial direction of the first discharge plate 129. The end of the copper fixing plate 130 away from the insulating fixing plate 127 can be inserted into the first discharge plate 129 along the slot 129b. A screw hole communicating with the slot 129b is opened on the first discharge plate 129. A second fixing bolt is screwed into the screw hole to press the copper fixing plate 130 tightly onto the first discharge plate 129. A first ring 118 and a second ring 125 are fixedly connected inside the nitriding chamber 101. The first ring 118 and the second ring 125 are respectively connected to the third power line 117 and the fourth power line 124. The first ring 118 has an arc-shaped first groove 118a on one side opposite to the nitriding sleeve 102, and the second ring 125 has an arc-shaped second groove on one end opposite to the metal core rod 126. The first ring 118 is attached to the outside of the nitriding sleeve 102 through the first groove 118a, and the second ring 125 is attached to the outside of the metal core rod 126 through the second groove.

[0047] The connection between the copper fixing plate 130 and the first discharge plate 129 is convenient. When the copper fixing plate 130 is energized, the first discharge plate 129 is also energized. The nitriding sleeve 102 is rotatably connected to the first ring 118 via the first groove 118a. The first ring 118 provides rear support for the nitriding sleeve 102 and transmits electricity to the nitriding sleeve 102. The metal core rod 126 is rotatably connected to the second ring 125 via the second groove. The second ring 125 provides rear rotational support for the metal core rod 126 and transmits electricity to the metal core rod 126.

[0048] Example 3

[0049] Reference Figure 3 and Figures 8-10 The difference from embodiments 1 and 2 is that this embodiment provides a device for maintaining template 1.

[0050] Specifically, a first motor 109 and a second motor 111 are fixedly connected to the outside of the first nitriding chamber 101. A first output shaft 119 and a second output shaft 122 extending into the first nitriding chamber 101 are respectively connected to the first motor 109 and the second motor 111. A first insulating sleeve is fixedly connected to the first output shaft 119. A nitriding sleeve 102 is fixedly connected to the first insulating sleeve. A second insulating sleeve is fixedly connected to the second output shaft 122. A metal core rod 126 is fixedly connected to the second insulating sleeve.

[0051] When nitriding the inner ring 400 and the outer ring 300, the first motor 109 and the second motor 111 are activated, and the first output shaft 119 and the second output shaft 122 rotate. The first output shaft 119 drives each metal slider 114 to rotate via the nitriding sleeve 102, thereby achieving uniform nitriding of the inner surface of the outer ring 300 in the inner ring groove. The second output shaft 122 drives each inner ring 400 to rotate via the metal mandrel 126, thereby achieving uniform nitriding of the outer surface of the inner ring 400 in the outer ring groove and improving the nitriding effect.

[0052] Specifically, a linear actuator 214 is fixedly connected to the outside of the second nitriding chamber 201. A telescopic rod 215 that makes reciprocating linear motion in the horizontal direction is connected to the linear actuator 214. An insulating slide rod 203 is fixedly connected to one end of the telescopic rod 215 that extends into the second nitriding chamber 201.

[0053] When the roller 500 is nitrided, the linear actuator 214 is activated, the telescopic rod 215 performs reciprocating linear motion, the telescopic rod 215 drives the insulating slide rod 203 to perform reciprocating linear motion, the insulating slide rod 203 drives several balls to perform reciprocating linear motion, and at the same time the roller 500 can roll on the insulating slide rod 203 at the connecting groove 203a, so that the outer surface of the roller 500 can be nitrided.

