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CN-121972553-A - Processing method of stainless steel tableware product

CN121972553ACN 121972553 ACN121972553 ACN 121972553ACN-121972553-A

Abstract

The invention provides a processing method of stainless steel tableware products, which comprises the following steps of S1, dividing a stamping area into A, B, C types according to depth, S2, stamping each stamping area of a blank to the same depth as the area A, S3, transferring the blank into a d2 set of middle-stage stamping die in middle-stage stamping to carry out step stamping of the area B, C, S4, transferring the blank into a final-stage stamping die to carry out final stamping forming of the area C, and S5, detecting and blanking. According to the invention, the stamping area is divided into A, B, C types according to the depth, the initial depth is unified by primary stamping, the depth of the B area is gradually increased by middle-stage stepped stamping, the C area is formed by final stamping, and the accurate stamping control can be realized for areas with different depths by combining with the pressure maintaining design of a block die, so that the rebound difference of the different areas can be effectively counteracted, the flatness and the forming precision of a product are improved, and the problem that the rebound compensation of the areas with multiple depths is difficult to consider in the traditional integral stamping is solved.

Inventors

  • Lu Chuangfeng

Assignees

  • 汕头市奇达餐具有限公司
  • 广东奇达餐具有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (9)

  1. 1. A method of processing a stainless steel cutlery product comprising the steps of: s1, dividing the area into an area A, an area B and an area C according to the stamping depth of the stamping area, wherein the area A is a plurality of stamping areas with the minimum depth, the area B is d1 middle areas between the minimum depth and the maximum depth, and the area C is a plurality of stamping areas with the maximum depth; S2, primary stamping, namely transferring the blank into a primary stamping die for stamping, and stamping each stamping area to the position with the same depth as the A area; s3, middle stage stamping, namely sequentially transferring the blanks subjected to primary stamping into d2 sets of middle stage stamping dies in middle stage stamping to perform step stamping in B, C areas, wherein the types and the numbers of different depths in d2 and B areas are consistent; d2, stamping the middle-stage stamping dies by adopting a block die, firstly maintaining the pressure of the stamping area reaching the required stamping depth by the middle-stage stamping dies, and stamping the stamping area not reaching the required stamping depth in the pressure maintaining period to achieve consistent stamping depth; The stamping depth of each set of middle-stage stamping die when stamping the stamping area which does not reach the required stamping depth is the same as the depth value with the minimum required stamping depth in the stamped area; S4, final stage stamping, namely transferring the intermediate blank subjected to the previous stage stamping into a final stage stamping die to carry out final stamping forming of a C region, wherein the final stage stamping die adopts a block die; The final stage stamping die firstly carries out pressure maintaining on a stamping area reaching the required stamping depth, and carries out stamping with consistent stamping depth on a stamping area not reaching the required stamping depth in the pressure maintaining period, wherein the stamping depth is the depth corresponding to the C area; s5, detecting and blanking.
  2. 2. A method of manufacturing a stainless steel cutlery product according to claim 1, S11, preheating the whole blank to the optimal stamping temperature required by the area A according to the ideal rebound quantity of the stamping area A with the minimum depth; S31, before stamping, each set of middle-stage stamping die supplements the temperature of the area B which does not reach the required stamping depth, and the temperature is supplemented to the optimal stamping temperature required by the stamping area B when the area B reaches the required stamping depth in the stamping stage; s41, the final stage stamping die is used for supplementing the temperature of the C area which does not reach the required stamping depth before stamping, and supplementing the temperature to the optimal stamping temperature required by the C area.
  3. 3. The method of claim 2, wherein step S3 further comprises step S32 of performing stepwise temperature compensation for the stamping area reaching the required stamping depth during the whole stepwise stamping process of the intermediate stamping die, wherein the temperature compensation amount is stepwise reduced, and the temperature compensation is completed before the pressing.
  4. 4. The method for processing the stainless steel tableware product according to claim 3, wherein the step S31 further comprises the steps of setting a connecting line of the central points of the adjacent stamping areas as a base line (2), setting a plurality of parallel lines (1) with a distance d3 based on the base line (2), setting two intersection points of the parallel lines (1) and the base line (2) with the adjacent side lines in the two stamping areas as temperature compensating points (4), setting the connecting line of the two temperature compensating points (4) as temperature compensating lines (3), and defining the lengths of the plurality of temperature compensating lines (3) as Li; In the temperature compensation process, parallel lines (1) where the median value in Li is located are taken as temperature compensation datum lines, the temperature of the temperature compensation is gradually increased towards the direction in which Li is smaller, the temperature of the temperature compensation is gradually reduced towards the direction in which Li is larger, and the temperature of the temperature compensation in the range where the temperature compensation datum lines are located is the optimal stamping temperature.
  5. 5. The method according to claim 4, wherein in step S312, a minimum value of the temperature compensating lines (3) corresponding to the base lines (2) passing through the center point of one punching area is set to Lmin, the temperature compensating step is performed in a range where the base lines (2) corresponding to the base lines (3) at Li≤1.5 Lmin are located, and the temperature compensating step is performed in a range where the base lines (2) corresponding to the base lines (2) at Li >1.5Lmin are located, with the optimum punching temperature as the center, until the optimum punching temperature is reached.
  6. 6. The method according to claim 4, wherein in step S312, the distance d3 is positively correlated with the length of the temperature compensating line (3) corresponding to the base line (2), and d3=a×d0×l/L0, wherein a is an adjustment coefficient, and d0 is a value of the distance d3 corresponding to the temperature compensating line (3) having the standard length L0.
  7. 7. The method according to claim 4, wherein in step S312, if the number of the temperature compensating lines (3) corresponding to the plurality of Li is greater than 1/2 of the number of the total temperature compensating lines (3), the temperature compensating temperature of the temperature compensating region corresponding to the temperature compensating line (3) having the length of Lj is set to be the optimum press temperature, and the remaining regions are based on Lj, and if the length of the temperature compensating line (3) in the region is greater, the temperature of the corresponding temperature compensating region is lower.
  8. 8. The method of manufacturing a stainless steel tableware article according to claim 1, wherein in step S3 and step S4, the holding pressure of the block mold is 1.1 to 1.3 times the stamping pressure of the corresponding region.
  9. 9. The method of claim 1, wherein in step S5, the detection contents include depth of the stamping area, flatness of the product, thickness of the plate, and surface defects, and the detection is passed, and then the product is fed, and the defective product is reworked or scrapped.

