Bar material internal thread turning tool for numerical control lathe

Abstract

The utility model discloses a bar turning internal thread tool for a numerical control lathe, and belongs to the technical field of internal thread tools, the bar turning internal thread tool comprises the numerical control lathe and a three-jaw chuck, the top of the numerical control lathe is provided with a spindle box and a feeding box, the three-jaw chuck and an output shaft of the spindle box are fixedly installed, a reducing sleeve and a shaft body are arranged in the three-jaw chuck, and the shaft body is fixedly connected with the spindle box. The shaft body is fixedly installed at the output shaft end of the spindle box, a blind hole is formed in one end of the shaft body, one end of the variable-diameter sleeve is located in the blind hole, and the variable-diameter sleeve is in sliding connection with the blind hole. Through the sliding connection between the blind hole and the variable-diameter sleeve, the position of the variable-diameter sleeve in the three-jaw chuck can be transversely adjusted, so that one end of a workpiece fixed by the three-jaw chuck is in contact with the variable-diameter sleeve, and the depth of the end face of the workpiece can be controlled; and the screw tap can be prevented from touching the output shaft of the main shaft box through the reducing sleeve and the shaft body, so that a protection effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of internal thread tooling, and in particular to a tooling for turning internal threads of bars for CNC lathes. Background Art

[0002] CNC lathe is one of the most widely used CNC machine tools. It is mainly used for cutting inner and outer cylindrical surfaces of shaft parts or disk parts, inner and outer conical surfaces of arbitrary taper angles, complex rotating inner and outer curved surfaces, and cylindrical and conical threads. It can also perform grooving, drilling, reaming, reaming and boring, etc. The internal thread tooling is to fix the tap on the CNC lathe tool holder, fix the workpiece on the chuck and rotate it at a certain rotation speed to realize the internal thread tap of the workpiece.

[0003] The patent document with the published announcement number CN201799727U provides an internal thread processing device for a CNC lathe. In this published patent document, during the internal thread cutting process, the tool holder does not move and the tap is automatically fed. When the processing depth is sufficient, it only needs to be reversed and the tap can be automatically withdrawn. The tap will not be broken, and the production efficiency is high. However, in the above-mentioned patent document, the chuck needs to be fixed on the output shaft of the spindle box. When it is necessary to process a through-hole internal threaded hole, it is easy to touch the tool disc when turning to the innermost part, and the tap will also pass through the workpiece and touch the output shaft of the spindle box, and the tap cannot be protected. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present application provides a tooling for turning internal threads of bars for CNC lathes, which overcomes the deficiencies in the prior art and aims to solve the problems in the prior art.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a tooling for turning internal threads of bars on CNC lathes, comprising a CNC machine tool and a three-jaw chuck, wherein a spindle box and a feed box are respectively arranged on the top of the CNC machine tool, the three-jaw chuck is fixedly installed with the output shaft of the spindle box, a reducing sleeve and a shaft body are arranged inside the three-jaw chuck, the shaft body is fixedly installed on the output shaft end of the spindle box, and a blind hole is opened at one end of the shaft body, one end of the reducing sleeve is located inside the blind hole, and the reducing sleeve is slidably connected to the blind hole, a mounting piece is fixedly installed on the tool holder end of the feed box, and a tap is arranged on one side of the mounting piece.

[0006] By adopting the above technical solution, the sliding connection between the blind hole and the reducing sleeve can laterally adjust the position of the reducing sleeve inside the three-jaw chuck, so that one end of the workpiece fixed by the three-jaw chuck contacts the reducing sleeve, thereby controlling the depth of the workpiece end face. In addition, during the internal thread processing of the tap, the reducing sleeve and the shaft body can prevent the tap from touching the output shaft of the spindle box, thereby playing a protective role.

[0007] As a preferred technical solution of the present application, a mounting groove is provided on one side of the mounting member, a mounting shaft is fixedly connected to one end of the tap, sliding grooves are symmetrically provided on the top and bottom of the mounting groove, sliders are symmetrically fixedly connected to the top and bottom of the mounting shaft, the mounting shaft is located inside the mounting groove, and the mounting shaft is adapted to the mounting groove, the slider is located inside the sliding groove, and the slider is slidably connected to the sliding groove.

[0008] By adopting the above technical solution, the installation shaft is inserted into the interior of the installation groove, and the slider enters the interior of the slide groove, so that the tap can be quickly installed and is easy to use. When the workpiece is cut into an internal thread by the tap, the tap can only move laterally but cannot rotate due to the sliding between the slider and the slide groove, and the tap can continue to be screwed into the workpiece through the action of the thread.

