Blind hole blowing device

Abstract

The utility model relates to the field of hole machining instruments, in particular to a blind hole blowing device which comprises a floating pipe seat, a hollow floating pipe is slidably mounted in the floating pipe seat, the top end of the floating pipe is communicated with a locking connector, the locking connector is communicated with an air blowing pipe, and check rings are fixed to the bottom of the locking connector and the top of the floating pipe seat. A reset spring is pressed between the two check rings and arranged outside the floating pipe in a sleeving mode, the bottom end of the floating pipe is connected with an air pipe connector, the bottom of the floating pipe is connected with a detection collision block, a travel switch is arranged below the detection collision block, the detection collision block can trigger the travel switch, the travel switch is electrically connected with a controller, and the controller is electrically connected with an alarm. According to the utility model, the problem of low production efficiency caused by independent operation of blow-off of the blind hole and detection of the broken cutter in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of hole processing equipment, in particular to a blind hole blowing device. Background Art

[0002] In the field of precision machining and electronic manufacturing, blind hole processing is a key technology, especially in the process of printed circuit board (PCB) production and precision parts manufacturing, the accurate processing and efficient cleaning of blind holes directly affect the quality and production efficiency of products. Blind holes are holes that are open at one end and closed at the other end or extend to a specific depth inside the workpiece. They are commonly found in complex structures that need to embed components or make internal connections.

[0003] Blind hole processing requires high precision to ensure that the hole diameter, depth and hole wall finish meet the design requirements. During the processing, due to the closed characteristics of the blind hole, the debris generated by cutting is easy to accumulate at the bottom of the hole and is not easy to remove, which has an adverse effect on the subsequent assembly or coating process and even leads to product quality problems. In addition, when using high-speed drilling or milling tools for blind hole processing, tool breakage is one of the common faults. Therefore, not only will debris accumulate in the blind hole, but there may also be broken tool residues. Tool breakage will not only cause product scrapping, but may also cause safety accidents. Therefore, the blowing of blind holes and the detection of broken tools are both crucial processes.

[0004] In practical applications, the two operations of blind hole blowing and broken tool detection are often performed independently of each other, which leads to several significant problems:

[0005] 1. Extended operation time: Separate execution of blowing and broken blade detection means that each process requires separate operation time and equipment preparation, which extends the entire processing flow and reduces production efficiency.

[0006] 2. Duplication of resources: Two independent operation processes require their own equipment support, which not only increases the equipment investment cost, but also occupies valuable production space, especially in production lines with limited space. Utility Model Content

[0007] The utility model aims to provide a blind hole blowing device to solve the problem of low production efficiency caused by independent operations of blind hole blowing and blade breakage detection.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] The blind hole blowing device comprises a floating tube seat, a hollow floating tube is slidably installed in the floating tube seat, the top of the floating tube is connected to a locking joint, the locking joint is connected to a blowing tube, retaining rings are fixed at the bottom of the locking joint and the top of the floating tube seat, a reset spring is pressed between the two retaining rings, the reset spring is sleeved on the outside of the floating tube, the bottom end of the floating tube is connected to an air pipe joint, the bottom of the floating tube is connected to a detection bump block, a travel switch is arranged below the detection bump block, the detection bump block can trigger the travel switch, the travel switch is electrically connected to a controller, and the controller is electrically connected to an alarm.

[0010] Preferably, as an improvement, a linear bearing is installed in the floating tube seat, a hollow slide rod is slidably connected in the linear bearing, the floating tube is fixed in the hollow slide rod, and the hollow slide rod is fixedly connected to the air pipe joint.

[0011] Preferably, as an improvement, the locking joint is threadedly connected to the floating pipe, and the blowing pipe is threadedly connected to the locking joint.

[0012] Preferably, as an improvement, the ratio of the diameter of the air blowing pipe to the inner diameter of the blind hole is 6:7, and the ratio of the diameter of the air blowing pipe to the wall thickness of the air blowing pipe is 3:1.

[0013] Preferably, as an improvement, it further comprises a box body, a mounting plate is installed in the box body, and the floating pipe seat and the travel switch are installed on the mounting plate.

[0014] The principles and beneficial effects of this solution are:

[0015] 1. This solution can not only blow the blind hole clean, but also detect broken blades, effectively improving production efficiency. Specifically: the manipulator grabs the workpiece so that its blind hole is aligned with the air blowing pipe and then moves downward, so that the air blowing pipe enters the blind hole. During the movement, the air blowing pipe blows air into the blind hole to clean up the debris in the blind hole and complete the blowing of the blind hole. If a broken blade is encountered during the process of entering the blind hole, the air blowing pipe cannot continue to enter due to the obstruction of the broken blade and slides down in the opposite direction. The air blowing pipe, floating pipe and detection block slide down as a whole, the detection block triggers the travel switch, and the alarm sounds, thereby completing the broken blade detection.

[0016] 2. A reset spring is installed between the retaining ring and the floating pipe seat, which can automatically reset after triggering the travel switch and removing the workpiece.

[0017] 3. This solution sets the floating tube in the linear bearing to achieve stable sliding.

[0018] 4. This solution adopts a split structure of the floating tube and the air blowing tube. The air blowing tube, locking joint, retaining ring, spring and other components can be replaced without disassembling the floating tube and the linear bearing, which is convenient for replacement.

