Step-by-step forming device for fan volute front disc

Abstract

A step-by-step forming device for a front disc of a fan volute comprises a deep drawing device, a trimming and punching device, a flanging and hole flanging device and an automatic mechanical arm which plays a workpiece transferring role among the deep drawing device, the trimming and punching device and the flanging and hole flanging device. The trimming and punching equipment is used for trimming and punching on the plate subjected to preliminary deep drawing, and the flanging and hole flanging equipment is used for flanging and hole flanging on the plate subjected to trimming and punching to obtain the fan volute front disc with the required shape; the device comprises three independent devices, each device completes one working procedure of a workpiece, so that hole flanging of the workpiece is located in a safe area, and the product percent of pass is high; in the first working procedure treatment, the workpiece is treated in the tensile stress state, so that the large arc surface of the workpiece can be well formed, and the stability is high; and in the last process, flanging and hole flanging are completed in the same process, so that the concentricity of hole flanging and flanging of the product can be well ensured.

Description

Technical Field

[0001] The utility model relates to a step-by-step forming device for a front disk of a fan volute. Background Art

[0002] Figure 1 This is a schematic diagram of the parts of the front disk of the fan volute involved. The workpiece is 2mm thick and made of 5052-0 magnesium-aluminum alloy. It is made from a flat plate through two processes: trimming, punching, and flanging. The theoretical expansion of the part is 220.7 and the flanging coefficient is 0.688. Since it is lower than the minimum flanging coefficient of the material of 0.7, it is prone to breakage during one flanging process, resulting in a high defective rate of the product and a high manufacturing cost. Summary of the invention

[0003] In view of the shortcomings existing in the above problems, the utility model provides a step-by-step forming device for a front disc of a fan volute.

[0004] To achieve the above-mentioned purpose, the utility model provides a step-by-step forming device for a front disc of a fan volute, comprising a drawing device, a trimming and punching device, a flanging and hole-turning device and an automatic manipulator that plays a role in transferring workpieces between the above three devices. The drawing device is used for the preliminary drawing of a plate, the trimming and punching device is used for trimming and punching the plate after the preliminary drawing, and the flanging and hole-turning device is used for flanging and hole-turning the plate after trimming and punching to obtain a fan volute front disc of a desired shape.

[0005] Furthermore, the drawing equipment is a drawing die, which is used on a 500T hydraulic press. The drawing equipment includes an upper die base a driven by a hydraulic press, a drawing die a fixedly connected to the lower part of the upper die base a, a lower die base a arranged below the upper die base a, and a drawing lower die a fixed on the lower die base a. The middle part of the drawing lower die a is a movable drawing punch a, and the drawing punch a is driven by a lower top cylinder to move in the vertical direction.

[0006] Furthermore, the drawing punch a is provided with a plurality of exhaust holes to prevent vacuum from forming on the plate during the drawing process.

[0007] Furthermore, the trimming and punching equipment is a punching die, and the trimming and punching equipment includes an upper die base b, a lower die base b, a punching punch b, a punching die b, a trimming punch b, and a trimming die b. The trimming punch b is fixed to the lower die base b through a lower pad b, and the trimming die b is arranged around the outside of the trimming punch b. A pressure plate 2 b is connected to the trimming die b, and the pressure plate 2 b is connected to the upper die base b through an upper pad b, a first rectangular spring b, and an equal height sleeve b. A positioning plate b is fixed on the trimming punch b, and the punching die b is interference fit in the middle hole of the positioning plate b. The punching punch b is fixed below the upper die base b and corresponds to the punching die b. A pressure plate 1 b is arranged on the periphery of the punching punch b, and the pressure plate 1 b is connected to the upper die base b through a second rectangular spring b.

[0008] Furthermore, the trimming and punching equipment also includes a lower stripping plate b and a lower die spring b for ejecting trimming waste.

