Composite tool with internal telescopic tool bit

Abstract

The utility model provides a compound tool with an inner telescopic tool bit, which comprises an air cylinder, an air cylinder support is arranged on the left side of the air cylinder, the air cylinder is fixed on the side face of the air cylinder support, a center rod is arranged at the output end of the air cylinder, a U-shaped frame is arranged at the tail end of the center rod, and the U-shaped frame is fixedly connected with the center rod through an M14 inner hexagon screw. A main shaft is arranged in the U-shaped frame, a pipe joint is arranged outside the main shaft, the main shaft is connected with the U-shaped frame through the pipe joint, the main shaft is sleeved with a push pipe, a cutter assembly is arranged in the push pipe in a penetrating mode, and the cutter assembly is connected with the tail end of the main shaft. A worker only needs to clamp a product once, operation is easy, and precision is high. The device can be widely applied to machining of various series of products, the efficiency and quality of the products are greatly improved, and meanwhile cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, and in particular to a composite cutting tool with an internal telescopic cutting head. Background Technology

[0002] Currently, the machining process for the inner hole of aluminum cylinders is divided into three steps: straightening machining, deep hole machining, and inner groove cutting. However, there are several problems: 1. During the production process, the three steps are clamped three times each. The clamping accuracy is insufficient, which causes some dimensions to exceed the drawing requirements, resulting in a scrap rate of 5%.

[0003] 2. With three processes going back and forth, the probability of the product being scratched or bumped is high. The damaged areas need to be ground and polished separately later, which wastes manpower and resources.

[0004] 3. The employees are currently responsible for the production and inspection of three processes. The workload is high and it is easy to cause batch quality problems, especially the problem of missing parts in the inner groove, which poses a great threat to the safety of the product.

[0005] To address these issues, a composite cutting tool with an internal telescopic cutting head is proposed. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a composite cutting tool with an internal telescopic cutting head.

[0007] This utility model is achieved using the following technical solution:

[0008] A composite cutting tool with an internal telescopic cutting head includes a cylinder. A cylinder support is provided on the left side of the cylinder. The cylinder is fixed to the side of the cylinder support. A center rod is provided at the output end of the cylinder. A U-shaped bracket is provided at the end of the center rod. The U-shaped bracket is fixedly connected to the center rod by an M14 hexagon socket screw.

[0009] The U-shaped frame contains a main spindle, and the outside of the main spindle is provided with a pipe joint. The main spindle and the U-shaped frame are connected through the pipe joint. A push tube is sleeved on the outside of the main spindle, and a tool assembly is inserted through the push tube. The tool assembly is connected to the end of the main spindle.

[0010] The U-shaped frame is provided with a bearing sleeve at one end near the main shaft. The bearing sleeve is engaged in the U-shaped frame and the bearing sleeve is fixedly connected to the U-shaped frame by an M8 hexagon socket screw.

[0011] The bearing sleeve is equipped with a ball bearing and a thrust ball bearing. The ball bearing is located on the left side of the bearing sleeve, and the thrust ball bearing is located on the right side of the bearing sleeve. The pipe joint passes through the ball bearing and the thrust ball bearing, and the main shaft passes through the pipe joint.

[0012] The ball bearing has a first shaft elastic retaining ring on its left side, and the thrust ball bearing has a second shaft elastic retaining ring on its right side.

[0013] A thrust rod is provided on the right side of the thrust ball bearing, and a slider is provided at the end of the thrust rod. The slider is sleeved on the main shaft, and a return spring is provided between the slider and the push tube. The slider and the push tube are elastically connected through the return spring.

