Using method of bearing phosphating material frame

Abstract

The invention discloses a using method of a bearing phosphating material frame. The bearing phosphating material frame comprises a conveying trolley, a hanging tool and a hook. The transport trolley comprises a trolley tray, four universal trundles installed on the bottom faces of the four corners of the trolley tray and two hanging tool inserting grooves fixed to the middles of the two side faces of the trolley tray. The hanging tool comprises a hanging tool steel frame and a hanging rack; the hanger steel frame comprises a bottom frame, two top frames, two pairs of positioning shafts and two pairs of lifting hook shafts; the hanging frame comprises a grid hanging plate, two inserting rods fixed to the two sides of the grid hanging plate and a connecting column fixed between the middle of the top face of the grid hanging plate and the bottom face of the middle of the bottom frame. The hanging tool is inserted into the two hanging tool slots of the transport trolley through the two insertion rods; the hook comprises an inner ring hook and an outer ring hook, and the inner ring hook and the outer ring hook are hung on the front face and the back face of the grid hanging plate through two hanging plate hook bodies respectively. The problem of butt joint with an automatic phosphating line and an AGV transport vehicle can be perfectly solved, the production efficiency of the phosphating procedure is improved, cost is reduced, and efficiency is improved.

Description

Technical Field

[0001] The invention relates to a method for using a bearing phosphating material rack. Background Art

[0002] Phosphating is a chemical and electrochemical reaction process. Its main purpose is to provide protection for the base metal and prevent the metal from being corroded. It also plays a role in reducing friction and lubrication in the metal cold processing process. Bearing phosphating process is a commonly used surface treatment method. After the bearing ring is phosphated, its wear resistance and corrosion resistance can be improved. The traditional phosphating line has a poor on-site environment, and some harmful substances may be produced during the phosphating process. Someone must always pay attention to the phosphating process on site. The automated phosphating line will automatically complete the phosphating process of the bearing through computer information control. However, there are still some problems in the transportation of traditional phosphating racks and their docking with automated phosphating lines and AGV transport vehicles. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for using a bearing phosphating material rack, which can perfectly solve the problem of docking with an automated phosphating line and an AGV transport vehicle, improve the production efficiency of the phosphating process, and reduce costs and increase efficiency.

[0004] The object of the present invention is achieved in this way: a method for using a bearing phosphating material rack, wherein the bearing phosphating material rack includes a transport trolley, a hanger and a hook; wherein:

[0005] The transport trolley comprises a trolley tray with a rectangular plane, four universal casters mounted one-to-one on the bottom surface of the four corners of the trolley tray, and two hanger slots fixed one-to-one on the middle of the two side surfaces of the trolley tray;

[0006] The fixture includes a fixture steel frame and a hanger; wherein, the fixture steel frame includes a bottom frame, two top frames, two pairs of positioning shafts and two pairs of hook shafts; the bottom frame is in a lying "日" shape and is connected by two bottom cross bars and three bottom longitudinal bars; the two top frames are correspondingly spanned between the two ends of the two bottom cross bars of the bottom frame, and each top frame is in a gate shape and is connected by a pair of columns and a top longitudinal bar; the two pairs of positioning shafts are correspondingly and coaxially connected to the two ends of the two bottom cross bars of the bottom frame; the two pairs of hook shafts are relatively and correspondingly vertically connected to the inner side surfaces of the tops of a pair of columns of the two top frames; the hanger includes a grid hanging plate, two insertion rods and a connecting column; the grid hanging plate is rectangular and has a length adapted to the length of the trolley tray; the two insertion rods are correspondingly fixed on both sides of the grid hanging plate and are adapted to the fixture slots on the transport trolley, and the tops of the two insertion rods are correspondingly fixed in the middle of the inner side surfaces of the two bottom longitudinal bars located on both sides of the bottom frame; the connecting column is connected between the middle of the top surface of the grid hanging plate and the middle of the bottom surface of a bottom longitudinal bar located in the middle of the bottom frame; the fixture is inserted into the two fixture slots of the transport trolley through the two insertion rods correspondingly;

[0007] The hook includes several inner - ring hooks and several outer - ring hooks;

