A gear hobbing machine for hydraulic power tongs

Abstract

The present application relates to gear cutting processing technical field, concretely for a kind of for hydraulic power pincers gear processing hobbing machine, including cabinet, cabinet is fixedly connected with second electric slide rail, second electric slide rail is installed with electric rotary plate by electric slide block thereon, electric rotary plate is slidably connected with sliding tool rest, sliding tool rest is fixedly connected with fixed frame and third electric slide rail, the electric slide block of third electric slide rail is fixedly connected with sliding frame, fixed frame and sliding frame are rotatably connected with mounting shaft, two the mounting shaft between installation has cylindrical cutter, fixed frame and sliding frame are provided with mounting bracket, and mounting bracket is installed with strip cutter.The present application is connected at the both ends of cylindrical cutter by strip cutter, replaces the end of cylindrical cutter to work, avoids the problem that traditional cutter end is difficult to dissipate heat in reciprocating tool jumping process, so that cutter can work at higher speed, overall improves the processing efficiency of cutter.

Description

Technical Field

[0001] This invention relates to the field of gear cutting technology, specifically a gear hobbing machine for machining hydraulically powered pliers gears. Background Technology

[0002] A gear hobbing machine is a device that produces gears using the meshing principle of gears and screws. The hobbing machine uses a rotating screw-shaped cutter to cut a rotating gear blank, gradually creating tooth grooves on the blank. It is commonly used to produce large gears (such as the large gear structures on hydraulic power clamps). During gear hobbing, the contact area between the cutting edge and the gear tooth surface varies at different positions of the cutter, resulting in different degrees of wear on different sections of the cutting edge. To balance the wear at different positions and extend the tool life, a tool shifting operation is usually required. This involves controlling the cutter to move intermittently or continuously along its rotation axis, allowing different cutting edges to participate in cutting sequentially, thus homogenizing the wear of the tool. Furthermore, the sequential operation of different cutting edges during the shifting process helps improve heat dissipation, enabling the tool to operate continuously at high speeds.

[0003] Currently, there are two common continuous cutting methods. One method involves the tool moving unidirectionally along its rotation axis to its travel limit, then moving away from the gear being machined, and then controlling the tool to move back to its original position along its rotation axis before continuing to machine the gear. The other method involves controlling the tool to move back and forth along its rotation axis while machining the gear. The first method results in discontinuous machining, low machining efficiency, and the need for tool resetting after resetting, affecting the accuracy of the machined gear. As for the second method, during the reciprocating movement of the tool, the cutting edges at both ends of the tool continuously participate in cutting for a significantly longer time than the cutting edges at the middle position. This leads to a greater heat dissipation load on the cutting edges at both ends, making it difficult to increase the cutting efficiency. If the cutting efficiency is directly increased, insufficient heat dissipation can easily lead to accelerated local wear of the tool, increasing the possibility of tool breakage. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing continuous cutting operation mode of gear hobbing machines, this invention proposes a gear hobbing machine for hydraulic power gear machining.

[0005] The technical solution of the present invention is: a gear hobbing machine for hydraulic power gear machining, comprising a cabinet, wherein a first electric slide rail and a second electric slide rail are fixedly connected to the cabinet; a rotary mounting table is mounted on the first electric slide rail via an electric slider; an electric rotating plate is mounted on the second electric slide rail via an electric slider; a sliding tool holder is slidably connected to the electric rotating plate; a fixed frame and a third electric slide rail are fixedly connected to the sliding tool holder; a sliding frame is fixedly connected to the electric slider on the third electric slide rail; both the fixed frame and the sliding frame are rotatably connected to mounting shafts; a cylindrical tool is mounted between the two mounting shafts; a conventional tool strip is fixedly connected to the cylindrical tool; mounting frames are provided on both the fixed frame and the sliding frame; a strip tool is mounted on the mounting frame; a drive motor for driving the adjacent mounting shafts to rotate is fixedly connected to the fixed frame; a tool-moving motor is fixedly connected to the electric rotating plate; the tool-moving motor drives the sliding tool holder to move via a gear and rack.

[0006] More preferably, the strip cutter includes a connecting frame, which is fixed to the side of the mounting frame near the mounting shaft. A first synchronous pulley is rotatably connected to the side of the connecting frame away from the mounting frame, and a second synchronous pulley is rotatably connected to the mounting frame. A synchronous cutter belt is wound around the first and second synchronous pulleys. The synchronous cutter belt is fixedly connected to equidistant fixed cutter strips. The distance between two adjacent cutting edges on the fixed cutter strips is the same as the distance between two adjacent cutting edges on a conventional cutter strip. A synchronous pulley is fixedly connected between the first synchronous pulley and the adjacent mounting shaft, and a synchronous belt is wound between two adjacent synchronous pulleys.

