A high-stability metal treatment agent and metal surface processing device

Abstract

The invention discloses a high-stability metal treatment agent and a metal part surface processing device, and relates to the technical field of metal surface treatment. A high-stability metal treatment agent includes copper sulfate, selenious acid, phosphoric acid, organic acid, sodium dodecyl sulfate, and composite additives. The mass percentage of each component is as follows: 5-10% copper sulfate, 10-20% selenious acid, 20-40% phosphoric acid, 10-15% organic acid, 1-1.5% sodium dodecyl sulfate, and 30-50% composite additives. In the above technical scheme, the film-forming agent is oxidized by copper sulfate, and the pH value is adjusted by using selenious acid, phosphoric acid, and organic acid, so that copper sulfate ions will undergo an oxidation-reduction reaction with sodium dodecyl sulfate on the metal surface, thereby forming a black oxide film of good quality on the surface of the workpiece, and the oxide film has good wear resistance, can reduce friction, surface cracks, and thus extend the service life of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface treatment, in particular to a high-stability metal treatment agent and a metal part surface processing device. Background Art

[0002] A high-stability metal treatment agent mainly includes three categories: cleaning agent, rust inhibitor, and phosphating solution. Common metal surface treatments include: blackening / blueing, oiling, Dacromet, etc., and also modifying the metal surface from a physical level, through carburizing, nitriding, electroplating, etc.

[0003] Blackening treatment is to immerse the metal in blackening liquid (a highly stable metal treatment agent), which reacts chemically on the metal surface to form a black oxide film. Currently, blackening is divided into room temperature blackening and high temperature boiling blackening. Room temperature blackening has the characteristics of low energy consumption and low cost, but the oxide film it forms is low in strength and easy to fall off, which is a certain gap compared to high temperature boiling blackening. Summary of the invention

[0004] The object of the present invention is to provide a high-stability metal treatment agent and a metal surface processing device to solve the deficiencies in the above-mentioned prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: a high-stability metal treatment agent, comprising copper sulfate, selenious acid, phosphoric acid, organic acid, sodium dodecyl sulfate, and a composite additive, wherein the mass percentage of each component is as follows: 5-10% copper sulfate, 10-20% selenious acid, 20-40% phosphoric acid, 10-15% organic acid, 1-1.5% sodium dodecyl sulfate, and 30-50% composite additive.

[0006] Preferably, the composite additive is composed of styrene acrylic emulsion, carbon black, chrome black and pure water, and the mass percentage of each component of the composite additive is as follows: styrene acrylic emulsion 5-10%, carbon black 5-10%, chrome black 10-20% and pure water 70-80%.

[0007] Preferably, the pH of a high stability metal treatment agent is 2.0-2.5.

[0008] Preferably, the method comprises the following steps:

[0009] Step 1, use a high-efficiency degreasing agent to remove oil at medium temperature, and then wash with water;

[0010] Step 2, activating with a rust activator for 2-15 minutes, and then washing with water;

[0011] Step 3, the workpiece is placed in the processing device, and the processing device controls the workpiece to move downward so that the workpiece is immersed in the blackening liquid prepared by a high-stability metal treatment agent for 2-5 minutes, and then rinsed with running water for 1 minute;

[0012] Step 4: After dehydration, immerse in anti-rust oil for 5 minutes.

[0013] A metal part surface processing device, the processing device comprising:

[0014] A box body, wherein a bracket is fixedly installed in the box body, and a storage rack is movably connected to the bracket, and the storage rack is used for placing workpieces;

[0015] Wherein, the rack has a first position when it is above the blackening liquid, and has a second position when it is completely immersed in the blackening liquid;

[0016] A hoisting mechanism, which drives the rack to move by the hoisting mechanism, so that the rack can be switched between the first position and the second position;

[0017] The turning structure is used to drive the workpiece to rotate;

[0018] The linkage structure is such that when the rack is switched from the first position to the second position, the rack rotates clockwise, and the linkage structure and the turning structure are transmission-connected to enable the workpiece to rotate passively.