[0009] As a preferred technical solution of the present application, the centers of the reducing sleeve and the shaft body and the center of the three-jaw chuck are in the same axial direction.

[0010] By adopting the above technical solution, the tap is prevented from touching the edge of the reducing sleeve and the shaft body.

[0011] As a preferred technical solution of the present application, the diameter of the reducing sleeve at the large diameter is the same as the diameter of the shaft body.

[0012] By adopting the above technical solution, the uniformity of the reducer sleeve and the shaft body is ensured.

[0013] As a preferred technical solution of the present application, one side of the slide groove adjacent to the opening of the installation groove is open.

[0014] By adopting the above technical solution, it is ensured that the slider can slide smoothly.

[0015] As a preferred technical solution of the present application, supporting feet are fixedly installed at the four corners of the bottom of the CNC machine tool, and anti-slip pads are provided at the bottom of the supporting feet.

[0016] By adopting the above technical solution, the stability of the CNC machine tool is increased.

[0017] Beneficial effects of this application:

[0018] 1. Through the sliding connection between the blind hole and the reducing sleeve, the position of the reducing sleeve inside the three-jaw chuck can be adjusted laterally, so that one end of the workpiece fixed by the three-jaw chuck contacts the reducing sleeve, and the depth of the workpiece end face can be controlled. In addition, during the internal thread processing of the tap, the reducing sleeve and the shaft body can prevent the tap from touching the output shaft of the spindle box, thereby playing a protective role.

[0019] 2. By inserting the installation shaft into the installation groove and allowing the slider to enter the groove, the tap can be quickly installed. It is easy to use. When the workpiece is cut into an internal thread by the tap, the tap can only move laterally but cannot rotate due to the sliding between the slider and the groove. The tap can be driven to continue to be screwed into the workpiece through the action of the thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 It is a schematic diagram of the structure of a three-jaw chuck from the side;

[0022] Figure 3 This is a schematic diagram of the structure of the reducer sleeve and the shaft body of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the tap and mounting parts of this application.

[0024] In the figure: 1. CNC machine tool; 2. three-jaw chuck; 3. tap; 4. mounting parts; 5. spindle box; 6. feed box; 7. support foot; 8. reducing sleeve; 9. shaft body; 10. blind hole; 11. mounting groove; 12. mounting shaft; 13. slide groove; 14. slider. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Reference Figure 1-3 The tooling for turning internal threads of bars for CNC lathes comprises a CNC machine tool 1 and a three-jaw chuck 2. A spindle box 5 and a feed box 6 are respectively arranged on the top of the CNC machine tool 1. The three-jaw chuck 2 is fixedly installed with the output shaft of the spindle box 5. A reducing sleeve 8 and a shaft body 9 are arranged inside the three-jaw chuck 2. The shaft body 9 is fixedly installed on the output shaft end of the spindle box 5, and a blind hole 10 is opened at one end of the shaft body 9. One end of the reducing sleeve 8 is located inside the blind hole 10, and the reducing sleeve 8 is slidably connected to the blind hole 10. A mounting member 4 is fixedly installed on the tool holder end of the feed box 6, and a tap 3 is arranged on one side of the mounting member 4.

[0027] When in use, the position of the reducing sleeve 8 inside the three-jaw chuck 2 can be adjusted laterally through the sliding connection between the blind hole 10 and the reducing sleeve 8, so that one end of the workpiece fixed by the three-jaw chuck 2 is in contact with the reducing sleeve 8, thereby controlling the depth of the workpiece end face. In addition, during the internal thread processing of the tap 3, the reducing sleeve 8 and the shaft body 9 can prevent the tap 3 from touching the output shaft of the spindle box 5, thereby playing a protective role.

[0028] Reference Figure 1 and Figure 4 A mounting groove 11 is provided on one side of the mounting member 4, a mounting shaft 12 is fixedly connected to one end of the tap 3, sliding grooves 13 are symmetrically provided at the top and bottom of the mounting groove 11, a slider 14 is symmetrically fixedly connected to the top and bottom of the mounting shaft 12, the mounting shaft 12 is located inside the mounting groove 11, and the mounting shaft 12 is adapted to the mounting groove 11, the slider 14 is located inside the slider 13, and the slider 14 is slidably connected to the slider 13.

[0029] When in use, the tap 3 can be quickly installed by inserting the installation shaft 12 into the installation groove 11 and allowing the slider 14 to enter the slide groove 13. The use is convenient. When the workpiece is cut into an internal thread by the tap 3, the tap 3 can only move laterally but cannot rotate due to the sliding between the slider 14 and the slide groove 13. The tap 3 can continue to be screwed into the workpiece through the action of the thread.