[0007] More preferably, the circumference of the outermost edge of the synchronous blade belt is X times the circumference of the outermost edge of the cylindrical blade, and the number of fixed blades on the synchronous blade belt is X times the number of conventional blades, where X is a positive integer greater than one.

[0008] More preferably, a pressure sensor for detecting the rotational pressure of adjacent mounting shafts is installed on the output shaft of the drive motor.

[0009] More preferably, the cabinet is fixedly connected to a cooling pipe, the lowest end of which is higher than the uppermost side of the strip-shaped cutter.

[0010] More preferably, the plane containing the axes of the first and second synchronous pulleys has an angle of less than 60° with the horizontal plane, and the first synchronous pulley is located on the side of the adjacent second synchronous pulley away from the rotary mounting platform.

[0011] More preferably, the fixed frame and the sliding frame are slidably connected to the adjacent mounting frame, a gap is provided between the mounting frame and the adjacent mounting shaft, and an adjusting motor is fixedly connected to both the fixed frame and the sliding frame. The output shaft of the adjusting motor is fixedly connected to a threaded rod, and the threaded rod is threadedly connected to the adjacent mounting frame.

[0012] More preferably, the electric rotating plate is fixedly connected to a fixed plate, the fixed plate is fixedly connected to a fourth electric slide rail, the electric slider on the fourth electric slide rail is fixedly connected to a sliding plate, the sliding plate is slidably connected to spaced sliding blocks, the sliding blocks are fixedly connected to a high-pressure nozzle, and the high-pressure nozzle cleans the adjacent conventional blades and the adjacent fixed blades by spraying high-pressure coolant.

[0013] More preferably, the extension line of the high-pressure nozzle's spray direction passes below the cylindrical cutter and does not contact the cylindrical cutter.

[0014] More preferably, all the sliding blocks are jointly equipped with a scissor-type telescopic frame, the scissor-type telescopic frame is slidably connected to the sliding plate, the sliding plate is rotatably connected to an adjusting bolt, the adjusting bolt is threadedly connected to the scissor-type telescopic frame, and the adjusting bolt can adjust the distance between two adjacent sliding blocks through the scissor-type telescopic frame.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] This invention uses a strip-shaped cutter connected to both ends of a cylindrical cutter to replace the end of the cylindrical cutter for operation. This avoids the problem of heat dissipation during the reciprocating cutting process of traditional cutter ends, thereby enabling the cutter to work at a higher speed and improving the overall machining efficiency of the cutter.

[0017] This invention, by adding an adjusting motor and a threaded rod, can adjust the working state of the strip cutter, enabling the device to cope with more different working conditions. During operation, the coolant sprayed from the cooling pipe passes through multiple fixed blades on the strip cutter simultaneously, improving the cooling efficiency of the coolant on the fixed blades.

[0018] This invention sprays high-pressure coolant through a high-pressure nozzle, which can directly impact the cutting edges of traditional and fixed cutting tools used for gear cutting. This reduces the probability of metal debris adhering to the traditional and fixed cutting tools and provides auxiliary cooling to the cutting edges. Furthermore, by precisely positioning the high-pressure nozzle, the amount of coolant required can be reduced, thereby reducing the burden on the cooling circulation system. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the first and second electric slide rails of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the electric rotating plate and sliding tool holder of the present invention;

[0022] Figure 4 This is an exploded view of the cylindrical cutting tool and the strip cutting tool of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the mounting bracket and strip-shaped cutter of the present invention;

[0024] Figure 6 This is an exploded view of the strip-shaped cutting tool of the present invention;

[0025] Figure 7 This is an exploded view of the first and second synchronous pulleys of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the fixing plate and the fourth electric slide rail of the present invention;

[0027] Figure 9 This is a schematic diagram showing the spray direction of the high-pressure nozzle of the present invention;

[0028] Figure 10 This is a three-dimensional structural diagram of the scissor-type telescopic frame and adjusting bolts of the present invention.

