Boiler lining plate stamping die and method

Abstract

The invention discloses a boiler lining plate stamping die and method, and relates to the technical field of stamping forming, the boiler lining plate stamping die comprises a stamping unit, a stamping unit and a stamping unit, the stamping unit comprises a male die, a female die matched with the male die, and a discharging plate arranged on the outer side of the male die; a die gap N is formed between the male die and the female die, and the value of the die gap N is not 0; the male die punches downwards to press the plate above the female die, and then punching and blanking of the plate are achieved. The die has the beneficial effects that through cooperation of the male die and the female die, the machining production efficiency is high, the machining cost is low, the material utilization rate is high, the product consistency is good, and operation is easy.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and forming, in particular to a boiler lining stamping die and a boiler lining stamping method. Background Art

[0002] The boiler wind mill lining plate of a thermal power plant is one of the important components inside the boiler, mainly used to protect the inner wall of the boiler and areas related to coal powder wear and erosion.

[0003] Liner plates are usually rectangular in structure and play a key role in the boilers of thermal power plants. In order to ensure the dimensional accuracy and surface quality of the liner plates, most manufacturers use CNC milling machines to process the plate metal during the processing; however, the processing time of CNC milling machines is relatively long, which leads to an extension of the production cycle and restricts the production efficiency of the overall parts. Summary of the invention

[0004] In view of the above-mentioned prior art problems, the present invention is proposed.

[0005] The invention aims to provide a boiler lining plate stamping die, which aims to solve the problem of low efficiency of existing lining plate during processing.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a boiler liner stamping die, comprising a stamping unit, including a punch, a die matching the punch, and a stripper plate arranged outside the punch;

[0007] There is a mold gap N between the male mold and the female mold, and the mold gap N is not 0;

[0008] The punch presses the sheet material onto the die, thereby punching and blanking the sheet material.

[0009] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the surface of the punch is provided with an arc-shaped groove, and the arc-shaped groove is lower than the plane of the punch.

[0010] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the concave die includes a blanking hole opened inside the die, the blanking hole is a tapered hole structure, and the size of the lower opening of the blanking hole is larger than the size of the upper opening;

[0011] The upper opening size of the concave die is matched with that of the convex die.

[0012] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the stripper plate includes a reset member arranged on the end surface;

[0013] The punch and the stripper plate are clearance-matched.

[0014] As a preferred solution of the boiler liner stamping die of the present invention, the die gap N is set to a value of 0.4 mm-0.6 mm.

[0015] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the support unit includes a mounting plate for mounting the male die and a bottom plate for mounting the female die, a positioning pin sleeve arranged on the end surface of the mounting plate, and a positioning pin arranged on the end surface of the bottom plate;

[0016] The positioning pin sleeve is matched with the positioning pin, thereby achieving normal centering of the punch and the die.

[0017] As a preferred solution of the boiler liner stamping die of the present invention, the punch and the die are both made of NM500.

[0018] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the reset member is a rubber rod, and the rubber rod is made of rubber material;

[0019] One end of the rubber rod is connected to the mounting plate, and the other end is connected to the discharge plate.

[0020] As a preferred solution of the boiler liner stamping die of the present invention, wherein: the reset member is a spring;

[0021] One end of the spring is connected to the mounting plate, and the other end is connected to the discharge plate.

[0022] The boiler liner stamping die of the present invention has the following beneficial effects: through the cooperation between the male die and the female die, the processing production efficiency is high, the processing cost is low, the material utilization rate is high, the product consistency is good, and the operation is simple.

[0023] Another object of the present invention is to provide a boiler lining stamping method, which aims to solve the problem that the existing boiler lining processing process consumes a lot of time and has low work efficiency.

[0024] In order to solve the above technical problems, the present invention also provides the following technical solutions: a boiler liner stamping method, comprising: S1: installing a mold on a stamping machine;

[0025] S2: Prepare metal sheets for punching boiler linings;

[0026] S3: Place the metal sheet in the die, start the punching machine, and use the punching die to punch out one boiler lining plate at a time.

[0027] The boiler lining stamping method of the present invention has the following beneficial effects: the stamping process has high production efficiency, is easy to operate, and is easy to realize mechanization and automation; stamping is completed by a die and stamping equipment, and the stroke frequency of an ordinary press is dozens of times per minute, and a stamped part can be obtained with each stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the stamping die structure in the present invention.

[0030] Figure 2 It is a partial cross-sectional view of the stamping die in the present invention.

[0031] Figure 3 It is a schematic diagram of the connection structure between the base plate and the concave mold in the present invention.

[0032] Figure 4 It is a schematic diagram of the connection structure between the mounting plate and the male mold in the present invention.

