A positioning and clamping device for processing a tubular musical instrument

Abstract

The utility model relates to musical instrument manufacturing technical field especially, more particularly to a kind of positioning clamping device for tubular musical instrument processing, including base, the base middle part opening pipe material placing recess, the base is equipped with drilling assembly, the base right side is equipped with motor, the base is rotatably connected with bidirectional screw rod, the base is slidably connected with two clamping blocks, two the clamping block is connected with the butt joint for positioning pipe material, one of the butt joint cooperation pipe material notch is provided with triangular block, the end of the clamping block towards the butt joint is provided with inclined plane, the clamping block upper end is provided with the pressing assembly for pressing pipe material. Through the precise meshing of triangular block at the end of butt joint and pipe material notch, cooperate with the guide inclined plane of clamping block inner side, make pipe material automatically center positioning under the driving of bidirectional screw rod, the rigid meshing of triangular block and notch completely locks pipe material circumferential degree of freedom, accurate punching is realized.

Description

Technical Field

[0001] This utility model relates to the field of musical instrument manufacturing technology, and in particular to a positioning and clamping device for processing tubular musical instruments. Background Technology

[0002] As important musical instruments, the sound quality and performance of wind instruments largely depend on the precise and complex manufacturing process of the instrument itself. This is especially true for brass instruments, whose core structure typically includes a vertical main tube and a horizontally or angled bell-shaped amplifying tube connected to it. The precision of the manufacturing of the connecting section, particularly the positional accuracy of the tone holes and the quality of the hole walls, has a decisive impact on the instrument's acoustic performance and lifespan.

[0003] Currently, when punching instrument tubes with specific end face angles, the commonly used equipment is a simple punch press or a specialized punching machine with simple positioning fixtures. The worker first places the tube into a pre-set groove on a workbench or fixture that roughly matches the tube's outline. Then, the worker usually needs to hold the tube body directly by hand to prevent it from moving during the punching process. Subsequently, the punching equipment is operated to punch holes at the target locations on the tube. This processing method, relying on manual holding and positioning, is still relatively common in small and medium-sized instrument manufacturing workshops or in specific processes.

[0004] However, the existing positioning and clamping method based on simple grooves and manual gripping has significant drawbacks. The tube is prone to circumferential rotation within the groove, and the groove's constraint on the tube's rotation around its own axis is very weak. When the operator holds the tube, it is extremely easy for it to deflect unexpectedly at the moment of contact with the punch or during pressurization, causing the punching position to deviate significantly from the design requirements. When a high-strength punch applies radial impact force to thin-walled copper or brass tubes, the lack of effective support for the inner wall of the tube causes plastic deformation such as collapse and indentation around the punching area. Although the tube shape will be optimized in subsequent processing, the indentation also affects the accuracy of punching. Utility Model Content

[0005] In order to overcome the shortcomings of circumferential instability and stamping collapse, this utility model provides a positioning and clamping device for processing tubular musical instruments, which aims to solve the above-mentioned shortcomings.

[0006] A positioning and clamping device for processing tubular musical instruments includes a base with an open tube placement groove in the middle. A drilling assembly is installed on the base, and a motor is installed on the right side of the base. A bidirectional lead screw is rotatably connected inside the base. Two clamping blocks are slidably connected to the base, and a docking component for positioning the tube is connected inside the two clamping blocks. One of the docking components has a triangular block that mates with the tube cut. An inclined surface facing the docking component is provided at one end of each of the two clamping blocks facing each other. A pressing assembly for pressing the tube is provided at the upper end of each clamping block.

[0007] Furthermore, the pressing assembly includes a mounting plate connected to the top of the clamping block. A pressing frame is vertically slidably connected to the mounting plate. A return spring is sleeved on the upper part of the pressing frame. The upper end of the return spring is connected to the mounting plate, and the lower end of the return spring is connected to the pressing frame.

[0008] Furthermore, the base is equipped with an electric push rod, which is located at the bottom of the drilling assembly, and a push plate is connected to one end of the electric push rod facing the groove in the base.

[0009] Furthermore, a stop is connected to the front side of the base.

[0010] Furthermore, the base has detachable protective shells connected to both the left and right ends of its top surface, and the clamping block and the mounting plate are slidably connected inside the protective shells.

[0011] Furthermore, several adhesive strips are connected within the groove of the base.

[0012] Furthermore, a protective pad is connected to the front side of the push plate.

[0013] Furthermore, the bottom of the pressing frame is rotatably connected to rollers.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By precisely engaging the triangular block at the end of the connector with the pipe cut, and with the guide slope on the inner side of the clamping block, the pipe is automatically centered and positioned under the drive of the bidirectional screw. The rigid engagement between the triangular block and the cut completely locks the circumferential degree of freedom of the pipe, achieving accurate punching.

[0015] 2. A rigid internal support structure is formed by inserting the connector into the pipe. When the drill bit of the drilling assembly impacts the pipe wall, the connector directly bears the radial pressure. At the same time, the rubber strip absorbs local vibration energy in the groove of the base, resisting pipe wall deformation in both directions and ensuring the geometric accuracy and acoustic performance of the hole wall. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a cross-sectional view showing the connection relationship between the motor and the bidirectional lead screw of this utility model.

