Forming mechanism and forming process of stainless steel mesh basket

Abstract

The invention discloses a stainless steel mesh basket forming mechanism and a forming process thereof. The stainless steel mesh basket forming mechanism comprises a forming die and a die cavity. An annular groove for forming a convex ring at the bottom of the net basket is formed in the mold cavity; a nitriding assembly for nitriding the convex ring at the bottom of the mesh basket is arranged in the forming die and comprises a rotating ring and a laser head which is arranged on the rotating ring and is always matched with the annular groove when the rotating ring rotates; a nitrogen pipe rotating synchronously with the laser head is arranged on the rotating ring, nitrogen is introduced into the annular groove through the nitrogen pipe after the convex ring at the bottom of the mesh basket is formed, and laser nitriding is conducted on the surface of the convex ring through the laser head; according to the forming mechanism and the forming process of the stainless steel mesh basket, the convex ring at the bottom of the mesh basket can be formed through the forming mechanism, and the formed convex ring is subjected to rapid nitriding treatment, so that the bottom of the mesh basket still has relatively high rigid strength and wear resistance after a supporting ring is omitted.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel mesh basket production technology, in particular to a stainless steel mesh basket forming mechanism and a forming process thereof. Background Art

[0002] The stainless steel mesh basket is a commonly used kitchen and bathroom appliance. Its main body is formed by a stainless steel mesh surface, and then a closed steel ring is made and installed on the upper edge of the formed mesh basket. It not only shapes the upper edge of the mesh basket but also has a protective effect.

[0003] The bottom of the stainless steel mesh basket needs to have a certain rigidity. In the existing production process, after the mesh basket is formed, a support ring needs to be made and welded to the outer edge of the bottom to make the mesh basket have better support rigidity and wear resistance when in use. For example, the Chinese patent No. CN306016976S discloses such a stainless steel mesh basket. However, such a mesh basket has the following disadvantages and shortcomings: The mesh basket needs to be fixed to the support ring at the bottom after forming, which is not only complicated in process, but also consumes the material of the support ring, increasing the production cost; In addition, the process of riveting the mesh basket to the closing steel ring at the upper end must be carried out after forming, and the upper end of the mesh basket is very easy to deform during circulation, which increases the difficulty of positioning in the subsequent riveting fixture, prolongs the production time, and is not conducive to improving production efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a stainless steel mesh basket forming mechanism and a forming process thereof, thereby eliminating the bottom support ring in the conventional mesh basket, and nitriding the convex ring at the bottom of the mesh basket to improve its rigidity and wear resistance.

[0005] In order to solve the above technical problems, the present invention solves them through the following technical solutions: a forming mechanism for a stainless steel mesh basket, including a forming die and a die cavity.

[0006] In the above solution, preferably, an annular groove for forming a convex ring at the bottom of the basket is provided in the mold cavity; The molding die is provided with a nitriding assembly for nitriding the convex ring at the bottom of the basket, and the nitriding assembly includes a rotating ring and a laser head arranged on the rotating ring and always cooperating with the annular groove when the rotating ring rotates; The rotating ring is provided with a nitrogen pipe which rotates synchronously with the laser head. The nitrogen pipe introduces nitrogen into the annular groove after the convex ring at the bottom of the basket is formed, and performs laser nitriding on the surface of the convex ring through the laser head.

[0007] In the above scheme, preferably, a mold core is provided in the molding die, and the annular groove is provided between the mold core and the molding die.

[0008] In the above scheme, preferably, a support column matched with the rotating ring is provided in the molding die, and the rotating ring is rotatably arranged on the support column and connected to the laser head through an extension arm.

[0009] In the above solution, preferably, the support column is provided with a driving motor, the driving motor is connected to a driving gear, and the rotating ring is provided with a transmission tooth meshing with the driving gear.

[0010] In the above scheme, preferably, the laser emitted by the laser head is a high-energy laser beam, and the diameter of the spot reaching the surface of the convex ring is φ1.5mm-φ5mm.

