CN219170599U

CN219170599U - Surface treatment device for metal product

Info

Publication number: CN219170599U
Application number: CN202320179747.2U
Authority: CN
Inventors: 陈德成
Original assignee: Ningbo Ruishi Technology Co ltd
Current assignee: Ningbo Ruishi Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-06-13
Anticipated expiration: 2033-02-10

Abstract

The utility model provides a surface treatment device for a metal product, and belongs to the technical field of product surface treatment. The surface treatment device for the metal product comprises a working box body, a driving motor, a driving shaft, a hanging rack, a sand box, a sand pump, a sand blasting pipeline, a sliding sleeve and a connecting sleeve; according to the utility model, the sliding sleeve is sleeved on the driving shaft, the sliding sleeve and the driving shaft are limited through the sliding block and the sliding groove, the sliding sleeve is connected to the connecting sleeve through the rotating bearing, the bottom of the sliding sleeve is provided with the supporting rods with the hanging frames, so that the driving shaft can drive the sliding sleeve to rotate, and meanwhile, the sliding sleeve can be driven by the connecting sleeve to reciprocate along the axial direction of the driving shaft, thereby realizing the rotation of the hanging frames and the lifting in the height direction, realizing the change of the positions of metal products placed on the hanging frames in the circumferential direction and the height direction, so that the circumferential direction and the height direction of the surfaces of the metal products can be uniformly treated, the surface treatment effect is improved, and the quality of the metal products is improved.

Description

Surface treatment device for metal product

Technical Field

The utility model relates to the technical field of product surface treatment, in particular to a surface treatment device for a metal product.

Background

The surface treatment of the metal product can improve the performance and the aesthetic property of the product, and the conventional surface treatment modes comprise surface polishing, surface paint spraying, surface coating and the like. However, in the actual machining process, in order to enhance the polishing, paint spraying and electroplating effects, surface sandblasting or shot blasting is usually performed before the process to remove oxide layers, stains and the like on the surface of the metal product.

Along with the diversified development of products, combs with metal materials as handle frameworks appear on the market, and when the handle frameworks are processed, sand blasting or shot blasting treatment is needed to facilitate subsequent polishing, paint spraying, surface plating treatment and the like on the handle frameworks. However, the polishing device for polishing metal products is currently available on the market, as disclosed in patent CN108262693a, a motor is arranged at the top end of a polishing chamber, one end of the motor is connected with a rotating shaft inserted into the polishing chamber, a plurality of hanging rod groups are arranged on the rotating shaft along the length direction, sand blasting pipelines are arranged on two sides of the polishing chamber, a plurality of sand blasting openings are vertically arranged on one side of the side wall of the polishing chamber opposite to the sand blasting pipeline, and the sand blasting openings penetrate through the side wall of the polishing chamber and then extend into the polishing chamber, so that in the processing process, the metal pieces are hung on the hanging rods through hooks, sand is sprayed out towards the polishing chamber at a high speed through the sand blasting pipelines and the sand blasting openings, the electric driving motor operates, the rotating shaft rotates to drive the hanging rod groups to rotate, and the metal pieces hung on the hanging rod groups can rotate automatically, so that 360-degree dead-angle-free polishing treatment is realized. However, since the rotation shaft can only rotate and is arranged without movement in the height direction, in addition, the position of the sand blasting opening on the polishing chamber is also of a fixed structure, so that the direction of sand ejected from the sand blasting opening is fixed, the problem that the contact position of the sand with a metal piece on a hanging rod in the height direction is uneven in distribution still exists, the surface treatment requirements of the metal piece are different, and the surface treatment quality of the metal piece is affected.

Disclosure of Invention

The surface treatment device for the metal product aims at solving the problems in the prior art, and aims at providing a surface treatment device for the metal product, so that a rotatable driving shaft which is vertically arranged is arranged, a sliding sleeve which can rotate along with the driving shaft is sleeved outside the driving shaft, and meanwhile, the sliding sleeve can axially slide on the driving shaft, so that the metal product can be driven to reciprocate in the height direction through the sliding sleeve during sand blasting, the uniform treatment of the surface of the metal product in the circumferential direction can be ensured, the uniform treatment of the surface of the metal product in the height direction can be ensured, the surface treatment effect of the metal product is improved, and the processing quality of the metal product is improved.