[0009] Furthermore, the flanging and hole-turning equipment includes an upper die base c, a lower die base c, a hole-turning punch c, and a hole-turning and drawing convex-concave die c. The hole-turning and drawing convex-concave die c is connected to the upper die base c through an upper pad c. A pressure plate c is provided on the outer side of the hole-turning and drawing convex-concave die c. The pressure plate c is connected to the upper die base c through a first rectangular spring c and a first equal-height sleeve c. A lower template c is fixed on the lower die base c. A lower stripping plate c is provided in the lower template c. The lower stripping plate c is connected to the lower die base c through a second rectangular spring c and a second equal-height sleeve c. The hole-turning punch c is located below the hole-turning and drawing convex-concave die c. The hole-turning punch c is driven by a lower top cylinder to move in a vertical direction to interact with the hole-turning and drawing convex-concave die c to achieve the final forming of the workpiece.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the device comprises three independent devices, each of which completes a process of the workpiece, so that the workpiece hole turning is in a safe area and the product qualification rate is high; in the first process, the workpiece is processed in a tensile stress state, so the large arc surface of the workpiece can be well formed and has strong stability; in the last process, flanging and hole turning are completed in the same process, so the concentricity of the product hole turning and flanging can be well guaranteed, the radial runout of the product can also be controlled, and the hole turning and flanging are completed on the same device, thereby improving labor productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the parts of the front disc of the fan volute involved (after molding);

[0012] Figure 2 Schematic diagram of three molding processes of the front disk of the fan volute involved;

[0013] Figure 3 is a schematic diagram of the deep drawing equipment involved;

[0014] Figure 4 A schematic diagram of the trimming and punching equipment involved;

[0015] Figure 5 It is a schematic diagram of the flanging and hole-turning equipment involved.

[0016] In the figure:

[0017] 1. Upper die seat a; 2. Drawing die a; 3. Drawing punch a; 4. Drawing lower die a; 5. Lower die seat a;

[0018] 11. Upper die base b; 12. Upper pad b; 13. Punching die b; 14. Positioning plate b; 15. Pressing plate b; 16. Trimming die b; 17. Trimming punch b; 18. Lower stripping plate b; 19. Lower pad b; 20. Lower die base b; 21. Pressing plate b; 22. Punching punch b; 23. Equal height sleeve b; 24. First rectangular spring b; 25. Second rectangular spring b; 26. Lower die spring b;

[0019] 101. Upper die seat c; 102. Upper pad c; 103. Positioning block c; 104. Hole-turning and drawing convex and concave dies c; 105. First equal height sleeve c; 106. Pressing plate c; 107. Lower stripping plate c; 108. Lower template c; 109. Second equal height sleeve c; 110. Lower die seat c; 111. Hole-turning convex die c; 112. First rectangular spring c; 113. Second rectangular spring c. DETAILED DESCRIPTION

[0020] like Figures 1 to 5 As shown, a step-by-step forming device for a fan volute front disc of an embodiment of the utility model comprises a drawing device, a trimming and punching device, a flanging and hole-turning device, and an automatic manipulator that plays a role in transferring workpieces between the three devices. The drawing device is used for preliminary drawing of a plate, the trimming and punching device is used for trimming and punching the plate after preliminary drawing, and the flanging and hole-turning device is used for flanging and hole-turning the plate after trimming and punching to obtain a fan volute front disc of a desired shape;

[0021] like Figure 3As shown, the drawing equipment is a drawing die, which is used on a 500T hydraulic press. The drawing equipment includes an upper die seat a1 driven by a hydraulic press, a drawing concave die a2 fixedly connected to the lower part of the upper die seat a1, a lower die seat a5 arranged below the upper die seat a1, and a drawing lower die a4 fixed on the lower die seat a5. The middle of the drawing lower die a4 is a movable drawing punch a3, which is driven by a lower top cylinder to move in the vertical direction. A plurality of exhaust holes are provided on the drawing punch a3, and two of the exhaust holes have a diameter of 8mm. An exhaust groove with a diameter of 10mm is also provided at the bottom of the drawing punch a3 to prevent the plate from forming a vacuum during the drawing process.