[0018] Figure 3 This is a cross-sectional view showing the connection relationship between the mounting plate and the pressing bracket of this utility model.

[0019] In the attached diagram, the following are the reference numerals: 1_base, 2_drilling assembly, 3_motor, 4_double-acting lead screw, 5_clamping block, 6_connecting part, 7_mounting plate, 8_pressing bracket, 9_reset spring, 10_electric push rod, 11_push plate, 12_stop block, 13_protective shell, 14_rubber strip, 15_protective pad, 16_roller. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0021] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0022] Example: A positioning and clamping device for processing tubular musical instruments, such as Figures 1-3 As shown, the system includes a base 1, a drilling assembly 2, a motor 3, a two-way lead screw 4, clamping blocks 5, a connecting piece 6, and a pressing assembly. The base 1 has an open, arc-shaped groove for placing the pipe. The drilling assembly 2 is installed on the base 1 and vertically drives the drill bit to move up and down. The motor 3 is installed on the right side of the base 1. The two-way lead screw 4 is rotatably connected inside the base 1. The base 1 is slidably connected to two clamping blocks 5. The connecting piece 6 for positioning the pipe is connected inside the two clamping blocks 5. One of the connecting pieces 6 has a triangular block that matches the pipe cut. The two clamping blocks 5 have an inclined surface facing the connecting piece 6 at their opposite ends. The base 1 is equipped with a controller that is wired to all electrical equipment. The upper end of the clamping blocks 5 is equipped with a pressing assembly for pressing the pipe.

[0023] like Figure 1 and Figure 3As shown, the pressing assembly includes a mounting plate 7, a pressing frame 8, and a return spring 9. The mounting plate 7 is connected to the top of the clamping block 5. The pressing frame 8 is vertically slidably connected to the mounting plate 7. The return spring 9 is sleeved on the upper part of the pressing frame 8. The upper end of the return spring 9 is connected to the mounting plate 7, and the lower end of the return spring 9 is connected to the pressing frame 8.

[0024] like Figure 1 and Figure 2 As shown, it also includes an electric push rod 10 and a push plate 11. The electric push rod 10 is installed on the base 1. The electric push rod 10 is located at the bottom of the drilling assembly 2. The end of the electric push rod 10 facing the groove of the base 1 is connected to the push plate 11. After the clamping is released, the electric push rod 10 pushes the push plate 11 forward and automatically pushes it out, reducing the number of times the hand needs to be inserted into the equipment.

[0025] like Figure 1 As shown, it also includes a stop 12. The stop 12 is connected to the front side of the base 1. The stop prevents the pipe from slipping and improves the safety of material handling.

[0026] like Figure 1 As shown, it also includes a protective housing 13. The left and right ends of the top surface of the base 1 are connected to the detachable protective housing 13. The clamping block 5 and the mounting plate 7 are slidably connected inside the protective housing 13, covering the moving area of ​​the bidirectional lead screw 4 and the clamping block 5, isolating external dust and debris, and ensuring transmission accuracy.

[0027] like Figure 1 and Figure 2 As shown, it also includes rubber strips 14. Several rubber strips 14 are connected in the groove of the base 1. In addition to providing initial buffer when placing the pipe and absorbing the impact vibration of the drill bit during the punching process, the friction generated by the lateral elastic deformation of the clamping block 5 and the connecting piece 6 during the withdrawal of the pipe constrains the pipe and prevents it from accidentally sliding or rolling in the groove, ensuring that the pipe is stable in the groove and waiting to be pushed out.

[0028] like Figure 1 As shown, it also includes a protective pad 15. The front side of the push plate 11 is connected to the protective pad 15. When the push plate 11 pushes the pipe, the protective pad 15 undergoes elastic deformation after contacting the end face of the pipe, preventing the push plate from scratching the pipe and making the pushing action more stable and reliable.

[0029] like Figure 3 As shown, it also includes a roller 16. The bottom of the pressing frame 8 is rotatably connected to the roller 16. The roller 16 rolls in contact with the surface of the pipe, which reduces the sliding friction resistance between the pressing frame 8 and the surface of the pipe and avoids scratching the surface of the pipe.

