Anchor plate strain and hardening and tempering dual-strengthening machining method and automatic production line of anchor plate strain and hardening and tempering dual-strengthening machining method

Abstract

The invention discloses an anchor plate strain and hardening and tempering dual-strengthening machining method and an automatic production line thereof, and the method comprises the following steps: S1, placing hot-rolled round steel in a circular sawing machine, cutting the hot-rolled round steel into cylindrical workpieces with different lengths by the circular sawing machine for blanking, and completing a preliminary blanking procedure; the heat treatment device is simple in structure, the heat treatment procedure is executed in advance, the cylinder material is directly subjected to heat treatment, the problem of cracking possibly occurring in the quenching process is effectively solved, and the new challenge that the core strength is insufficient is also caused, so that the stress strengthening technology is introduced, the core strength problem caused by a new heat treatment process is solved, and the service life of the cylinder material is prolonged. The overall strength of the anchor plate is further improved, the effect of the anchor plate exceeds that of a traditional technology, in addition, machining procedures are concentrated and combined, procedure turnover is greatly reduced, manpower and machining cost are saved, and turnover efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchor plate processing, in particular to a processing method for anchor plate strain and tempering dual strengthening and an automated production line thereof. Background Art

[0002] In the fields of construction, bridges and other civil engineering, anchor plates, as key components of clip-type anchors, undertake the important task of anchoring steel strands. In order to ensure the effective fixation of steel strands, a single tapered hole must be able to withstand an axial compressive stress of up to 26 tons, especially in railway applications. This places extremely high demands on the material properties of the anchor plates. Therefore, in order to prevent deformation or failure of the anchor plates during use, special strengthening treatment is usually required for the anchor plates to ensure that they have sufficient compressive strength, hardness, toughness and fatigue resistance. Quenching and tempering treatment, as a strengthening method widely used in high-quality carbon structural steel, can effectively improve the various mechanical properties of steel by precisely controlling the heating and cooling process of steel.

[0003] However, the existing anchor plate manufacturing process is cutting - rough turning - drilling, rough reaming - heat treatment - fine turning - fine reaming - chamfering - coding, but drilling and reaming are performed first, and then heat treatment is performed. When holes are processed in the middle of the product, due to the small spacing between the holes, the local thickness is thin and the thickness is uneven, the cooling rate may be uneven during the quenching process, resulting in a large temperature gradient and thermal stress, which exceeds the bearing capacity of the material and eventually causes cracks inside and on the surface of the product, resulting in product scrapping. Secondly, due to the lack of continuity in the existing process, automated production is difficult to achieve. The independence of each process and the complex material turnover result in low overall processing efficiency and low utilization efficiency of human resources, which directly affects the market competitiveness of the product.

[0004] In view of the above problems, it is particularly important to develop a processing method for double strengthening of anchor plate strain and tempering and its automated production line. Summary of the invention

[0005] The object of the present invention is to provide a processing method for strain and tempering dual strengthening of an anchor plate and an automated production line thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a processing method for strain and tempering dual strengthening of anchor plates, comprising the following steps:

[0007] S1. Place the hot-rolled round steel in a circular saw machine, cut it into cylindrical workpieces of varying lengths by the circular saw machine, and then cut it into pieces, completing the initial cutting process;

[0008] S2, sending the cut cylindrical workpieces into a continuous heat treatment furnace in sequence for quenching and tempering heat treatment;

[0009] S3. Finally, the heat-treated workpiece will be sent to the automated machining production line for further machining.

[0010] As a further solution of the present invention: Step S3 comprises the following steps:

[0011] S31: The heat-treated workpiece is loaded through a conveyor belt, and the workpiece is conveyed to one side of the first stop plate through the conveyor belt;

[0012] S32: grabbing the workpiece at the first stop plate by the first manipulator and transporting it to the jaws of the CNC lathe for fine turning. After fine turning, the workpiece is grabbed by the first manipulator and placed on the conveyor belt on the other side of the first stop plate. The workpiece is transported to a position between the first stop plate and the second stop plate by the conveyor belt.

