A gun drill guiding auxiliary device for improving the machining precision of a deep hole of a plunger rod

Abstract

The utility model discloses a gun drill guiding auxiliary device of promoting pressure injection rod deep hole machining precision belongs to gun drill processing technical field, including auxiliary frame, the auxiliary frame upper surface rotationally connected with the fixed frame, and the auxiliary frame upper surface slidingly connected with the lower guide block, and the lower guide block upper end slidingly connected with the upper guide block, and the upper guide block outside is pasted with the fixed frame inner wall simultaneously, the upper guide block inside is all set up with the lower guide block inside connection groove, and the connection groove surface fixedly connected with the reinforcing rib. The gun drill guiding auxiliary device of promoting pressure injection rod deep hole machining precision, through setting up the auxiliary frame and the fixed frame, effectively avoid the gun drill and appear deviation when initial drilling, from the machining starting stage just has guaranteed the position precision of deep hole machining, restricts the displacement of gun drill in each direction simultaneously, controls position deviation in the extremely small range, effectively reduces the accumulation of position deviation, guarantees the straightness and cylindricity of deep hole machining.

Description

Technical Field

[0001] This utility model relates to the field of gun drilling technology, specifically to a gun drill guiding auxiliary device for improving the accuracy of deep hole machining of injection rods. Background Technology

[0002] Gun drilling is a high-efficiency, high-precision deep hole machining technology. It uses high-pressure coolant to expel chips from the V-groove of the drill bit, making it suitable for machining deep holes with large length-to-diameter ratios. Gun drilling offers a higher feed rate per minute than twist drills, making it suitable for mass production. It can also machine complex structures such as cross holes, blind holes, and flat-bottomed blind holes, and is compatible with shafts, housings, and other parts. However, gun drilling suffers from instability, requiring operators to perform additional machining steps to correct it, extending the overall machining time and reducing production efficiency. Furthermore, the use of an auxiliary frame for fixation during gun drilling increases the difficulty of operation.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent application number 202022111695.4, application date 2020-09-23) provides a fine-tuning drive structure for a guide seat of a novel gun drill device and a novel gun drill device, including a cylinder body, an air chamber inside the cylinder body, a hollow piston inside the air chamber, a guide seat at one end of the hollow piston, a cylinder end cap at one end of the cylinder body, an end cap opening inside the cylinder end cap for the hollow piston to pass through, and a peripheral side wall of the cylinder body with a function communicating with the air chamber for supplying air to the hollow piston. The hollow piston moves towards the cylinder end cover via a first air intake section. The cylinder end cover has a second air intake section on its peripheral wall that communicates with the air chamber to supply air and move the hollow piston away from the cylinder end cover. The cylinder body has a sensing device on its peripheral wall that communicates with the air chamber. The hollow piston has a sensing part on its outer peripheral wall that can move with the hollow piston to a position corresponding to the sensing device. By controlling the air intake of the first and second air intake sections, the hollow piston can be driven to move the guide seat. The structure is simple and easy to operate.

[0004] When a gun drill cuts the injection rod, it is subjected to a large cutting force, which may cause the gun drill to wobble or vibrate, thus affecting the machining accuracy and quality. The auxiliary frame is usually made of high-strength and high-rigidity materials, which have good resistance to deformation and can provide stable support for the gun drill, effectively dispersing the cutting force. This allows the gun drill to maintain a stable posture under strong cutting force, reducing vibration and wobble, and ensuring a smooth machining process. However, the above-mentioned devices cannot effectively prevent the gun drill from deviating during machining, resulting in the deep hole of the injection rod and the part not fitting precisely, affecting the assembly accuracy and performance of the entire equipment, as well as the overall operating performance of the equipment. Utility Model Content

[0005] The purpose of this invention is to provide a gun drill guide auxiliary device to improve the machining accuracy of deep holes in the injection rod, so as to solve the problem mentioned in the background art that the deviation of the gun drill during machining cannot be effectively avoided, resulting in the inability to accurately match the deep hole of the injection rod with the part, affecting the assembly accuracy and performance of the entire equipment, and also affecting the overall operating performance of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A gun drill guiding auxiliary device for improving the deep hole machining accuracy of a pressure injection rod includes an auxiliary frame. A fixed frame is rotatably connected to the upper surface of the auxiliary frame, and a lower guide block is slidably connected to the upper surface of the auxiliary frame. An upper guide block is slidably connected to the upper end of the lower guide block, and the outer side of the upper guide block is in contact with the inner wall of the fixed frame. A connecting groove is formed inside both the upper guide block and the lower guide block, and a reinforcing rib is fixedly connected to the surface of the connecting groove. A graphite pad is fixedly connected to the surface of the reinforcing rib, and a gun drill is slidably connected to the surface of the graphite pad. The gun drill is slidably disposed on the inner wall of the fixed frame. A connecting block is fixedly connected to the lower surface of the upper guide block through a snap-fit ​​structure, and the connecting blocks are symmetrically distributed about the center of the upper guide block.