[0033] Figure 5 It is a schematic diagram of the connection structure between the spring and the stripper plate in the present invention. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Example 1

[0038] Reference Figure 1 and Figure 2, is the first embodiment of the present invention, which provides a boiler lining stamping die, including a stamping unit 100, including a punch 101, a die 102 matched with the punch 101, and a stripper plate 103 arranged on the outside of the punch 101; there is a die gap N between the punch 101 and the die 102, and the value of the die gap N is not 0; the punch 101 punches down to press the sheet material above the die 102, thereby realizing punching and blanking of the sheet material.

[0039] In this embodiment, a clearance fit is adopted between the punch 101 and the die 102, and the arrangement 103 is arranged on the outside of the punch 101. The unloading plate 103 can push the stamped sheet back to the processing position, so that the staff can adjust the position of the sheet and process it again.

[0040] It should be noted that there is a certain gap between the punch 101 and the die 102, so as to ensure that 101 can be embedded into 102 during the stamping process and the stamping of the sheet can be completed; the die gap N is the distance between the punch and die cutting edges. A reasonable gap has a great influence on the quality of the blanking parts, the blanking force and the die life, and is an extremely important value in the design of the blanking die.

[0041] Specifically, during the downward stamping process of the punch 101, the sheet material can be pressed against the die 102, and the punching machine pushes the punch 101 to move inside the die 102, so that the cutting edges of the punch 101 and the die 102 can shear the sheet material, thereby achieving the purpose of processing square parts.

[0042] In summary, through the cooperation between the punch and the die, the processing efficiency is high, the processing cost is low, the material utilization rate is high, the product consistency is good, and the operation is simple.

[0043] Example 2

[0044] Reference Figures 1 to 5 , which is the second embodiment of the present invention, includes an arc-shaped groove 101a on the surface of the punch 101, and the arc-shaped groove 101a is lower than the plane of the punch 101.

[0045] In this embodiment, a force-releasing hole is provided at the center of the surface of the punch 101, and four countersunk holes are designed at the four corners. The punch 101 is mounted on the mounting base of the press with bolts, which is convenient for replacement after damage.

[0046] It should be noted that the bottom plane where the punch 101 and the die 102 cooperate is processed with an annular arc groove 101a at an appropriate distance from the edge; so that it cooperates with the hole set in the middle to unload the force, and the height of the groove is 4mm lower than the bottom plane, reducing the force area of ​​the punch 101 and the die 102 during punching.

[0047] Furthermore, the die 102 includes a blanking hole 102a opened therein, the blanking hole 102a is a tapered hole structure, and the lower opening size of the blanking hole 102a is larger than the upper opening size; the upper opening size of the die 102 is adapted to the punch 101.

[0048] In this embodiment, the upper opening of the blanking hole 102a is a rectangular structure (reference value 104mm*70mm); and the lower opening size of the blanking hole 102a is larger than the upper opening (reference value 150mm*80mm); so that the punched square plate can fall into the receiving tray.

[0049] Furthermore, the stripper plate 103 includes a reset member disposed on the end surface; the punch 101 and the stripper plate 103 are clearance-fitted.

[0050] It should be noted that four threaded holes are symmetrically designed at the four corners of the unloading plate, which are connected to 201 by bolts, and a square hole is processed in the middle to form a clearance fit with the punch 101, so that the punch can pass through the unloading plate smoothly; the convex surface on the unloading plate is designed to fit with the concave surface of the die 102 to avoid excessive force area and increase resistance.

[0051] Furthermore, the mold gap N is set to a value of 0.4 mm to 0.6 mm.

[0052] Specifically, in order to ensure dimensional accuracy, the punch 101 is finely processed by wire cutting, blanking and grinding; a reasonable die gap determines the quality, dimensional accuracy and shape error of the blanked parts.

[0053] When the gap is too large, the bending and stretching of the material increase, the tensile stress increases, the material is easily torn, and cracks are generated on the side slightly away from the cutting edge. The burrs are large and thick and difficult to remove.

[0054] When the gap is too small, the cracks generated at the edges of the punch 101 and the die 102 enter the compressive stress zone below the punch 101 and stop developing. When the punch 101 continues to press down, secondary shearing will occur between the upper and lower cracks, leaving a torn surface in the middle of the cross section of the workpiece and elongated burrs on the cross section.

[0055] Preferably, when the mold gap N is controlled within the range of 0.4mm-0.6mm, the cracks generated by the edges of the punch 101 and the die 102 along the direction of maximum stress will overlap with each other; at this time, although the cross-section between the punches has a certain slope, it is relatively straight, smooth, and has very small burrs.

