Method for correcting levelness out-of-tolerance of anvil block of impact die forging hammer

Abstract

The invention relates to the technical field of impact die forging hammer fault handling, and discloses an impact die forging hammer anvil block levelness out-of-tolerance correction method which comprises the steps that an upper anvil block of an impact die forging hammer is dismantled, and the flatness of a combined surface of a second anvil block and the upper anvil block is primarily repaired; determining a longitudinal and / or transverse levelness error of the two anvil blocks and a target longitudinal and / or transverse levelness error; correspondingly preparing a repairing plate with longitudinal and / or transverse reverse inclined plane characteristics; at least one repairing plate is assembled upwards on the combined surface of the repaired two anvil blocks and the upper anvil block in an overlapped mode, error offset is carried out by forming a compensation relation between the inclined surface of the repairing plate and the levelness error of the two anvil blocks, and the target longitudinal and / or transverse levelness error is met; an upper anvil block is assembled on the top face of the repairing plate; in the process, whether the repairing plate is assembled after being finely repaired is determined; and waterproof treatment is conducted on the joints of the upper anvil block, the repairing plate and the second anvil block, and follow-up construction treatment is completed. And safe, economical, rapid and high-precision levelness out-of-tolerance correction and guarantee use are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of impact die forging hammer fault handling, and particularly relates to a correction method for horizontal level error of anvil of impact die forging hammer. BACKGROUND

[0002] The C86Y-450 type 450KJ full hydraulic die forging hammer weighs about 422 tons, and its anvil assembly includes a third anvil (weighing about 98 tons), a second anvil (weighing about 90 tons), and an upper anvil (weighing about 135 tons), which are sequentially stacked from bottom to top along the axial direction. Figure 1 As shown in the figure, the anvil assembly 1 is installed on a traditional foundation sleeper damping system (about 4 meters below the ground 2), and the traditional foundation includes a foundation engineering, a sleeper damping system, and auxiliary fastening and other main components. The foundation engineering is an integral piece of reinforced concrete block with a volume of about 940m 3 , weighing 2760 tons. The bottom surface is 12m x 12m, the top surface is 7m x 9.5m, the thickness is 9m, and a 5.5m x 3.5m x 1.7m sleeper damping system installation pit is left on the top surface. The horizontal error of the bottom of the sleeper damping system installation pit is ≤2mm / 1000mm, and about 30m 3 sleeper damping system is laid on the top, the sleeper preservative penetrates ≧15mm, the surface is brushed with hot tar or epoxy coal tar 3, and the structure is laid in a staggered and stacked structure. The horizontal error of the sleeper damping system is ≤0.5mm / 1000mm. Then the third anvil, the second anvil, and the upper anvil are installed in stages, and the horizontal level of each anvil needs to meet the standard requirement of 0.5mm / 1000mm. Finally, the anvil assembly 1 is poured with non-shrinkage grouting material around the ground, and the gap between the sleeper damping system installation pit side wall and the third anvil is filled with oak sawdust + asphalt 3 mixture to reduce high-frequency vibration during forging.

[0003] After a long period of use, the horizontal level of the anvil may exceed the horizontal tolerance requirement of 0.5mm / 1000mm, for example, when replacing the upper anvil according to the plan during the implementation of the reconstruction, after removing the old upper anvil, it is found that the longitudinal (width direction) horizontal error of the combined surface of the second anvil and the upper anvil is about 3.12mm / 1000mm, which seriously exceeds the horizontal tolerance requirement of 0.5mm / 1000mm. In this case, the horizontal tolerance of the anvil assembly needs to be restored.

[0004] The conventional method for repairing the levelness error of the anvil (3.12 mm / 1000 mm) requires removing the filling material around the upper, second, and third anvils. Each of the three anvils is then lifted out by a heavy-duty crane for inspection. The sleeper damping system and foundation engineering are also repaired. This involves demolishing and rebuilding the concrete, replacing the sleepers, leveling the surface, and then reassembling the three anvils to complete the correction. The problems with this method are: 1) Traditional foundation construction is very complex, and the equipment foundation and anvil assembly have been in use for over 40 years, resulting in high construction risks; 2) Re-laying the sleepers and other infrastructure requires monitoring the initial settlement of the sleepers, and there is a possibility of uneven settlement requiring re-laying; 3) The overall workload is large, the construction time is long, significantly impacting order delivery, and the repair cost is high. For example, repairing the levelness error of the second anvil takes approximately 60 days and costs about 500,000 yuan; repairing the foundation engineering takes approximately 120 days and costs about 1.5 million yuan. Summary of the Invention