[0008] Each of the inner - ring hooks includes two hook bodies on the hanging plate and an inner - ring hook body; each of the hook bodies on the hanging plate is a steel strip with an inverted U - shaped hook on the top back; the inner - ring hook body includes two short upper inclined rods with inner ends correspondingly connected to the bottom of the fronts of the two hook bodies on the hanging plate, two horizontal rods correspondingly connected to the outer ends of the short upper inclined rods, two W - shaped rods correspondingly connected to the middle of the fronts of the two hanging plates, and a cross - connecting rod connected between the middle parts of the two horizontal rods; the lower ends of the two W - shaped rods are correspondingly fixed at the two ends of the two horizontal rods;

[0009] Each of the outer - ring hooks includes two hook bodies on the hanging plate and an outer - ring hook body; each of the hook bodies on the hanging plate is a steel strip with an inverted U - shaped hook on the top back; the outer - ring hook body includes two long upper inclined rods with inner ends correspondingly connected to the bottom of the fronts of the two hook bodies on the hanging plate, two lower inclined rods correspondingly connected between the middle of the fronts of the two hook bodies and the middle parts of the two long upper inclined rods, and a cross - connecting rod connected between the middle parts of the two long upper inclined rods;

[0010] Several inner - ring hooks and several outer - ring hooks are respectively hung on the front and back of the grid hanging plate through the two hook bodies on the hanging plate;

[0011] The using method of the bearing phosphating rack includes the following steps:

[0012] Step 1: First, grab the four hook shafts on the hanger with the gantry grabber, insert the hanger into the two hanger slots of the transport trolley through two insertion rods, and then hang several inner ring hooks and several outer ring hooks on the hanger plate of the hanger, several inner ring hooks are hung on the front or back of the hanger plate in scores, and several outer ring hooks are hung on the back or front of the plate in scores, and then hang two bearing inner rings on each inner ring hook, that is, hang one bearing inner ring on each of the two recesses of the W-shaped rod of the inner ring hook; hang one bearing outer ring on each outer ring hook to complete the assembly of the bearing phosphating material rack;

[0013] Step 2: The forklift AGV trolley scoops up the transport trolley and transports the entire bearing phosphating material rack to the phosphating workshop, where a positioning table is provided;

[0014] Step 3: The forklift AGV trolley places the bearing phosphating material rack on the positioning table in the phosphating workshop. Then the positioning table automatically rises and moves left and right or forward and backward until it touches the left and right positioning devices and the front and rear positioning devices, so that the bearing phosphating material rack is positioned at the position identified by the gantry car gripper. Then the gantry car gripper grabs the four hook shafts on the hanger and lifts the hanger upward to separate the hanger from the transport trolley. Then, the hanger with the phosphating product is sent to the top of the phosphating tank and then the hanger with the phosphating product is lowered until the four positioning shafts on the hanger are placed on the top surface of the two end walls of the phosphating tank, so that the lower part of the grid hanging plate on the hanger is immersed in the phosphating liquid in the phosphating tank.

[0015] Step 4. After the phosphating is completed, the forklift AGV trolley will place the transport trolley on the positioning table of the phosphating workshop in advance, and the front and rear positioning devices and the left and right positioning devices will position the transport trolley to the position identified by the gantry grabber. The gantry grabber will then grab the four hook shafts of the hanger on the phosphating tank, lift the hanger with the phosphating product out of the phosphating tank, and transfer the hanger to the top of the transport trolley. Then lower the hanger so that the two plug rods are inserted into the two hanger slots of the transport trolley until the two plug rods sit on the two slot bases one by one. Finally, the forklift AGV trolley will transport the bearing phosphating material rack away to complete the phosphating process.

[0016] The method for using the above-mentioned bearing phosphating material rack, wherein the bottom of the two hanger slots of the transport trolley are each fixed to the middle of the two side surfaces of the trolley tray through a slot base, and the top of the two hanger slots is each fixed with an inverted cone-shaped slot guide port; and a handle is each fixed in the middle of the outer side surfaces of the two hanger slots.

[0017] The method for using the above-mentioned bearing phosphating material rack, wherein a conical guide shaft is provided between each of the positioning shafts and the end of the bottom cross bar; a conical guide shaft is also provided between the hook shaft and the top inner side surface of the column.

[0018] The method for using the above-mentioned bearing phosphating material rack, wherein the grid hanging plate is composed of two parallel mesh plates, the longitudinal bars and transverse bars of each mesh plate are made of round steel, and the spacing between the transverse bars is the same as the spacing between the longitudinal bars.