The specific technical scheme is as follows:

the utility model provides a surface treatment device of metal product, including the work box, driving motor, the drive shaft, the stores pylon, the sand box, the sand pump, the sand blasting pipeline, the bottom of work box is provided with sand opening down, sand opening below is provided with the sand box, the sand box has the sand pump through the pipe connection, the sand pump passes through the pipe connection sand blasting pipeline, a plurality of sand blasting openings have been seted up on the work box lateral wall, sand blasting opening and sand blasting pipeline intercommunication, driving motor sets up in the top of work box, the vertical arrangement of drive shaft and upper end are connected with driving motor, the lower extreme extends to in the work box, have such characteristics, still include:

the sliding sleeve is sleeved on one end of the driving shaft extending into the working box body, a sliding groove is formed in the outer wall of one end of the driving shaft extending into the working box body along the axial direction of the driving shaft, and a sliding block corresponding to the sliding groove is arranged on the inner wall of the sliding sleeve in a protruding mode;

the connecting sleeve is coaxially sleeved outside the sliding sleeve, a rotating bearing is arranged between the connecting sleeve and the sliding sleeve, meanwhile, the connecting sleeve is connected with a push-pull rod of which one end extends out of the working box body, and the other end of the push-pull rod is hinged with a telescopic driver arranged outside the working box body;

the outer bracing piece that is provided with a plurality of axial arrangements along the drive shaft on the bottom of sliding sleeve is followed, and on each bracing piece and along its length direction all interval be provided with a plurality of stores pylon, all be provided with a plurality of stations of placing on each stores pylon.

The surface treatment device for the metal product is characterized in that a poking rod is further arranged between the poking rod and the telescopic driver, the poking rod is in a Y shape, the two sides of the connecting sleeve are connected with the poking rod, one ends of the two poking rods, which deviate from the connecting sleeve, are respectively hinged with two ends of a fork of the poking rod, meanwhile, the end of a non-fork end of the poking rod is hinged with the telescopic driver, and the middle of the non-fork end of the poking rod is hinged with the outer wall of the working box body.

The surface treatment device for the metal product comprises a plurality of support rods, wherein one ends of the support rods, which deviate from the sliding sleeve, are provided with reinforcing rings, and the reinforcing rings are fixedly connected with the end parts of each support rod.

The surface treatment device for the metal product comprises a support rod, wherein a plurality of locking holes are formed in the support rod, a fixing block is arranged at the end part of one end of the hanger, a mounting hole corresponding to the locking hole is formed in the fixing block, and the mounting hole and the corresponding locking hole are locked through a bolt.

The surface treatment device for metal products, wherein the lower end of the chute extends to the bottom end of the driving shaft and is communicated with the outside.

The surface treatment device for the metal product comprises a baffle plate, wherein the end face of the bottom end of the driving shaft is provided with a connecting hole, the end face of the bottom end of the driving shaft is provided with a matching hole corresponding to the connecting hole, a locking screw penetrates through the matching hole and then is connected with the connecting hole, and when the baffle plate is arranged on the end face of the bottom end of the driving shaft, the side edge of the baffle plate blocks a notch of the sliding groove.

In the surface treatment device for metal products, among a plurality of placing stations on the same hanger, two adjacent placing stations are arranged in a staggered manner in the height direction.

The surface treatment device for the metal product comprises a placing station, wherein the placing station is a hanging lug or a jack.

The surface treatment device for the metal product comprises a rotating bearing, wherein the rotating bearing comprises two tapered roller bearings, and the arrangement directions of the two tapered roller bearings are opposite and are respectively arranged at the upper end and the lower end of the sliding sleeve.

The surface treatment device for the metal product is characterized in that an opening and closing door is arranged on the side wall of the working box body.

The technical scheme has the positive effects that:

the sliding sleeve is sleeved on the driving shaft, the sliding sleeve and the driving shaft are limited through the sliding groove and the sliding block, the sliding sleeve can move along the axial direction of the driving shaft while rotating along the driving shaft, and the supporting rods for installing a plurality of hanging racks are arranged at the bottom of the sliding sleeve, so that when a metal product to be processed is placed on the hanging racks, the metal product can rotate and move up and down in the working box, the surface of the metal product can be uniformly treated in the circumferential direction, the surface of the metal product can be uniformly treated in the height direction, the omnibearing treatment of the surface of the metal product is realized, the effect of surface treatment is guaranteed, and the quality of the metal product is improved.