[0005] This invention aims to provide a method for correcting the levelness deviation of the anvil of an impact forging hammer. Under the premise of ensuring safety, it can accurately judge the actual situation and quickly formulate a direct and reliable solution, maximize the use of existing infrastructure, reduce cost investment, and quickly restore equipment use. It achieves levelness deviation correction that is safe, economical, fast, highly accurate, has a long retention time, and minimizes production interference.

[0006] The basic solution provided by this invention is: a method for correcting the out-of-tolerance levelness of the anvil seat of an impact forging hammer, comprising: S1. After removing the upper anvil of the impact forging hammer, perform initial flatness repair on the surface of the combination of the second anvil and the upper anvil, and determine the longitudinal and / or transverse horizontal error of the second anvil and the target longitudinal and / or transverse horizontal error. S2, based on the longitudinal and / or transverse horizontality errors of the two anvils, a repair plate with longitudinal reverse slope characteristics and / or a repair plate with transverse reverse slope characteristics are prepared accordingly. S3, At least one repair plate is superimposed and mounted on the combined surface of the repaired second anvil and the upper anvil. The longitudinal and / or transverse reverse slopes of the repair plate and the longitudinal and / or transverse horizontality errors of the second anvil form a compensation relationship with opposite directions and matching values ​​to cancel the error, and make the mating surface of the repair plate and the upper anvil meet the target longitudinal and / or transverse horizontality error. S4, assemble the anvil onto the top surface of the repair board; In S3 and S4, it is determined whether to finely repair the repair plate before assembly based on the accuracy of the mating surfaces of the repair plate and the second and upper anvils. S5, perform waterproofing treatment at the joints of the upper anvil, repair board, and second anvil, and complete subsequent construction treatment.

[0007] The basic principle and advantages of the present application are: The present application evaluates the most possible cause of the change in anvil level according to the actual situation, finds that the service life of the C30 concrete foundation engineering is generally more than 60 years by deeply analyzing the drainage facilities around the impact die forging hammer and the traditional foundation manufacturing process, combining with the local climate conditions, because the conventional service life of the impact die forging hammer is only 40 years or so, therefore the risk of strength loss of the foundation engineering is small, and the most possible cause of the change in level is the local compaction of the sleeper damping system or the accumulation of slight settlement of the whole traditional foundation. Since the actual deviation is mainly caused by the unevenness of the sleeper upper plane, the traditional method often needs to intervene in the foundation structure on a large scale, which not only consumes time and effort, but also easily causes chain assembly problems.

[0008] The plane of the actual level deviation is the sleeper upper plane, and the impact force of the C86Y-450 type 450KJ full hydraulic die forging hammer is large, so the solution should be safe and reliable, and the provided correction method can significantly improve the repair efficiency and engineering feasibility of the large anvil system under the condition of level deviation.

[0009] The present application realizes efficient recovery of the overall horizontal precision by means of a clever local compensation mechanism under the premise of completely preserving the original foundation and the lower structure (the traditional foundation below the second anvil is not treated, and only the upper anvil is removed), that is, by adding a repair plate between the upper anvil and the second anvil to compensate for the level deviation, and then replacing the upper anvil according to the equipment modification plan, which greatly shortens the downtime cycle, effectively avoids the production delay and secondary error risk caused by long-term disassembly and modification. At the same time, this method avoids disturbing the load-bearing foundation, ensures the stability of long-term operation of the equipment, and significantly reduces the cost of manpower, materials and safety control. Especially in high-temperature, heavy-duty or continuous operation environment, it can quickly respond and accurately correct to ensure that the detection or processing reference surface quickly returns to a high-precision state, so as to realize safe, economic, fast, high-precision, long-time maintenance, and less production interference under the premise of not affecting the overall reliability of the system, while reducing the maintenance cost and repair period of the forging hammer, solving the drawbacks of the traditional way of replacing the sleeper after re-modifying the foundation, and meeting the repair and disposal method of the precision deviation of the anvil and foundation level of the forged hammer. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic diagram of the installation of the anvil of the C86Y-450 type 450KJ full hydraulic die forging hammer and the traditional foundation; Figure 2 It is a flowchart of a correction method for the level deviation of the anvil of the impact die forging hammer provided by the embodiment of the present application; Figure 3This is a schematic diagram of the structure of the process pad provided in an embodiment of the present invention; Figure 4 for Figure 3 Sectional view of AA; Figure 5 for Figure 4 A partial view at point B; Figure 6 This is a schematic diagram of the repair plate provided in an embodiment of the present invention; Figure 7 for Figure 6 Sectional view of AA; Figure 8 for Figure 7 A partial view at point B; Figure 9 This is a schematic diagram of the structure of the repair plate and process pad assembly provided in an embodiment of the present invention; The markings in the accompanying drawings of the instruction manual include: 1. Anvil assembly, 11. Parting surface, 12. Ground, 2. Asphalt, 3. Process pad, 4. Step slope, 41. Repair plate, 5. "U" shaped pad, 51. Square pad, 52. Combined surface of repair plate and process pad, 6. Processing equipment, 7. Milling and removing part of repair plate, 8. Detailed Implementation

