Machining device and technological method for shaft hole of flow-regulating and pressure-regulating valve

Abstract

The invention relates to the technical field of deep and long hole machining equipment, solves the problems that in the prior art, the deep and long hole machining efficiency is not high, and stability is insufficient, and discloses a machining device and process method for a flow and pressure regulating valve shaft hole, and the machining device comprises a guide rod, a front supporting frame and at least one rear supporting frame; a cutter handle connected with driving equipment is arranged at one end of the guide rod; a blade for cutting is arranged at the other end; the front support frame is fixedly connected in the shaft hole and is close to the cutter handle; the guide rod penetrates through the front supporting frame and rotates relative to the front supporting frame. At least one rear support frame is arranged; the rear supporting frame is fixedly connected into the shaft hole and located between the front supporting frame and the cutter. The guide rod penetrates through the rear supporting frame and rotates relative to the front supporting frame. Stable rotation of the guide rod in the cutting process can be guaranteed, meanwhile, the cutting precision and stability are improved through the fixing effect of the front supporting frame and the rear supporting frame, and the device is suitable for precise machining of flow and pressure adjusting valve shaft holes.

Description

Technical Field

[0001] The present application relates to the technical field of deep and long hole processing equipment, and in particular to a processing device and a process method for a shaft hole of a flow regulating and pressure regulating valve. Background Art

[0002] In the field of mechanical processing, the processing of long and deep holes is a common problem. Traditional processing methods usually rely on a single tool and a simple support system, which is inadequate when faced with complex geometries and high-strength materials. With the continuous development of industrial production, the requirements for processing accuracy and production efficiency are getting higher and higher. The existing long and deep hole processing technology has gradually exposed many shortcomings, limiting the progress of the high-end manufacturing industry.

[0003] The traditional method is to use a single diameter drill to process long and deep holes. This method is prone to vibration and runout due to the long tool length and poor rigidity, which affects the processing accuracy and surface quality.

[0004] In order to improve the processing accuracy, the prior art also adopts a multiple clamping method. The processing of long and deep holes is gradually completed by replacing the tool and adjusting the positioning reference multiple times. Although this method can improve the accuracy, the frequent clamping and positioning leads to low production efficiency and increased production costs.

[0005] In order to reduce the vibration of the tool, some companies have introduced a support frame to assist the stability of the tool. However, the strength and hardness of the support frame are relatively high, and long-term contact will cause damage to the workpiece surface and even cause cracks and other problems. Summary of the invention

[0006] In order to improve the defects of low efficiency and insufficient stability in the prior art for deep and long hole processing, the present application provides a processing device and a process method for a flow regulating and pressure regulating valve shaft hole.

[0007] The following technical solutions are adopted: First, The present application provides a processing device for the shaft hole of a flow regulating and pressure regulating valve, comprising a guide rod, a front support frame and at least one rear support frame; one end of the guide rod is provided with a tool handle for connecting a driving device; the other end is provided with a blade for cutting; the front support frame is fixed in the shaft hole and is close to the tool handle; the guide rod passes through the front support frame, and the guide rod and the front support frame rotate relative to each other; the rear support frame is provided with at least one; the rear support frame is fixed in the shaft hole and is located between the front support frame and the tool; the guide rod passes through the rear support frame, and the guide rod and the front support frame rotate relative to each other.

[0008] By adopting the above technical solution, the guide rod connects the driving device and the blade, and the guide rod passes through the front support frame and the rear support frame and can rotate relatively. The driving device drives the guide rod and the blade to rotate through the tool handle to achieve cutting processing of the shaft hole. The stable rotation of the guide rod during the cutting process is ensured, and the fixing effect of the front and rear support frames improves the cutting accuracy and stability, which is suitable for the precision processing of the shaft hole of the flow and pressure regulating valve.

[0009] Optionally, a through hole is formed on the front support frame; a nozzle is provided in the through hole, and the nozzle is provided with a hose connected to a coolant supply device.