Drawings

FIG. 1 is a block diagram of an embodiment of a surface treating apparatus for a metal product according to the present utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a block diagram of a connecting sleeve according to a preferred embodiment of the present utility model;

FIG. 4 is a schematic view showing the installation of the sliding sleeve and the supporting rod according to a preferred embodiment of the present utility model;

FIG. 5 is a block diagram of a tap lever according to a preferred embodiment of the utility model.

In the accompanying drawings: 1. a working box body; 11. a sand outlet; 12. a sand blasting port; 2. a driving motor; 3. a drive shaft; 31. a chute; 32. a baffle; 4. a hanging rack; 41. a placement station; 42. a fixed block; 5. a sand box; 6. a sand blasting pipeline; 7. a sliding sleeve; 71. a slide block; 8. connecting sleeves; 81. a push-pull rod; 82. a support rod; 83. a toggle rod; 84. a reinforcing ring; 821. a locking hole; 9. and (5) rotating the bearing.

Detailed Description

In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present utility model easy to understand, the following embodiments specifically describe the technical solution provided by the present utility model with reference to fig. 1 to 5, but the following disclosure is not limited to the present utility model.

FIG. 1 is a block diagram of an embodiment of a surface treating apparatus for a metal product according to the present utility model; fig. 2 is an enlarged view of a portion a in fig. 1. As shown in fig. 1 and 2, the surface treatment apparatus for a metal product provided in this embodiment includes: the sand box comprises a working box body 1, a driving motor 2, a driving shaft 3, a hanging frame 4, a sand box 5, a sand pump, a sand blasting pipeline 6, a sliding sleeve 7, a connecting sleeve 8 and a telescopic driver.

Specifically, the bottom of work box 1 is provided with sand outlet 11, is provided with sand box 5 below sand outlet 11 for sand grain that processing was used can drop to in sand box 5 from sand outlet 11 and be collected, does benefit to subsequent cyclic utilization. Meanwhile, the sand box 5 is connected with a sand pump through a pipeline, and the sand pump is connected with a sand blasting pipeline 6 through a pipeline, so that the sand pump pumps sand in the sand box 5 into the sand blasting pipeline 6, and in addition, the sand blasting pipeline 6 is connected with a high-pressure pump, so that sand in the sand blasting pipeline 6 can be sprayed out at a high speed subsequently. And, set up a plurality of sand blasting openings 12 on working box 1 lateral wall, sand blasting opening 12 and sand blasting pipeline 6 intercommunication for sand grain in the sand blasting pipeline 6 can enter into working box 1 through sand blasting opening 12, satisfies the surface sand blasting to the metal product in the working box 1. At this time, driving motor 2 sets up in the top of working box 1, and drive shaft 3 is vertical to be arranged and the upper end is connected with driving motor 2, and the lower extreme extends to in the working box 1 for driving motor 2 drives drive shaft 3 and rotates on working box 1, provides the condition for follow-up drive shaft 3 drives the metal product and rotates. Since the above structure has been disclosed in chinese patent CN108262693a, the specific sandblasting structure and the working procedure thereof will not be described herein.

Specifically, the working box 1 is further provided with a sliding sleeve 7, and at this time, the sliding sleeve 7 is sleeved on one end of the driving shaft 3 extending into the working box 1, so that the sliding sleeve 7 can move relative to the driving shaft 3. Furthermore, the outer wall of one end of the driving shaft 3 extending into the working box body 1 is provided with a sliding groove 31 along the axial direction, and preferably, two sides of the driving shaft 3 are symmetrically provided with the sliding groove 31, so that the stress of the driving shaft 3 is more uniform, and meanwhile, the problem of blocking caused by uneven stress of the follow-up sliding sleeve 7 is also prevented. Meanwhile, the sliding blocks 71 corresponding to the sliding grooves 31 are arranged on the inner wall of the sliding sleeve 7 in a protruding mode, namely when the sliding sleeve 7 is installed on the driving shaft 3, the sliding sleeve 7 and the driving shaft 3 are matched through the sliding blocks 71 and the sliding grooves 31, so that the sliding sleeve 7 can rotate along the driving shaft 3 in the circumferential direction, the sliding sleeve 7 can slide in the axial direction of the driving shaft 3 in a reciprocating mode, the surface of a subsequent metal product can be uniformly processed in the circumferential direction and the height direction, and processing requirements are met.