[0011] The following detailed explanation illustrates the specific implementation methods: The basic implementation examples are as follows: Figure 2 As shown: A method for correcting out-of-tolerance levelness of an anvil seat for impact forging hammers, comprising: S1. After removing the upper anvil of the impact forging hammer, perform initial flatness repair on the surface of the combination of the second anvil and the upper anvil, and determine the longitudinal and / or transverse horizontal error of the second anvil and the target longitudinal and / or transverse horizontal error. S2, based on the longitudinal and / or transverse horizontality errors of the two anvils, a repair plate 5 with longitudinal reverse slope characteristics and / or a repair plate 5 with transverse reverse slope characteristics are prepared accordingly. S3, At least one repair plate 5 is superimposed and mounted on the combined surface of the repaired second anvil and the upper anvil. The longitudinal and / or transverse reverse slopes of the repair plate 5 and the longitudinal and / or transverse horizontality errors of the second anvil are respectively used to form a compensation relationship with opposite directions and matching values ​​to cancel the error, and make the mating surface of the repair plate 5 and the upper anvil meet the target longitudinal and / or transverse horizontality error. S4, assemble the anvil onto the top surface of the repair plate 5; In S3 and S4, it is determined whether to finely repair the repair plate 5 before assembly based on the accuracy of the mating surfaces of the repair plate 5, the second anvil, and the upper anvil. S5, perform waterproofing treatment at the joints of the upper anvil, repair board 5, and the second anvil, and complete the subsequent construction treatment.

[0012] Specifically: In S1, the correction can be started after the upper anvil of the impact die forging hammer is removed, the traditional foundation below the two anvils is not processed, and only the levelness error between the upper anvil and the two anvils is compensated, and then the upper anvil and subsequent construction processing are replaced according to the equipment modification plan.

[0013] In S1, the planeness of the combined surface of the two anvils and the upper anvil (i.e., the top surface of the two anvils facing the upper anvil) is repaired by manual scraping to reach 0.1 mm / 1000 mm, so as to better fit with the repair plate 5. In principle, 0.5 mm / 1000 mm can meet the requirements, but the requirement of 0.1 mm / 1000 mm in this embodiment is because the two anvils are a well-worn rigid reference, which can reach such high precision requirements by manual scraping, and at the same time, it can leave room for the assembly precision of the rear.

[0014] The longitudinal and / or transverse levelness error of the two anvils is accurately measured again by the level. In this embodiment: the transverse (length direction of the anvil cross section) levelness error is qualified (0.3 mm / 1000 mm, less than the standard levelness error of 0.5 mm / 1000 mm), and the longitudinal (width direction of the anvil cross section) levelness error is 3.12 mm / 1000 mm. Therefore, the repair plate 5 with a longitudinal reverse slope feature is prepared to determine the repair of the longitudinal levelness error of the two anvils, reaching 0.2 mm / 1000 mm. In other embodiments, if the longitudinal levelness error is qualified and the transverse levelness error is not qualified, the repair plate 5 with a transverse reverse slope feature is prepared to determine the repair of the transverse levelness error of the two anvils, reaching 0.2 mm / 1000 mm. If both the transverse and longitudinal levelness errors are not qualified, two repair plates 5 (a repair plate 5 with a longitudinal reverse slope feature and a repair plate 5 with a transverse reverse slope feature) are prepared and stacked upward.