[0008] Preferably, a positioning block is fixedly connected to the lower rear end of the upper guide block, and the positioning blocks are symmetrically distributed about the center of the upper guide block.

[0009] Preferably, the connecting block has a sliding groove inside, and a fixed spring is fixedly connected to one end of the sliding groove surface.

[0010] Preferably, a sliding block is fixedly connected to the other end of the fixed spring, and the sliding block is slidably disposed on the surface of the sliding groove.

[0011] Preferably, a pull rope is fixedly connected to one end of the sliding block surface near the sliding groove, and the pull rope is slidably disposed inside the connecting block.

[0012] Preferably, the lower guide block has a positioning groove inside, and the connecting block is slidably connected to the surface of the positioning groove, and a fixing block is fixedly connected to the upper rear side of the lower guide block.

[0013] Preferably, the fixed block has a movable groove inside, and one end of a connecting spring is fixedly connected to the surface of the movable groove, while the other end of the connecting spring is fixedly connected to a force plate, and the upper surface of the force plate is in contact with the lower surface of the positioning block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod adopts a novel structural design, the specific details of which are as follows:

[0015] This gun drill guide auxiliary device, which improves the accuracy of deep hole machining of the injection rod, effectively prevents the gun drill from deviating during the initial drilling process through the set auxiliary frame and fixed frame. It ensures the positional accuracy of deep hole machining from the beginning stage of machining, while limiting the displacement of the gun drill in all directions and controlling the positional deviation within a very small range. This effectively reduces the accumulation of positional deviation and ensures the straightness and cylindricity of deep hole machining.

[0016] Furthermore, it can provide stable support for the gun drill, disperse the cutting force, and enable the gun drill to maintain a stable posture when subjected to cutting force, thereby reducing vibration and sway caused by cutting force and improving machining accuracy.

[0017] This gun drill guide auxiliary device, which improves the accuracy of deep hole machining of the injection rod, facilitates the replacement of the guide auxiliary device by operators through the setting of sliding blocks and force plates. It greatly reduces equipment downtime and eliminates the need for long waiting times for complex installation and debugging, allowing the guide auxiliary device to be put into use quickly. The machining process is more compact and efficient, significantly improving the overall production efficiency.

[0018] Furthermore, this effectively avoids production delays caused by equipment failures, reduces the risks of order defaults and increased costs due to delays, and ensures the smooth progress of production plans.

[0019] (3) The gun drill guide auxiliary device for improving the accuracy of deep hole machining of the injection rod improves the stability of gun drill machining by setting the lower guide block and the upper guide block, reduces the swing amplitude of the gun drill, keeps the gun drill in a stable axial position, improves the cylindricity and straightness of the machined hole, and increases the constraint of the gun drill in the axial direction, reduces axial vibration, ensures stable feed of the gun drill in the axial direction, and improves the accuracy and surface quality of deep hole machining. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection structure between the fixing frame and the upper guide block of this utility model.

[0021] Figure 2 This is a schematic diagram of the connection structure between the auxiliary frame and the fixed frame of this utility model.

[0022] Figure 3 This is a schematic diagram of the connection structure between the lower guide block and the fixed block of this utility model.

[0023] Figure 4 This is a schematic diagram of the connection structure between the upper guide block and the positioning block of this utility model.

[0024] Figure 5 This is a schematic diagram of the connection structure between the pull rope and the sliding block of this utility model.

[0025] Figure 6 This is a schematic diagram of the connection structure between the reinforcing rib and the graphite pad of this utility model.

[0026] Figure 7 This is a schematic diagram of the connection structure between the load-bearing plate and the connecting spring of this utility model.