[0029] In the attached diagram, the following are the reference numerals: 1. Cabinet; 1001. Cooling pipe; 2. First electric slide rail; 3. Second electric slide rail; 4. Rotary mounting platform; 5. Electric rotating plate; 6. Sliding tool holder; 7. Fixed frame; 8. Third electric slide rail; 9. Sliding frame; 10. Mounting shaft; 101. Drive motor; 102. Tool tracing motor; 11. Cylindrical tool; 111. Traditional tool bar; 12. Mounting frame; 13. Strip tool; 131. Connecting frame; 132. First synchronous pulley; 133. Second synchronous pulley; 134. Synchronous tool belt; 135. Fixed tool bar; 14. Synchronous pulley; 17. Adjusting motor; 18. Threaded rod; 19. Fixed plate; 20. Fourth electric slide rail; 21. Sliding plate; 22. Sliding block; 23. High-pressure nozzle; 24. Scissor-type telescopic frame; 25. Adjusting bolt. Detailed Implementation

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0031] Example 1

[0032] Reference Figures 1-5 A gear hobbing machine for hydraulically powered gear cutting includes a cabinet 1. The cabinet 1 is fixedly connected to a first electric slide rail 2, a second electric slide rail 3, a cooling pipe 1001, and a control terminal. Both the first and second electric slide rails 2 and 3 are electrically connected to the control terminal. The cooling pipe 1001 is located above the second electric slide rail 3 and is connected to a cooling circulation system. A rotary mounting table 4 is mounted on the first electric slide rail 2 via an electric slider. This rotary mounting table 4 is an existing device used to mount the gear to be processed and drive the gear to rotate. An electric rotating plate 5 (specifically, an electric rotating plate 5 is a horizontal plate with an electric rotating shaft mounted on the electric slider of the second electric slide rail 3, which drives the horizontal plate of the electric rotating plate 5 to rotate) is mounted on the second electric slide rail 3 via an electric slider. Electrically connected to the control terminal, the left side of the electric rotating plate 5 is provided with a slide rail. The electric rotating plate 5 is slidably connected to a sliding tool holder 6 through the slide rail. The sliding tool holder 6 is fixedly connected to a fixed frame 7 and a third electric slide rail 8. The third electric slide rail 8 is electrically connected to the control terminal. The electric slider on the third electric slide rail 8 is fixedly connected to a sliding frame 9. Both the fixed frame 7 and the sliding frame 9 are rotatably connected to mounting shafts 10. The two mounting shafts 10 are symmetrically distributed and share a keyway. The two mounting shafts 10 are jointly mounted with a cylindrical cutter 11 through the keyway. The cylindrical cutter 11 connects the two mounting shafts 10 together, so that the two mounting shafts 10 rotate together. The cylindrical cutter 11 is fixedly connected to a circumferentially evenly distributed traditional cutter bars 111. The traditional cutter bars 111 are provided with spaced-distributed cutting edges. The cutting edges of all the traditional cutter bars 111 on the cylindrical cutter 11 are distributed along the same spiral line.

[0033] Both the fixed frame 7 and the sliding frame 9 are equipped with mounting brackets 12. Two strip cutters 13 are mounted on the mounting brackets 12, located at opposite ends of the cylindrical cutter 11. A drive motor 101 is fixedly connected to the fixed frame 7 and electrically connected to a control terminal. A pressure sensor (a piezoelectric sensor, not shown in the figure) is mounted on the output shaft of the drive motor 101 to detect the rotational pressure of adjacent mounting shafts 10. The pressure sensor detects the cutting pressure of the cylindrical cutter 11 and the strip cutter 13 on the gear, thus allowing the operator to adjust the cutting pressure of the cylindrical cutter 11 and the strip cutter 13. The cutting speed of the tool 13 provides a basis (the operator can slow down the cutting speed when the blade wear is low and speed up the cutting speed when the blade wear is high, so that the wear of the cylindrical tool 11 and the strip tool 13 is more uniform). The drive motor 101 is used to drive the adjacent mounting shaft 10 to rotate. The electric rotating plate 5 is fixedly connected to the cutting speed motor 102. The cutting speed motor 102 is electrically connected to the control terminal. The cutting speed motor 102 drives the sliding tool holder 6 to slide back and forth along the electric rotating plate 5 through the gear and rack, thereby controlling the cylindrical tool 11 and the two strip tools 13 to complete the cutting speed process.