[0022] like Figure 4 As shown, the trimming and punching equipment is a punching die, and the trimming and punching equipment includes an upper die base b11, a lower die base b20, a punching punch b22, a punching die b13, a trimming punch b17, and a trimming die b16. The trimming punch b17 is fixed on the lower die base b20 through a lower pad b19, and the trimming die b16 is surrounded by the outer side of the trimming punch b17. A second pressing plate b15 is connected inside the trimming die b16. The second pressing plate b15 is connected to the upper pad b12, the first rectangular spring b24, and the equal height sleeve b23. The upper die base b11 is connected, a positioning plate b14 is fixed on the trimming punch b17, a punching die b13 is interference-fitted in the middle hole of the positioning plate b14, a punching punch b22 is fixed below the upper die base b11 and corresponds to the punching die b13, a pressing plate b21 is arranged on the periphery of the punching punch b22, and the pressing plate b21 is connected to the upper die base b11 via a second rectangular spring b25, and the trimming punching device also includes a lower stripping plate b18 and a lower die spring b26 for ejecting trimming waste;

[0023] like Figure 5 As shown, the flanging and hole-turning equipment comprises an upper die base c101, a lower die base c110, a hole-turning punch c111, and a hole-turning and drawing convex-concave die c104. The hole-turning and drawing convex-concave die c104 is connected to the upper die base c101 through an upper pad c102. A pressing plate c106 is provided on the outer side of the hole-turning and drawing convex-concave die c104. The pressing plate c106 is connected to the upper die base c101 through a first rectangular spring c112 and a first equal height sleeve c105. A lower template c108 is fixed on c110, and a lower stripping plate c107 is arranged inside the lower template c108. The lower stripping plate c107 is connected to the lower die base c110 through a second rectangular spring c113 and a second equal height sleeve c109. The hole-turning punch c111 is located below the hole-turning and drawing convex-concave die c104. The hole-turning punch c111 is driven by a lower push cylinder to move in the vertical direction to interact with the hole-turning and drawing convex-concave die c104 to realize the final forming of the workpiece.

[0024] The device includes three independent devices, each of which completes a process of the workpiece, so that the workpiece hole turning is in a safe area and the product qualification rate is high; in the first process, the workpiece is processed in a tensile stress state, so the large arc surface of the workpiece can be well formed and has strong stability; in the last process, the flanging and hole turning are completed in the same process, which can well ensure the concentricity of the product hole turning and flanging, and the radial runout of the product can also be controlled, and the hole turning and flanging are completed on the same equipment, which improves labor productivity.

[0025] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0026] Drawing process: This die is used on a 500T hydraulic press. When making parts, the sheet is placed on the drawing lower die a, the hydraulic press moves downward to press the sheet, and then the drawing punch a fixed on the lower top cylinder moves upward until the drawing is completed; when the die is working, the upper cylinder of the hydraulic press provides a sufficiently large blanking force, and the material is in a tensile stress state during drawing, which allows for full drawing, stable dimensions after drawing, and small springback.

[0027] Punching process: The punching force of this process is about 192T, and the mold is placed on a 315T punch press. The first deep-drawn part is placed on the positioning plate b, the mold moves downward, and the pressure plate 1b and the pressure plate 2b simultaneously press the upper surface and the forming surface of the part. The mold continues to move downward, punching the large hole in the middle and cutting the large circle of the outer ring. After the punching is completed, the mold moves upward, and the lower stripping plate b pushes out the waste under the force of the lower die spring b. The mold is guided by a ball guide column to ensure accuracy.

[0028] Flanging and hole-turning process: The mold is made on a 500T hydraulic press. The trimmed parts are placed on the lower template c, positioned, and the hydraulic press moves downward. The pressing plate c first contacts the sheet, and the first rectangular spring c provides the blanking force. The mold moves downward, and the hole-turning and drawing convex and concave dies c and the lower stripping plate c press the parts to continue to move downward. The outer circle is drawn by the hole-turning and drawing convex and concave dies c and the lower template c. At this time, the main cylinder of the hydraulic press stops moving downward, but the pressure is maintained. The lower top cylinder moves upward, and the hole-turning convex c moves upward synchronously. The hole-turning convex c and the hole-turning and drawing convex and concave dies c complete the hole-turning process.