[0019] The beneficial effects of the method for using the bearing phosphating material rack of the present invention are:

[0020] 1. The present invention adopts a separate structure of a transport trolley and a hanger, which can better connect the processes before and after phosphating, so that the phosphating process can be completed more smoothly;

[0021] 2. The hanger of the present invention can place multiple bearing rings at the same time, which improves the phosphating treatment efficiency. The hanger plate adopts a mesh plate, which helps the phosphating liquid to quickly pass through the mesh during the lifting and lowering of the hanger in the phosphating tank, thereby ensuring the phosphating treatment quality of the bearing ring. The hanger steel frame on the hanger can enable the gantry grabber to better grasp and put back the hanger, completing the automated connection of the phosphating process.

[0022] 3. The hook of the present invention can reduce the contact area between the hook and the bearing ring, so that the phosphating liquid can fully contact the surface of the bearing ring, improve the phosphating effect of the bearing ring, and ensure that the bearing ring on the hook will not tilt or shift due to shaking during transportation and phosphating operations.

[0023] 4. The hook that is not fixed on the hanging plate can meet the switching requirements of phosphating of bearing rings of different models. It is easy to operate and there is no need to replace the hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the bearing phosphating material rack of the present invention;

[0025] Figure 2 yes Figure 1 Side view of

[0026] Figure 3 It is a stereoscopic diagram of a transport trolley in a bearing phosphating material rack of the present invention;

[0027] Figure 4 It is a three-dimensional diagram of a hanger in a bearing phosphating material rack of the present invention;

[0028] Figure 4a It is a front view of a hanger in a bearing phosphating material rack of the present invention;

[0029] Figure 4b It is a top view of a hanger in a bearing phosphating material rack of the present invention;

[0030] Figure 5 It is a stereoscopic view of the inner ring hook in the bearing phosphating material rack of the present invention;

[0031] Figure 5a It is a side view of a hanger in a bearing phosphating material rack of the present invention;

[0032] Figure 6 is a three-dimensional view of the outer ring hook in the bearing phosphating rack of the present invention;

[0033] Figure 6a is a side view of the hanger in the bearing phosphating rack of the present invention;

[0034] Figure 7 is a top view of the state when performing step two in the using method of the bearing phosphating rack of the present invention;

[0035] Figure 8 is a top view of the state when performing step three in the using method of the bearing phosphating rack of the present invention. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] Please refer to Figures 1 to 8 , the using method of the bearing phosphating rack of the present invention, the bearing phosphating rack includes a transport trolley 1, a hanger 2 and a hook.

[0038] The transport trolley 1 includes a trolley tray 11, four universal casters and two hanger slots 14; wherein, the plane of the trolley tray 11 is rectangular; the four universal casters are respectively installed on the bottom surfaces of the four corners of the trolley tray 11, so that the lower trolley tray 11 is at a certain height from the ground, facilitating the forklift-type AGV trolley to lift; among the four universal casters, two universal casters are fixed casters 12a, and the other two universal casters are brake casters 12b; the two hanger slots 14 are respectively fixed to the middle parts of the two side surfaces of the trolley tray 11 through a slot base 13; the hanger slots 14 can be made of channel steel; a tapered slot guiding port 15 is respectively fixed to the top of the two hanger slots 14; a handle 16 is respectively fixed to the middle part of the outer side surface of the two hanger slots 14. During normal transportation, the transport trolley 1 is generally responsible for the forklift-type AGV trolley. The transport trolley 1 is generally in a locked state. When it needs to be manually moved over a short distance, a pair of brake casters 12b can be unlocked, and the transport trolley 1 can be pushed through the handle 16.

[0039] The hanger 2 includes a hanger steel frame 2A and a hanging frame 2B;

[0040] The hanger steel frame 2A includes a bottom frame 21, two top frames 22, two pairs of positioning shafts 23 and two pairs of hook shafts 24; wherein,

[0041] The bottom frame 21 is in a lying "day" shape and is connected by two bottom cross bars 211 and three bottom longitudinal bars 212;

[0042] The two top frames 22 are connected one by one between the two ends of the two bottom cross bars 211 of the bottom frame 21. Each top frame 22 is door-shaped and is connected by a pair of columns 221 and a top longitudinal bar 222.