[0019] Preferably, a slide groove is provided on the bracket, one end of the storage rack is rotatably connected to a second shaft rod, the end of the second shaft rod is rotatably connected to a slider, and the slider is slidably connected in the slide groove.

[0020] Preferably, the material turning structure includes a first shaft and a sleeve, the first shaft is rotatably connected to the storage rack, and the sleeve is fixedly sleeved on the outside of the first shaft.

[0021] Preferably, the linkage structure includes a first gear, a second gear, a third shaft, a passive gear, a driving gear, a third gear and a rack, the first gear and the third gear are both fixedly mounted on the second shaft, the third shaft is rotatably connected to the rack, the second gear and the driving gear are both mounted on the third shaft, the passive gear is fixedly mounted on the end of the first shaft, the first gear and the second gear are meshed, the driving gear and the passive gear are meshed, and the rack is arranged on the moving path of the third gear.

[0022] Preferably, the lifting mechanism includes a frame, a transmission shaft, a driving motor, a reel and a connecting rope, the transmission shaft is rotatably connected to the frame, the driving motor is used to drive the transmission shaft to rotate, the reel is fixedly mounted on the transmission shaft, and the storage rack and the reel are connected by a connecting rope.

[0023] Preferably, it comprises a limiting roller, which is rotatably connected to the storage rack, and when in the first position and the second position, the limiting roller is in conflict with the outside of the bracket.

[0024] In the above technical scheme, the present invention provides a high-stability metal treatment agent and a metal surface processing device, which uses copper sulfate to oxidize the film-forming agent and is combined with selenious acid, phosphoric acid, and an organic acid to adjust the pH value, so that copper sulfate ions will undergo an oxidation-reduction reaction with sodium dodecyl sulfate on the metal surface, thereby forming a high-quality black oxide film on the surface of the workpiece. The oxide film has good wear resistance, can reduce friction and surface cracks, and thus extend the service life of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of a high-stability metal treatment agent and a metal surface processing device of the present invention;

[0027] Figure 2 The invention provides a high stability metal treatment agent and an accessory for a metal surface processing device. Figure 1 The enlarged schematic diagram of point A in the middle;

[0028] Figure 3 It is a structural schematic diagram of a storage rack of a high-stability metal treatment agent and a metal surface processing device of the present invention when it is in a second state;

[0029] Figure 4 The invention provides a high stability metal treatment agent and an accessory for a metal surface processing device. Figure 3 The schematic diagram of the structure after the enlargement of B in the middle;

[0030] Figure 5 This is a schematic diagram of the linkage structure of a high-stability metal treatment agent and a metal surface processing device of the present invention;

[0031] Figure 6 This is a schematic diagram of a rack structure of a high-stability metal treatment agent and a metal surface processing device of the present invention;

[0032] Figure 7 The present invention is a schematic diagram of a material turning structure of a high-stability metal treatment agent and a metal surface processing device.

[0033] Description of reference numerals:

[0034] 1. Box body; 2. Material turning structure; 21. First shaft rod; 22. Sheath; 23. Fixed block; 3. Bracket; 31. Slide groove; 4. Storage rack; 41. Second shaft rod; 42. Slider; 5. Linkage structure; 51. First gear; 52. Second gear; 53. Third shaft rod; 54. Passive gear; 55. Active gear; 56. Third gear; 57. Rack; 571. Support block; 6. Limit roller; 7. Hoisting mechanism; 71. Frame; 72. Transmission shaft; 73. Driving motor; 74. Reel; 75. Connecting rope. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See also Figure 1-7 A high-stability metal treatment agent provided by an embodiment of the present invention includes copper sulfate, selenious acid, phosphoric acid, organic acid, sodium dodecyl sulfate, and a composite additive. The mass percentage of each component is as follows: 5-10% copper sulfate, 10-20% selenious acid, 20-40% phosphoric acid, 10-15% organic acid, 1-1.5% sodium dodecyl sulfate, and 30-50% composite additives.

