Special tool for preventing heat treatment warping of long and thin-walled forgings with radians

Abstract

The utility model relates to the field of forge piece buckling deformation prevention, in particular to a special tool for preventing heat treatment warping of long and thin-walled forge pieces with radians. The special tool comprises a loading carrier part, an anti-warping pressing part, a plurality of radian deformation preventing parts and pressing strips. The loading carrier part comprises a clamping table, a stand column and a loading carrier.

Description

Technical Field

[0001] The utility model relates to the field of forging anti-warping and deformation, in particular to a special tooling for preventing heat treatment warping of long thin-walled forgings with arcs. Background Art

[0002] It is very common for forgings to warp during the heat treatment process, and it is also a bottleneck problem in our heat treatment. Long thin-walled forgings with curvature will inevitably produce large stress during the forging process due to their thin wall thickness, long length, and curvature. The stress release during the subsequent heat treatment heating and cooling process causes the forgings to warp substandardly, and some titanium alloy forgings will be subjected to a correction process after being heated, which will lead to a decrease in the strength of the forgings and even cause the physical and chemical properties of the forgings to fail to meet the standards. Moreover, it is very difficult to correct long thin-walled forgings with curvature after heating, and it will further increase the internal stress of the forgings, seriously affecting the first-time inspection pass rate and delivery cycle of the forgings. Utility Model Content

[0003] The utility model aims to design a special charging tool for heat treatment of long thin-walled forgings with arcs to prevent the forgings from warping and deformation during heat treatment.

[0004] Technical solution:

[0005] The utility model discloses a special tool for preventing heat treatment warping of long thin-walled forgings with curvature, comprising: a charging carrier part, an anti-warping pressing part, a plurality of anti-curvature deformation parts, and a pressure strip;

[0006] The loading carrier part includes a card table, a column and a loading carrier;

[0007] A row of columns are arranged at both ends of the charging carrier, and the top ends of the columns extend toward the charging carrier. A long thin-walled forging with an arc is placed on the charging carrier;

[0008] The anti-arc deformation part is a toothed strip, which is used to locate the arc section of the long thin-walled forging; the adjacent teeth of each toothed strip form a slot to clamp the long thin-walled forging from the top and one side, and the slots at the same position on two adjacent toothed strips clamp the long thin-walled forging from the left and right directions respectively;

[0009] The anti-warping pressing part is a perforated pressure strip, which is used to locate the non-arc section of the long thin-walled forging;

[0010] The pressure strip is pressed against the card table and the column downward to tighten the two ends of the anti-warping pressing part and the two ends of the pressure strip with teeth.

[0011] The charging carrier part is formed by integral casting.

[0012] The tooth spacing of the anti-arc deformation part = forging width + 30~100mm.

[0013] The tooth height of the anti-arc deformation part = forging thickness - preset thickness, and the preset thickness ranges from 10 mm to 1 / 2 forging thickness.

[0014] When the toothed pressure strip is positioned left or right, it needs to move along the width of the charging carrier until it abuts against the long thin-walled forging from the left or right side;

[0015] The cross beam of the anti-curvature deformation part is 50 to 100 mm shorter than the cross beam of the anti-warping compression part.

[0016] At least one set of three toothed strips is used on one curved surface of a long thin-walled forging.

[0017] The beneficial effect is that in the past, when the arc-shaped long thin-walled forgings were heat treated without taking measures to control the warping of the arc part, the arc warping of the forgings after heat treatment was large (the arc size of the forgings changed greatly), and each time it needed to go through a correction process, and the correction of the warping in the arc direction was very difficult, and it was also very challenging to the correction technology, and it needed to be corrected repeatedly. It was often not corrected well, and the forgings were twisted into a twist shape, which led to low work efficiency and huge costs. Repeated corrections also had an adverse effect on the performance of the forgings. By designing and using the tooling, when the forgings are loaded into the furnace before heat treatment, according to the characteristics of the forgings being thin, long and with arcs, the lever and the three-point fixing principle are cleverly used to fix the forgings in sections in the length direction, so that they do not warp in the vertical direction, and the teeth of the toothed crossbeam are used to fix the arc part of the end frame at three points, so that the arc size does not change during the heating and cooling process. The use of the tooling can greatly reduce the warping caused by the stress release of the forgings during the heating and cooling process of the heat treatment, and effectively solve the deformation problem of such forgings. The tooling is cleverly designed, simple to use, convenient to hoist, easy to operate, and can realize multi-layer loading, effectively utilize the furnace space, improve efficiency, and save costs. In addition, the tooling is low in manufacturing cost and easy to realize. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional view of the special tooling used for heat treatment of forgings;

[0019] Figure 2 It is a schematic diagram of the structure of the charging carrier part;

[0020] Figure 3 It is a structural schematic diagram of the anti-warping pressing part;

[0021] Figure 4 It is a structural schematic diagram of the anti-curvature deformation part;

[0022] Figure 5 It is a schematic diagram of the structure of the layering strip.

