A hot pressing correction method for deformed workpieces
By setting the calibration structure in the heating furnace and controlling the calibration parameters, the problem of difficulty in pressure control during the high-strength workpiece calibration process is solved, and efficient and safe calibration effect is achieved, and the use rate and calibration accuracy of the workpiece are improved.
Patent Information
- Application Number
- CN202111144347.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-09-28
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2041-09-28
AI Technical Summary
During the calibration process of deformed workpieces with high strength, the prior art is difficult to effectively control the correction pressure, resulting in increased deformation or cracking risks, and the correction operability is poor, which cannot meet the needs of special workpieces.
A complete set of correction structure is arranged in the heating furnace, and pressure is applied through the maximum deformation position, and the first support seat and anti-slip part are used to prevent the correction of heavy objects from pouring. The force angle and contact area are adjusted in combination with the limiting member and the removable support block, and the calibration is controlled. Temperature to improve material plasticity and efficiency.
It effectively reduces the difficulty of calibration of workpieces with high strength, improves calibration effect and utilization rate, ensures calibration accuracy and safety, and avoids damage and scrapping of workpieces.
Smart Images
Figure CN113828657B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a correction method, in particular to a hot pressing correction method for a deformed workpiece. Background Art
[0002] In manufacturing enterprises, due to the influence of various factors such as design and production process, the workpiece may not meet the technical requirements due to excessive deformation (deformation exceeds the allowable range). In this regard, measures must be taken to correct the size of the deformed workpiece to within the allowable range. This size correction process is called calibration.
[0003] For deformed workpieces with higher strength, due to their greater deformation resistance, it is difficult to control the force applied by the pressure equipment when applying correction pressure. If you are not careful, the deformation of the workpiece may increase or even increase the risk of cracking, ultimately causing the workpiece to be scrapped. Therefore, some deformed workpieces with higher strength, special material properties or special shapes need to be corrected while heating, but the existing correction methods are difficult to meet the needs of such workpieces, making the correction operability of such workpieces poor. Summary of the invention
[0004] The purpose of the present invention is to provide a hot pressing correction method for a deformed workpiece with good correction effect in order to solve the problem of poor operability of deformation correction of a workpiece with relatively high strength in the prior art.
[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:
[0006] A method for hot pressing correction of a deformed workpiece comprises the following steps:
[0007] S1: Find the maximum deformation position of the deformed part, place the deformed part on the bottom plate of the heating furnace, and make the maximum deformation position arch away from the bottom plate;
[0008] S2: placing a first support seat on the bottom plate, so that the first support seat is located on one side of the deformable member, and the top surface of the first support seat is higher than the highest point of the maximum deformation of the deformable member;
[0009] S3: Pressing one end of the calibration weight onto the deformable member through the maximum deformation position, and placing the other end of the calibration weight onto the first support seat;
[0010] S4: Turn on the heating furnace for calibration.
[0011] The present invention adopts the above technical scheme, by placing the whole set of correction structure in a heating furnace, heating correction is performed, and the correction effect is good, especially for deformed parts with higher strength, their correction difficulty is reduced, and the utilization rate of deformed workpieces is improved; a correction weight is pressed on the maximum deformation position of the deformed part, and pressure is directly applied to the deformation position, and the correction effect is good; a first support seat is provided to prevent the correction weight from tipping over, and because the top of the first support seat is higher than the highest point of the maximum deformation of the deformed part, the deformed part is subjected to a greater force, which is beneficial to improving the correction efficiency.
[0012] Furthermore, step S1 also includes setting a second support seat on the bottom plate, and placing both ends of the deformable member on the bottom plate through the second support seat. The deformable member is raised so that the maximum deformation part of the deformable member is suspended on the bottom plate, reducing the contact area between the deformable member and the bottom plate, and avoiding damage to the structure of the rest of the deformable member.
[0013] Furthermore, the second support seat is V-shaped. When the deformable member is a long axis, the second support seat is preferably V-shaped, and the V-shape plays a role in fixing the long axis structure to prevent the deformable member from rolling.
[0014] Furthermore, step S1 also includes setting a limiter below the maximum deformation position of the deformable part, the maximum deformation of the deformable part is A, the processing allowance of the deformable part is B, and the maximum distance between the limiter and the inner wall of the dome of the deformable part is A to (A+2 / 3B). The limiter limits the correction limit of the correction weight to prevent over-correction; the maximum distance can be A to (A+2 / 3B), which reserves a margin for the reverse deformation of the deformable part after it comes out of the furnace.
[0015] Furthermore, in S2, an anti-slip member is provided on the bottom plate, the first support seat and the anti-slip member are respectively located on both sides of the deformable member, and the calibration weight is suspended above the anti-slip member. The anti-slip member provides support when the calibration weight slides, preventing the calibration weight from damaging the heating furnace, thereby protecting the heating furnace.