[0010] By adopting the above technical solution, the nozzle is connected to the coolant supply device through a hose to realize the coolant supply during the cutting process. The coolant is supplied to the cutting area through the nozzle, which effectively reduces the cutting temperature and tool wear, and improves the processing efficiency and tool life.

[0011] Optionally, the through hole is provided with an internal thread, and the nozzle is threadedly connected to the front support frame via the internal thread.

[0012] By adopting the above technical solution, the internal thread connection is convenient for installation and disassembly, which simplifies the replacement and maintenance process of the nozzle and improves the flexibility and ease of use of the processing device.

[0013] Optionally, the front support frame and the rear support frame separate an injection cavity in the axial hole; the guide rod is provided with an injection hole along the axis, the guide rod surface is provided with an immersion hole located in the injection cavity, and the guide rod is provided with a liquid outlet hole on the outer wall of one end of the tool; the immersion hole is connected to the injection hole, and the injection hole is connected to the liquid outlet hole.

[0014] By adopting the above technical solution, the front and rear support frames separate the injection cavity in the shaft hole, and the injection hole, immersion hole and outlet hole on the guide rod constitute a coolant circulation path. The coolant enters from the injection hole, penetrates into the cutting area through the immersion hole, and finally is discharged from the outlet hole. This ensures that the cutting area is fully supplied with coolant, further improves the cutting efficiency and tool life, and reduces the influence of heat and debris generated during the cutting process on the processing quality.

[0015] Optionally, the diameter of the liquid outlet hole is larger than that of the liquid injection hole, and the diameter of the liquid injection hole is larger than that of the leaching hole.

[0016] By adopting the above technical solution, the diameter of the liquid outlet hole is larger than the liquid injection hole, and the diameter of the liquid injection hole is larger than the leaching hole, forming a cooling liquid channel that is gradually enlarged, ensuring that impurities entering from the leaching hole can flow out from the liquid outlet hole to avoid blockage.

[0017] Optionally, a hollow water collection cover is coaxially arranged on the rear support frame; the water collection cover is connected to a side of the rear support frame facing the front support frame.

[0018] By adopting the above technical solution, the coolant is collected by the water collection cover and guided to flow into the immersion hole.

[0019] Optionally, the water collection cover is detachably connected to the rear support frame via bolts.

[0020] By adopting the above technical solution, the water collection cover and the rear support frame are detachably connected by bolts, which is convenient for cleaning and replacement.

[0021] Optionally, the front support frame and the rear support frame are both made of engineering plastics.

[0022] By adopting the above technical solution, the strength and hardness of the engineering plastic are both lower than those of the workpiece to be processed, which meets the requirements for the rigidity and toughness of the support frame during processing and ensures that no secondary damage is caused to the workpiece, especially when the chip force is transmitted during the processing.

[0023] Second, The present application provides a method, including step 1, processing a shallow axial hole in the workpiece to be processed, and withdrawing the guide rod and the tool; step 2, sequentially and spaced apart installing the rear support frame and the front support frame on the guide rod, and setting the tool; step 3, inserting the front support frame, the rear support frame and the guide rod into the axial hole; step 4, interference fitting the front support frame, the rear support frame and the axial hole; step 5, transmitting the power source torque to the guide rod through the tool holder to rotate it to process the deep axial hole.

[0024] Optionally, in step five, coolant is supplied through the nozzle arranged on the front support frame.

[0025] In summary, the present application includes at least one of the following beneficial effects: 1. By optimizing the cutting device and coolant supply system, the stability and accuracy of the cutting process are ensured, while the cutting temperature and tool wear are reduced, and the processing efficiency and tool life are improved.

[0026] 2. The threaded connection between the nozzle and the front support frame, and the detachable connection between the water hood and the rear support frame simplify the maintenance process of the processing device and improve its flexibility and ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the structure of the first embodiment when it is in the workpiece to be processed; Figure 2 is a schematic diagram of the overall structure of the first embodiment; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at point A; Figure 4 yes Figure 2 A schematic diagram of the enlarged structure at B; Figure 5 yes Figure 2 Enlarged structural diagram at C.