[0011] In the above scheme, preferably, it includes an upper punch, and the upper punch is provided with a protrusion for forming a protruding ring at the bottom of the basket.

[0012] In the above scheme, preferably, an ejection assembly is provided in the mold core, and the ejection assembly includes an ejection push rod and an ejector block.

[0013] In the above scheme, preferably, a cutting assembly is included, wherein the cutting assembly includes a plurality of cutters evenly distributed around the circumference and a transverse push rod for driving the cutters to move transversely; The cutter is an annular cutter, and the diameter of its cutting edge is the same as the outer diameter of the upper opening of the basket.

[0014] In the above scheme, preferably, a forming process of a stainless steel mesh basket forming mechanism for making a mesh basket is as follows: S1: placing the stainless steel mesh in the mold cavity of the forming mold for forming, and the stainless steel mesh forms a convex ring at the bottom of the mesh basket through the annular groove in the mold cavity; S2: The laser head is started, and at the same time, the nitrogen pipe sprays nitrogen into the annular groove so that the nitrogen contacts the surface of the convex ring; S3: The rotating ring drives the laser head to rotate 360°, and the laser head heats the surface of the convex ring at high temperature. At the same time, because the annular groove is filled with nitrogen, the surface of the convex ring is nitrided to improve the rigidity and wear resistance of the convex ring surface.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a forming mechanism and a forming process for a stainless steel mesh basket, through which the convex ring at the bottom of the mesh basket can be formed, and the formed convex ring can be quickly nitrided, so that the bottom of the mesh basket still has higher rigidity and wear resistance after the support ring is omitted, and at the same time, the nitriding process is simplified, thereby improving the production efficiency of the mesh basket. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the forming mold of the present invention.

[0017] Figure 2 For the present invention Figure 1Schematic diagram of the enlarged structure of the nitriding component at A in the middle.

[0018] Figure 3 It is a cross-sectional view of the assembly of the forming die, upper punch, ejection assembly and cutting assembly of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the clamp assembly of the present invention.

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the mesh basket after forming. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 6 A forming mechanism for a stainless steel mesh basket includes a forming die 1 and a die cavity 101. An upper punch 3 matching the die cavity 101 is provided above the forming die 1. In this embodiment, a circular stainless steel mesh basket is taken as an example.

[0023] In order to form a convex ring at the bottom of the basket after forming, an annular groove 102 is provided at the bottom of the mold cavity 1, and a convex portion 301 is provided on the lower end surface of the upper punch 3. After the stainless steel mesh is placed on the upper end surface of the forming mold 1, the upper punch 3 is started to press down to press the stainless steel mesh into the mold cavity 101 of the forming mold 1, thereby forming Figure 6 The basket of the shape shown is a basket with a convex ring formed at the bottom.

[0024] The molding die 1 is a split die, and a mold core 103 is disposed at the center thereof. The mold core 103 is preferably cylindrical in shape, and its outer circle is separated from the bottom mold cavity of the molding die 1 by an annular groove 102. Figure 1-Figure 2 As shown, the annular groove 102 is provided between the mold core 103 and the forming mold 1, the mold core 103 is fixedly connected to the lower bottom plate through the support column 104, and the lower bottom plate is fixedly connected to the lower end surface of the forming mold 1 to form a complete forming mold.

[0025] The molding die 1 is provided with a receiving cavity 107 for receiving the supporting column 104 , and the annular groove 102 penetrates into the receiving cavity 107 and is in communication with the cavity.

[0026] The accommodating cavity 107 is provided with a nitriding component 2 for nitriding the convex ring at the bottom of the basket. The nitriding component 2 includes a rotating ring 201 and a laser head 202 arranged on the rotating ring 201 and always cooperating with the annular groove 102 when the rotating ring 201 rotates. Specifically, the rotating ring 201 is rotatably arranged on the support column 104, and the inner ring of the rotating ring 201 is connected to the support column 104 through a bearing. An extension arm 204 is fixedly provided on the outer wall of the rotating ring 201, and one end of the extension arm 204 is fixedly connected to the rotating ring 201, and the other end is fixedly provided with a laser head 202.