[0034] In the above scheme, the cylindrical cutter 11 and the traditional cutter bar 111 are basically the same as the existing cutters, except that the installation method is changed to be installed by two mounting shafts 10. By connecting the two ends of the cylindrical cutter 11 with the strip cutter 13, the cutting edge at both ends of the traditional cutter bar 111 on the cylindrical cutter 11 is replaced to work, avoiding the problem of large heat dissipation load of the cutting edge at both ends of the traditional cutter during the reciprocating cutting process, thereby ensuring that the cutter can cut at a higher speed and improving the overall processing efficiency. The outlet of the cooling pipe 1001 is located on the left vertical surface of the synchronous cutter belt 134, and the outlet of the cooling pipe 1001 is always located directly above the contact position between the gear and the cylindrical cutter 11 and the strip cutter 13, so that the coolant sprayed from the cooling pipe 1001 can flush the debris at the cutting position of the gear from top to bottom, and cool the gear, the cylindrical cutter 11 and the strip cutter 13 as a whole. Through the modular design of the cylindrical cutter 11 and the strip cutter 13, the module that has broken can be repaired and replaced separately, reducing the maintenance burden.

[0035] A further preferred option is to refer to Figures 5-7The strip-shaped cutter 13 includes a connecting frame 131, which is fixed to the left side of the mounting frame 12. A first synchronous wheel 132 is rotatably connected to the upper side of the connecting frame 131, and a second synchronous wheel 133 is rotatably connected to the mounting frame 12. The first synchronous wheel 132 and the second synchronous wheel 133 are together wound around a synchronous cutter belt 134. The synchronous cutter belt 134 is fixedly connected to fixed cutter strips 135 that are evenly distributed. The distance between two adjacent cutting edges on the fixed cutter strip 135 is the same as the distance between two adjacent cutting edges on the conventional cutter strip 111. The cutting edge on the fixed cutter strip 135 located below the second synchronous wheel 133 is on the same spiral line as the cutting edges of all the conventional cutter strips 111 on the cylindrical cutter 11.

[0036] Synchronous pulleys 14 are fixedly connected between the first synchronous pulley 132 and the adjacent mounting shaft 10. A synchronous belt is wound between two adjacent synchronous pulleys 14. A tensioning pulley is installed on the upper side of the connecting frame 131 to ensure that the synchronous belt on the synchronous pulley 14 is tensioned. The synchronous pulley 14 and the synchronous belt on it jointly control the first synchronous pulley 132 and the second synchronous pulley 133 to rotate at the same rotation speed as the mounting shaft 10. The outermost circumference of the synchronous cutter belt 134 is X times the outermost circumference of the cylindrical cutter 11. The number of fixed cutter bars 135 on the synchronous cutter belt 134 is X times the number of traditional cutter bars 111, where X is a positive integer greater than one. This is used to ensure that the gear parts at the same height are cut during the synchronous rotation of the synchronous cutter belt 134 and the cylindrical cutter 11. The cutting edge on the fixed cutter bar 135 is always located on the same spiral line as the cutting edge on the traditional cutter bar 111.

[0037] The lowest point of the cooling pipe 1001 is higher than the uppermost side of the strip cutter 13. During the tool shifting process, the cooling pipe 1001 will not come into contact with the fixed tool bar 135 and its cutting edges. When the synchronous tool belt 134 is working, the coolant sprayed from the cooling pipe 1001 passes through the right side of the synchronous tool belt 134 (e.g., ...). Figure 3 The fixed blade 135 and the blade (shown) are used to cool the blade on the fixed blade 135.

[0038] The plane containing the axis of the first synchronous pulley 132 and the axis of the second synchronous pulley 133 is at an angle of less than 60° to the horizontal plane, and the first synchronous pulley 132 is located to the right of the adjacent second synchronous pulley 133, so that the synchronous blade belt 134 is in a state of gradually tilting to the right from bottom to top.

[0039] In the above scheme, the winding method of the first synchronous pulley 132, the second synchronous pulley 133, and the synchronous blade belt 134 is the same as that of the synchronous pulley 14 and the synchronous belt. The synchronous blade belt 134 is a flexible metal belt, and the cutting edge on the fixed blade 135 is the same as that on the conventional blade 111. Since the circumference of the synchronous blade belt 134 is greater than the outer diameter circumference of the cylindrical cutter 11, the working time interval of the fixed blade 135 on the synchronous blade belt 134 is greater than the working time interval of the conventional blade 111, thereby increasing the cooling window of the cutting edge on the fixed blade 135. At the same time, by making the synchronous blade belt 134 gradually tilt to the right from bottom to top, the coolant sprayed from the cooling pipe 1001 can pass through more fixed blades 135 in sequence. Without increasing the coolant flow rate, the time for the fixed blade 135 to be flushed by the coolant is increased, improving the cooling efficiency of the fixed blade 135, and further reducing the possibility of localized accelerated wear and blade breakage of the fixed blade 135 due to high temperature.