[0028] Explanation of the reference numerals: 1. workpiece to be processed; 11. shallow hole; 12. injection cavity; 13. deep and long hole; 2. guide rod; 21. tool handle; 22. tool; 23. injection hole; 24. immersion hole; 25. liquid outlet hole; 3. front support frame; 31. through hole; 32. baffle; 4. rear support frame; 41. water collection cover; 411. inner connecting plate; 5. joint; 51. hose. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 To Attachment Figure 5 This application is described in further detail.

[0030] To solve the problem of low flexibility of conventional tools. Insufficient tool rigidity during long hole processing, vibration or jump of long guide rod processing, resulting in low processing accuracy and insufficient production efficiency. To solve the problem of multiple clamping and different positioning benchmarks leading to time waste. To solve the problem of damage to the workpiece during in-depth processing due to the excessive strength and hardness of the support frame.

[0031] Embodiment 1: Reference Figure 1 and Figure 2, the embodiment of the present application discloses a processing device for the shaft hole of a flow regulating and pressure regulating valve, which includes a guide rod 2, a front support frame 3 and at least one rear support frame 4. For the convenience of expression, the shaft hole processing of the workpiece 1 to be processed is divided into two sections according to depth: a shallow hole 11 and a deep long hole 13. Specifically, the guide rod 2 is a circular long rod structure, the diameter of the guide rod 2 is smaller than the inner diameter of the hole to be processed, and the length is greater than the sum of the depths of the shallow hole 11 and the deep long hole 13 to be opened. A tool handle 21 is provided at one end of the guide rod 2, and this end is defined as the rear end, and the other end is the front section, and a tool 22 is provided at the front section. The tool handle 21 is used to connect a power source to drive the guide rod 2 to rotate. The tool handle 21 is a prior art, and can be selected from spring chucks, Morse taper shank tool holders, side locking tool handles 21, etc. The power source is universal, and it belongs to the prior art and will not be repeated here. The tool 22 uses a CNC tool bar inner hole screw type tool 22. In this embodiment, the model is S16Q-MWLNRR08. In other embodiments, the size can be adaptively adjusted. First, the shallow hole 11 is processed on the workpiece 1 to be processed. Then the rear support frame 4 and the front support frame 3 are placed in sequence, and the rear support frame 4 and the front support frame 3 are made to have an interference fit with the shallow hole 11. Among them, at least one rear support frame 4 is provided. In other possible embodiments, the rear support frame 4 can be provided with a number greater than one to further improve the stability of the guide rod 2 during rotation. Furthermore, the front support frame 3 is a circular block structure, and the diameter of the front support frame 3 corresponds to the aperture of the shallow hole 11, preferably an interference fit. The bracket passes through the center of the front support frame 3, and the bracket and the front support frame 3 are clearance-matched. It is worth noting that in order to prevent damage to the inner wall of the shaft hole, the front support frame 3 is made of engineering plastics, which have lower strength and hardness than the workpiece 1. When the cutting force is transmitted during the processing, the rigidity and toughness requirements of the front support frame 3 are met during the processing, while ensuring that no secondary damage is caused to the workpiece 1. The rear support frame 4 is also a circular block structure and uses the same engineering plastics. This solves the problems of insufficient rigidity of the tool 22 during long and deep hole processing, and processing vibration and jump of the long guide rod 2, thereby improving processing accuracy and production efficiency.