[0027] After the laser head 202 is started, its laser beam is vertically arranged in the annular groove 102, and is preferably located at the neutral circle of the annular groove 102. When the rotating ring 201 rotates, the laser head 202 is driven to rotate around the center of the mold core 103 in the forming mold 1 through the extension arm 204, so that the laser beam of the laser head 202 is always in the annular groove 102 when it rotates, and the convex ring corresponding to the upper side of the annular groove 102 in the formed stainless steel mesh basket is quickly heated.

[0028] The rotating ring 201 is provided with a nitrogen pipe 203 that rotates synchronously with the laser head 202. Preferably, the nitrogen pipe 203 is fixed on one side of the laser head 202, and the blowing direction of the nitrogen pipe 203 is the direction of the annular groove 102. The nitrogen pipe 203 is sprayed with high-pressure nitrogen through an air pump. After the convex ring at the bottom of the basket is formed, the nitrogen pipe 203 introduces nitrogen into the annular groove 102, and the laser nitriding treatment is realized after the surface of the convex ring is rapidly heated by laser through the laser head 202.

[0029] The support column 104 is fixedly provided with a driving motor 105, and the output shaft end of the driving motor 105 is provided with a driving gear 106. The outer wall of the lower end of the rotating ring 201 is provided with a transmission tooth 205, and the transmission tooth 205 is meshed with the driving gear 106. When the driving motor 105 is powered on and started, the rotating ring 201 is driven by the transmission tooth 205 to rotate around the center of the support column 104, so that the laser head 202 and the nitrogen pipe 203 are rotated around the center of the support column 104, and the automatic nitriding treatment of the basket convex ring corresponding to the annular groove 102 is realized, thereby improving the automation degree of the entire forming mechanism.

[0030] The laser emitted by the laser head 202 is a high-energy laser beam, and the spot diameter reaching the surface of the convex ring is φ1.5mm-φ5mm, which can be adaptively adjusted according to the molding width of the convex ring. The power of the laser head 202 is preferably 2KW-10KW; the nitrogen injection pressure of the nitrogen pipe 203 is 1.5-3bar; the rotation linear speed of the laser head 202 is 2mm / s-15mm / s, which can be adaptively adjusted according to the number of revolutions of the laser head 202 and the intensity required for nitriding.

[0031] In order to enable the upper opening of the net basket to be directly cut off after forming to save working procedures, the present embodiment also includes a cutting assembly 5, which includes a plurality of cutters 501 evenly distributed around the circumference and a transverse push rod 502 for driving the cutters 501 to move laterally. The transverse push rod 502 can be an electric push rod or a pneumatic push rod, and its cylinder seat can be fixed on a frame outside the forming mold 1; the cutter 501 is an annular cutter, and its cutting edge diameter is the same as the outer diameter of the upper opening of the net basket. In the present embodiment, the cutters 501 can be evenly arranged in 4 groups, and they are 90° fan-shaped arc cutters, and the cutting edges of the cutters are flush with the upper end surface of the forming mold 1; when the 4 groups of cutters 501 slide toward the center of the forming mold 1, a complete annular cutting circle is formed.

[0032] After the upper punch 3 presses the stainless steel mesh into the die cavity 101, the upper cylinder is placed above the upper end surface of the forming die 1, and then the transverse push rod 502 is started to move the cutter 501 horizontally toward the outer wall of the upper punch 3, thereby cutting off the excess stainless steel mesh above the upper end surface of the forming die 1, so that a complete stainless steel mesh basket is formed in the die cavity 101 of the forming die 1.