Fig. 3 is a structural diagram of a connecting sleeve according to a preferred embodiment of the present utility model. As shown in fig. 1, 2 and 3, the working box 1 is further provided with a connecting sleeve 8, at this time, the connecting sleeve 8 is coaxially sleeved outside the sliding sleeve 7, so that concentric arrangement of the connecting sleeve 8 and the sliding sleeve 7 is ensured, and uniformity of stress of the sliding sleeve 7 can be ensured when the subsequent connecting sleeve 8 drives the sliding sleeve 7 to move. And be provided with rotation bearing 9 between adapter sleeve 8 and the sliding sleeve 7 for adapter sleeve 8 can rotate for sliding sleeve 7, has avoided adapter sleeve 8 to hinder sliding sleeve 7 to follow drive shaft 3 rotation, has maintained the normal operating of device. Meanwhile, a push-pull rod 81 with one end extending to the outside of the working box body 1 is connected to the side wall of the connecting sleeve 8, the other end of the push-pull rod 81 is hinged with a telescopic driver arranged outside the working box body 1, namely, the push-pull rod 81 is driven to move through the telescopic driver, the connecting sleeve 8 is driven to move along the axial direction of the driving shaft 3 through the push-pull rod 81, so that the sliding sleeve 7 is driven to do telescopic motion in the working box body 1 along the axial direction of the driving shaft 3, and the position adjustment of a metal product to be processed in the height direction is met. It is worth pointing out that the telescopic driver is a cylinder, and the reaction is rapid, and the use cost is lower.

FIG. 4 is a schematic view showing the installation of the sliding sleeve and the supporting rod according to a preferred embodiment of the present utility model. As shown in fig. 1 and 4, a plurality of support rods 82 are arranged on the outer edge of the bottom of the sliding sleeve 7 along the axial direction of the driving shaft 3, and the support rods 82 extend towards the bottom of the working box 1, so that the length of the support rods 82 is maintained. Simultaneously, a plurality of hanging frames 4 are arranged on each supporting rod 82 at intervals along the length direction of the supporting rods, a plurality of placing stations 41 are arranged on each hanging frame 4, namely, enough placing stations 41 are provided through the supporting rods 82 and the hanging frames 4, so that the surface treatment requirements of a plurality of metal products are met simultaneously, and the processing efficiency is improved.

FIG. 5 is a block diagram of a tap lever according to a preferred embodiment of the utility model. As shown in fig. 1, 2 and 5, a toggle rod 83 is further disposed between the push-pull rod 81 and the telescopic driver, and the toggle rod 83 is used as a transmission structure between the push-pull rod 81 and the telescopic driver. At this time, the toggle rod 83 is arranged in a Y shape, and push-pull rods 81 are connected to two sides of the connecting sleeve 8, so that the stress of the connecting sleeve 8 is more uniform, one ends of the two push-pull rods 81 deviating from the connecting sleeve 8 are respectively hinged with two ends of a fork of the toggle rod 83, namely, the simultaneous driving of the toggle rod 83 on the two push-pull rods 81 is realized, and the structural design is more reasonable. Meanwhile, the end of the non-turnout end of the poking rod 83 is hinged to the telescopic driver, and the middle of the non-turnout end of the poking rod 83 is hinged to the outer wall of the working box body 1, so that the poking rod 83 forms a lever structure, normal movement of the poking rod 83 is guaranteed, meanwhile, the stress of the telescopic driver is reduced, and the service life of the telescopic driver is prolonged.

More specifically, one end of the supporting rods 82, which is far away from the sliding sleeve 7, is further provided with a reinforcing ring 84, at this time, the reinforcing ring 84 is fixedly connected with the end of each supporting rod 82, that is, the upper ends of the supporting rods 82 are connected by the sliding sleeve 7 to form an integral structure, and the lower ends of the supporting rods 82 are connected by the reinforcing ring 84 to form an integral structure, so that the stability of installation of the supporting rods 82 is improved, the bearing capacity is stronger, and the structural design is more reasonable.