[0037] The composite additive is composed of styrene-acrylic emulsion, carbon black, chrome black and pure water. The mass percentage of each component of the composite additive is as follows: 5-10% of styrene-acrylic emulsion, 5-10% of carbon black, 10-20% of chrome black and 70-80% of pure water.

[0038] A high stability metal treatment agent with a pH of 2.0 to 2.5.

[0039] In the present invention, copper sulfate is used as the film-forming agent, and selenious acid, phosphoric acid and organic acid are used to adjust the pH value, so that copper sulfate ions react with sodium dodecyl sulfate on the metal surface to form a black oxide film of good quality on the surface of the workpiece. The oxide film has good wear resistance, can reduce friction and surface cracks, and thus prolong the service life of the workpiece.

[0040] The following steps are involved:

[0041] Step 1, use a high-efficiency degreasing agent to remove oil at medium temperature, and then wash with water;

[0042] Step 2, activating with a rust activator for 2-15 minutes, and then washing with water;

[0043] Step 3, the workpiece is placed in the processing device, and the processing device controls the workpiece to move downward so that the workpiece is immersed in the blackening liquid prepared by a high-stability metal treatment agent for 2-5 minutes, and then rinsed with running water for 1 minute;

[0044] Step 4: After dehydration, immerse in anti-rust oil for 5 minutes.

[0045] When blackening a cylindrical workpiece, some columns have screw holes that are not through and are blind holes. Therefore, the technology requires lubricating oil when the tap is used for tapping. A certain amount of oil will remain in the blind hole after tapping. Therefore, in the prior art, although the workpiece is degreased and washed with water before blackening, there will still be residue in the blind hole. Since the blackening liquid does not have fluidity after filling the screw hole, the blackening effect of the blackening liquid on the inside of the screw hole is not good. In addition, since the inside of the screw hole is irregular, the blackening quality is poorer than that of the smooth surface. The residue in the screw hole further affects the blackening quality. Therefore, we propose a surface processing device for metal parts. By improving the processing device, the influence of oil pollution inside the screw hole on the oxide film can be reduced.

[0046] A metal part surface processing device, the processing device comprising:

[0047] A box body 1, wherein a bracket 3 is fixedly installed in the box body 1, and a storage rack 4 is movably connected to the bracket 3, and the storage rack 4 is used for placing workpieces;

[0048] The rack 4 has a first position when it is above the blackening liquid, and has a second position when it is completely immersed in the blackening liquid.

[0049] A hoisting mechanism 7, which drives the storage rack 4 to move, so that the storage rack 4 switches between the first position and the second position;

[0050] The turning structure 2 is used to drive the workpiece to rotate;

[0051] The linkage structure 5, when the storage rack 4 is switched from the first position to the second position, the storage rack 4 rotates clockwise, and the linkage structure 5 is transmission-connected with the turning structure 2, so that the workpiece rotates passively.

[0052] When the rack 4 is in the first state, the workpiece is placed on the rack 4, and the screw holes of the workpiece need to face downward. Figure 1As shown, the rack 4 is gradually loosened by the hoisting mechanism 7, and the rack 4 will move downward after losing the pulling force. During the displacement, the rack 4 will flip at an angle so that the end of the workpiece with the screw hole is lifted upward, so that when immersed in the blackening liquid, the blackening liquid can quickly flow into the screw hole to blacken the screw hole. After reaching the second position, it is immediately pulled upward and driven by the hoisting assembly to move the rack 4 upward. The rack 4 moves upward from the second position and switches to the first position. At the first position, the screw hole end of the workpiece is downward. At this time, the blackening liquid in the screw hole flows out. The discharge of the blackening liquid can further reduce the residual oil in the screw hole and improve the blackening quality.