[0032] Reference Figures 2 to 4, in order to increase the heat dissipation performance of the tool 22 and the workpiece 1 to be processed during drilling. Further, in this embodiment, a plurality of through holes 31 are provided on the front support frame 3. A connector 5 is provided in the through hole 31, and the connector 5 is connected to the coolant supply device through a hose 51. The connector 5 is preferably a quick connector 5 with a front thread and a rear release ring, and the connector 5 is threadedly connected to the front support frame 3 and connected to the hose 51 through a release ring. The front support frame 3 and the rear support frame 4 cooperate to divide the internal space of the shallow hole 11 to form a liquid injection cavity 12. Further, the guide rod 2 is provided with a liquid injection hole 23 along the central axis, and the liquid injection hole 23 penetrates to the outside world to the front end. The part of the guide rod 2 located in the liquid injection cavity 12 is provided with a leaching hole 24, and the leaching hole 24 is arranged perpendicular to the length direction of the guide rod 2, and one end or both ends of the leaching hole 24 penetrate the outer wall of the guide rod 2. The leaching hole 24 is connected to the liquid injection cavity 12, and the leaching hole 24 is connected to the liquid injection hole 23. The outer wall of the guide rod 2 is provided with a liquid outlet 25 near the tool 22, one end of the liquid outlet 25 is connected to the liquid injection hole 23, and the other end passes through the outer wall of the guide rod 2. The liquid outlet 25 is perpendicular to the liquid injection hole 23, or inclined toward the direction where the tool 22 is located.

[0033] In other possible embodiments, the front support frame 3 and the rear support frame 4 are both hollowed out. The coolant is directly poured into the shaft hole from the outside. The coolant reaches the tool 22 through the front support frame 3 and the rear support frame 4. However, this solution has low structural strength, and the material optimization of the front support frame 3 and the rear support frame 4 is required.

[0034] In other possible embodiments, the front support frame 3 adopts the combination of the through hole 31 and the joint 5 as described above, and the rear support frame 4 adopts a hollow setting. When the rear support frame 4 adopts a hollow structure, multiple structures can increase the structural strength reduced by the hollowing. When the rear support frame 4 is closed, the guide rod 2 needs to have a plurality of leaching holes 24, and the plurality of leaching holes 24 correspond to the positions of the plurality of injection chambers 12 divided by the rear support frame 4.

[0035] Reference Figure 4 Furthermore, a water collecting cover 41 is provided on one side of the rear support frame 4 close to the front support frame 3. The water collecting cover 41 is a cylindrical shell. An annular inner connecting piece 411 is provided at one end of the water collecting cover 41. The inner connecting piece 411 is provided with a plurality of bolts. The inner connecting piece 411 and the rear support frame 4 are detachably connected by bolts. The water collecting cover 41 collects the coolant and guides the coolant into the immersion hole 24.

[0036] Furthermore, especially when the shaft hole needs to be processed into a stepped hole structure, a baffle 32 is provided on one side of the front support frame 3 and the rear support frame 4, and the baffle 32 is provided in the shaft hole with a larger diameter, thereby increasing the sealing performance for the coolant.

[0037] Reference Figure 5Furthermore, the diameter of the liquid outlet hole 25 is larger than that of the liquid injection hole 23, and the diameter of the liquid injection hole 23 is larger than that of the leaching hole 24. During processing, the coolant is transported by the hose 51, flows through the leaching hole 24, the liquid injection hole 23, and the liquid outlet hole 25 in sequence, and reaches the cutting position of the tool 22 for cooling. Among them, because of the size design of each channel, it is ensured that the impurities entering from the leaching hole 24 can flow out from the liquid outlet hole 25 to avoid blockage.

[0038] The implementation principle of this embodiment is: Embodiment 2: A process method is to process the shaft hole of a flow regulating and pressure regulating valve according to the processing device for the shaft hole of the flow regulating and pressure regulating valve described in the first embodiment. The process method comprises the following steps: Step 1: machining a shallow axial hole in the workpiece 1, and withdrawing the guide rod 2 and the tool 22; Step 2, sequentially and spaced apart, install the rear support frame 4 and the front support frame 3 on the guide rod 2, and set the tool 22; Step 3, insert the front support frame 3, the rear support frame 4 and the guide rod 2 into the shaft hole; Step 4: interference fit the front support frame 3 and the rear support frame 4 with the shaft hole; Step 5: The power source torque is transmitted to the guide rod 2 through the tool handle 21 to rotate so as to machine the deep shaft hole.