More specifically, each support rod 82 is provided with a plurality of locking holes 821 along the length direction thereof, meanwhile, the end part of one end of the hanger 4 is provided with a fixed block 42, at this time, the fixed block 42 is provided with a mounting hole corresponding to the locking hole 821, namely, when the hanger 4 is mounted on the support rod 82, the mounting hole on the fixed block 42 is locked with the corresponding locking hole 821 on the support rod 82 through bolts, namely, the detachable connection between the hanger 4 and the support rod 82 is realized, so that a user can replace different hangers 4 according to actually processed metal products, the structural flexibility is higher, and the adaptability is better.

More specifically, the lower extreme of spout 31 on the drive shaft 3 extends to the bottom of drive shaft 3 to the notch and the external intercommunication of the one end of spout 31 extension to the bottom of drive shaft 3 have realized the run through of spout 31 to the terminal surface of the bottom of drive shaft 3 promptly, thereby make sliding sleeve 7 can install to drive shaft 3 from the bottom of drive shaft 3, made things convenient for the dismouting of sliding sleeve 7 on drive shaft 3, structural design is more reasonable.

More specifically, a baffle 32 is further disposed on the end face of the bottom end of the driving shaft 3, at this time, a connection hole is further disposed on the end face of the bottom end of the driving shaft 3, meanwhile, a fitting hole corresponding to the connection hole is disposed on the baffle 32, and a locking screw penetrates through the fitting hole and then is connected with the connection hole, that is, when the baffle 32 is mounted on the end face of the bottom end of the driving shaft 3, the baffle 32 can be stably mounted on the driving shaft 3 through the locking screw. When the baffle 32 is mounted on the end face of the bottom end of the driving shaft 3, the side edge of the baffle 32 blocks the notch of the sliding groove 31, namely, after the sliding sleeve 7 is mounted on the driving shaft 3, the sliding block 71 on the sliding sleeve 7 slides into the sliding groove 31 on the driving shaft 3, at the moment, the baffle 32 is mounted on the end face of the bottom end of the driving shaft 3, the end part of the sliding groove 31 is blocked by the baffle 32, so that the sliding block 71 is prevented from falling out of the sliding groove 31, the sliding sleeve 7 is prevented from falling out of the driving shaft 3, and the structural design is more reasonable.

More specifically, among the plurality of placing stations 41 on the same hanger 4, two adjacent placing stations 41 are arranged in a staggered manner in the height direction, and preferably, the two placing stations 41 arranged at intervals are located at the same height, so that when a metal product to be processed is placed on the placing stations 41, the two adjacent metal products can be staggered from each other in the height direction, the problem that the metal product is blocked due to sand blasting of the metal product on the inner side caused by superposition of the metal products is effectively avoided, and the surface treatment effect is further improved.

More specifically, the placing station 41 on the hanger 4 is a hanging lug or a jack, when the metal product itself has a hanging hole, the placing station 41 is a hanging lug, the metal product can pass through the hanging hole through the hanging hook and then hang on the hanging lug, but the metal product itself does not have the hanging hole, the placing station 41 is a jack, and the end part of the metal product can be inserted into the jack, so that the placing of the metal product on the hanger 4 is also realized.

More specifically, the rolling bearing 9 arranged between the sliding sleeve 7 and the connecting sleeve 8 comprises two tapered roller bearings, at this time, the arrangement directions of the two tapered roller bearings are opposite and are respectively arranged at the upper end and the lower end of the sliding sleeve 7, and the connecting sleeve 8 needs to drive the sliding sleeve 7 to move in the axial direction of the driving shaft 3, so that the connecting sleeve 8 can receive larger axial force, and the two tapered roller bearings which are oppositely arranged can better adapt to the stress requirement of up-down movement, so that the structural design is more reasonable.

More specifically, be provided with on the lateral wall of work box 1 and open and close the door, the accessible is opened and is closed the door and is opened work box 1 to the last unloading operation of metal product has been made things convenient for, and structural design is more reasonable.