[0040] The working principle of the above scheme is as follows:

[0041] The operator controls the third electric slide rail 8 via a control terminal, causing the electric slider on the third electric slide rail 8 to move the sliding frame 9 and its components forward, separating the two mounting shafts 10. The operator then inserts the cylindrical cutter 11 into the rear mounting shaft 10. Subsequently, the operator controls the electric slider on the third electric slide rail 8 to reset via the control terminal. The electric slider on the third electric slide rail 8 then moves the sliding frame 9 and the front mounting shaft 10 backward to reset. The two mounting shafts 10 together clamp the cylindrical cutter 11 through the keyway. The operator then mounts the gear to be processed onto the rotary mounting table 4, ready to cut the gear.

[0042] When cutting the gear to be machined, the cutting program is started via the control terminal. The control terminal controls the electric slider on the first electric slide rail 2 to move the rotary mounting table 4 and the gear to the right until the gear to be machined is below the cylindrical cutter 11 and the strip cutter 13. Then, the control terminal starts the drive motor 101 and the rotary mounting table 4, and controls the cooling circulation system to supply liquid to the cooling pipe 1001. The cooling pipe 1001 sprays coolant onto the edge of the gear to cool the cylindrical cutter 11, the strip cutter 13 and the gear. The drive motor 101 drives the two mounting shafts 10 and the cylindrical cutter 11 to rotate counterclockwise (from a front to back view). The mounting shafts 10 drive the first synchronous pulley 1 through two adjacent synchronous pulleys 14. The first synchronous wheel 132 and the second synchronous wheel 133 rotate synchronously. The first synchronous wheel 132 and the second synchronous wheel 133 together drive the synchronous blade belt 134 and the fixed blade strip 135 to rotate circumferentially. At this time, the rotation speed of the first synchronous wheel 132 is equal to the rotation speed of the cylindrical cutter 11. Therefore, the fixed blade strip 135 located at the lower part of the synchronous blade belt 134 is aligned with the adjacent conventional blade strip 111. The rotating mounting platform 4 drives the gear to rotate at the speed of meshing with the blade of the conventional blade strip 111 on the cylindrical cutter 11. The control terminal controls the electric slider on the second electric slide rail 3 to drive the electric rotating plate 5, the sliding tool holder 6 and its components to move slowly downward together, so that the cylindrical cutter 11 and the strip cutter 13 move slowly downward to cut the gear.

[0043] During the cutting of the gear by the cylindrical cutter 11 and the strip cutter 13, the control terminal synchronously controls the cutting motor 102 to work, so that the cutting motor 102 drives the sliding tool holder 6 to move back and forth through the gear rack to perform the reciprocating cutting operation. During the reciprocating cutting operation, the control terminal adjusts the speed of the rotation of the gear driven by the rotating mounting table 4 in real time, so that the gear always maintains a meshing state with the cutting edge of the moving cylindrical cutter 11.

[0044] When the sliding tool holder 6 approaches the end of its one-way stroke during movement (i.e., approaches the end of its stroke on both its front and rear sides), taking the sliding tool holder 6 moving forward to approach the end of its stroke as an example:

[0045] The rear strip cutter 13 gradually moves to the cutting position of the gear. At this time, the cutting edge on the fixed blade 135 at the lower part of the strip cutter 13 gradually replaces the cutting edge on the adjacent conventional blade 111 and cuts the gear. As the strip cutter 13 moves to the lower side of the cooling pipe 1001, the cooling pipe 1001 sprays coolant to cool the fixed blade 135 on the left side of the strip cutter 13 and the cutting edge as a whole. When the sliding tool holder 6 moves forward to the end of its stroke, the control terminal synchronously controls the tracing motor 102 to rotate in the opposite direction, so that the sliding tool holder 6 drives the cylindrical cutter 11 and the strip cutter 13 to move backward and reset. The cutting edge of the conventional blade 111 gradually replaces the cutting edge on the fixed blade 135 at the lower part of the rear strip cutter 13 and cuts the gear. The control terminal controls the tracing motor 102 to drive the sliding tool holder 6, the cylindrical cutter 11 and the strip cutter 13 to move back and forth until the gear is completely cut and shaped.