[0016] Furthermore, the calibration weight, the first support seat and the anti-slip member are all made of ferrous metal. Ferrous metal has a high melting point and can maintain stable performance at the calibration temperature; in specific use, the anti-slip member can be a heat-resistant brick.
[0017] Furthermore, in S3, a detachable thin sheet support block is provided above the first support seat, and the top surface of the support block has an inclination angle of 0° to 10° in the horizontal direction, and the correction weight is pressed on the support block. The support block is detachable and replaceable, which is convenient for adjusting the inclination angle of the correction weight, that is, convenient for adjusting the force magnitude of the deformable part and the stability of the correction point. The greater the force, the faster the correction, which is convenient for adjusting the time required for the correction of the deformable part.
[0018] Furthermore, in S4, the setting of the heating furnace temperature is also included, and the corresponding correction temperature is determined according to the process in which the deformed part is located: when the deformed part is deformed before the final heat treatment, the heating temperature of the heating furnace can be higher than the austenitizing temperature of the deformed part; when the deformed part is deformed after the final heat treatment, the heating temperature of the heating furnace is at least 10°C lower than the final heat treatment temperature. If the deformed part is deformed before the final heat treatment, its heating temperature can be a higher temperature range than the austenitizing temperature of the deformed part (refer to the normalizing or quenching temperature range). Increasing the correction temperature is conducive to improving the plasticity of the material and reducing the difficulty and time of correction; if the deformed part is deformed after the final heat treatment, the hardness and strength of the workpiece need to be considered, so the correction temperature has an upper limit.
[0019] Furthermore, the correction weight only contacts the maximum deformation area of the deformable member, thereby reducing the contact area between the deformable member and the correction weight, increasing the pressure on the deformable member, and improving the correction speed.
[0020] Furthermore, the correction weight can be formed by stacking multiple workpieces, and the center of gravity of the correction weight is biased towards the deformable part. The correction weight can be a single workpiece or a whole formed by stacking multiple workpieces; when the workpieces are stacked, the contact area between the bottom correction weight and the deformable part should be small, and the cross-section of the upper workpiece should be as large as possible to improve the stability of the workpiece stacking.
[0021] Compared with the prior art, the present invention has the following beneficial effects: by placing the entire correction structure in a heating furnace for heating correction, the correction effect is good, especially for deformed parts with higher strength, their correction difficulty is reduced, and the utilization rate of deformed workpieces is improved; a correction weight is pressed on the position of the maximum deformation of the deformed part, and pressure is directly applied to the deformation position, so the correction effect is good; a first support seat is provided to prevent the correction weight from tipping over, and since the top of the first support seat is higher than the highest point of the maximum deformation of the deformed part, the deformed part is subjected to a greater force, which is beneficial to improving the correction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings constituting a part of the present application are used to provide a further understanding of the invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0023] Figure 1 A three-dimensional structural diagram of the deformed workpiece hot pressing correction method of the present invention is shown.
[0024] Figure 2 A side view showing the hot pressing correction method for a deformed workpiece according to the present invention.
[0025] The above drawings include the following reference numerals:
[0026] 1. Deformation member; 2. Bottom plate; 3. First support seat; 4. Calibration weight; 5. Second support seat; 6. Limiting member; 7. Anti-slip member; 8. Support block. DETAILED DESCRIPTION
[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.
[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0029] like Figure 1 and Figure 2 , a method for hot pressing correction of a deformed workpiece, comprising the following steps,
[0030] S1: Find the maximum deformation position of the deformable member 1, place the deformable member 1 on the bottom plate 2 of the heating furnace, and make the maximum deformation position arch away from the bottom plate 2;
[0031] S2: placing a first support seat 3 on the bottom plate 2, so that the first support seat 3 is located on one side of the deformable member 1, and the top surface thereof is higher than the highest point of the maximum deformation of the deformable member 1;
[0032] S3: Press one end of the calibration weight 4 onto the deformable member 1 through the maximum deformation position, and place the other end of the calibration weight 4 onto the first support seat 3;
[0033] S4: Turn on the heating furnace for calibration.
[0034] Preferably, step S1 further includes providing a second support seat 5 on the bottom plate 2 , and two ends of the deformable member 1 are placed on the bottom plate 2 through the second support seat 5 .
[0035] Preferably, the second support seat 5 is V-shaped.
[0036] Preferably, step S1 also includes setting a limit member 6 below the maximum deformation position of the deformable member 1, the maximum deformation of the deformable member 1 is A, the processing allowance of the deformable member 1 is B, and the maximum distance between the limit member 6 and the inner wall of the arch of the deformable member 1 is A~(A+2 / 3B).