[0019] 5. The ratio of the diameter of the air pipe to the inner diameter of the blind hole is 6:7, and the ratio of the diameter of the air pipe to the wall thickness of the air pipe is 3:1. Controlling the size of the air pipe within the scope of this solution can ensure that the air pipe does not deform after being subjected to force in the vertical direction, which can effectively extend the service life of the air pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0021] Figure 2 for Figure 1 A longitudinal sectional view of the present invention, wherein the housing is not shown. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] The figure marks in the drawings of the specification include: box body 1, mounting plate 11, floating tube seat 2, linear bearing 21, hollow slide rod 22, floating tube 3, retaining ring 31, return spring 32, air blowing tube 4, locking joint 41, workpiece 5, detection block 6, travel switch 7, operating head 71, air pipe joint 8.

[0024] Example:

[0025] like Figure 1 and Figure 2 As shown, the blind hole blowing device comprises a box body 1, a mounting plate 11 is bolted in the box body 1, and a floating pipe seat 2 and a travel switch 7 are bolted on the mounting plate 11. A hollow slide bar 22 is slidably connected in the floating pipe seat 2, and a trachea joint 8 is connected to the bottom end of the hollow slide bar 22. A hollow floating pipe 3 is fixedly connected in the hollow slide bar 22, and a locking joint 41 is threadedly connected to the top end of the floating pipe 3, and a blowing pipe 4 is threadedly connected to the top end of the locking joint 41. A retaining ring 31 is fixed at the bottom end of the locking joint 41 and the top end of the floating pipe seat 2, and a return spring 32 is pressed between the two retaining rings 31, and the return spring 32 is sleeved outside the floating pipe 3. A detection block 6 is fixedly connected to the bottom of the floating pipe 3, and an operating head 71 of the travel switch 7 (a part for receiving signals of mechanical moving parts) is located below the detection block 6 and can collide with the detection block 6. The travel switch 7 is electrically connected to a controller, and the controller is electrically connected to an alarm. In this embodiment, the controller adopts a single-chip microcomputer or a PLC, and the alarm adopts a buzzer alarm. In this embodiment, the diameter of the air pipe 4 is determined according to the inner diameter of the blind hole, and the specific determination standard is: the ratio of the diameter of the air pipe 4 to the inner diameter of the blind hole is 6:7. In addition, the wall thickness of the air pipe 4 is determined according to the diameter of the air pipe 4, and the specific determination standard is: the ratio of the diameter of the air pipe 4 to the wall thickness of the air pipe 4 is 3:1.

[0026] The working principle of the blind hole blowing device is:

[0027] The manipulator grabs the workpiece 5 and aligns its blind hole with the air blow pipe 4, then moves downward, so that the air blow pipe 4 enters the blind hole to a constant depth. During the insertion process, the air blow pipe 4 blows air into the blind hole to clean the debris in the blind hole and completes the blowing of the blind hole. If the broken knife residue is encountered during the process of entering the blind hole, the broken knife residue prevents the air blow pipe 4 from continuing to enter the blind hole, and the air blow pipe 4 slides downward, so that the air blow pipe 4, the locking joint 41, the retaining ring 31 on the floating tube 3, the floating tube 3, the hollow slide bar 22 and the detection collision block 6 slide down as a whole, and the detection collision block 6 hits the operating head 71 of the travel switch 7, and the travel switch 7 is triggered. At this time, the reset spring 32 is compressed, and the travel switch 7 sends a signal to the controller. The controller controls the alarm to sound an alarm, indicating that there are broken knife residues in the blind hole, thereby completing the detection of broken knives.

[0028] This solution can not only blow clean the blind hole, but also detect broken knives. In addition, in this solution, the ratio of the diameter of the air pipe 4 to the inner diameter of the blind hole is 6:7, and the ratio of the diameter of the air pipe 4 to the wall thickness of the air pipe 4 is 3:1, which can ensure that the air pipe 4 will not be deformed when subjected to force in the vertical direction, thereby extending the service life of the air pipe 4.

[0029] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Blind hole blowing device, characterized in that: It includes a floating tube seat, in which a hollow floating tube is slidably installed, the top of the floating tube is connected to a locking joint, the locking joint is connected to an air blowing pipe, retaining rings are fixed at the bottom of the locking joint and the top of the floating tube seat, a reset spring is pressed between the two retaining rings, the reset spring is sleeved on the outside of the floating tube, the bottom of the floating tube is connected to an air pipe joint, the bottom of the floating tube is connected to a detection bump block, a travel switch is arranged below the detection bump block, the detection bump block can trigger the travel switch, the travel switch is electrically connected to a controller, and the controller is electrically connected to an alarm.

2. The blind hole blowing device according to claim 1, characterized in that: A linear bearing is installed in the floating tube seat, a hollow slide rod is slidably connected in the linear bearing, the floating tube is fixed in the hollow slide rod, and the hollow slide rod is fixedly connected to the air pipe joint.

3. The blind hole blowing device according to claim 2, characterized in that: The locking joint is threadedly connected to the floating pipe, and the air blowing pipe is threadedly connected to the locking joint.

4. The blind hole blowing device according to claim 3, characterized in that: The ratio of the diameter of the air blowing pipe to the inner diameter of the blind hole is 6:7, and the ratio of the diameter of the air blowing pipe to the wall thickness of the air blowing pipe is 3:

1.

5. The blind hole blowing device according to claim 4, characterized in that: It also includes a box body, a mounting plate is installed in the box body, and a floating pipe seat and a travel switch are installed on the mounting plate.

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