[0027] Attached diagram descriptions: 1. Auxiliary frame; 2. Fixed frame; 3. Lower guide block; 4. Reinforcing rib; 5. Graphite pad; 6. Positioning groove; 7. Fixed block; 8. Connecting spring; 9. Force plate; 10. Upper guide block; 11. Positioning block; 12. Sliding groove; 13. Fixed spring; 14. Sliding block; 15. Pull rope; 16. Connecting groove; 17. Gun drill; 18. Moving groove; 19. Connecting block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: By using the auxiliary frame 1, the fixed frame 2, and the graphite pad 5, the gun drill 17 is effectively prevented from shifting during the initial drilling, ensuring the positional accuracy of deep hole machining from the very beginning of the machining process. Figures 1-3 As shown: It includes an auxiliary frame 1, a fixed frame 2 rotatably connected to the upper surface of the auxiliary frame 1, a lower guide block 3 slidably connected to the upper surface of the auxiliary frame 1, and an upper guide block 10 slidably connected to the upper end of the lower guide block 3. At the same time, the outer side of the upper guide block 10 is in contact with the inner wall of the fixed frame 2. A connecting groove 16 is opened in both the interior of the upper guide block 10 and the interior of the lower guide block 3. A reinforcing rib 4 is fixedly connected to the surface of the connecting groove 16, and a graphite pad 5 is fixedly connected to the surface of the reinforcing rib 4. At the same time, a gun drill 17 is slidably connected to the surface of the graphite pad 5. The gun drill 17 is slidably set in the inner wall of the fixed frame 2. A connecting block 19 is fixedly connected to the lower surface of the upper guide block 10 through a snap-fit ​​structure, and the connecting blocks 19 are symmetrically distributed about the center of the upper guide block 10.

[0030] The operator inserts the gun drill 17 through the inner wall of the mounting bracket 2 and brings it into contact with the surface of the graphite pad 5 inside the lower guide block 3 and the upper guide block 10 (e.g., Figure 1 and Figure 3 As shown), during installation, it is necessary to ensure that the gun drill 17 fits well with the graphite pad 5 of the guide block, and that the axis of the gun drill 17 is strictly aligned with the axis of the guide hole of the lower guide block 3 and the upper guide block 10, ensuring that the gun drill 17 is on the accurate guide path from the initial position. Simultaneously, the fixing bracket 2 is connected to the auxiliary bracket 1 to fix the gun drill 17 in place (as shown). Figure 2As shown), ensuring precise alignment of the gun drill 17 with the axis of the deep hole to be machined, when the machining equipment is started, the gun drill 17 begins to rotate and feeds towards the deep hole to be machined on the injection rod. This effectively prevents the gun drill 17 from deviating during the initial drilling, ensuring the positional accuracy of the deep hole machining from the very beginning of the machining process. When the operator replaces the guide auxiliary device (such as...), Figure 5 As shown, by pulling the rope 15 at the upper end of the upper guide block 10, the guide auxiliary device can be replaced, greatly reducing equipment downtime.

[0031] Example 2: In this example, unlike Example 1, the connecting block 19, fixing spring 13, and sliding block 14 facilitate the replacement of the guide auxiliary device by the operator, greatly reducing equipment downtime. Figures 3-4 As shown: A positioning block 11 is fixedly connected to the lower rear end of the upper guide block 10, and the positioning blocks 11 are symmetrically distributed about the center of the upper guide block 10. A sliding groove 12 is provided inside the connecting block 19, and one end of a fixing spring 13 is fixedly connected to the surface of the sliding groove 12. A sliding block 14 is fixedly connected to the other end of the fixing spring 13, and the sliding block 14 is slidably disposed on the surface of the sliding groove 12. A pull rope 15 is fixedly connected to one end of the surface of the sliding block 14 near the sliding groove 12, and the pull rope 15 is slidably disposed inside the connecting block 19.

[0032] When the operator replaces the guide auxiliary device, they pull the upper guide block 10's upper rope 15, causing the rope 15 to slide inside the connecting block 19 (e.g., Figure 4 As shown), the pull rope 15 drives the sliding block 14 on the surface of the sliding groove 12 to slide, while the fixing spring 13 on the surface of the sliding block 14 retracts towards the inner wall of the connecting block 19. When the sliding block 14 is completely inside the connecting block 19, the operator can pull the upper guide block 10 upwards to separate the upper guide block 10 from the lower guide block 3 (as shown). Figure 5 As shown in the figure, it makes it easy for operators to replace the guide auxiliary device, greatly shortens the equipment downtime, eliminates the need for long waits for complex installation and debugging, and enables the guide auxiliary device to be put into use quickly. The processing flow is more compact and efficient, significantly improving the overall production efficiency, while effectively avoiding production delays caused by equipment failure.