[0054] All directions mentioned in this application are based on the front view. The direction perpendicular to the paper is the front-back direction, and the direction perpendicular to the front-back direction and horizontal is the left-right direction.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A nitrogenizing device for key components of a stainless steel bearing, the key components comprising an outer ring (300) and an inner ring (400), the outer ring (300) and the inner ring (400) having a plurality of rollers (500) arranged therebetween, the rollers (500) having annular grooves on their outer periphery; the nitrogenizing device comprising, a first nitrogenizing assembly (100) comprising a first nitrogenizing box (101), a first nitrogen storage tank (112) arranged outside the first nitrogenizing box (101), and a first vacuum pump (110), the first nitrogenizing box (101) having a copper sleeve (105) connected to a first power line (116) and a first discharge plate (129) connected to a second power line (128) fixedly connected therein, the copper sleeve (105) having a plurality of outer rings (300) stacked together along the axial direction of the copper sleeve (105) connected therein, the first nitrogenizing box (101) having a nitrogenizing sleeve (102) connected to a third power line (117) and a metal core rod (126) connected to a fourth power line (124) and arranged opposite to the first discharge plate (129) rotatably connected therein, the nitrogenizing sleeve (102) extending into the copper sleeve (105) having a plurality of metal sliding blocks (114) connected thereto, the metal sliding blocks (114) having a plurality of first nitrogenizing notches (114a) arranged on one side of the inner edge of the outer ring (300) opposite to each other, the metal sliding blocks (114) between adjacent first nitrogenizing notches (114a) and the metal sliding blocks (114) outward of the two first nitrogenizing notches (114a) at the axial ends being aligned with the inner ring grooves of the corresponding outer ring (300) one by one, the metal core rod (126) having a plurality of inner rings (400) stacked together along the axial direction of the metal core rod (126) connected thereto, the first discharge plate (129) having a plurality of second nitrogenizing notches (129a) arranged thereon, the first discharge plate (129) between adjacent second nitrogenizing notches (129a) and the first discharge plate (129) outward of the two second nitrogenizing notches (129a) at the axial ends being aligned with the outer ring grooves of the corresponding inner ring (400) one by one, the electrodes of the first power line (116) and the third power line (117) being opposite to each other, the electrodes of the second power line (128) and the fourth power line (124) being opposite to each other, the first nitrogenizing box (101) having a first air pipe (121) and a first vacuum pipe (123) fixedly connected to the outside thereof, one end of a first air valve (113) and one end of a first vacuum control valve (120) being connected to the first air pipe (121) and the first vacuum pipe (123) respectively, the other end of the first vacuum control valve (120) being connected to the first vacuum pump (110), and the other end of the first air valve (113) being connected to the first nitrogen storage tank (112). The second nitriding assembly (200) comprises a second nitriding box (201), a second nitrogen storage tank (211) and a second vacuum pump (210) arranged outside the second nitriding box (201), the inner wall of one end of the second nitriding box (201) is fixedly connected with a first insulating block (206), the side of the first insulating block (206) away from the inner wall of the second nitriding box (201) is fixedly connected with a second discharge plate (205) connected with a fifth power line (217), the second nitriding box (201) is also connected with an insulating slide rod (203) arranged opposite to the second discharge plate (205) and capable of making reciprocating linear motion, the side of the insulating slide rod (203) opposite to the second discharge plate (205) is arranged with a plurality of connecting grooves (203a) for placing rollers (500), the rollers (500) can roll in the connecting grooves (203a), the outer side of the second nitriding box (201) is fixedly connected with a second air pipe (213) and a second vacuum pipe (208), one end of the second air pipe (213) and one end of the second vacuum pipe (208) are respectively connected with a second air valve (212) and a second vacuum control valve (209), the other end of the second vacuum control valve (209) is connected with the second vacuum pump (210), and the other end of the second air valve (212) is connected with the second nitrogen storage tank (211).

2. A device for nitriding critical components of stainless steel bearings as claimed in claim 1, wherein: The inner wall of the other end of the second nitriding box (201) is fixedly connected with a second insulating block (216), one end of the second insulating block (216) opposite to the insulating slide rod (203) is fixedly connected with a discharge block (202), and the end of the discharge block (202) opposite to the second discharge plate (205) is provided with a limiting groove (202a), the rollers (500) at the annular groove are inserted into the connecting grooves (203a), the rollers (500) on the two sides of the annular groove in the axial direction are arranged outside the connecting grooves (203a), and the two sides of the rollers (500) in the axial direction are respectively attached to the discharge block (202) on the two sides of the limiting groove (202a).