[0046] When machining helical gears, the operator only needs to control the electric rotating plate 5 to rotate its components to a certain angle (this angle is manually set according to the inclination angle of the tooth groove on the gear being machined), so that the conventional cutter bar 111 and the fixed cutter bar 135 cut the gear along the inclined path. When the cutter moves during the cutting of the helical gear, the control terminal needs to control the electric slider on the second electric slide rail 3 to drive the electric rotating plate 5 and its components to move synchronously in height adjustment during the cutter movement. This is to keep the cutting position of the conventional cutter bar 111 and the fixed cutter bar 135 on the gear at the corresponding height, and not move up or down relative to the gear being cut due to the movement of the sliding cutter holder 6.

[0047] After the gear is completely cut and shaped, the drive motor 101 and the traverse tool motor 102 are turned off by the control terminal, so that the cooling circulation system stops supplying liquid to the cooling pipe 1001. The electric slider on the first electric slide rail 2 is controlled to drive the rotating mounting table 4 and the gear to move to the left to reset. The second electric slide rail 3 and its electric slider drive the electric rotating plate 5, the sliding tool holder 6 and its components to move upward together to reset. Then the workers remove the processed gear and proceed to process the next gear.

[0048] In this embodiment, the fixed frame 7 and the sliding frame 9 are both considered to be fixedly connected to the adjacent mounting frame 12, and the mounting frame 12 and the adjacent mounting shaft 10 can be considered to be rotatably connected.

[0049] Example 2

[0050] Based on Embodiment 1, this device also has the function of adjusting the position of the strip cutter 13.

[0051] A further preferred option is to refer to Figure 4 , Figure 6 and Figure 7The fixed frame 7 and the sliding frame 9 are slidably connected to the adjacent mounting frame 12. There is a gap between the mounting frame 12 and the adjacent mounting shaft 10. The fixed frame 7 and the sliding frame 9 are both fixedly connected to the adjusting motor 17. The adjusting motor 17 is electrically connected to the control terminal. The output shaft of the adjusting motor 17 is fixedly connected to the threaded rod 18. The threaded rod 18 is threadedly connected to the adjacent mounting frame 12. In this way, the position of the mounting frame 12 and its components can be adjusted, and the stability of the mounting frame 12 against external forces can be increased through the threaded structure.

[0052] In the above solution, by adding an adjusting motor 17 and a threaded rod 18, the function of adjusting the working state of the strip cutter 13 is added, enabling the device to cope with more working conditions.

[0053] The working principle of the above scheme is as follows:

[0054] When cutting gears, because the wear rate of the traditional blade 111 on the cylindrical cutter 11 is different from that of the fixed blade 135 on the strip cutter 13, in order to ensure the smooth connection between the blades of the traditional blade 111 and the fixed blade 135, the control terminal reads the change in cutting resistance from the pressure sensor on the output shaft of the drive motor 101 during the cutting process. By comparing the difference between the cutting resistance of the cylindrical cutter 11 and the cutting resistance of the strip cutter 13, the control terminal starts the adjusting motor 17 in a timely manner, so that the threaded rod 18 on the adjusting motor 17 drives the adjacent mounting bracket 12 to retract to the right until the cutting resistance on the cylindrical cutter 11 and the cutting resistance on the strip cutter 13 are equal. The control terminal then shuts off the adjusting motor 17. After the operator replaces the cylindrical cutter 11, the operator controls the adjusting motor 17 to rotate and drive the adjacent mounting bracket 12 to move to the left to reset (or moves the mounting bracket 12 to the right a certain distance to ensure that the cutting resistance on the cylindrical cutter 11 and the cutting resistance on the strip cutter 13 are equal).

[0055] Example 3

[0056] Based on Embodiment 2, this device also has the function of further cleaning and cooling the blades on the conventional blade 111 and the blades on the fixed blade 135.

[0057] A further preferred option is to refer to Figures 8-10A fixed plate 19 is fixedly connected to the lower side of the electric rotating plate 5. The fixed plate 19 is located below the sliding tool holder 6. A fourth electric slide rail 20 is fixedly connected to the fixed plate 19. The fourth electric slide rail 20 is electrically connected to the control terminal. A sliding plate 21 is fixedly connected to the electric slider on the fourth electric slide rail 20. A sliding block 22 with front and rear intervals is slidably connected to the sliding plate 21. A high-pressure nozzle 23 is fixedly connected to the sliding block 22. The high-pressure nozzle 23 is connected to the cooling circulation system. The extension line of the spray direction of the high-pressure nozzle 23 passes below the cylindrical tool 11 and does not contact the cylindrical tool 11. It only sprays the blades on the conventional tool bar 111 and the fixed tool bar 135. The high-pressure nozzle 23 cleans the adjacent conventional tool bar 111 and the adjacent fixed tool bar 135 by spraying high-pressure coolant.