[0053] The turning structure 2 and the linkage structure 5 are connected by transmission. When the rack 4 is switched between the first position and the second position, the workpiece is passively driven to rotate by the movement of the rack 4, so that the workpiece is in a rotating state. The workpiece is in a rotating state, so that the contact point between the workpiece and the turning structure 2 is always changing. In this way, the situation where the contact point is not blackened due to the inconvenience of the contact point between the workpiece and the turning structure 2 can be avoided, thereby greatly improving the uniformity of the blackening of the workpiece surface.

[0054] In this embodiment, please refer to Figure 2 A slide groove 31 is provided on the bracket 3 , one end of the storage rack 4 is rotatably connected to a second shaft rod 41 , an end of the second shaft rod 41 is rotatably connected to a slider 42 , and the slider 42 is slidably connected in the slide groove 31 .

[0055] The second shaft rod 41 and the storage rack 4 can only rotate but not axially displace, and the slider 42 can only displace along the opening direction of the slide groove 31. When the lifting mechanism 7 pulls the storage rack 4 upward, the end of the storage rack 4 away from the second shaft rod 41 tilts upward. When the lifting mechanism 7 releases the storage rack 4, the storage rack 4 first moves downward under the action of gravity and flips synchronously. The storage rack 4 moves downward so that the workpiece can be immersed in the blackening liquid. When the storage rack 4 flips, the workpiece placed thereon will flip synchronously. In this way, the end of the workpiece with the threaded hole will tilt upward. In this way, after the workpiece is immersed in the blackening liquid, the blackening liquid can smoothly enter the threaded hole to blacken the threaded hole.

[0056] See also Figure 5 The material turning structure 2 includes a first shaft rod 21 and a sheath 22 . The first shaft rod 21 is rotatably connected to the storage rack 4 , and the sheath 22 is fixedly sleeved on the outside of the first shaft rod 21 .

[0057] First, a pair of first shafts 21 are respectively arranged on both sides of the workpiece, and the workpiece is supported by the first shaft 21 and the sleeve 22. At this time, the workpiece only makes point contact with the sleeve 22. During the downward movement of the rack 4, the first shaft 21 is passively rotated by the linkage of the linkage structure 5, so that the sleeve 22 can be driven to rotate synchronously. When the sleeve 22 is in contact with the workpiece, the workpiece can be driven to rotate synchronously when the sleeve 22 rotates. In this way, the contact point between the workpiece and the sleeve 22 is always in a changing state. Compared with traditional clamping, suspension and other methods with fixed contact points, the movable contact point reduces the influence on film formation, which further improves the blackening quality.

[0058] In the embodiments of the present invention, please refer to Figure 1-4 The linkage structure 5 includes a first gear 51, a second gear 52, a third shaft 53, a passive gear 54, a driving gear 55, a third gear 56 and a rack 57. The first gear 51 and the third gear 56 are both fixedly mounted on the second shaft 41. The third shaft 53 is rotatably connected to the storage rack 4. The second gear 52 and the driving gear 55 are both mounted on the third shaft 53. The passive gear 54 is fixedly mounted on the end of the first shaft 21. The first gear 51 and the second gear 52 are meshed, the driving gear 55 and the passive gear 54 are meshed, and the rack 57 is arranged on the moving path of the third gear 56.