[0033] The mold core 103 is provided with an ejector assembly 4, and the ejector assembly 4 includes an ejector push rod 401 and an ejector block 402; specifically, the mold core 103 is provided with an ejector cavity, the ejector push rod 401 is placed in the ejector cavity, the ejector block 402 is fixed to the upper end of the ejector push rod 401, and in the initial molding state, the ejector block 402 and the mold core 103 are integrated into one, and the connection gap thereof can be ignored when the stainless steel mesh basket is molded. After the stainless steel mesh basket is molded and the excess material is cut off by the cutting assembly 5, the ejector push rod 401 is started to eject the molded mesh basket upward out of the mold cavity 101 through the ejector block 402, so that the upper opening of the mesh basket is higher than the upper end surface of the molding mold 1; Subsequently, the nitriding component 2 starts to perform nitriding treatment on the outer bottom surface of the basket convex ring corresponding to the annular groove 102 .

[0034] In order to improve the manufacturing efficiency of the mesh basket by utilizing the nitriding treatment time after forming, a clamp assembly 6 for installing a steel ring 7 on the upper mouth of the mesh basket is provided on one side of the forming mechanism. The clamp assembly 6 is connected to a manipulator, and the clamp assembly 6 can be moved to the top of the forming mold 1 through the displacement setting of the manipulator.

[0035] The clamp assembly 6 includes a multi-jaw chuck 601 and a positioning plate 602 for positioning the steel ring 7. The positioning plate 602 is fixed at the center of the multi-jaw chuck 601, and its outer circle is circular. A plurality of adsorption holes 604 are provided on the outer circle side wall of the positioning plate 602, and a limiting plate 603 is fixed on the upper end face of the positioning plate 602. When the steel ring 7 is placed on the positioning plate 602, the inner wall of the steel ring 7 is adsorbed through the adsorption holes 604. At the same time, the arc surface of the upper end of the steel ring 7 is limited due to the limiting of the limiting plate 603.

[0036] The lower opening of the steel ring 7 is a U-shaped notch that matches the upper opening of the stainless steel mesh basket. The clamp assembly 6 can be moved to the upper opening of the stainless steel mesh basket by the displacement of the manipulator, so that the upper opening of the stainless steel mesh basket is inserted into the U-shaped notch of the lower opening of the steel ring 7.

[0037] The multi-jaw chuck 601 is an electric chuck, on which a plurality of movable clamping blocks 605 are arranged. The movable clamping blocks 605 can be moved toward or away from the center of the chuck by being driven by the motor of the electric chuck. This is the prior art of the electric chuck and will not be elaborated on here. The clamping block 605 is fixed with a pressure block 606 on the side facing the outer surface of the steel ring 7. When the steel ring 7 is sleeved on the upper mouth of the stainless steel mesh basket, the multi-jaw chuck 601 is started to move the clamping block 605 toward the center of the chuck, so that the pressure block 606 is pressed against the outer surface of the steel ring 7, so that the outer surface of the steel ring 7 is deformed and riveted to the stainless steel mesh basket.

[0038] In this embodiment, the number of movable blocks 605 of the multi-claw chuck 601 is at least 3 groups, and they are evenly distributed around the circumference. The specific number can be set according to the number of anchor points between the steel ring 7 and the stainless steel basket, and no further details are given here.