[0043] Two pairs of positioning shafts 23 are coaxially connected to the two ends of the two bottom cross bars 211 of the bottom frame 21 in a one-to-one correspondence; a conical guide shaft 230 is provided between each positioning shaft 23 and the end of the bottom cross bar 211;

[0044] The two pairs of hook shafts 24 are vertically connected to the top inner side surfaces of a pair of columns 221 of the two top frames 22 oppositely and one by one; a conical guide shaft 230 is also provided between each hook shaft 24 and the top inner side surface of the column 221.

[0045] The rack 2B includes a grid hanging plate 25, two insertion rods 26 and a connecting column 27; wherein,

[0046] The grid hanging plate 25 is rectangular and its length is adapted to the length of the trolley tray 11; the grid hanging plate 25 is composed of two parallel mesh plates, and the longitudinal and transverse bars of each mesh plate are made of round steel, and the spacing between the transverse bars is the same as the spacing between the longitudinal bars;

[0047] Two insertion rods 26 are fixed one by one on both sides of the grid hanging plate 25 and are adapted to the hanger slots 14 on the transport trolley 1. The tops of the two insertion rods 26 are fixed one by one on the middle of the inner side surfaces of the two bottom longitudinal rods 212 located on both sides of the bottom frame 21.

[0048] The connecting column 27 is connected between the middle of the top surface of the grid hanging plate 25 and the middle of the bottom surface of a bottom longitudinal rod 212 located in the middle of the bottom frame 21;

[0049] The hanger 2 is plugged into the two hanger slots 14 of the transport trolley 1 and on the two slot bases 13 in a one-to-one correspondence through two plug rods 26 .

[0050] The hooks include a plurality of inner circle hooks 3A and a plurality of outer circle hooks 3B;

[0051] Each inner circle hook 3A includes two hanging plate hook bodies 30 and an inner circle hook body connected to the two hanging plate hook bodies 30;

[0052] The spacing between the two hanging plate hook bodies 30 is adapted to the hole spacing of the grid hanging plate 25; the hanging plate hook body 30 is a steel strip with an inverted U-shaped hook on the top and back;

[0053] The inner circle hook body includes two upper oblique rods 31 whose inner ends are connected to the bottom of the front of the two hanging plate hook bodies 30 in a one-to-one correspondence, two horizontal rods 32 connected to the outer ends of the short upper oblique rods 31 in a one-to-one correspondence, two W-shaped rods 33 connected to the middle of the front of the two hanging plate hooks 30 in a one-to-one correspondence, and a horizontal connecting rod 34 connected between the middles of the two horizontal rods 32, and the lower ends of the two W-shaped rods 33 are fixed to the two ends of the two horizontal rods 32 in a one-to-one correspondence;

[0054] Each outer ring hook 3B includes two hanging plate hook bodies 30 and an outer ring hook body connected to the two hanging plate hook bodies 30;

[0055] The spacing between the two hanging plate hook bodies 30 is adapted to the hole spacing of the grid hanging plate 25; the hanging plate hook body 30 is a steel strip with an inverted U-shaped hook on the top and back;

[0056] The outer hook body includes two long upper oblique rods 35 whose inner ends are connected one-to-one to the bottom of the front surface of the two hanging plate hooks 30, two lower oblique rods 36 connected one-to-one between the middle of the front surface of the two hanging plate hooks 30 and the middle of the two long upper oblique rods 35, and a horizontal connecting rod 34 connected between the middle of the two long upper oblique rods 35.

[0057] The plurality of inner circle hooks 3A and the plurality of outer circle hooks 3B are respectively hung on the front and back sides of the grid hanging board 25 through two hanging board hook bodies 30 .

[0058] The method for using the bearing phosphating material rack of the present invention comprises the following steps:

[0059] Step 1: First, grab the four hook shafts 24 on the hanger 2 with the gantry grabber, insert the hanger 2 into the two hanger slots 14 of the transport trolley 1 through the two insertion rods 26, until the two insertion rods 26 are seated on the two slot bases 13 one by one, and then hang several inner circle hooks 3A and several outer circle hooks 3B on the hanging plate 25 of the hanger 2, several inner circle hooks 3A are hung in scores on the front or back of the hanging plate 25, and several outer circle hooks 3B are hung in scores on the back or front of the plate 25, and then on each inner circle hook 3A, the outer circle hooks 3B are hung in scores on the back or front of the plate 25. Two bearing inner rings 4A are hung on the inner ring hook 3A, that is, one bearing inner ring 4A is hung on each of the two recesses of the W-shaped rod 33 of the inner ring hook 3A, so that the two bearing inner rings 4A do not contact each other; one bearing outer ring 4B is hung on each outer ring hook 3B, that is, the bearing outer ring 4B is hung on the recess formed by the two long upper inclined rods 35 and the two lower inclined rods 36 of the outer ring hook body, and the assembly of the bearing phosphating material rack 100 is completed; the bearing inner ring 4A or the bearing outer ring 4B can also be hung on the front and back of the hanging plate 25;

