A tool bar for processing ultra-long deep hole cavities

Abstract

A tool rod for processing extra-long deep hole cavities, in order to solve the problem that existing ordinary equipment cannot process extra-long deep hole parts with "small mouth and big belly", cannot guarantee the roughness of the inner hole wall, has low processing efficiency, high labor cost, and requires the use of expensive special equipment and tools to ensure that the inner hole is processed to the qualified size in one time. The lathe slide box of the present invention is provided with a tool rod fixing seat, a tool rod, a tool head, a cone, a five-inch three-jaw chuck, a tool block, a tool block base, and a tightening block; a transition sleeve, a threaded sleeve, a pull rod is provided in the threaded sleeve, and a modified clamping jaw is provided on the five-inch three-jaw chuck. The present invention has a simple structure, low cost, is easy for workers to operate, and has good shock resistance and control effects; it solves the problem that lathe equipment cannot process extra-long deep hole parts with "small mouth and big belly", and improves the processing qualification rate; it solves the problems that dimensional tolerance is difficult to control and roughness does not meet the standards, saves the labor cost of subsequent grinding, and improves production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of mechanical processing, and in particular relates to a tool rod for processing an ultra-long deep hole cavity. Background Art

[0002] In the current machining industry, boring inner holes is the most common processing method. The inner holes that need to be processed are also various. Conventional lathe equipment is only suitable for processing through holes or stepped holes with large openings. For deep hole step parts with a length of more than 500mm, such as Figure 1 As shown, a special boring bar needs to be customized.

[0003] The traditional processing method is to use a boring bar with a processing depth greater than 1 / 2 of its length, adopt a head-turning clamping method, and process from both end faces to the inside. The problem encountered in this processing method is that the bar has a large overhang length, and the tool tip will cause "cutting" due to the radial reaction force of the workpiece. To ensure the qualified size, it is necessary to repeatedly measure the processing dimensions of the workpiece and continuously adjust the tool compensation value. This compensation value will form a ring-shaped tool mark in the middle of the part cavity after the head-turning processing due to factors such as tool wear, inconsistent radial force, and clamping errors. Removing this tool mark requires a lot of labor costs, and it is difficult to guarantee dimensional tolerances and roughness, which reduces product quality and even causes the part to be scrapped.

[0004] Therefore, it is necessary to design a tool specifically for processing ultra-long deep hole cavity parts to solve the unqualified problems caused by processing, reduce costs and improve efficiency. Figure 2 This is a composition diagram of the patented tool bar of this invention after being installed on a lathe equipment. Summary of the Invention

[0005] In order to solve the problem that existing ordinary equipment cannot process extra-long deep hole parts with "small mouth and big belly", conventional processing methods cannot guarantee the roughness of the inner hole wall, and the processing efficiency is low and the labor cost is high. It is necessary to use expensive special equipment and tools to ensure that the inner hole is processed to the qualified size in one time.

[0006] The technical means of the patented invention is: a tool bar for processing an ultra-long deep hole cavity, comprising a lathe slide box, a tool bar fixing seat provided on the lathe slide box, a tool bar provided on the tool bar fixing seat, a tool bar provided on the tool bar fixing seat, a tool head provided at the front end of the tool bar, and further comprising a cone, a connecting flange, a five-inch three-jaw chuck, a tool block, a tool block base, and a tightening block;

[0007] A transition sleeve is provided in the tool rod, a threaded sleeve is provided in the transition sleeve, a pull rod is provided in the threaded sleeve, a locking nut is provided at one end of the tool rod, and the threaded sleeve and the locking nut are connected with each other in a cooperative manner;

[0008] One end of the pull rod is connected to the cone, and the tool rod is connected to the five-inch three-jaw chuck through a connecting flange. The five-inch three-jaw chuck is provided with a modified clamping jaw, and the modified clamping jaw is connected to the tool mounting block base, and the tool mounting block base is connected to the tool mounting block;

[0009] A support block is provided on the outside of the knife-mounting block, a steel ball is provided in the support block, a filling block is provided above the steel ball in the support block; a tightening block is provided above the filling block, and the tightening block is in contact with the cone;

[0010] A cutter head is provided on the top of the cutter block.