[0039] A forming process for a stainless steel mesh basket is as follows: S1: placing the stainless steel mesh in the die cavity 101 of the forming die 1 for forming, the upper punch 3 slides down, and the stainless steel mesh passes through the annular groove 102 in the die cavity 101 to form a convex ring at the bottom of the mesh basket; S2: Subsequently, the cutting assembly 5 is started, and the excess material on the basket is cut off by the cutter 501; S3: the upper punch 3 is lifted upward, and at the same time, the ejection assembly 4 is started, and the formed basket is ejected a certain distance through the ejection block 402; S4: The laser head 202 is started, and at the same time, the nitrogen pipe 203 sprays nitrogen into the annular groove 102 so that the nitrogen contacts the surface of the convex ring; S5: The rotating ring 201 drives the laser head 202 to rotate 360°, and the laser head 202 heats the surface of the convex ring at high temperature. At the same time, because the annular groove 102 is filled with nitrogen, the surface of the convex ring is nitrided to improve the rigidity and wear resistance of the surface of the convex ring; S6: While the S4 laser head 202 is started to perform nitriding operation on the convex ring, the clamp assembly 6 is moved to the upper mouth of the stainless steel mesh basket by the robot, and the upper mouth of the stainless steel mesh basket is placed in the U-shaped groove of the steel ring 7. While nitriding, the multi-jaw chuck 601 is started to move the clamping block 605 toward the center of the chuck, so that the pressure block 606 is pressed against the outer surface of the steel ring 7, so that the outer surface of the steel ring 7 is deformed and then riveted to the stainless steel mesh basket, completing the manufacture of the entire stainless steel mesh basket.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stainless steel mesh basket forming mechanism, comprising a forming die (1) and a die cavity (101), characterized in that: The mold cavity (101) is provided with an annular groove (102) for forming a convex ring at the bottom of the basket; The molding die (1) is provided with a nitriding assembly (2) for nitriding the convex ring at the bottom of the basket, and the nitriding assembly (2) comprises a rotating ring (201) and a laser head (202) which is arranged on the rotating ring (201) and always cooperates with the annular groove (102) when the rotating ring (201) rotates; The rotating ring (201) is provided with a nitrogen pipe (203) that rotates synchronously with the laser head (202). The nitrogen pipe (203) introduces nitrogen into the annular groove (102) after the convex ring at the bottom of the basket is formed, and performs laser nitriding on the surface of the convex ring through the laser head (202).

2. A stainless steel mesh basket forming mechanism according to claim 1, characterized in that: A mold core (103) is provided in the molding mold (1), and the annular groove (102) is provided between the mold core (103) and the molding mold (1).

3. A stainless steel mesh basket forming mechanism according to claim 1 or 2, characterized in that: A support column (104) matched with a rotating ring (201) is provided in the molding die (1); the rotating ring (201) is rotatably disposed on the support column (104) and is connected to the laser head (202) via an extension arm (204).

4. A stainless steel mesh basket forming mechanism according to claim 3, characterized in that: The support column (104) is provided with a driving motor (105), the driving motor (105) is connected to a driving gear (106), and the rotating ring (201) is provided with a transmission tooth (205) meshing with the driving gear (106).

5. A stainless steel mesh basket forming mechanism according to claim 1, characterized in that: The laser emitted by the laser head (202) is a high-energy laser beam, and the diameter of the light spot reaching the surface of the convex ring is φ1.5 mm-φ5 mm.

6. A stainless steel mesh basket forming mechanism according to claim 1, characterized in that: It comprises an upper punch (3), on which a convex portion (301) for forming a convex ring at the bottom of the mesh basket is provided.

7. A stainless steel mesh basket forming mechanism according to claim 2, characterized in that: An ejection assembly (4) is provided in the mold core (103), and the ejection assembly (4) comprises an ejection push rod (401) and an ejection block (402).

8. A stainless steel mesh basket forming mechanism according to claim 1, characterized in that: The cutting assembly (5) comprises a plurality of cutting knives (501) evenly distributed around a circumference and a transverse push rod (502) for driving the cutting knives (501) to move transversely; The cutter (501) is an annular cutter, and the diameter of its cutting edge is the same as the outer diameter of the upper opening of the basket.

9. A forming process for making a mesh basket using a forming mechanism for a stainless steel mesh basket as claimed in claim 1, characterized in that: The process is as follows: S1: placing a stainless steel mesh in a mold cavity (101) of a molding mold (1) for molding, wherein the stainless steel mesh is molded into a convex ring at the bottom of the mesh basket through an annular groove (102) in the mold cavity (101); S2: The laser head (202) is started, and at the same time, the nitrogen pipe (203) sprays nitrogen into the annular groove (102) so that the nitrogen contacts the surface of the convex ring; S3: The rotating ring (201) drives the laser head (202) to rotate 360 ​​degrees, and the laser head (202) heats the surface of the convex ring at a high temperature. At the same time, since the annular groove (102) is filled with nitrogen, the surface of the convex ring is nitrided, thereby improving the rigidity and wear resistance of the surface of the convex ring.

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