[0060] Step 2: Use the forklift AGV 200 to scoop up the transport trolley 1 (see Figure 7 ), transporting the entire bearing phosphating material rack 100 to a phosphating workshop, where a positioning table 300 is provided;

[0061] Step 3: The forklift AGV trolley 200 places the bearing phosphating material rack 100 on the positioning platform 300 in the phosphating workshop. Then the positioning platform 300 automatically rises and moves left and right or forward and backward until it touches the left and right positioning devices 301 and the front and rear positioning devices 302, so that the bearing phosphating material rack 100 is positioned at the position recognized by the gantry gripper (see Figure 8 ), and then the four hook shafts 24 on the hanger 2 are grabbed by the gantry grabber to lift the hanger 2 upward, so that the hanger 2 and the transport trolley 1 are separated. The guide shaft 230 at one end of the hook shaft 24 is used to guide the gantry grabber to correctly grab the position of the hook shaft 24. Then the gantry grabber sends the hanger 2 with the phosphating product to the top of the phosphating tank and then lowers the hanger 2 with the phosphating product until the four positioning shafts 23 on the hanger 2 are placed on the top surface of the two end walls of the phosphating tank, so that the lower part of the grid hanging plate 25 on the hanger 2 is immersed in the phosphating solution in the phosphating tank; the guide shaft 230 at one end of the positioning shaft 23 is used to guide the hanger 2 to be correctly placed on the top surface of the two end walls of the phosphating tank;

[0062] Step 4. After the phosphating is completed, the forklift AGV trolley 200 places the transport trolley 1 on the positioning table of the phosphating workshop in advance, and the front and rear positioning devices and the left and right positioning devices position the transport trolley 1 to the position identified by the gantry gripper, and then the gantry gripper grabs the four hook shafts 24 of the hanger 2 on the phosphating tank, and lifts the hanger 2 with the phosphating product out of the phosphating tank, and transfers the hanger 2 to the top of the transport trolley 1, and then lowers the hanger 2, so that the two insertion rods 26 are inserted into the two hanger slots 14 of the transport trolley 1, until the two insertion rods 26 are seated on the two slot bases 13 one by one, and finally the forklift AGV trolley 200 transports the bearing phosphating material rack 100 (see Figure 7 ), completing a phosphating process.