[0056] Example 3

[0057] Reference Figures 1 to 4, which is the third embodiment of the present invention, includes a support unit 200, including a mounting plate 201 for mounting the punch 101 and a base plate 202 for mounting the die 102, a positioning pin sleeve 203 arranged on the end surface of the mounting plate 201, and a positioning pin 204 arranged on the end surface of the base plate 202; the positioning pin sleeve 203 is adapted to the positioning pin 204, thereby achieving normal alignment of the punch 101 and the die 102.

[0058] In this embodiment, the positioning pin 204 is made of round steel and plays a guiding role in the mold; it can ensure that the punch 101 and the die 102 are properly aligned during the punching process to prevent the mold from being out of place and losing its most basic function and becoming unusable.

[0059] Specifically, the positioning pin 204 is installed on the female die 102 seat, and plays a certain supporting role on the male die 101 seat.

[0060] It should be noted that the positioning pin sleeve 203 ensures the precise fit between the male die 101 and the female die 102, has the function of guiding and positioning, and can withstand a certain lateral pressure. The accuracy of the positioning pin 204 and the positioning pin sleeve 203 largely determines the accuracy of the mold; when manufacturing the positioning pin 204 and the positioning pin sleeve 204, the matching accuracy is controlled within 0.05mm.

[0061] Furthermore, both the male die 101 and the female die 102 are made of NM500.

[0062] It should be noted that NM500 is a highly wear-resistant steel, mainly used in applications that require wear resistance and impact resistance.

[0063] NM500 usually has a hardness level above 500HBW Brinell hardness, which makes it excellent in wear resistance; despite its high hardness, the toughness and strength of NM500 are still relatively high, and it can withstand certain impact loads; NM500 can still maintain good performance in high temperature environment and is suitable for high temperature working conditions.

[0064] Furthermore, the reset member is a rubber rod 103 a , and the rubber rod 103 a is made of rubber material; one end of the rubber rod 103 a is connected to the mounting plate 201 , and the other end is connected to the discharge plate 103 .

[0065] It should be noted that during blanking, the punch 101 punches down and the unloading plate 103 presses the sheet material onto the die 102. The punch 101 pushes the plate downward, and the rubber rod 103a compresses and exposes the punch 101. The cutting edges of the punch 101 and the die 102 are staggered as the punch 101 is pressed down, thereby achieving punching and blanking of the sheet material.

[0066] After punching, the punch 101 rises, and the rubber rod 103a is relaxed to push the unloading plate 103 to remove the waste material stuck outside the punch 101. The punch 101 pushes the workpiece out during the pushing process; each time the punching is done, it is pushed down once, and no waste material accumulates in the mold.

[0067] Example 4

[0068] Reference Figure 5 , which is the fourth embodiment of the present invention, is different from the third embodiment in that it includes a reset member which is a spring 103b; one end of the spring 103b is connected to the mounting plate 201, and the other end is connected to the discharge plate 103.

[0069] It should be noted that 103b is made of SACM645; SACM645 has a high elastic limit and can withstand large stress without permanent deformation; SACM645 has excellent fatigue strength, and the spring made from it can work for a long time under conditions of repeated loading and unloading without breaking; the high wear resistance of SACM645 makes the spring have a long service life in friction and wear environments.

[0070] During blanking, the punch 101 punches down and the unloading plate 103 presses the sheet material onto the die 102. The punch 101 pushes the plate downward, and the spring 103b compresses and exposes the punch 101. The cutting edges of the punch 101 and the die 102 are staggered as the punch 101 is pressed down, thereby achieving punching and blanking of the sheet material.

[0071] After punching, the punch 101 rises, the spring 103b relaxes and pushes the unloading plate 103 to remove the waste material stuck outside the punch 101. The punch 101 pushes the workpiece out during the pushing process; each time the punching is done, it is pushed down once, and no waste material accumulates in the die.

[0072] In summary, the pressure of the press is used as the motive force to make the sheet material deform directly in the mold under the deformation force, so as to obtain rectangular parts; the processing object of this mold is mainly the punching of metal or non-metallic sheets; cold molds are used for stamping during the punching process. The processing characteristics of cold molds are high processing production efficiency, low processing cost, high material utilization rate, good product consistency and simple operation.

[0073] Example 5

[0074] This is the fifth embodiment of the present invention, which further provides a boiler lining stamping method, comprising: S1: installing a mold on a stamping machine.

[0075] Step 1: Pass the bolt through the countersunk hole preset on the surface of the punch 101, and then use a wrench to connect and fix the punch 101 and the mounting plate 201; then fix the die 102 to the base plate 202 in the same way as the punch 101.