[0014] The present invention has the following advantages over the prior art:

[0015] 1. During the machining process on the straightening machine, after the spindle rotation machining of the product head dimension is completed, the control system sends an electrical signal to the cylinder. Upon receiving the signal, the cylinder pushes the center rod forward, and the U-shaped bracket connected to it via an M14 hex socket also moves forward. The bearing sleeve is connected to the U-shaped bracket via an M8 hex socket and driven by the bearing, fixed by a retaining ring. The thrust rod contacts the bearing plane and moves forward under the transmission action. The thrust rod pushes the slider, which in turn pushes the push tube forward. After the tool assembly connected to the push tube is pushed, its internal sliding push rod pushes the retractable cutter head. When the cutter head is pushed out, the groove on the product is machined under the rotation of the spindle. After machining is completed, the control system continues to send electrical signals to the cylinder. Upon receiving the signal, the cylinder retracts the center rod, and the U-shaped bracket connected to it via an M14 hex socket also retracts. The bearing sleeve is connected to the U-shaped bracket via an M8 hex socket and driven by the bearing, fixed by a retaining ring. The bearing plane retracts, and the push rod decreases backward under the action of the return spring. The push tube disengages from the push rod, and under the action of the return spring inside the tool assembly, the push tube retracts, the telescopic cutter head retracts, and the product processing is completed. The product is then disassembled. This combines the straightening and internal groove cutting processes during the machining of the aluminum cylinder's inner hole. The tool has a simple structure, is highly practical, and is suitable for machining various types of aluminum cylinders. It significantly improves product quality while reducing manufacturing costs and employee workload, and increasing production efficiency—a win-win situation. 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 partially enlarged view of the transmission part of this utility model;

[0018] Figure 3 This is a partial enlarged view of the cutting tool part of this utility model;

[0019] In the diagram: 1. Cylinder bracket; 2. Cylinder; 3. M14 hex socket head cap screw; 4. Connecting rod; 5. M8 hex socket head cap screw; 6. Push tube; 7. Tool assembly; 8. U-shaped bracket; 9. Elastic retaining ring for the first axis; 10. Ball bearing; 11. Bearing sleeve; 12. Thrust ball bearing; 13. Elastic retaining ring for the second axis; 14. Pipe joint; 15. Thrust rod; 16. Slider; 17. Return spring; 18. Spindle. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 3 As shown, an internal telescopic cutting head composite tool includes a cylinder 2. A cylinder support 1 is provided on the left side of the cylinder 2. The cylinder 2 is fixed to the side of the cylinder support 1. A central rod is provided at the output end of the cylinder 2. A U-shaped frame 8 is provided at the end of the central rod. The U-shaped frame 8 is fixedly connected to the central rod by an M14 hexagon socket screw 3 to ensure the stability and reliability of the structure.

[0023] The U-shaped frame 8 is equipped with a main shaft 18, and the main shaft 18 is equipped with a pipe joint 14 on the outside. The main shaft 18 and the U-shaped frame 8 are connected through the pipe joint 14 to realize the rotation and axial movement of the main shaft 18. A push tube 6 is sleeved on the outside of the main shaft 18, and a tool assembly 7 is inserted through the push tube 6. The tool assembly 7 is connected to the end of the main shaft 18. The axial movement of the main shaft 18 drives the tool assembly 7 to perform telescopic operations.

[0024] Furthermore, in order to enhance the rotational stability and load-bearing capacity of the spindle 18, a bearing sleeve 11 is provided at one end of the U-shaped frame 8 near the spindle 18. The bearing sleeve 11 is engaged in the U-shaped frame 8, and the bearing sleeve 11 and the U-shaped frame 8 are fixedly connected by M8 socket head cap screws 5.

[0025] The bearing sleeve 11 is provided with a ball bearing 10 and a thrust ball bearing 12. The ball bearing 10 is located on the left side of the bearing sleeve 11 and is mainly used to bear radial loads. The thrust ball bearing 12 is located on the right side of the bearing sleeve 11 and is mainly used to bear axial loads. The pipe joint 14 passes through the ball bearing 10 and the thrust ball bearing 12, and the main shaft 18 passes through the pipe joint 14 to ensure the smoothness and accuracy of the main shaft 18 during rotation and axial movement.

[0026] To prevent the bearings from falling off and being damaged, a first shaft elastic retaining ring 9 is provided on the left side of the ball bearing 10, and a second shaft elastic retaining ring 13 is provided on the right side of the thrust ball bearing 12.

[0027] To further improve the extension and retraction stability and reset accuracy of the cutting tool, a thrust rod 15 is provided on the right side of the thrust ball bearing 12. A slider 16 is provided at the end of the thrust rod 15. The slider 16 is sleeved on the spindle 18. A reset spring 17 is provided between the slider 16 and the push tube 6. The slider 16 and the push tube 6 are elastically connected through the reset spring 17. Through the elastic action of the reset spring 17, the slider 16 and the push tube 6 can maintain good contact and elastic connection during the extension and retraction of the cutting tool, ensuring the stability and reset accuracy of the cutting tool during the extension and retraction process.