[0059] The first gear 51 is fixedly sleeved on the second shaft rod 41, and the third gear 56 is fixedly installed at the end of the second shaft rod 41. In this way, the first gear 51 and the third gear 56 are coaxially installed. Therefore, the first gear 51, the third gear 56 and the second shaft rod 41 can rotate synchronously. The second shaft rod 41 is rotatably connected to the storage rack 4. Therefore, when the storage rack 4 switches from the first position to the second position, the movement of the storage rack 4 can synchronously drive the second shaft rod 41 to move. Synchronously, the first gear 51 and the third gear 56 will also move synchronously, and the rack 57 is set on the moving stroke of the third gear 56. When the third gear 56 is displaced in the vertical direction, the third gear 56 and the rack 57 are meshed. Under the action of the meshing force, the third gear 56 will rotate, and through the second shaft Due to the transmission effect of the rod 41, the first gear 51 will rotate synchronously, and the first gear 51 and the second gear 52 are meshed, and the second gear 52 and the driving gear 55 are coaxially installed. Therefore, when the second gear 52 rotates, it will synchronously drive the driving gear 55 to rotate, and the driving gear 55 and the passive gear 54 are meshed, and the passive gear 54 will rotate synchronously. The passive gear 54 is fixedly installed on the first shaft 21. Therefore, the first shaft 21 will rotate. When the height of the shelf 4 changes, the linkage structure 5 is used to passively drive the first shaft 21 to rotate. The workpiece is placed on the sleeve 22, and the sleeve 22 is synchronously driven to rotate through the rotation of the first shaft 21, so that the contact point between the workpiece and the sleeve 22 is always in a changing state, thereby improving the film forming quality on the outside of the workpiece.

[0060] In the embodiments of the present invention, please refer to Figure 3 The hoisting mechanism 7 includes a frame 71, a transmission shaft 72, a driving motor 73, a reel 74 and a connecting rope 75. The transmission shaft 72 is rotatably connected to the frame 71. The driving motor 73 is used to drive the transmission shaft 72 to rotate. The reel 74 is fixedly installed on the transmission shaft 72. The storage rack 4 and the reel 74 are connected by a connecting rope 75.

[0061] The frame 71 is arranged along the vertical direction, and a bearing is arranged on the upper part of the frame 71. The transmission shaft 72 passes through the inner ring of the bearing so that the transmission shaft 72 is rotatably connected with the frame 71. The driving motor 73 is fixedly mounted on the frame 71. The output shaft of the driving motor 73 is connected to the transmission shaft 72 through a sprocket and a chain transmission. When the output shaft of the driving motor 73 rotates, the transmission shaft 72 can be synchronously driven to rotate. The reel 74 is fixedly mounted on the transmission shaft 72. A connecting rope 75 is wound around the outside of the reel 74, and the other end of the connecting rope 75 is connected to the The end of the storage rack 4, in this way, when the driving motor 73 rotates, the reel 74 can be driven to rotate synchronously, and the connecting rope 75 can be wound around the reel 74 or loosened from the reel 74 according to the different rotation directions. In this way, when the connecting rope 75 is unwound, the tension of the connecting rope 75 on the storage rack 4 disappears, and the storage rack 4 will move downward, and when the connecting rope 75 is wound, the connecting rope 75 is gradually tightened, and the storage rack 4 will move upward. In this way, the switching of the storage rack 4 between the first position and the second position is realized by the different rotation directions of the driving motor 73.

[0062] In the embodiments of the present invention, please refer to Figure 2 and Figure 4 , including a limiting roller 6, which is rotatably connected to the storage rack 4. When in the first position and the second position, the limiting roller 6 and the outer part of the bracket 3 are in conflict.

[0063] When the rack 4 is in the first position, the rack 4 is subjected to the pulling force of the connecting rope 75, and the end of the rack 4 close to the connecting rope 75 is tilted upward. At this time, the screw hole of the workpiece placed on the rack 4 is facing downward. When the rack 4 is subjected to the pulling force, in order to limit its tilting angle, a limiting roller 6 is rotatably set on the outer side of the rack 4. The limiting roller 6 will contact the outside of the bracket 3 in the first position, so that the maximum tilting angle of the rack 4 is limited by the setting of the limiting roller 6. The reel 74 is reversed, and the connecting rope 75 is unwound. After the connecting rope 75 is unwound, the rack 4 loses the pulling force, and the rack 4 will move downward to realize that the rack 4 is immersed in the blackening liquid.