[0058] In the above scheme, the high-pressure nozzle 23 sprays high-pressure coolant, which can directly impact the cutting edge of the conventional blade 111 and the fixed blade 135 at the position where they directly cut the gear, thereby reducing the probability of metal debris adhering to the conventional blade 111 and the fixed blade 135. At the same time, the high-pressure coolant quickly passes over the side of the cutting edge of the conventional blade 111 and the side of the cutting edge of the fixed blade 135, effectively assisting in cooling the cutting edge of the conventional blade 111 and the fixed blade 135 (mainly to increase the cooling efficiency of the cutting edge of the conventional blade 111). Moreover, because the spray target is clear, a large amount of coolant is not required to complete the cleaning and auxiliary cooling work.

[0059] A further preferred option is to refer to Figure 10 All sliding blocks 22 are equipped with a scissor-type telescopic frame 24. The scissor-type telescopic frame 24 is slidably connected to the sliding plate 21. The sliding plate 21 is rotatably connected to an adjusting bolt 25. The adjusting bolt 25 is threadedly connected to the scissor-type telescopic frame 24. The adjusting bolt 25 is used to adjust the distance between two adjacent sliding blocks 22.

[0060] In the above scheme, by rotating the adjusting bolt 25, the state of the scissor-type telescopic frame 24 is adjusted, thereby adjusting the distance between two adjacent sliding blocks 22. The distance between multiple sliding blocks 22 can be adjusted according to the distance between two adjacent blades on the traditional blade bar 111 (i.e., the pitch of the thread formed by the blades on all the traditional blade bars 111 on the cylindrical cutter 11), thereby adapting to more cylindrical cutters 11 of different specifications.

[0061] The working principle of the above scheme is as follows:

[0062] Before starting to process the gear, adjust the adjusting bolt 25 according to the distance between two adjacent cutting edges on the traditional cutter bar 111, so that the scissor-type telescopic frame 24 drives multiple sliding blocks 22 to move until the distance between two adjacent sliding blocks 22 is equal to the distance between two adjacent cutting edges on the traditional cutter bar 111.

[0063] When the cooling circulation system is started to supply liquid to the cooling pipe 1001, the cooling circulation system is controlled to continuously supply high-pressure coolant to all high-pressure nozzles 23. The high-pressure coolant sprayed from the high-pressure nozzles 23 directly impacts the cutting edges on the adjacent conventional blades 111 or the adjacent fixed blades 135. At the same time, the control terminal combines the rotational speed of the cylindrical cutter 11 driven by the mounting shaft 10 and the reciprocating speed of the sliding blade holder 6 driven by the tracing motor 102 to calculate the position of the cutting edge on the conventional blade 111 below the cylindrical cutter 11 and the position of the cutting edge on the fixed blade 135 below the strip cutter 13 (i.e., the position of the cutting edge in the spray direction of the high-pressure nozzles 23). This causes the fourth electric slide rail 20 to drive the sliding plate 21 and all the sliding blocks 22 to move back and forth through the electric slider on it, so that the coolant sprayed from the high-pressure nozzles 23 directly washes and cools the cutting edges on the conventional blades 111 and the fixed blades 135, thereby improving the washing efficiency.

[0064] When the staff controls the cooling circulation system to stop supplying liquid to the cooling pipe 1001, the cooling circulation system simultaneously stops supplying high-pressure coolant to all high-pressure nozzles 23.

[0065] The above are merely embodiments of the present invention and are not intended to limit the invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A gear hobbing machine for hydraulic power gear cutting, comprising a cabinet (1), wherein the cabinet (1) is fixedly connected to a first electric slide rail (2) and a second electric slide rail (3), wherein a rotary mounting table (4) is mounted on the first electric slide rail (2) via an electric slider, and an electric rotating plate (5) is mounted on the second electric slide rail (3) via an electric slider, wherein a sliding tool holder (6) is slidably connected to the electric rotating plate (5), wherein a fixed frame (7) and a third electric slide rail (8) are fixedly connected to the sliding tool holder (6), wherein a sliding frame (9) is fixedly connected to the electric slider on the third electric slide rail (8), and both the fixed frame (7) and the sliding frame (9) are rotatably connected to a mounting shaft (10), characterized in that: Also include the cylindrical cutter (11), the cylindrical cutter (11) is installed between two said mounting shaft (10), the cylindrical cutter (11) is fixed with the traditional blade (111) that is uniformly distributed in circumference, the fixed frame (7) and the sliding frame (9) are provided with mounting frame (12), the mounting frame (12) is installed with the strip cutter (13), the fixed frame (7) is fixed with the drive motor (101) for driving adjacent said mounting shaft (10) rotation, the electric rotating plate (5) is fixed with the tool shifting motor (102), the tool shifting motor (102) moves the sliding tool holder (6) through the gear rack.