[0013] S33: grab the workpiece by the second manipulator and transport it to the jaws of the CNC double-head drilling machine to complete the processing of the cylindrical hole and the tapered hole of the anchor plate. After the processing is completed, grab the workpiece by the second manipulator to the specific tooling position of the strain hardening device;

[0014] S34: Turn on the strain hardening device to apply a compressive stress of a set weight to the cone hole of the anchor plate, so that the cone hole of the anchor plate generates stress deformation, and the cone hole is finally formed.

[0015] As a further solution of the present invention: during the finishing process, a CNC lathe is used to perform preliminary finishing processing on the end face and outer circle of one side of the workpiece; after completion, the first robot re-grasps the workpiece that has been partially processed, and performs a 180-degree flip operation to perform finishing processing on the end face and outer circle of the other side of the workpiece.

[0016] As a further solution of the present invention: the step S1 and / or step S2 and / or step S3 are all controlled in linkage by an automatic control system.

[0017] An anchor plate strain and tempering dual strengthening automated production line comprises a circular saw machine, a heat treatment continuous furnace, a CNC lathe, a CNC double-head drilling machine and a strain hardening device which are arranged in sequence. The CNC lathe, the CNC double-head drilling machine and the strain hardening device are connected via a conveyor belt, a first manipulator and a second manipulator.

[0018] As a further solution of the present invention: a first stop plate and a second stop plate for limiting the position of the workpiece are respectively installed on the conveyor belt, and the first stop plate and the second stop plate are located between the first manipulator and the second manipulator.

[0019] As a further solution of the present invention: the conveyor belt is divided into a first stage, a second stage and a third stage by a first stop plate and a second stop plate, wherein the first stage is the area between the initial end of the conveyor belt and the first stop plate, the second stage is the area between the first stop plate and the second stop plate, and the third stage is the area between the second stop plate and the tail end of the conveyor belt.

[0020] As a further solution of the present invention: the strain hardening device includes a stamping tool and a positioning tool, the positioning tool is provided with a protruding block protruding upward, and the stamping tool is provided with a replaceable product marking header.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The core process of this application includes executing the heat treatment process in advance. By directly heat treating the cylindrical material, the cracking problem that may occur during the quenching process is effectively avoided. However, this also leads to the new challenge of insufficient core strength. For this reason, stress strengthening technology is introduced, which not only solves the core strength problem caused by the new heat treatment process, but also further improves the overall strength of the anchor plate, surpassing the effect of traditional processes. In addition, by concentrating and merging the mechanical processing processes, the process turnover is greatly reduced, saving manpower and processing costs, and improving turnover efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the anchor plate strain and quenching and tempering dual strengthening automated production line of the present invention;

[0024] Figure 2 It is a schematic diagram of the anchor plate strain and quenching and tempering dual strengthening processing steps of the present invention;

[0025] Figure 3 is a schematic diagram of a strain hardening device of the present invention;

[0026] In the figure: 1. Circular saw machine; 2. Continuous heat treatment furnace; 3. CNC lathe; 4. Conveyor belt; 5. First stop plate; 6. CNC double-head drilling machine; 7. Second stop plate; 8. Strain hardening device; 9. First manipulator; 10. Second manipulator. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-3In an embodiment of the present invention, a processing method for strain and tempering dual strengthening of an anchor plate comprises the following steps:

[0029] S1. Place the hot-rolled round steel in a circular saw machine 1, which cuts the round steel into cylindrical workpieces of varying lengths for blanking, completing a preliminary blanking process. Further, the circular saw machine 1 is used to cut the solid cylindrical blank into solid short cylindrical workpieces of varying thicknesses of 50-100 mm. This not only improves the utilization rate of raw materials, but also can meet the production needs of anchor plates of different specifications; at the same time, the cutting parameters can be adjusted according to specific needs to produce workpieces of different thicknesses, which makes the entire production process more flexible and can quickly respond to changes in market demand.

[0030] S2. The cut cylindrical workpieces are sequentially fed into the heat treatment continuous furnace 2 for tempering heat treatment. Furthermore, the use of the heat treatment continuous furnace 2 realizes the automatic feeding and discharging of the workpieces, greatly improving the continuity and automation of the production process; reducing the links of manual handling and operation, reducing labor intensity, and ensuring the uniformity of heat treatment and performance improvement of the workpieces, thereby significantly improving production efficiency and product quality.