[0030] The worker places the pipe to be processed into the placement groove of the base 1. The weight of the pipe causes the rubber strip 14 in the groove to elastically deform, providing initial cushioning and limiting. During placement, the worker must ensure that the direction and angle of the pipe cut are roughly correct. Then, the motor 3 is started, driving the bidirectional lead screw 4 to rotate. The rotating bidirectional lead screw 4 pushes two clamping blocks 5 to slide synchronously from both sides of the base 1 towards the center. During the sliding process, the inclined structure on the inner side of the clamping blocks 5 guides the pipe to move automatically to the center. At the same time, the clamping blocks 5 drive the top mounting plate 7 to move, so that the pressing component is positioned synchronously. Finally, the clamping blocks 5 push the internal connecting parts 6 to precisely insert into the two ends of the pipe. The triangular block on one of the connecting parts 6 tightly engages with the cut of the pipe, thereby precisely locking the circumferential position and angle of the pipe. The connecting part 6, inserted into the pipe, provides crucial internal wall support. When the triangular block on the connecting part 6 is in place with the cut, the pipe is completely positioned. At this time, the roller 16 at the bottom of the pressing frame 8 contacts the surface of the pipe and is squeezed. The roller 16, together with the pressing frame 8, overcomes the elastic force of the return spring 9 and slides vertically upward along the mounting plate 7, causing the return spring 9 to be compressed and stored. The compressed return spring 9 generates a continuous downward elastic restoring force, which is transmitted through the pressing frame 8 and the roller 16, applying a stable vertical downward clamping force to both ends of the pipe to prevent the pipe from jumping or tilting. After the pipe is firmly positioned and clamped, the drilling assembly 2 is started, and its drill bit performs a precise punching operation on the pipe. During the punching process, the internal support of the mating part 6 effectively prevents the pipe from deforming inward, and the rubber strip 14 in the groove absorbs part of the impact vibration. After the punching is completed, the drill bit of the drilling assembly 2 first retracts to its original position. Then, the motor 3 drives the bidirectional lead screw 4 in reverse to reverse, causing the two clamping blocks 5 to slide synchronously towards both ends of the base 1. When the clamping blocks 5 separate, the mating parts 6 on their inner sides gradually withdraw from both ends of the pipe. During the process of the clamping block 5 and the connecting piece 6 disengaging from the pipe, the horizontally arranged rubber strip 14 uses its elastic deformation and frictional resistance to restrict the pipe from sliding or rolling to the left or right sides within the groove along with the connecting piece 6. Simultaneously, as the clamping force is released, the roller 16, pushed by the return spring 9, slides downwards along the mounting plate 7 to reset, maintaining contact with the pipe surface and rolling until it completely detaches from the pipe surface, at which point the return spring 9 returns to its natural state. Once the connecting piece 6 is completely withdrawn from the pipe, the electric push rod 10 is activated. The push rod of the electric push rod 10 extends, pushing the push plate 11 at its front end towards the pipe in the placement groove. The protective pad 15 on the front side of the push plate 11 first contacts the pipe end face and undergoes elastic deformation, providing both cushioning and increased friction. As the push plate 11 continues to move forward, the punched pipe is smoothly pushed out of the placement groove of the base 1. The stop block 12 located on the front side of the base 1 acts as a barrier to prevent the pushed-out pipe from falling. Workers can take the processed pipe at stop 12 and put in the next pipe to be processed, thus repeating the entire punching process.

[0031] The protective housing 13 is detachably installed on the left and right ends of the top surface of the base 1. The protective housing 13 covers the moving area of ​​the bidirectional lead screw 4, the clamping block 5 and the mounting plate 7, and closes the top opening to effectively prevent dust, metal shavings and other impurities from falling into the moving mechanism, ensuring the cleanliness and smooth operation of the transmission components and extending the service life of the equipment.

[0032] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A positioning and clamping device for processing tubular musical instruments, characterized in that, The device includes a base (1) with an opening in the middle for placing a pipe. A drilling assembly (2) is installed on the base (1). A motor (3) is installed on the right side of the base (1). A two-way lead screw (4) is rotatably connected inside the base (1). Two clamping blocks (5) are slidably connected to the base (1). A docking piece (6) for positioning the pipe is connected inside the two clamping blocks (5). One of the docking pieces (6) has a triangular block that matches the pipe cut. An inclined surface facing the docking piece (6) is provided at one end of the two clamping blocks (5). A pressing assembly for pressing the pipe is provided at the upper end of the clamping block (5).

2. The positioning and clamping device for processing tubular musical instruments according to claim 1, characterized in that, The pressing assembly includes a mounting plate (7) connected to the top of the clamping block (5). The mounting plate (7) is vertically slidably connected to a pressing frame (8). A return spring (9) is sleeved on the upper part of the pressing frame (8). The upper end of the return spring (9) is connected to the mounting plate (7), and the lower end of the return spring (9) is connected to the pressing frame (8).

3. The positioning and clamping device for processing tubular musical instruments according to claim 2, characterized in that, The base (1) is equipped with an electric push rod (10), which is located at the bottom of the drilling assembly (2). The end of the electric push rod (10) facing the groove of the base (1) is connected to a push plate (11).

4. The positioning and clamping device for processing tubular musical instruments according to claim 1, characterized in that, A stop (12) is connected to the front side of the base (1).

5. A positioning and clamping device for processing tubular musical instruments according to claim 2, characterized in that, The base (1) has a detachable protective shell (13) connected to both the left and right ends of its top surface. The clamp (5) and the mounting plate (7) are slidably connected inside the protective shell (13).

6. The positioning and clamping device for processing tubular musical instruments according to claim 1, characterized in that, The base (1) has several rubber strips (14) connected in the groove.

7. A positioning and clamping device for processing tubular musical instruments according to claim 3, characterized in that, A protective pad (15) is connected to the front side of the push plate (11).

8. A positioning and clamping device for processing tubular musical instruments according to claim 2, characterized in that, The bottom of the pressing frame (8) is rotatably connected to a roller (16).

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