The surface treatment device for the metal product provided by the embodiment comprises a working box body 1, a driving motor 2, a driving shaft 3, a hanging rack 4, a sand box 5, a sand pump, a sand blasting pipeline 6, a sliding sleeve 7 and a connecting sleeve 8; through cover establish a sliding sleeve 7 on drive shaft 3, and it is spacing through slider 71 and spout 31 between sliding sleeve 7 and the drive shaft 3, and, sliding sleeve 7 passes through rolling bearing 9 to be connected on adapter sleeve 8, sliding sleeve 7's bottom is provided with a plurality of bracing pieces 82 of taking stores pylon 4, make drive shaft 3 can drive sliding sleeve 7 rotatory, simultaneously can drive sliding sleeve 7 through adapter sleeve 8 and do reciprocating motion along drive shaft 3's axial again, thereby realize the rotation of stores pylon 4 and the ascending and descending in the direction of height, thereby the change of the position in the direction of circumference and the direction of height of the metal product that has realized placing on stores pylon 4, thereby make the circumference and the direction of height homoenergetic on metal product surface evenly handled, surface treatment's effect has been promoted, metal product's quality has been promoted.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. The utility model provides a surface treatment device of metal product, work box, driving motor, drive shaft, stores pylon, sand box, sand pump, sandblast pipeline, the bottom of work box is provided with down the sand mouth, it is provided with to go down the sand mouth below the sand box, the sand box has through the pipe connection the sand pump, the sand pump passes through the pipe connection the sandblast pipeline, a plurality of sand blasting mouths have been seted up on the work box lateral wall, the sand blasting mouthful with sandblast pipeline intercommunication, driving motor set up in the top of work box, the drive shaft is vertical to be arranged and the upper end with driving motor connects, and the lower extreme extends to in the work box, its characterized in that still includes:

the connecting sleeve is coaxially sleeved outside the sliding sleeve, a rotating bearing is arranged between the connecting sleeve and the sliding sleeve, meanwhile, the connecting sleeve is connected with a push-pull rod of which one end extends to the outside of the working box body, and the other end of the push-pull rod is hinged with a telescopic driver arranged outside the working box body;

the bottom of sliding sleeve is provided with a plurality of edges along the bracing piece of axial arrangement of drive shaft on the outer edge, every on the bracing piece and along its length direction all the interval be provided with a plurality of the stores pylon, every all be provided with a plurality of stations of placing on the stores pylon.

2. The surface treatment device for metal products according to claim 1, wherein a poking rod is further arranged between the poking rod and the telescopic driver, the poking rod is in a Y-shaped arrangement, both sides of the connecting sleeve are connected with the poking rod, one ends of the two poking rods, which deviate from the connecting sleeve, are respectively hinged with both ends of a fork of the poking rod, simultaneously, the end head of a non-fork end of the poking rod is hinged with the telescopic driver, and the middle part of the non-fork end of the poking rod is hinged with the outer wall of the working box.

3. The surface treatment device for metal products according to claim 1, wherein a reinforcing ring is arranged at one end of the plurality of support rods facing away from the sliding sleeve, and the reinforcing ring is fixedly connected with the end part of each support rod.

4. The surface treatment device for metal products according to claim 1, wherein a plurality of locking holes are formed in the support rod, a fixing block is arranged at the end portion of one end of the hanger, a mounting hole corresponding to the locking hole is formed in the fixing block, and the mounting hole and the corresponding locking hole are locked through a bolt.

5. The surface treatment device for metal products according to claim 1, wherein the lower end of the chute extends to the bottom end of the driving shaft and communicates with the outside.

6. The surface treatment device for metal products according to claim 5, wherein a baffle plate is provided on an end surface of the bottom end of the driving shaft, a connection hole is provided on the end surface of the bottom end of the driving shaft, a fitting hole corresponding to the connection hole is provided on the baffle plate, a locking screw passes through the fitting hole and then is connected with the connection hole, and when the baffle plate is mounted on the end surface of the bottom end of the driving shaft, a side edge of the baffle plate blocks a notch of the chute.

7. The surface treatment device for metal products according to claim 1, wherein among the plurality of placing stations on the same hanger, two adjacent placing stations are arranged in a staggered manner in the height direction.

8. The surface treatment device of a metal product according to claim 1, wherein the placement station is a hanger or a receptacle.

9. The surface treatment device for metal products according to claim 1, wherein the rotating bearing comprises two tapered roller bearings, and the two tapered roller bearings are arranged in opposite directions and are respectively arranged at the upper end and the lower end of the sliding sleeve.

10. The surface treatment device for metal products according to claim 1, wherein an opening and closing door is provided on a side wall of the working tank.