[0037] Preferably, in S2 , an anti-slip member 7 is further provided on the bottom plate 2 , the first support seat 3 and the anti-slip member 7 are respectively located on both sides of the deformable member 1 , and the correction weight 4 is suspended above the anti-slip member 7 .
[0038] Preferably, the calibration weight 4, the first support seat 3 and the anti-slip member 7 are all made of ferrous metal.
[0039] Preferably, in S3 , a detachable thin sheet-shaped support block 8 is provided above the first support seat 3 , the top surface of the support block 8 has an inclination angle of 0° to 10° in the horizontal direction, and the correction weight 4 is pressed on the support block 8 .
[0040] Preferably, S4 also includes the setting of the heating furnace temperature, and the corresponding correction temperature is determined according to the process in which the deformed part 1 is located: when the deformed part 1 is deformed before the final heat treatment, the heating temperature of the heating furnace may be higher than the austenitizing temperature of the deformed part 1; when the deformed part 1 is deformed after the final heat treatment, the heating temperature of the heating furnace is at least 10°C lower than the final heat treatment temperature.
[0041] Preferably, the correction weight 4 only abuts against the maximum deformation area of the deformation element 1.
[0042] Preferably, the calibration weight 4 can be formed by stacking a plurality of workpieces, and the center of gravity of the calibration weight 4 is biased toward the deformable member 1 .
[0043] Specifically, the holding time of the deformed part in the heating furnace is related to the deformation amount of the deformed part, material properties, strength, and heating temperature in the furnace. The greater the deformation amount, the longer the holding time; the better the high temperature resistance of the material, the longer the holding time; the better the deformation resistance of the material, the longer the holding time; and the higher the heating temperature, the shorter the holding time.
[0044] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A method for hot pressing correction of a deformed workpiece, characterized in that: The following steps are included: S1: finding the maximum deformation position of the deformable member (1), placing the deformable member (1) on the bottom plate (2) of the heating furnace, and making the maximum deformation position arch in a direction away from the bottom plate (2); S2: placing a first support seat (3) on the bottom plate (2) such that the first support seat (3) is located on one side of the deformable member (1) and the top surface thereof is higher than the highest point of the maximum deformation of the deformable member (1); S3: pressing one end of the calibration weight (4) onto the deformable member (1) through the maximum deformation position, and placing the other end of the calibration weight (4) onto the first support seat (3); S4: Turn on the heating furnace for calibration; In S3, a detachable thin sheet-shaped support block (8) is provided above the first support seat (3), the top surface of the support block (8) has an inclination angle of [0°~10°] in the horizontal direction, and the calibration weight (4) is pressed on the support block (8).
2. The hot pressing correction method for a deformed workpiece according to claim 1, characterized in that: Step S1 also includes arranging a second support seat (5) on the bottom plate (2), and placing two ends of the deformable member (1) on the bottom plate (2) via the second support seat (5).
3. The hot pressing correction method for deformed workpiece according to claim 2, characterized in that: The second support seat (5) is V-shaped.
4. The hot pressing correction method for a deformed workpiece according to claim 2, characterized in that: Step S1 also includes providing a limit member (6) below the maximum deformation position of the deformable member (1), the maximum deformation amount of the deformable member (1) is A, the machining allowance of the deformable member (1) is B, and the maximum distance between the limit member (6) and the inner wall of the dome of the deformable member (1) is A~(A+2 / 3B).
5. The hot pressing correction method for a deformed workpiece according to claim 1, characterized in that: In S2, an anti-slip member (7) is further included on the bottom plate (2), the first support seat (3) and the anti-slip member (7) are respectively located on both sides of the deformable member (1), and the correction weight (4) is suspended above the anti-slip member (7).
6. The hot pressing correction method for a deformed workpiece according to claim 5, characterized in that: The calibration weight (4), the first support seat (3) and the anti-slip member (7) are all made of ferrous metal.
7. The hot pressing correction method for a deformed workpiece according to claim 1, characterized in that: In S4, the temperature of the heating furnace is also set, and the corresponding correction temperature is determined according to the process in which the deformed part (1) is located: when the deformed part (1) is deformed before the final heat treatment, the heating temperature of the heating furnace may be higher than the austenitizing temperature of the deformed part (1); When the deformed part (1) is deformed after the final heat treatment, the heating temperature of the heating furnace is at least 10° C. lower than the final heat treatment temperature.
8. The hot pressing correction method for a deformed workpiece according to claim 1, characterized in that: The correction weight (4) only abuts against the maximum deformation area of the deformable member (1).
9. The hot pressing correction method for a deformed workpiece according to claim 8, characterized in that: The calibration weight (4) can be formed by stacking a plurality of workpieces, and the center of gravity of the calibration weight (4) is biased toward the deformable member (1).