[0076] Furthermore, the fixing method of the die 102 may be clamping or welding, so that the die 102 and the bottom plate 202 are relatively fixed.

[0077] S2: Prepare metal sheets for punching boiler linings;

[0078] The metal sheets are processed into suitable sizes by means of blank processing. The materials are cut by CNC cutting, and the verticality error of the six faces and diagonal dimensions is not greater than 0.1 / 300, and the length of the sheets is unified.

[0079] Furthermore, the specifications of the lining plate to be processed are length×width×thickness of 140mm×70mm×10mm; therefore, the thickness of the plate should be matched, and the length and width dimensions should be larger than the required cutting lining plate size.

[0080] S3: Place the metal sheet in the die, start the punching machine, and use the punching die to punch out one boiler lining plate at a time.

[0081] The staff places the sheet material between 101 and 102, and then starts the punching machine, which drives 101 to move downward. During the punching process, the punch 101 first acts on the unloading plate 103 to press the sheet material tightly against the die 102; as the punch 101 presses downward, the reset part is compressed to expose the punch 101; then, the cutting edges of the punch 101 and the die 102 intertwine with each other during the downward pressing of the punch 101, completing the punching and blanking operations on the sheet material.

[0082] After the punching is completed, the punch 101 starts to rise, and the reset part is relaxed, pushing the stripper plate 103 to remove the blanking waste stuck outside the punch 101. During the rising process of the punch 101, it also pushes the workpiece out of the die; after each punching action, the workpiece will be pushed out once to ensure that waste will not accumulate inside the die.

[0083] Then the operator adjusts the punching position of the sheet material, thereby realizing the punching of the sheet material.

[0084] Specifically, stamping processing has high production efficiency, is easy to operate, and is easy to mechanize and automate. However, because stamping relies on dies and stamping equipment to complete the processing, the stroke frequency of ordinary presses is dozens of times per minute, and high-speed presses can reach hundreds of times per minute, and each stroke can produce a stamped part.

[0085] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A boiler liner stamping die, characterized in that: include, A punching unit (100) comprises a punch (101), a die (102) adapted to the punch (101), and a stripper plate (103) arranged outside the punch (101); There is a mold gap N between the male mold (101) and the female mold (102), and the mold gap N is not 0; The convex die (101) punches downward to press the sheet material onto the concave die (102), thereby achieving punching and blanking of the sheet material.

2. The boiler liner stamping die according to claim 1, characterized in that: The surface of the male mold (101) is provided with an arc-shaped groove (101a), and the arc-shaped groove (101a) is lower than the plane of the male mold (101).

3. The boiler liner stamping die according to claim 1 or 2, characterized in that: The concave die (102) comprises a blanking hole (102a) opened therein, the blanking hole (102a) is a tapered hole structure, and the size of the lower opening of the blanking hole (102a) is larger than the size of the upper opening; The upper opening size of the concave die (102) is adapted to that of the convex die (101).

4. The boiler liner stamping die according to claim 3, characterized in that: The stripping plate (103) comprises a reset member arranged on the end surface; The punch (101) and the stripping plate (103) are clearance-matched.

5. The boiler liner stamping die according to any one of claims 1, 2 or 4, characterized in that: The mold gap N has a value of 0.4mm-0.6mm.

6. The boiler liner stamping die according to claim 4, characterized in that: Also includes, A support unit (200) comprising a mounting plate (201) for mounting the male die (101) and a bottom plate (202) for mounting the female die (102), a positioning pin sleeve (203) arranged on the end surface of the mounting plate (201), and a positioning pin (204) arranged on the end surface of the bottom plate (202); The positioning pin sleeve (203) is matched with the positioning pin (204), thereby achieving normal centering of the male die (101) and the female die (102).

7. The boiler liner stamping die according to any one of claims 1, 2, 4 or 6, characterized in that: The male mold (101) and the female mold (102) are both made of NM500.

8. The boiler liner stamping die according to claim 6, characterized in that: The reset member is a rubber rod (103a), and the rubber rod (103a) is made of rubber material; One end of the rubber rod (103a) is connected to the mounting plate (201), and the other end is connected to the discharge plate (103).

9. The boiler liner stamping die according to claim 6, characterized in that: The reset element is a spring (103b); One end of the spring (103b) is connected to the mounting plate (201), and the other end is connected to the discharge plate (103).

10. A boiler lining stamping method, characterized in that: include, S1: Install the die on the punching machine; S2: Prepare metal sheets for punching boiler linings; S3: Place the metal sheet in the die, start the punching machine, and use the punching die to punch out one boiler lining plate at a time.

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