[0029] The material of this part is AL-Mg alloy, and the surface is required to be free of obvious scratches. However, the part has a high hole. In order to reduce the scratches on the part, the surface of the part is coated immediately after unloading. The surface of the first drawing die is polished. The surface of the third drawing die is polished and TD treated. Semi-volatile water-soluble drawing oil is used in the production of this part.

[0030] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A step-by-step forming device for a front disc of a fan volute, characterized in that: It includes a drawing device, a trimming and punching device, a flanging and hole-turning device, and an automatic manipulator that plays a role in transferring workpieces between the above three devices. The drawing device is used for the preliminary drawing of the plate, the trimming and punching device is used for trimming and punching the plate after the preliminary drawing, and the flanging and hole-turning device is used for flanging and hole-turning the plate after trimming and punching to obtain a fan volute front disc of the required shape.

2. The step-by-step forming device for the front disc of a fan volute according to claim 1 is characterized in that: The drawing equipment is a drawing die, which is used on a 500T hydraulic press. The drawing equipment comprises an upper die base a (1) driven by the hydraulic press, a drawing die a (2) fixedly connected to the lower part of the upper die base a (1), a lower die base a (5) arranged below the upper die base a (1), and a drawing lower die a (4) fixed on the lower die base a (5). The middle part of the drawing lower die a (4) is a movable drawing punch a (3), and the drawing punch a (3) is driven by a lower push cylinder to move in the vertical direction.

3. The step-by-step forming device for the front disc of the fan volute according to claim 2 is characterized in that: The drawing punch a (3) is provided with a plurality of exhaust holes to prevent the plate from forming a vacuum during the drawing process.

4. The step-by-step forming device for the front disc of a fan volute according to claim 1 is characterized in that: The trimming and punching device is a punching die, comprising an upper die base b (11), a lower die base b (20), a punching punch b (22), a punching die b (13), a trimming punch b (17), and a trimming die b (16). The trimming punch b (17) is fixed to the lower die base b (20) via a lower pad b (19). The trimming die b (16) is arranged around the outer side of the trimming punch b (17). A second pressing plate b (15) is connected to the trimming die b (16). The second pressing plate b (15) is connected to the upper pad b (12), the first matrix A rectangular spring b (24) and an equal height sleeve b (23) are connected to the upper die base b (11); a positioning plate b (14) is fixed on the trimming punch b (17); the punching die b (13) is interference-mounted in the middle hole of the positioning plate b (14); the punching punch b (22) is fixed below the upper die base b (11) and corresponds to the punching die b (13); a pressure plate b (21) is provided on the periphery of the punching punch b (22); the pressure plate b (21) is connected to the upper die base b (11) via a second rectangular spring b (25).

5. The step-by-step forming device for the front disc of the fan volute according to claim 4 is characterized in that: The trimming and punching equipment also includes a lower stripping plate b (18) and a lower die spring b (26) for ejecting trimming waste.

6. The step-by-step forming device for the front disc of a fan volute according to claim 1 is characterized in that: The flanging and hole-turning device comprises an upper die base c (101), a lower die base c (110), a hole-turning punch c (111), and a hole-turning drawing convex-concave die c (104); the hole-turning drawing convex-concave die c (104) is connected to the upper die base c (101) via an upper pad c (102); a pressure plate c (106) is provided on the outer side of the hole-turning drawing convex-concave die c (104); the pressure plate c (106) is connected to the upper die base c (101) via a first rectangular spring c (112) and a first equal-height sleeve c (105); the lower die base c A lower template c (108) is fixed on (110), and a lower stripping plate c (107) is arranged inside the lower template c (108). The lower stripping plate c (107) is connected to the lower die base c (110) through a second rectangular spring c (113) and a second equal height sleeve c (109). The hole punch c (111) is located below the hole punching and drawing convex-concave die c (104). The hole punch c (111) is driven by a lower push cylinder to move in the vertical direction to interact with the hole punching and drawing convex-concave die c (104) to achieve the final forming of the workpiece.

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