[0011] The knife rod is a hollow structure.

[0012] The overhang length of the knife bar is adjustable.

[0013] The knife bar is 2500 mm long.

[0014] The position of the cutter head can be changed by adjusting the position of the cone.

[0015] The modified claw is a square structure as a whole, and sawtooth structures are provided on two adjacent sides of the square structure.

[0016] The contact surface between the cutter head and the cutter block is a 90-degree sawtooth groove.

[0017] The advantages of the patent of this invention are: a tool rod for processing extra-long deep hole cavities, which uses a hollow rod and a pull rod to lock each other as the main structure, has a simple structure, low cost, is easy for workers to operate, and has good shock resistance and control effects; it solves the problem that lathe equipment cannot process extra-long deep hole "small mouth and big belly" type parts, and improves the processing qualification rate of such parts; it solves the problem that dimensional tolerances are difficult to control and roughness does not meet the standards, saves the labor cost of workers' subsequent polishing, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of a typical "small mouth and big belly" type part;

[0019] Figure 2 This is a structural diagram of the tool of the present invention installed on a lathe device;

[0020] Figure 3 This is a structural installation diagram of the tool bar fixing seat of the present invention;

[0021] Figure 4 is a cross-sectional view of the tool body structure of the present invention;

[0022] Figure 5 It is an enlarged view of part A of the tool body structure diagram of the present invention;

[0023] Figure 6It is a three-dimensional structural diagram of the tool of the present invention;

[0024] Figure 7 It is a structural diagram of the cutter head portion of the tool of the present invention;

[0025] Figure 8 It is a schematic diagram of the use of the cutting tool of the present invention;

[0026] Figure 9 It is a processing schematic diagram of the tool of the present invention;

[0027] Figure 10 This is a schematic diagram of the optimization of the modified jaws of the present invention;

[0028] Figure 11 This is a schematic diagram of the connection of the cutter head of the present invention;

[0029] Explanation of the accompanying symbols: 1. Threaded sleeve; 2. Locking nut; 3. Tool arbor fixing seat; 4. Transition sleeve; 5. Lathe slide box; 6. Tool arbor; 7. Pull rod; 8. Connecting flange; 9. Cone; 10. Five-inch three-jaw chuck; 11. Tool block base; 12. Tool block; 13. Support block; 14. Clamping block; 15. Tool head; 16. Filling block; 17. Modified jaw; 18. Hexagon socket head screw M10×20; 19. Hexagon socket head screw M8×20; 20. Hexagon socket head screw M8×25; 21. Flat washer; 22. Stainless steel spring washer; 23 Steel ball. DETAILED DESCRIPTION

[0030] like Figures 2 to 10 As shown: The present invention provides a tool bar for machining an extra-long deep hole cavity, comprising a lathe slide box 5, a tool bar fixing seat 3 provided on the lathe slide box 5, a tool bar fixing seat 3 provided with a tool bar 6, a tool head 15 provided at the front end of the tool bar 6, a cone 9, a connecting flange 8, a five-inch three-jaw chuck 10, a tool mounting block 12, a tool mounting block base 11, and a tightening block 14;

[0031] A transition sleeve 4 is provided in the tool rod 6, a threaded sleeve 1 is provided in the transition sleeve 4, a pull rod 1 is provided in the threaded sleeve 1, a locking nut 2 is provided at one end of the tool rod 6, and the threaded sleeve 1 and the locking nut 2 are connected to each other in a cooperative manner;