Description

Processing method of stainless steel tableware product Technical Field The invention relates to the technical field of stamping forming of metal plates, in particular to a processing method of stainless steel tableware products. Background Stainless steel tableware is widely applied to the catering field due to the characteristics of high structural strength, sanitation, safety, easy cleaning and the like, wherein the stainless steel cutlery and spoons are particularly suitable for covering daily life and various catering scenes, and the application scene is very wide. At present, a stamping forming process (namely, basically no cutting processing and stamping forming technology of a metal plate) is adopted for stainless steel tableware, and a plurality of sink groove forming structures with adapting function requirements are arranged on some stainless steel tableware bodies according to the containing or using functions of the stainless steel tableware bodies. In the actual stamping process, as the volume and the outline shape of different sinking grooves are different, and the forming depth of each sinking groove is different, the plastic deformation degree and the stress distribution of different areas of the plate are obviously different when the tableware is stamped and formed. The larger the sinking groove volume and the deeper the depth, the larger the rebound quantity of the region after stamping, and the smaller the sinking groove volume and the shallower the depth, the smaller the rebound quantity of the corresponding region. After stamping is completed, the rebound amounts of different areas of the plate are different due to inconsistent deformation degrees, so that the overall flatness of the tableware is difficult to guarantee, the flatness is poor, the forming precision and the appearance quality of the tableware are affected, and the product percent of pass and the production stability are reduced. In order to solve the problem of rebound, the conventional stamping technology generally adopts an integral die to perform one-time stamping forming, and generally adopts a moderate overspray mode to compensate in a region with larger rebound by experience so as to try to counteract partial rebound. However, the method still has the defects that on one hand, integral stamping cannot accurately control the partition of sinking grooves with different shapes and different depths, the degree of excessive stamping is difficult to accurately match the actual rebound quantity of each region, the situation of partial over-stamping or insufficient compensation is easy to occur, the flatness is still difficult to stably ensure, on the other hand, the excessive stamping is easy to cause the partial thinning, wrinkling and even cracking of the plate, the structural strength and the service life of tableware are influenced, and the requirement of large-scale production with high quality and high consistency is difficult to meet. Disclosure of Invention The object of the present invention is to provide a method for processing a stainless steel cutlery product which does not have at least one of the drawbacks mentioned above. In order to achieve the purpose, the invention provides the following technical scheme that the processing method of the stainless steel tableware product comprises the following steps: s1, dividing the area into an area A, an area B and an area C according to the stamping depth of the stamping area, wherein the area A is a plurality of stamping areas with the minimum depth, the area B is d1 middle areas between the minimum depth and the maximum depth, and the area C is a plurality of stamping areas with the maximum depth; S2, primary stamping, namely transferring the blank into a primary stamping die for stamping, and stamping each stamping area to the position with the same depth as the A area; s3, middle stage stamping, namely sequentially transferring the blanks subjected to primary stamping into d2 sets of middle stage stamping dies in middle stage stamping to perform step stamping in B, C areas, wherein the types and the numbers of different depths in d2 and B areas are consistent; d2, stamping the middle-stage stamping dies by adopting a block die, firstly maintaining the pressure of the stamping area reaching the required stamping depth by the middle-stage stamping dies, and stamping the stamping area not reaching the required stamping depth in the pressure maintaining period to achieve consistent stamping depth; The stamping depth of each set of middle-stage stamping die when stamping the stamping area which does not reach the required stamping depth is the same as the depth value with the minimum required stamping depth in the stamped area; S4, final stage stamping, namely transferring the intermediate blank subjected to the previous stage stamping into a final stage stamping die to carry out final stamping forming of a C region, wherein the final stage stamping die adopts a block