[0031] S3. The workpiece that has been heat treated will be sent to the automated machining production line for further machining;

[0032] The step S1 and / or step S2 and / or step S3 are all controlled in linkage by an automatic control system.

[0033] The step S3 comprises the following steps:

[0034] S31: The heat-treated workpiece is loaded through the conveyor belt 4, and the workpiece is conveyed to one side of the first stop plate 5 through the conveyor belt 4;

[0035] S32: The first manipulator 9 grabs the workpiece at the first stop plate 5 and transports it to the jaws of the CNC lathe 3 for finish turning. After the finish turning, the first manipulator 9 grabs the workpiece and places it on the conveyor belt 4 on the other side of the first stop plate 5. The workpiece is conveyed to the position between the first stop plate 5 and the second stop plate 7 through the conveyor belt 4. During the finish turning process, the CNC lathe 3 is used to perform preliminary finish turning on one side end face and outer circle of the workpiece. After completion, the first manipulator 9 re-grasps the partially processed workpiece, performs a 180-degree flip operation, and performs finish turning on the other side end face and outer circle of the workpiece.

[0036] S33: The workpiece is grabbed by the second manipulator 10 and transported to the jaws of the CNC double-head drilling machine 6 to complete the processing of the cylindrical hole and the tapered hole of the anchor plate. After the processing is completed, the workpiece is grabbed by the second manipulator 10 and moved to the specific tooling position of the strain hardening device 8; further, the use of the second manipulator 10 realizes the automatic grabbing and handling of the workpiece, reduces human intervention, and improves the degree of automation of the production process. At the same time, automated handling reduces the errors caused by human operation and improves the stability and reliability of the production process.

[0037] S34: Turn on the strain hardening device 8 to apply a compressive stress of a set weight to the cone hole of the anchor plate, so that the cone hole of the anchor plate generates stress deformation, and the cone hole is finally formed.

[0038] See also Figure 1-2 An anchor plate strain and tempering dual strengthening automated production line includes a circular saw machine 1, a heat treatment continuous furnace 2, a CNC lathe 3, a CNC double-head drilling machine 6 and a strain hardening device 8 which are arranged in sequence. The CNC lathe 3, the CNC double-head drilling machine 6 and the strain hardening device 8 are connected by a conveyor belt 4, a first manipulator 9 and a second manipulator 10.

[0039] See also Figure 1 In one embodiment, in this embodiment, preferably, the conveyor belt 4 is respectively installed with a first stop plate 5 and a second stop plate 7 for limiting the position of the workpiece, the first stop plate 5 and the second stop plate 7 are located between the first manipulator 9 and the second manipulator 10, and the conveyor belt 4 is divided into a first stage, a second stage and a third stage by the first stop plate 5 and the second stop plate 7, wherein the first stage is the area between the initial end of the conveyor belt 4 and the first stop plate 5, the second stage is the area between the first stop plate 5 and the second stop plate 7, and the third stage is the area between the second stop plate 7 and the tail end of the conveyor belt 4. Furthermore, by installing the first stop plate 5 and the second stop plate 7 on the conveyor belt 4, the conveyor belt is divided into three stages, which not only improves the positioning accuracy of the workpiece and the orderliness of the production process, but also significantly improves the production efficiency and product quality, and enhances the automation level and flexibility of the entire production system.

[0040] Specifically, the area of ​​the first stage is used to receive the workpiece after heat treatment and its position is limited by the first stop plate 5, which is convenient for the first robot 9 to clamp and transport it. Secondly, the area of ​​the second stage is used to receive the workpiece after fine bed processing, and its position is limited by the second stop plate 7, which is convenient for the first robot 9 to clamp and transport the workpiece. The area of ​​the third stage is used to receive the workpiece after hole processing. This section of the process is completed by the first robot 9 and the conveyor belt 4. The workpiece entering the third stage area is completed by the second robot 10 and sent to the specific tooling position of the strain hardening device 8. Compared with the existing process, the machining process is concentrated to realize the simplification of rough machining and fine machining, and strain hardening is used to simultaneously realize chamfering and marking forming, and the number of processes is greatly reduced.