[0028] The working principle of this utility model is as follows: After the product clamping is completed, the program starts, the spindle 18 rotates for machining, and the internal dimensions of the product are completed. The control system transmits an electrical signal to the cylinder 2. After receiving the signal, the center rod of the cylinder 2 moves forward 20mm under the action of pneumatic force. The U-shaped frame 8 and the center rod of the cylinder 2 move synchronously under the connection of the M14 internal hexagonal joint. The spindle 18 and the U-shaped frame 8 are connected by the pipe joint 14 and locked with a nut. The pipe fitting 14 passes through the bearing mounted on the U-shaped frame 8. When the spindle 18 rotates, the pipe fitting 14 rotates within the bearing to prevent the U-shaped frame 8 from rotating. The bearing and the thrust ball bearing 12 are installed through the bearing sleeve 11, and both ends are fixed with the first shaft elastic retaining ring 9 and the second shaft elastic retaining ring 13, respectively. The bearing sleeve 11 and the U-shaped frame 8 are fixed with M6 internal hexagonal screws to ensure synchronous movement. When the U-shaped frame 8 moves forward, the thrust ball bearing 12 moves forward, and the thrust rod 15, which contacts the plane of the thrust ball bearing 12, pushes the slider 16 forward. The push tube 6 and the slider 16 are elastically connected by a restoring spring. When the slider 16 moves forward, the push tube 6 also moves accordingly. The push tube 6 is connected to the solid push rod inside the tool assembly 7, and the head of the solid push rod mates with the retractable cutter head. When the solid push rod moves forward, the retractable cutter head is pushed out, and under the action of the spindle 18 rotation, it begins to process the inner groove of the product. Under the instructions of the CNC program, after the groove is machined, the center rod of cylinder 2 moves back. The connecting piece moves backward, the telescopic tool retracts, the spindle 18 stops rotating, and the worker removes the product to prepare for the next clamping.

[0029] The entire operation requires only one product clamping by the employee, making it simple and highly precise. It can be widely used in the processing of various product series, greatly improving product efficiency and quality while saving costs.

[0030] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A composite cutting tool with an internal telescopic cutting head, characterized in that: The cylinder includes a cylinder bracket on its left side, the cylinder being fixed to the side of the cylinder bracket, a center rod at the output end of the cylinder, and a U-shaped bracket at the end of the center rod, the U-shaped bracket being fixedly connected to the center rod by an M14 hexagon socket screw. The U-shaped frame contains a main spindle, and the outside of the main spindle is provided with a pipe joint. The main spindle and the U-shaped frame are connected through the pipe joint. A push tube is sleeved on the outside of the main spindle, and a tool assembly is inserted through the push tube. The tool assembly is connected to the end of the main spindle.

2. The composite cutting tool with an internal telescopic cutting head according to claim 1, characterized in that: The U-shaped frame is provided with a bearing sleeve at one end near the main shaft. The bearing sleeve is engaged in the U-shaped frame and the bearing sleeve is fixedly connected to the U-shaped frame by an M8 hexagon socket screw. The bearing sleeve is equipped with a ball bearing and a thrust ball bearing. The ball bearing is located on the left side of the bearing sleeve, and the thrust ball bearing is located on the right side of the bearing sleeve. The pipe joint passes through the ball bearing and the thrust ball bearing, and the main shaft passes through the pipe joint.

3. The composite cutting tool with an internal telescopic cutting head according to claim 2, characterized in that: The ball bearing has a first shaft elastic retaining ring on its left side, and the thrust ball bearing has a second shaft elastic retaining ring on its right side.

4. The composite cutting tool with an internal telescopic cutting head according to claim 3, characterized in that: A thrust rod is provided on the right side of the thrust ball bearing, and a slider is provided at the end of the thrust rod. The slider is sleeved on the main shaft, and a return spring is provided between the slider and the push tube. The slider and the push tube are elastically connected through the return spring.

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