[0032] One end of the pull rod 1 is connected to the cone 9, and the tool bar 6 is connected to the five-inch three-jaw chuck 10 through the connecting flange 8. The five-inch three-jaw chuck 10 is provided with a modified jaw 17. The modified jaw 17, such as Figure 10, the claws on the original five-inch three-jaw chuck 10 are machined to obtain a square structure, the modified claws 17 are locked with the tool mounting block base 11 with screws M and welded, and the tool mounting block base 11 is connected to the tool mounting block 12; then the welded modified claws 17 are assembled into the five-inch three-jaw chuck 10, and the adjustment function of the cutter head 15 is realized by utilizing the linkage of the modified claws 17 in the five-inch three-jaw chuck 10; a support block 13 is provided on the outside of the tool mounting block 12, a steel ball 23 is provided in the support block 13, and a filling block 16 is provided above the steel ball 23 in the support block 13; a tightening block 14 is provided above the filling block 16, and the tightening block 14 is in contact with the cone 9;

[0033] A cutter head 15 is provided at the top of the cutter block 12 .

[0034] The contact surface between the cutter head 15 and the cutter block 12 is designed as a 90-degree sawtooth groove. Figure 11 As shown, the structure has a tight fit and firm contact, which can effectively prevent the vibration of the cutter head during processing.

[0035] The knife rod 6 is a hollow structure.

[0036] The overhang length of the knife bar 6 is adjustable.

[0037] The knife bar 6 is 2500 mm long.

[0038] The position of the cutter head 15 can be changed by adjusting the position of the cone 9 .

[0039] The modified claw 17 is a square structure as a whole, and a sawtooth structure is provided on two adjacent sides of the square structure.

[0040] The tool mounting block 12 and the tool mounting block base 11 of the cutter head 15 are connected to the modified clamping claw 17, and the telescopic adjustment of the cutter head 15 is realized by the linkage of the five-inch three-jaw chuck 10. The extension or retraction of the cutter head 15 is adjusted by the three-jaw key equipped with the five-inch three-jaw chuck 15; after the adjustment is completed, loosen the locking nut 2 and rotate the threaded sleeve 1. The external thread of the threaded sleeve 1 and the internal thread of the transition sleeve 4 interact with each other to realize axial movement. The threaded sleeve 1 drives the pull rod 7, and the pull rod 7 is connected to the top cone 9, and finally realizes the axial movement of the cone 9 inside the cutter head 15; rotate the threaded sleeve 1 to make the tightening block 14 at the bottom of the tool mounting block 12 contact with the cone 9, and tighten the locking nut 2 after contact is achieved, which plays a role in reinforcing and stabilizing the cutter head 15 during the movement of the entire tool rod 6.

[0041] like Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 As shown:

[0042] exist Figure 2In the process, first, the processed parts are clamped firmly on the ordinary lathe equipment. Parts with a length of more than 2000mm need to be fixed with a center frame to ensure that the rotation and jump of the parts after clamping meet the process requirements; secondly, the installation of the tool bar fixing seat 3 requires the removal of the original tool holder on the lathe slide box 5, and threaded holes are drilled according to the mounting holes of the tool bar fixing seat 3. Then, the tool bar fixing seat 3 is installed on the lathe slide box 5, and the center height is adjusted so that the center of the tool bar 6 is in the same line with the center of the machine tool spindle; finally, the overhang length of the tool bar 6 is adjusted, and the screws on the tool bar fixing seat 3 are loosened so that the tool bar 6 can slide freely in the axial direction. Within the travel range of the lathe, the overhang length of the tool bar 6 is greater than the depth of the hole of the processed part. After calculating the overhang length, tighten the screws on the tool bar fixing seat 3. After the above operations are completed, the installation of the tool bar 6 is completed.