[0033] Example 3: In this example, unlike Example 2, the positioning groove 6, connecting spring 8, and force plate 9 enable the lower guide block 3 and upper guide block 10 to connect quickly, improving the working efficiency of the device. Figures 6-7As shown: The lower guide block 3 has a positioning groove 6 inside, and a connecting block 19 is slidably connected to the surface of the positioning groove 6. A fixing block 7 is fixedly connected to the upper rear side of the lower guide block 3. A moving groove 18 is opened inside the fixing block 7, and one end of a connecting spring 8 is fixedly connected to the surface of the moving groove 18. A force plate 9 is fixedly connected to the other end of the connecting spring 8. At the same time, the upper surface of the force plate 9 is in contact with the lower surface of the positioning block 11.

[0034] When the operator connects the lower guide block 3 and the upper guide block 10, the operator ensures that the inner walls of the lower guide block 3 and the upper guide block 10 are tightly fitted against the outer side of the gun drill 17 (e.g., Figure 1 As shown), when the connecting block 19 at the lower end of the upper guide block 10 contacts the lower guide block 3, the lower guide block 3 pushes the sliding block 14 to slide towards the inner wall of the connecting block 19, and causes the fixing spring 13 on the surface of the sliding block 14 to contract towards the inner wall of the connecting block 19, so that the connecting block 19 slides on the surface of the positioning groove 6 inside the lower guide block 3 (as shown). Figure 6 As shown), and the positioning block 11 on the rear side of the upper guide block 10 slides on the surface of the moving groove 18, causing the force plate 9 and the connecting spring 8 to retract towards the inner wall of the fixed block 7. When the upper surface of the lower guide block 3 is in contact with the lower surface of the upper guide block 10, the fixed spring 13 pushes the sliding block 14 to slide on the surface of the positioning groove 6 (as shown). Figure 7 As shown in the figure, it fits tightly with the positioning groove 6, thereby connecting the lower guide block 3 and the upper guide block 10, improving the working efficiency of the device, and ensuring the smooth progress of the production plan.

[0035] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gun drill guide auxiliary device for improving the machining accuracy of deep holes in a pressure injection rod, comprising an auxiliary frame (1), a fixed frame (2) rotatably connected to the upper surface of the auxiliary frame (1), and a lower guide block (3) slidably connected to the upper surface of the auxiliary frame (1), and an upper guide block (10) slidably connected to the upper end of the lower guide block (3), while the outer side of the upper guide block (10) is in contact with the inner wall of the fixed frame (2); characterized in that: Both the upper guide block (10) and the lower guide block (3) have connecting grooves (16) inside, and the surface of the connecting groove (16) is fixedly connected with a reinforcing rib (4), and the surface of the reinforcing rib (4) is fixedly connected with a graphite pad (5). At the same time, the surface of the graphite pad (5) is slidably connected with a gun drill (17). The gun drill (17) is slidably disposed on the inner wall of the fixed frame (2). The lower surface of the upper guide block (10) is fixedly connected with a connecting block (19) through a snap-fit ​​structure, and the connecting blocks (19) are symmetrically distributed about the center of the upper guide block (10).

2. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 1, characterized in that: The lower rear end of the upper guide block (10) is fixedly connected to a positioning block (11), and the positioning block (11) is symmetrically distributed about the center of the upper guide block (10).

3. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 1, characterized in that: The connecting block (19) has a sliding groove (12) inside, and a fixed spring (13) is fixedly connected to one end of the sliding groove (12).

4. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 3, characterized in that: The other end of the fixed spring (13) is fixedly connected to a sliding block (14), and the sliding block (14) is slidably disposed on the surface of the sliding groove (12).

5. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 4, characterized in that: A pull rope (15) is fixedly connected to one end of the surface of the sliding block (14) near the sliding groove (12), and the pull rope (15) is slidably disposed inside the connecting block (19).

6. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 2, characterized in that: The lower guide block (3) has a positioning groove (6) inside, and the connecting block (19) is slidably connected to the surface of the positioning groove (6), and a fixing block (7) is fixedly connected to the upper rear side of the lower guide block (3).

7. The gun drill guide auxiliary device for improving the deep hole machining accuracy of the injection rod according to claim 6, characterized in that: The fixed block (7) has a moving groove (18) inside, and one end of the connecting spring (8) is fixedly connected to the surface of the moving groove (18), and the other end of the connecting spring (8) is fixedly connected to the force plate (9). At the same time, the upper surface of the force plate (9) is in contact with the lower surface of the positioning block (11).

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