[0064] In the embodiments of the present invention, please refer to Figure 4 A support block 571 is provided at the lower part of the rack 57. When the rack 4 is lowered to a certain height, the third gear 56 will abut against the support block 571. At this time, the height of the second shaft 41 remains unchanged, and the rack 4 will rotate clockwise with the second shaft 41 as the center, so that the end of the rack 4 with the connecting rope 75 switches from being tilted to being hung down. In this way, it can be ensured that the end of the workpiece with the screw hole is tilted upward to ensure that the blackening liquid can flow in smoothly.

[0065] In the embodiments of the present invention, please refer to Figure 7A fixing block 23 is fixedly installed at the end of the rack 4. The fixing block 23 is rotatably connected to the first shaft 21. The fixing block 23 limits the workpiece to prevent the workpiece from falling off when in the second position.

[0066] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A metal surface processing device, which is implemented based on a high-stability metal treatment agent, characterized in that: The following steps are involved: Step 1, use a high-efficiency degreasing agent to remove oil at medium temperature, and then wash with water; Step 2, activating with a rust activator for 2-15 minutes, and then washing with water; Step 3, the workpiece is placed in the processing device, and the processing device controls the workpiece to move downward so that the workpiece is immersed in the blackening liquid prepared by a high-stability metal treatment agent for 2-5 minutes, and then rinsed with running water for 1 minute; Step 4, after dehydration, immerse in anti-rust oil for 5 minutes; The processing device comprises: A box body (1), wherein a bracket (3) is fixedly installed inside the box body (1), and a storage rack (4) is movably connected to the bracket (3), and the storage rack (4) is used for placing workpieces; Wherein, the rack (4) has a first position when it is above the blackening liquid, and has a second position when the rack (4) is completely immersed in the blackening liquid; A lifting mechanism (7), which drives the storage rack (4) to move by means of the lifting mechanism (7), so that the storage rack (4) switches between a first position and a second position; A turning structure (2), which is used to drive the workpiece to rotate; The linkage structure (5) is such that when the storage rack (4) is switched from the first position to the second position, the storage rack (4) rotates clockwise, and the linkage structure (5) is transmission-connected to the material turning structure (2) so that the workpiece rotates passively; The bracket (3) is provided with a slide groove (31), one end of the storage rack (4) is rotatably connected to a second shaft rod (41), the end of the second shaft rod (41) is rotatably connected to a slider (42), and the slider (42) is slidably connected in the slide groove (31); The material turning structure (2) comprises a first shaft (21) and a sheath (22), wherein the first shaft (21) is rotatably connected to the storage rack (4), and the sheath (22) is fixedly sleeved on the outside of the first shaft (21); The linkage structure (5) comprises a first gear (51), a second gear (52), a third shaft (53), a passive gear (54), a driving gear (55), a third gear (56) and a rack (57); the first gear (51) and the third gear (56) are both fixedly mounted on the second shaft (41); the third shaft (53) is rotatably connected to the storage rack (4); the second gear (52) and the driving gear (55) are both mounted on the third shaft (53); the passive gear (54) is fixedly mounted on the end of the first shaft (21); the first gear (51) and the second gear (52) are meshed with each other; the driving gear (55) and the passive gear (54) are meshed with each other; and the rack (57) is arranged on the moving path of the third gear (56).

2. A metal surface processing device according to claim 1, characterized in that: The hoisting mechanism (7) comprises a frame (71), a transmission shaft (72), a driving motor (73), a reel (74) and a connecting rope (75); the transmission shaft (72) is rotatably connected to the frame (71); the driving motor (73) is used to drive the transmission shaft (72) to rotate; the reel (74) is fixedly mounted on the transmission shaft (72); and the storage rack (4) and the reel (74) are connected via a connecting rope (75).

3. A metal surface processing device according to claim 1, characterized in that: It comprises a limiting roller (6), wherein the limiting roller (6) is rotatably connected to the storage rack (4), and when in a first position and a second position, the limiting roller (6) and the outside of the bracket (3) are in conflict with each other.

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