[0015] In this embodiment, the target longitudinal and / or transverse levelness error after repair reaches 0.2 mm / 1000 mm, which is better than the standard 0.5 mm / 1000 mm, leaving a wear allowance of 0.3 mm / 1000 mm to ensure that after one year of running-in period, it can still meet the standard of 0.5 mm / 1000 mm.

[0016] In S2, because the upper anvil and the two anvils have longitudinal positioning keys and transverse positioning pins, square pads 52 are designed on the positioning keys, and positioning pin holes are left; the two side surfaces need to be designed as "mouth" type pads 51, and the two ends need to be connected by a predetermined width (about 400 mm) of reinforcing ribs, that is, a continuous solid part of a certain width at the end of the pad body material is reserved as a structure reinforcing area; the levelness repair plate 5 is composed of the "mouth" type pad 51 and the square pad 52 matched with the "mouth" type (as shown inFigure 6 、 Figure 7 , Figure 8 .

[0017] Material selection of the level repair plate 5: since the materials of the upper anvil and the second anvil are both ZG25 (ZG230-450), the material of the level repair plate 5 needs to match the strength and have sufficient toughness to prevent excessive wear or damage during use. Therefore, the commonly used and inexpensive 25Mn steel plate is determined to be selected.

[0018] In S3, at least one repair plate 5 is stacked on the combined surface of the second anvil and the upper anvil in an upward assembly. The longitudinal and transverse reverse bevels of the repair plate 5 and the longitudinal and transverse level error of the combined surface form a complement, so that the repair plate 5 and the upper anvil satisfy the target longitudinal and / or transverse level error. In this embodiment, the level requirement of 0.2 mm / 1000 mm is reached.

[0019] The precision control requirements in S3 and S4 include at least one of the bonding surface fit requirement, the number of effective contact points requirement, the area and position requirement of a single non-fitting point, and the distance requirement between adjacent non-fitting points. Specifically, the precision control: the bonding surface fit of the level repair plate 5 and the upper anvil and the second anvil needs to be ≥90%, the number of effective contact points within 25mm×25mm needs to be ≥6, the area of a single non-fitting point needs to be ≤200mm×200mm, and the non-fitting point needs to be not around the bonding surface, and the distance between adjacent non-fitting points needs to be ≥1000mm.

[0020] In S3, the repair plate 5 is assembled. The contact indicator (such as red lead) is applied on the top surface of the second anvil, the distribution of the contact spots of the repair plate 5 and the second anvil is checked, the repair plate 5 is finely repaired by manual scraping, and the bonding surface of the repair plate 5 and the second anvil is ensured to meet the precision control requirement. The level of the repair plate 5 is detected, and the precision requirement is reached by manual grinding process.

[0021] If the longitudinal and transverse level errors exist on the combined surface of the second anvil and the upper anvil, two repair plates 5 are prepared: a repair plate 5 with a longitudinal reverse bevel feature and a repair plate 5 with a transverse reverse bevel feature. When assembling, one repair plate 5 is assembled on the top surface of the second anvil first; then another repair plate 5 is stacked and assembled on the repair plate 5. Both repair plates 5 also need to meet the precision requirement. The contact indicator (such as red lead) is applied on the top surface of the assembled repair plate 5, the distribution of the contact spots of the two repair plates 5 is checked, the repair plate 5 is finely repaired by manual scraping, and the bonding surface of the two repair plates 5 is ensured to meet the precision control requirement. The level of the repair plate 5 is detected, and the precision requirement is reached by manual grinding process.

[0022] S4, the new anvil is assembled. The contact indicator (such as red lead) is applied to the bottom surface of the upper anvil, the contact spot distribution of the repair plate 5 with the upper anvil is checked, and the repair plate 5 is manually scraped to ensure that the fitting surface of the repair plate 5 with the upper anvil meets the accuracy control requirements.

[0023] In S5, waterproof treatment is performed at the joint of the upper anvil, the repair plate 5, and the lower anvil to prevent sewage, sand, and other impurities from entering and affecting the treatment effect. Other construction projects are completed according to the technical requirements of the 450KJ full-hydraulic die forging hammer.