[0023] Figure 6 It is a schematic diagram of the structure of the special tooling for installing forgings. DETAILED DESCRIPTION

[0024] The utility model provides a special tooling and a method for using it for preventing heat treatment warping of long thin forgings with curvature. The tooling has a frame assembly structure, and is divided into a loading carrier part 1, an anti-warping and clamping part 2, an anti-curvature deformation part 3, and a pressure strip 4. The loading carrier part is formed by a three-dimensional connection in the horizontal, vertical and high directions by a casting one-piece molding method. The loading carrier part 1 includes a clamping table 11, a column 12 and a loading carrier 13; the anti-warping and clamping part is composed of a group of pressure strips with holes, i.e., a crossbeam, and the anti-curvature deformation part is composed of another toothed pressure strip and a standard block. The standard block is used to clamp the long thin-walled forging from the top and one side of the slot, and then is added to one end of the toothed pressure strip to achieve lateral positioning.

[0025] The charging carrier part is formed by integral casting.

[0026] The loading carrier part and the separation beam are made of ZG1Cr25Ni20Si2 or ZG2Cr24Ni7Si2 materials.

[0027] The anti-arc deformation part is made of GH4099 material through forging.

[0028] The tooth spacing of the anti-arc deformation part = forging width + 30~100mm.

[0029] The tooth height of the anti-arc deformation part = forging thickness - preset thickness, and the preset thickness ranges from 10 mm to 1 / 2 forging thickness.

[0030] The cross beam of the anti-curvature deformation part is 50 to 100 mm shorter than the cross beam of the anti-warping compression part, and at least 3 groups are used for each curved surface.

[0031] The overall diagram of the tooling is as follows Figure 1 As shown, the tooling loading carrier part is formed by casting Figure 2 As shown, the anti-warping pressing part is as follows Figure 3 The beam shown has the dimensions of 40mm×60mm×1290mm and is provided with weight-reducing holes. The anti-arc deformation part is as follows: Figure 4 The dimensions of the toothed crossbeam shown are: 40 mm × 60 mm × (1290-(30~100)) mm.

[0032] The overall dimensions of the tooling are 1920mm×1380mm×340mm.

[0033] The long thin-walled forgings with arcs will change their dimensions during the heating and cooling process of heat treatment. To prevent the forgings from warping, the specific steps are as follows:

[0034] Step 1: Place the curved long thin-walled forgings evenly and horizontally in the length direction on the loading carrier part of the special tooling, and the parting surface of the curved long thin-walled forgings is parallel to the bottom plane of the carrier;

[0035] Step 2: sequentially clamp a set of pressure strips under the clamping platform on the loading carrier;

[0036] Step 3: Clamp at least 3 anti-curvature warping toothed strips between the forgings and under the clamping table at a time, with the same teeth of the toothed strips spaced apart against the same arc surface of the forging, and the same teeth of the adjacent toothed strips spaced apart against different arc surfaces of the forging.

[0037] For example, there are only three toothed strips, the second one is located at the apex of the arc part of the forging, and all the teeth are close to the outer arc surface of the forging; the first and third toothed strips are located at the two openings of the arc part of the forging, and all the teeth are close to the inner arc surface of the forging.

[0038] Step 4: Use the pressure strip 4 to fill and seal the gap between the pressure strip with holes and the pressure strip with teeth and the card table on the loading carrier. Use the standard block to fill and seal the gap between the pressure strip with teeth and the end column.

[0039] Step 5: Use wedge iron to fill and tighten each place where the long thin-walled forging contacts a set of hole-bearing strips;

[0040] Step 6: Careful lifting should be done during heating in the furnace and cooling out of the furnace to prevent the wedge from loosening.

Claims

1. A special tool for preventing heat treatment warping of long thin-walled forgings with arc, characterized in that: include: A loading carrier portion (1), an anti-warping pressing portion (2), a plurality of anti-curvature deformation portions (3), and a pressure strip (4); The loading carrier part (1) comprises a card table (11), a column (12) and a loading carrier (13); A row of columns (12) are arranged at both ends of the loading carrier (13), and the top ends of the columns extend out of the card table (11) toward the loading carrier (13). A long thin-walled forging with an arc is placed on the loading carrier (13); The anti-arc deformation part (3) is a toothed pressure strip, which is used to position the arc section of the long thin-walled forging; the adjacent teeth of each toothed pressure strip form a clamping groove, clamping the long thin-walled forging from the top and one side, and the clamping grooves at the same position on two adjacent toothed pressure strips clamp the long thin-walled forging from two directions, one left and one right; The anti-warping pressing part (2) is a perforated pressure strip, which is used to position the non-arc section of the long thin-walled forging; The pressure strip (4) is attached to the card table (11) and the column (12) to press down the two ends of the anti-warping pressing part (2) and the two ends of the tight belt tooth pressure strip.

2. The special tooling according to claim 1, characterized in that: The charging carrier part is formed by integral casting.

3. The special tooling according to claim 1, characterized in that: The tooth spacing of the anti-arc deformation part = forging width + 30~100mm.

4. The special tooling according to claim 1, characterized in that: The tooth height of the anti-arc deformation part = forging thickness - preset thickness, and the preset thickness ranges from 10 mm to 1 / 2 forging thickness.

5. The special tooling according to claim 1, characterized in that: When the toothed pressure strip is positioned left or right, it needs to move along the width of the charging carrier (13) until it abuts against the long thin-walled forging from the left or right side; The cross beam of the anti-curvature deformation part is 50 to 100 mm shorter than the cross beam of the anti-warping compression part.

6. The special tooling according to claim 1, characterized in that: At least one set of three toothed strips is used on one curved surface of a long thin-walled forging.

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