[0030] Reference Figure 2 and Figure 3 , the centers of the reducing sleeve 8 and the shaft body 9 are in the same axial direction as the center of the three-jaw chuck 2. When in use, the reducing sleeve 8, the shaft body 9 and the three-jaw chuck 2, whose centers are in the same axial direction, prevent the tap 3 from touching the edges of the reducing sleeve 8 and the shaft body 9.

[0031] Reference Figure 3 The diameter of the reducing sleeve 8 at the large diameter is the same as the diameter of the shaft body 9. When in use, the reducing sleeve 8 and the shaft body 9 with the same diameter are used to ensure uniformity.

[0032] Reference Figure 4 The side of the slide groove 13 near the opening of the mounting groove 11 is a perforated type. When in use, the slide block 14 can be ensured to slide smoothly through the perforated slide groove 13.

[0033] Reference Figure 1 The four corners of the bottom of the numerical control machine tool 1 are all fixedly installed with supporting feet 7, and the bottom of the supporting feet 7 is provided with anti-skid pads. When in use, the stability of the numerical control machine tool 1 is increased by the anti-skid pads provided at the bottom of the supporting feet 7.

[0034] Working principle: During use, first insert the installation shaft 12 into the interior of the installation groove 11, and make the slider 14 enter the interior of the slide groove 13, so that the quick installation of the tap 3 can be completed, and then the sliding connection between the blind hole 10 and the reducing sleeve 8 can be used to laterally adjust the position of the reducing sleeve 8 inside the three-jaw chuck 2, and then fix the workpiece to be processed with internal threads through the three-jaw chuck 2, so that one end of the workpiece fixed by the three-jaw chuck 2 contacts with the reducing sleeve 8, so that the end face depth of the workpiece can be controlled, and during the process of processing the internal threads of the tap 3, the reducing sleeve 8 and the shaft body 9 can prevent the tap 3 from touching the output shaft of the spindle box 5, thereby playing a protective role, and when the workpiece is cut into an internal thread by the tap 3, due to the sliding between the slider 14 and the slide groove 13, the tap 3 can only move laterally but cannot rotate, and the tap 3 can be driven to continue to be screwed into the workpiece through the action of the thread, so as to realize the processing of the internal thread of the workpiece, and finally the output shaft of the spindle box 5 is controlled to reverse, so that the tap 3 can be withdrawn from the workpiece.

[0035] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A tool for turning internal threads of bar stock for a CNC lathe, comprising a CNC machine tool (1) and a three-jaw chuck (2), characterized in that: A spindle box (5) and a feed box (6) are respectively arranged on the top of the CNC machine tool (1); the three-jaw chuck (2) is fixedly mounted on the output shaft of the spindle box (5); a reducing sleeve (8) and a shaft body (9) are arranged inside the three-jaw chuck (2); the shaft body (9) is fixedly mounted on the output shaft end of the spindle box (5); a blind hole (10) is opened at one end of the shaft body (9); one end of the reducing sleeve (8) is located inside the blind hole (10); the reducing sleeve (8) is slidably connected to the blind hole (10); a mounting member (4) is fixedly mounted on the tool holder end of the feed box (6); a tap (3) is arranged on one side of the mounting member (4).

2. The internal thread turning tool for bars for CNC lathes according to claim 1, characterized in that: A mounting groove (11) is formed on one side of the mounting member (4); a mounting shaft (12) is fixedly connected to one end of the tap (3); sliding grooves (13) are symmetrically formed on the top and bottom of the mounting groove (11); a sliding block (14) is symmetrically fixedly connected to the top and bottom of the mounting shaft (12); the mounting shaft (12) is located inside the mounting groove (11), and the mounting shaft (12) is matched with the mounting groove (11); the sliding block (14) is located inside the sliding groove (13), and the sliding block (14) is slidably connected to the sliding groove (13).

3. The internal thread turning tool for bars for CNC lathes according to claim 1, characterized in that: The centers of the reducing sleeve (8) and the shaft body (9) and the center of the three-jaw chuck (2) are in the same axial direction.

4. The internal thread turning tool for bars for CNC lathes according to claim 1, characterized in that: The diameter of the reducing sleeve (8) at the large diameter portion is the same as the diameter of the shaft body (9).

5. The internal thread turning tool for bars for CNC lathes according to claim 2, characterized in that: One side of the slide groove (13) adjacent to the opening of the mounting groove (11) is of an open hole type.

6. The internal thread turning tool for bars for CNC lathes according to claim 1, characterized in that: Support feet (7) are fixedly installed at the four corners of the bottom of the CNC machine tool (1), and anti-slip pads are provided at the bottoms of the support feet (7).

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