[0039] In step five, the cooling liquid is supplied through a nozzle arranged on the front support frame 3 .

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A processing device for a flow regulating and pressure regulating valve shaft hole, characterized in that: It comprises a guide rod (2), a front support frame (3) and at least one rear support frame (4); One end of the guide rod (2) is provided with a tool handle (21) for connecting to a driving device; the other end is provided with a tool (22) for cutting; The front support frame (3) is fixedly connected to the shaft hole and is close to the knife handle (21); the guide rod (2) passes through the front support frame (3), and the guide rod (2) and the front support frame (3) rotate relative to each other; The rear support frame (4) is provided with at least one; the rear support frame (4) is fixedly connected to the shaft hole and is located between the front support frame (3) and the tool (22); the guide rod (2) passes through the rear support frame (4), and the guide rod (2) and the front support frame (3) rotate relative to each other.

2. The device for processing the shaft hole of the flow regulating and pressure regulating valve according to claim 1, characterized in that: A through hole (31) is formed through the front support frame (3); a nozzle is provided in the through hole (31), and the nozzle is provided with a hose (51) connected to a cooling liquid supply device.

3. The processing device for the flow regulating and pressure regulating valve shaft hole according to claim 2 is characterized in that: The through hole (31) is provided with an internal thread, and the spray head is threadably connected to the front support frame (3) via the internal thread.

4. The device for processing the shaft hole of the flow regulating and pressure regulating valve according to claim 2, characterized in that: The front support frame (3) and the rear support frame (4) separate a liquid injection cavity (12) in the shaft hole; the guide rod (2) is provided with a liquid injection hole (23) along the axis; the surface of the guide rod (2) is provided with an immersion hole (24) located in the liquid injection cavity (12); the guide rod (2) is provided with a liquid outlet hole (25) on the outer wall of one end of the tool (22); the immersion hole (24) is connected to the liquid injection hole (23), and the liquid injection hole (23) is connected to the liquid outlet hole (25).

5. The device for processing the shaft hole of the flow regulating and pressure regulating valve according to claim 4, characterized in that: The diameter of the liquid outlet hole (25) is larger than that of the liquid injection hole (23), and the diameter of the liquid injection hole (23) is larger than that of the leaching hole (24).

6. The device for machining the shaft hole of the flow regulating and pressure regulating valve according to claim 4, characterized in that: The rear support frame (4) is coaxially provided with a hollow water collection cover (41); the water collection cover (41) is connected to a side of the rear support frame (4) facing the front support frame (3).

7. The device for machining the shaft hole of the flow regulating and pressure regulating valve according to claim 6, characterized in that: The water collection cover (41) is detachably connected to the rear support frame (4) via bolts.

8. The device for machining the shaft hole of a flow regulating and pressure regulating valve according to claim 1, characterized in that: The front support frame (3) and the rear support frame (4) are both made of engineering plastics.

9. A process method, wherein the processing device for a flow regulating and pressure regulating valve shaft hole according to any one of claims 4 to 8 is used for processing the shaft hole, characterized in that: include: Step 1, machining a shallow axial hole in the workpiece (1), and withdrawing the guide rod (2) and the tool (22); Step 2, sequentially and at intervals, installing the rear support frame (4) and the front support frame (3) on the guide rod (2), and setting the tool (22); Step three, inserting the front support frame (3), the rear support frame (4) and the guide rod (2) into the shaft hole; Step 4, interference fit the front support frame (3) and the rear support frame (4) with the shaft hole; Step five: transmitting the torque of the power source to the guide rod (2) through the tool handle (21) to rotate it so as to machine the deep shaft hole.

10. The process according to claim 9, characterized in that: In the step five, cooling liquid is supplied through the nozzle arranged on the front support frame (3).

Images