[0041] See also Figure 3 In one embodiment, in this embodiment, preferably, the strain hardening device 8 includes a stamping tool and a positioning tool, and the anchor plate is arranged between the positioning tool and the stamping tool, wherein the stamping tool is provided with a replaceable product marking header and a protruding block, and under the action of the protruding block, the 45-degree chamfer of the straight hole of the anchor plate is stamped and formed, and under the action of the product marking header, the marking stamping is realized while strain hardening, and the positioning tool can limit the position of the anchor plate.

[0042] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0043] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A processing method for anchor plate strain and tempering dual strengthening, characterized in that: The following steps are involved: S1. Place the hot-rolled round steel in a circular saw machine, cut it into cylindrical workpieces of varying lengths by the circular saw machine, and then cut it into pieces, completing the initial cutting process; S2, sending the cut cylindrical workpieces into a continuous heat treatment furnace in sequence for quenching and tempering heat treatment; S3. Finally, the heat-treated workpiece will be sent to the automated machining production line for further machining.

2. The anchor plate strain and tempering dual strengthening processing method according to claim 1 is characterized in that: The step S3 comprises the following steps: S31: The heat-treated workpiece is loaded through a conveyor belt, and the workpiece is conveyed to one side of the first stop plate through the conveyor belt; S32: grabbing the workpiece at the first stop plate by the first manipulator and transporting it to the jaws of the CNC lathe for fine turning. After fine turning, the workpiece is grabbed by the first manipulator and placed on the conveyor belt on the other side of the first stop plate. The workpiece is transported to a position between the first stop plate and the second stop plate by the conveyor belt. S33: grab the workpiece by the second manipulator and transport it to the jaws of the CNC double-head drilling machine to complete the processing of the cylindrical hole and the tapered hole of the anchor plate. After the processing is completed, grab the workpiece by the second manipulator to the specific tooling position of the strain hardening device; S34: Turn on the strain hardening device to apply a compressive stress of a set weight to the cone hole of the anchor plate, so that the cone hole of the anchor plate generates stress deformation, and the cone hole is finally formed.

3. The anchor plate strain and tempering dual strengthening processing method according to claim 1 is characterized in that: During the finishing process, a CNC lathe is used to perform preliminary finishing on the end face and outer circle of one side of the workpiece; after completion, the first robot re-grasps the partially processed workpiece and performs a 180-degree flip operation to perform finishing on the end face and outer circle of the other side of the workpiece.

4. The anchor plate strain and tempering dual strengthening processing method according to claim 1 is characterized in that: The step S1 and / or step S2 and / or step S3 are all controlled in linkage by an automatic control system.

5. An anchor plate strain and tempering dual strengthening automated production line according to any one of claims 1 to 4, characterized in that: The invention comprises a circular saw machine, a continuous heat treatment furnace, a CNC lathe, a CNC double-head drilling machine and a strain hardening device which are arranged in sequence. The CNC lathe, the CNC double-head drilling machine and the strain hardening device are connected through a conveyor belt, a first manipulator and a second manipulator.

6. The anchor plate strain and quenching and tempering dual strengthening automatic production line according to claim 5 is characterized in that: The conveyor belt is respectively provided with a first stop plate and a second stop plate for limiting the position of the workpiece, and the first stop plate and the second stop plate are located between the first manipulator and the second manipulator.

7. The anchor plate strain and quenching and tempering dual strengthening automatic production line according to claim 5 is characterized in that: The conveyor belt is divided into a first stage, a second stage and a third stage by a first stop plate and a second stop plate, wherein the first stage is the area between the initial end of the conveyor belt and the first stop plate, the second stage is the area between the first stop plate and the second stop plate, and the third stage is the area between the second stop plate and the rear end of the conveyor belt.

8. The anchor plate strain and quenching and tempering dual strengthening automatic production line according to claim 5 is characterized in that: The strain hardening device comprises a stamping tool and a positioning tool. The positioning tool is provided with a protruding block protruding upwards, and the stamping tool is provided with a replaceable product marking header.

Images