3. A device for nitriding key components of stainless steel bearings according to claim 1 or 2, characterized in that: The outer periphery of the nitriding sleeve (102) is arranged with a plurality of connecting holes (102a) arranged along the axis direction of the nitriding sleeve (102), the inner edge of the nitriding sleeve (102) is arranged with a plurality of connecting counterbores (102b) arranged along the axis direction of the nitriding sleeve (102), the nitriding sleeve (102) between adjacent connecting counterbores (102b) is fixedly connected with a partition (102c), the partition is provided with a guide hole (102c-1) in communication with the corresponding connecting hole (102a), the partition (102c) at the side end of the guide hole (102c-1) is provided with a threaded hole (102c-2), the metal slide block (114) is just pressed against the inner side of the partition (102c) after passing through the guide hole (102c-1) and the connecting hole (102a), and the first fixing bolt (131) is screwed into the threaded hole (102c-2) to press the metal slide block (114) against the partition.

4. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The first nitrogenation box body (101) is fixedly connected with an insulating plate (115) on the inner side, and an electricity passing sleeve (104) is fixedly connected to the end of the insulating plate (115) away from the inner wall of the first nitrogenation box body (101), the third power line (117) is connected with the electricity passing sleeve (104), and a red copper sleeve (105) is fixed on the inner side of the electricity passing sleeve (104).

5. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The red copper sleeve (105) is threadedly connected with a threaded ring (106), and the threaded ring (106) presses the outer ring (300) stacked in the axial direction on the red copper sleeve (105).

6. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The first nitrogenation box body (101) is further fixedly connected with an insulating fixed plate (127), the insulating fixed plate (127) is fixedly connected with a red copper fixed plate (130), the first discharge plate (129) is provided with a slot (129b) in the axial direction, the red copper fixed plate (130) is inserted on the first discharge plate (129) along the slot (129b) at the end away from the insulating fixed plate (127), the first discharge plate (129) is provided with a threaded hole in communication with the slot (129b), and the red copper fixed plate (130) is pressed on the first discharge plate (129) by rotating a second fixed bolt into the threaded hole.

7. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The first nitrogenation box body (101) is fixedly connected with a first motor (109) and a second motor (111) on the outer side, the first motor (109) and the second motor (111) are respectively connected with a first output shaft (119) and a second output shaft (122) extending into the first nitrogenation box body (101), the first output shaft (119) is fixedly connected with the nitrogenation sleeve (102), and the second output shaft (122) is fixedly connected with the metal core rod (126).

8. A device for nitriding critical components of stainless steel bearings as claimed in claim 7, wherein: The first nitrogenation box body (101) is fixedly connected with a first circular ring (118) and a second circular ring (125) on the inner side, the first circular ring (118) and the second circular ring (125) are connected with the third power line (117) and the fourth power line (124) respectively, the first circular ring (118) is provided with a circular arc first groove (118a) on the side opposite to the nitrogenation sleeve (102), the second circular ring (125) is provided with a circular arc second groove on the end opposite to the metal core rod (126), the first circular ring (118) is attached to the outer side of the nitrogenation sleeve (102) through the first groove (118a), and the second circular ring (125) is attached to the outer side of the metal core rod (126) through the second groove.

9. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The second discharge plate (205) is arranged with a plurality of tooth grooves (205a) on the side away from the first insulating block (206).

10. A device for nitriding critical components of stainless steel bearings as claimed in claim 1 or 2, wherein: The second nitrogenation box body (201) is fixedly connected with a linear driver (214) on the outer side, the linear driver (214) is connected with a telescopic rod (215) which moves in a reciprocating straight line in the horizontal direction, and the insulating slide rod (203) is fixedly connected to the end of the telescopic rod (215) extending into the second nitrogenation box body (201).

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