[0063] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for using a bearing phosphating rack, where the bearing phosphating rack includes a transport trolley, a hanger, and hooks; among them, the transport trolley includes a trolley tray with a rectangular plane, four universal casters respectively installed on the bottom surfaces of the four corners of the trolley tray, and two hanger slots respectively fixed in the middle of the two side surfaces of the trolley tray; the hanger includes a hanger steel frame and a hanging rack; among them, the hanger steel frame includes a bottom frame, two top frames, two pairs of positioning shafts, and two pairs of hook shafts; the bottom frame is in a lying "day" shape and is connected by two bottom cross bars and three bottom longitudinal bars; the two top frames are respectively straddled between the two ends of the two bottom cross bars of the bottom frame, and each top frame is in a door shape and is connected by a pair of columns and a top longitudinal bar; the two pairs of positioning shafts are respectively coaxially connected to the two ends of the two bottom cross bars of the bottom frame; the two pairs of hook shafts are relatively and respectively vertically connected to the inner side surfaces at the tops of a pair of columns of the two top frames; the hanging rack includes a grid hanging plate, two insertion rods, and a connecting column; the grid hanging plate is rectangular and its length is adapted to the length of the trolley tray; the two insertion rods are respectively fixed on the two sides of the grid hanging plate and are adapted to the hanger slots on the transport trolley, and the tops of the two insertion rods are respectively fixed in the middle of the inner side surfaces of the two bottom longitudinal bars located on both sides of the bottom frame; the connecting column is connected between the middle of the top surface of the grid hanging plate and the middle of the bottom surface of a bottom longitudinal bar located in the middle of the bottom frame; the hanger is inserted into the two hanger slots of the transport trolley through the two insertion rods respectively; the hooks include several inner - ring hooks and several outer - ring hooks; each of the inner - ring hooks includes two hook - plate bodies and an inner - ring hook body; each hook - plate body is a steel plate strip with an inverted U - shaped hook on the top back; the inner - ring hook body includes two short upper inclined rods with inner ends respectively connected to the bottom of the fronts of the two hook - plate bodies, two horizontal rods respectively connected to the outer ends of the short upper inclined rods, two W - shaped rods respectively connected to the middle of the fronts of the two hook - plates, and a cross - connecting rod connected between the middle of the two horizontal rods; the lower ends of the two W - shaped rods are respectively fixed to the two ends of the two horizontal rods; each of the outer - ring hooks includes two hook - plate bodies and an outer - ring hook body; each hook - plate body is a steel plate strip with an inverted U - shaped hook on the top back; the outer - ring hook body includes two long upper inclined rods with inner ends respectively connected to the bottom of the fronts of the two hook - plates, two lower inclined rods respectively connected between the middle of the fronts of the two hook - plates and the middle of the two long upper inclined rods, and a cross - connecting rod connected between the middle of the two long upper inclined rods; several inner - ring hooks and several outer - ring hooks are respectively hung on the front and back of the grid hanging plate through the two hook - plate bodies; characterized in that the method for using the bearing phosphating rack includes the following steps: Step 1: First, grab the four hook shafts on the hanger with the gantry grabber, insert the hanger into the two hanger slots of the transport trolley through two insertion rods, and then hang several inner ring hooks and several outer ring hooks on the hanger plate of the hanger, several inner ring hooks are hung on the front or back of the hanger plate in scores, and several outer ring hooks are hung on the back or front of the plate in scores, and then hang two bearing inner rings on each inner ring hook, that is, hang one bearing inner ring on each of the two recesses of the W-shaped rod of the inner ring hook; hang one bearing outer ring on each outer ring hook to complete the assembly of the bearing phosphating material rack; Step 2: The forklift AGV trolley scoops up the transport trolley and transports the entire bearing phosphating material rack to the phosphating workshop, where a positioning table is provided; Step 3: The forklift AGV trolley places the bearing phosphating material rack on the positioning table in the phosphating workshop. Then the positioning table automatically rises and moves left and right or forward and backward until it touches the left and right positioning devices and the front and rear positioning devices, so that the bearing phosphating material rack is positioned at the position identified by the gantry car gripper. Then the gantry car gripper grabs the four hook shafts on the hanger and lifts the hanger upward to separate the hanger from the transport trolley. Then, the hanger with the phosphating product is sent to the top of the phosphating tank and then the hanger with the phosphating product is lowered until the four positioning shafts on the hanger are placed on the top surface of the two end walls of the phosphating tank, so that the lower part of the grid hanging plate on the hanger is immersed in the phosphating liquid in the phosphating tank. Step 4. After the phosphating is completed, the forklift AGV trolley will place the transport trolley on the positioning table of the phosphating workshop in advance, and the front and rear positioning devices and the left and right positioning devices will position the transport trolley to the position identified by the gantry grabber. The gantry grabber will then grab the four hook shafts of the hanger on the phosphating tank, lift the hanger with the phosphating product out of the phosphating tank, and transfer the hanger to the top of the transport trolley. Then lower the hanger so that the two plug rods are inserted into the two hanger slots of the transport trolley until the two plug rods sit on the two slot bases one by one. Finally, the forklift AGV trolley will transport the bearing phosphating material rack away to complete the phosphating process.

2. The method for using the bearing phosphating material rack according to claim 1, characterized in that: The bottoms of the two hanger slots of the transport trolley are each fixed to the middle of the two side surfaces of the trolley pallet through a slot base, and the tops of the two hanger slots are each fixed with an inverted cone-shaped slot guide opening; and a handle is each fixed to the middle of the outer side surfaces of the two hanger slots.

3. The method for using the bearing phosphating material rack according to claim 1, characterized in that: A conical guide shaft is arranged between each positioning shaft and the end of the bottom cross bar; a conical guide shaft is also arranged between the hook shaft and the top inner side surface of the column.

4. The method for using the bearing phosphating material rack according to claim 1, characterized in that: The grid hanging plate is composed of two parallel mesh plates, the longitudinal bars and transverse bars of each mesh plate are made of round steel, and the spacing between the transverse bars is the same as the spacing between the longitudinal bars.

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