[0024] In addition, after the impact die forging hammer is put into production, the levelness change of the anvil is monitored regularly. The results of the implementation of the method verify that after the implementation of the scheme, the levelness of the anvil will be completely solved. In a long period of time, the lower part of the anvil does not need to be overhauled again, and the foundation part does not need to be considered again. The subsequent maintenance content is more on the maintenance of the hammer body, hydraulic system, and electrical system. The repair of the anvil levelness also makes the service life of the wear parts longer and the replacement frequency lower.

[0025] The correction method for the levelness of the anvil of the impact die forging hammer provided in the embodiment adds the repair plate 5 between the anvil blocks of various forging hammers to quickly restore the performance of the equipment, while reducing the maintenance cost and repair period of the forging hammer, solving the drawbacks of the traditional way of replacing the sleeper after re-correcting the foundation, and meeting the repair treatment method for the accuracy of the levelness of the anvil and the foundation of the forging hammer.

[0026] Embodiment Two Different from Embodiment One, the repair plate 5 in S2 is a large-size thin plate structure, and the processing method includes: After the repair plate 5 is cut according to the shape, a plurality of clamping process blocks are arranged on the circumference of the plate; a process base plate 4 having a slope surface formed by a plurality of small steps consistent with the longitudinal or transverse levelness error of the lower anvil is prepared, and a plurality of clamping process blocks are also arranged on the circumference of the process base plate 4; The clamping process blocks of the plate and the process base plate 4 are each provided with a clamping process hole matched with the T-shaped slot of the workbench of the high-precision numerical control processing equipment 7, the clamping process hole is connected with the T-shaped nut of the workbench through a fastener, and a circumferential pressing mechanism is additionally provided to relatively fix the plate and / or the process base plate 4 with the workbench to control the deformation amount of the plate during processing (such as being controlled within 0.05 mm); After the plate is fixed separately and turned over, the process base plate 4 is combined and fixed on the workbench based on the preset positioning reference surface to perform precise processing of the flatness of both sides, and then is cut and formed by numerical control laser to obtain the repair plate 5 with the longitudinal reverse slope characteristic or the repair plate 5 with the transverse reverse slope characteristic, both of which meet the standard requirement of ≤0.05 mm / 1000 mm in the flatness of both sides.

[0027] Specifically, the method for preparing the repair plate 5 of the longitudinal reverse bevel feature is taken as an example to illustrate the process.

[0028] S21, preparing the processing equipment 7: According to the drawing of the 450KJ full-hydraulic die forging hammer level repair plate 5 (hereinafter referred to as the repair plate 5), the processing equipment 7 workbench size needs to meet 8000mm*3000mm, and needs high-precision numerical control processing equipment 7, finally the XHA2130CX80 type numerical control gantry boring and milling machining center (hereinafter referred to as the processing equipment 7) can meet the requirements.

[0029] S22, processing the process pad plate 4, as shown in Figure 3 、 Figure 4 and Figure 5 : According to the performance of the processing equipment 7, in order to meet the requirements of the repair plate 5 drawing, the process pad plate 4 needs to be made to meet the accuracy control requirements of the bonding surface in S3 and S4. The process pad plate 4 processing technical requirements are as follows: a) The outer shape can be processed by a numerical control laser cutting machine.

[0030] b) The process block is welded and clamped around the plate according to the T-shaped groove position of the processing equipment 7 workbench.

[0031] c) Process 6- 25 machine clamping process holes according to the drawing.

[0032] d) 25 holes upward, use M24 internal hexagon bolts to pass through the clamping process holes and connect the “T” type nut in the “T” type groove of the workbench, press the product, then press the clamping process block around, ensure that the 0.1mm plug gauge does not enter, the 0.05mm plug gauge is plugged into ≤50mm, process one side of the plate flat, the flatness is ≤0.05mm / 1000mm. The lightness is 90%, and the single non-light area is ≤200mm*200mm, and the clamping point can be polished below the processing surface.

[0033] e) Turn over and find the parallelism between the 5300mm side and the X-axis of the processing equipment 7 ≤2mm / 1000mm.

[0034] f) Use M24 internal hexagon bolts to pass through the clamping process holes, connect the “T” type nut in the “T” type groove of the workbench, press the product, then press the clamping process block around, the 0.1mm plug gauge does not enter, the 0.05mm plug gauge is plugged into ≤50mm (except for the non-light and polishing area).