[0043] After the tool bar 6 is fixed, the parts can be processed. Figure 8 , an inner hole is pre-machined on the end face of the workpiece to facilitate the entry of the tool rod 6. The specific operating steps are as follows: ①, first install the commonly used diamond blades in the three blade slots of the cutter head 15 respectively; ②, after the blades are fixed, use the three-claw key to retract the cutter head 15 to a diameter smaller than the pre-machined hole, and then feed the tool rod 6 to the starting position of the processing depth; ③, use the three-claw key to unscrew the cutter head 15. At this time, control the five-inch three-claw chuck 10 to allow the cutter head 15 to cut to the predetermined cutting amount; ④, loosen the locking nut 2, pull the threaded sleeve 1, adjust the cone 9, make the support block 14 fully contact with the cone 9, and then tighten the locking nut 2, so that the cutter head 15 can maintain stable operation during cutting; ⑤, control the lathe The feed speed of the lathe slide box 5. At this time, you should pay attention to the operation of the tool, clean up the iron chips in time, keep the tool running smoothly, and feed the tool rod 6 to the end position of the depth of the hole to be processed; ⑥, retract the tool, control the feed speed of the lathe slide box 5, and retract the tool rod 6 to the starting position of the inner hole cavity; ⑦, repeat the operation steps ③ to ⑥ until the inner hole diameter meets the requirements specified in the drawing, and then go to the next step; ⑧, withdraw the cutter head 15 to the starting position of the inner hole cavity, and then use the three-claw key to retract the cutter head 15 to a range smaller than the hole diameter, control the lathe slide box 5, and make the tool rod 6 completely withdraw to the outside of the inner hole, and the part processing is completed.

[0044] The present invention has a simple structure, low cost, is easy for workers to operate, and has good shock resistance and control effects; it solves the problem that lathe equipment cannot process extra-long deep hole "small mouth and large belly" type parts, and improves the processing qualification rate of such parts; it solves the problems of difficult control of dimensional tolerances and substandard roughness, saves the labor cost of workers' subsequent grinding, and improves production efficiency.

Claims

1. A tool bar for machining an extra-long deep hole cavity, comprising a lathe slide box (5), a tool bar fixing seat (3) provided on the lathe slide box (5), a tool bar (6) provided on the tool bar fixing seat (3), a tool head (15) provided at the front end of the tool bar (6), and characterized in that: It also includes a cone (9), a connecting flange (8), a five-inch three-jaw chuck (10), a tool mounting block (12), a tool mounting block base (11), and a tightening block (14); A transition sleeve (4) is provided in the tool rod (6), a threaded sleeve (1) is provided in the transition sleeve (4), a pull rod (7) is provided in the threaded sleeve (1), a locking nut (2) is provided at one end of the tool rod (6), and the threaded sleeve (1) and the locking nut (2) are connected to each other in a cooperative manner; One end of the pull rod (7) is connected to the cone (9), and the tool rod (6) is connected to the five-inch three-jaw chuck (10) through a connecting flange (8). The five-inch three-jaw chuck (10) is provided with a modified clamping claw (17), and the modified clamping claw (17) is connected to the tool mounting block base (11), and the tool mounting block base (11) is connected to the tool mounting block (12); A support block (13) is provided on the outside of the knife-mounting block (12), a steel ball (23) is provided in the support block (13), and a filling block (16) is provided above the steel ball (23) in the support block (13); a tightening block (14) is provided above the filling block (16), and the tightening block (14) is in contact with the cone (9); The top end of the knife-mounting block (12) is provided with a knife head (15).

2. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The knife rod (6) is a hollow structure.

3. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The overhang length of the knife rod (6) is adjustable.

4. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The knife bar (6) is 2500 mm long.

5. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The position of the cutter head (15) can be changed by adjusting the position of the cone (9).

6. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The modified claw (17) is a square structure as a whole, and sawtooth structures are provided on two adjacent sides of the square structure.

7. The tool bar for machining an ultra-long deep hole cavity according to claim 1, characterized in that: The contact surface between the cutter head (15) and the cutter block (12) is a 90-degree sawtooth groove.

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