2. A gear hobbing machine for machining the gear of a hydraulic power tong according to claim 1, characterized in that: The strip cutter (13) includes a connecting frame (131), the connecting frame (131) is fixed to the mounting frame (12) near one side of the mounting shaft (10), the connecting frame (131) is rotatably connected with the first synchronous wheel (132) away from one side of the mounting frame (12), the mounting frame (12) is rotatably connected with the second synchronous wheel (133), the first synchronous wheel (132) and the second synchronous wheel (133) are commonly provided with synchronous knife belt (134), the synchronous knife belt (134) is fixed with equidistantly distributed fixed blade (135), the distance between adjacent two blades on the fixed blade (135) is the same as the distance between adjacent two blades on the traditional blade (111), the first synchronous wheel (132) and adjacent the mounting shaft (10) are fixed with synchronous pulley (14), and the synchronous pulley (14) is provided between adjacent two synchronous pulleys (14).

3. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 2, characterized in that: The outermost circumference of the synchronous knife belt (134) is X times the outermost circumference of the cylindrical cutter (11), the number of the fixed blade (135) on the synchronous knife belt (134) is X times the number of the traditional blade (111), and X is a positive integer greater than one.

4. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 1, characterized in that: The output shaft of the drive motor (101) is provided with a pressure sensor for detecting the rotation pressure of adjacent mounting shaft (10).

5. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 2, characterized in that: The cabinet (1) is fixed with a cooling pipe (1001), and the lowest end of the cooling pipe (1001) is higher than the uppermost side of the strip cutter (13).

6. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 2, characterized in that: The angle between the plane where the axis of the first synchronous wheel (132) and the axis of the second synchronous wheel (133) are located and the horizontal plane is less than 60°, and the first synchronous wheel (132) is located on the side away from the rotating mounting table (4) of adjacent second synchronous wheel (133).

7. A gear hobbing machine for the gear machining of hydraulic power tongs according to claim 6, characterized in that: The fixed frame (7) and the sliding frame (9) are respectively slidably connected with adjacent mounting frame (12), and a gap is arranged between the mounting frame (12) and adjacent mounting shaft (10). The fixed frame (7) and the sliding frame (9) are fixed with an adjusting motor (17), the output shaft of the adjusting motor (17) is fixed with a threaded rod (18), and the threaded rod (18) is threadedly connected with adjacent mounting frame (12).

8. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 2, characterized in that: The electric rotating plate (5) is fixedly connected with a fixed plate (19), the fixed plate (19) is fixedly connected with a fourth electric sliding rail (20), an electric sliding block on the fourth electric sliding rail (20) is fixedly connected with a sliding plate (21), the sliding plate (21) is slidably connected with a plurality of sliding blocks (22) which are spaced apart, the sliding blocks (22) are fixedly connected with high-pressure nozzles (23), and the high-pressure nozzles (23) clean adjacent traditional knife strips (111) and adjacent fixed knife strips (135) by spraying high-pressure cooling liquid.

9. A gear hobbing machine for the gear machining of hydraulic power tongs according to claim 8, characterized in that: The extension line of the spraying direction of the high-pressure nozzles (23) passes below the cylindrical cutter (11) and does not contact the cylindrical cutter (11).

10. A gear hobbing machine for gear machining of hydraulic power tongs according to claim 8, characterized in that: All the sliding blocks (22) are commonly provided with a scissor-type telescopic frame (24), the scissor-type telescopic frame (24) is slidably connected with the sliding plate (21), the sliding plate (21) is rotatably connected with an adjusting bolt (25), the adjusting bolt (25) is threadedly connected with the scissor-type telescopic frame (24), and the adjusting bolt (25) can adjust the spacing between two adjacent sliding blocks (22) through the scissor-type telescopic frame (24).

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