[0035] g) Use a diameter greater than 50 right angle face milling cutter numerical control processing bevel, the bevel is combined by several small steps. Because the milling cannot directly process roughness Ra3.2 of large size thin plate bevel (2080 mm x 4570 mm level), it is necessary to prefabricate large size process pad 4 (2080 mm x 4570 mm level) combined by several small steps to form reverse bevel, and form complement with repair plate 5, so that the roughness Ra3.2 of large size thin plate bevel can be processed by milling. For example Figure 9 .

[0036] h) Acute angle blunt.

[0037] S23, process repair plate 5, as shown in Figure 6 、 Figure 7 and Figure 8 : a) The shape (2080 mm x 4570 mm) is processed by numerical control laser cutting machine.

[0038] b) The process block is welded and clamped around the plate according to the position of the T-shaped groove of the workbench of the processing equipment 7.

[0039] c) Process 6- 25 / 39 clamping process holes.

[0040] d) 25 holes upward, use M24 internal hexagonal bolt to pass through clamping process holes and connect with "T" shaped nut in "T" shaped groove of workbench, press repair plate 5, then press clamping process block around, ensure that 0.1 mm plug gauge does not enter, 0.05 mm plug gauge is plugged into ≤50 mm, process one side of the plate flat, flatness ≤0.05 mm / 1000 mm.

[0041] e) As shown in Figure 9 , turn over and stick to the flat surface of process pad 4 to form a combination (process pad 4 step bevel 41 faces the equipment workbench, and the combination surface 6 of repair plate and process pad is as shown in Figure 9 ), find the same side surface of 5300 mm of process pad 4 and repair plate 5, and the parallelism of X axis of numerical control longmen boring and milling machining center ≤ preset parallelism (2 mm / 1000 mm).

[0042] f) Use M24 internal hexagonal bolt to pass through clamping process holes and connect with "T" shaped nut in "T" shaped groove of workbench, press the combination, then press clamping process block around with pressing plate, ensure that 0.1 mm plug gauge does not enter, 0.05 mm plug gauge is plugged into ≤50 mm, and the tip angle at both ends of step surface 41.

[0043] g) The top surface is numerically controlled machined with a face milling cutter with a diameter greater than 200 mm to meet the drawing requirements, with a flatness of ≤0.05 mm / 1000 mm. The final repair plate is milled to remove part 8 as shown in Figure 9 shown by the dotted line.

[0044] h) The "mouth" shaped pad plate, square pad plate and R102.5 waist hole are cut by a numerical control laser cutting machine according to the drawing.

[0045] i) All acute angles are rounded off.

[0046] The correction method for the horizontality of the impact die forging hammer anvil provided by the embodiment solves the technical problems of easy deformation and difficult high flatness of large-size thin plates (2080 mm x 4570 mm) on conventional machine tools by a special clamping, machining and surface alignment process system for large-size thin plates, and realizes the control of the ultra-high flatness of the repair plate on ordinary equipment. The method does not use an expensive constant-temperature workshop or a complex stress relief process, but solves the technical problems of easy deformation and difficult high flatness of large-size thin plates (2080 mm x 4570 mm) on conventional machine tools by a special clamping structure + double-sided step-by-step machining + reference surface alignment. The clamping process block is cooperatively designed with the T-shaped groove to realize "center tensioning + four-way compression" composite constraint, effectively suppresses cutting vibration and thermal deformation, introduces a process pad plate and a shared positioning reference during surface machining to avoid cumulative error and ensure double-sided parallelism and overall flatness, and the final product can be directly used for on-site assembly, replacing online adjustment by mechanical compensation, greatly improving the installation efficiency and precision of high-temperature / heavy equipment.

[0047] The above is only an embodiment of the present application, and common knowledge of specific structures and properties in the scheme is not described in detail. Ordinary technical personnel in the field know all ordinary technical knowledge in the field before the application date or the priority date, can know all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technical personnel in the field can improve and implement the scheme based on their own ability under the guidance of this application, and some typical known structures or known methods should not be an obstacle for ordinary technical personnel to implement the present application. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered within the scope of protection of the present application, and these will not affect the effect and practicality of the patent.

Claims

1. A method of correcting a horizontality error of a die forging hammer anvil, characterized by, The method comprises the following steps: S1, after removing the upper anvil of the impact forging hammer, the flatness of the combined surface of the upper anvil and the lower anvil is initially repaired, and the longitudinal and / or transverse levelness error of the lower anvil and the target longitudinal and / or transverse levelness error are determined; S2, based on the longitudinal and / or transverse levelness error of the lower anvil, a repair plate with a longitudinal reverse slope feature and / or a repair plate with a transverse reverse slope feature is prepared; S3, at least one repair plate is assembled on the combined surface of the repaired lower anvil and the upper anvil, and the longitudinal and / or transverse reverse slope of the repair plate forms a compensation relationship with the longitudinal and / or transverse levelness error of the lower anvil in the opposite direction and with the same amount, so as to offset the error and make the repair plate and the upper anvil meet the target longitudinal and / or transverse levelness error; S4, the upper anvil is assembled on the top surface of the repair plate; In S3 and S4, whether the repair plate is repaired again before assembly is determined according to the combined surface accuracy of the repair plate and the lower anvil and the upper anvil; S5, waterproof treatment is performed at the combined positions of the upper anvil, the repair plate and the lower anvil, and subsequent construction treatment is completed.

2. The method of claim 1, wherein the method further comprises: In S1, the combined surface flatness is initially repaired by manual scraping.

3. The method of claim 1, wherein the method further comprises: In S2, the repair plate is composed of a "mouth" shaped pad plate and a square pad plate matched with the "mouth" shaped pad plate; the square pad plate is provided with a positioning pin hole, and the "mouth" shaped pad plate is provided with a reinforcing rib with a preset width at both ends.

4. The method of claim 1, wherein the method further comprises: In S2, the repair plate processing method comprises: The plate material formed by blanking the outer shape of the repair plate and the prefabricated process pad plate with the same longitudinal or transverse levelness error as the lower anvil and formed by combining several small steps to form a slope are both designed to have a clamping structure, the plate material is separately fixed and flipped, and then aligned and fixed on the workbench of a high-precision numerical control machining equipment based on a preset positioning reference surface for precise machining of the flatness of both surfaces, and then cut and formed by numerical control laser to obtain a repair plate with a longitudinal reverse slope feature or a repair plate with a transverse reverse slope feature.

5. The method for correcting the out-of-tolerance levelness of the anvil seat of an impact forging hammer according to claim 4, characterized in that, A plurality of clamping process blocks are arranged on the circumference of the plate material and the process pad plate, and a clamping process hole matched with the T-shaped slot of the workbench is formed on each clamping process block, the workbench T-shaped nut is connected through the fastener penetrating the clamping process hole, and the plate material and / or the process pad plate are relatively fixed with the workbench by means of a circumferential pressing mechanism.

6. The method of claim 4, wherein the method further comprises: The parallelism between the combined body formed by aligning the process pad plate based on the preset positioning reference surface after the plate material is flipped and the X-axis of the numerical control gantry boring and milling machining center is ≤ the preset parallelism.

7. The method of claim 4, wherein the step of adjusting the horizontal level of the anvil of the impact mo ld- forging hammer further comprises the step of: The flat surfaces of the process pad plates are combined after the plate material is flipped and aligned based on the preset positioning reference surface, and the slope surfaces of the process pad plates face the workbench.

8. The method of claim 1, wherein the method further comprises: In S3 and S4, the control requirements of the accuracy include at least one of the following: the combined surface adhesion requirement, the effective contact point quantity requirement, the single non-adhesion point area and position requirement, and the adjacent non-adhesion point distance requirement.

9. A method for correcting the out-of-tolerance levelness of an impact forging hammer anvil according to claim 8, characterized in that, The combined surface adhesion is ≥ 90%; the effective contact points within 25mm×25mm are ≥ 6; the single non-adhesion point area is ≤ 200×200mm, and cannot be around the adhesion surface; and the distance between adjacent non-adhesion points is ≥ 1000mm.

10. The method of claim 1, wherein the method further comprises: The contact indicator is applied on the top surface of the double anvil or the bottom surface of the upper anvil, the contact spot distribution of the repair plate with the double anvil or the upper anvil is checked, and the repair plate is finely scraped by hand to ensure that the contact surface of the repair plate with the double anvil or the upper anvil meets the accuracy control requirements.

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