WO2021238032A1

WO2021238032A1 - Pneumatic automatic impelling device for lathe machining

Info

Publication number: WO2021238032A1
Application number: PCT/CN2020/122432
Authority: WO
Inventors: 陶国正; 虞文武; 万文龙; 蔡福海; 周春雷; 刘伟; 周辉锋
Original assignee: 常州机电职业技术学院
Priority date: 2020-05-27
Filing date: 2020-10-21
Publication date: 2021-12-02
Also published as: CN111482839B; CN111482839A

Abstract

A pneumatic automatic impelling device for lathe machining, comprising a base (1), a middle positioning mechanism provided in the middle of an upper end of the base (1), a driving guide mechanism provided on a left side of the base (1) and a driven guide mechanism provided on a right side of the base (1). The middle positioning mechanism is composed of a middle sliding base (2), a sliding assembly (3), lifting air cylinders (4) and a positioning plate (5); the driving guide mechanism is composed of a lug base (6), an impelling assembly (7) and a driving assembly (8); and the driven guide mechanism is composed of a lug base (6), a impelling assembly (7) and a driven assembly (9). According to the device, the quick replacement of a workpiece to be machined at a machining position is completed by controlling the lifting cylinder (4), the impelling assembly (7) and the sliding assembly (3). The production process is not delayed, and the working efficiency is improved.

Description

Pneumatic automatic propulsion device for lathe processing

Technical field

The invention relates to the technical field of mechanical processing, in particular to a pneumatic automatic propulsion device for lathe processing.

Background technique

Turning processing is a commonly used processing method in mechanical processing. Shaft outer circle processing is the most common processing method in turning processing. When large shafts are processed on a lathe, the shaft needs to be lifted first, and then left and right on the lathe Align the head and tail, use the top cone to push it tightly before processing. This processing method is relatively simple, but it still has the following shortcomings in actual use:

1. When processing multiple large shafts, the shafts that need to be processed need to be hoisted and positioned one by one. The entire operation process takes a long time and increases the cost of man-hours;

2. When using hoisting and positioning, the two ends of the shaft need to be aligned with the top cone on the head and tail of the lathe. The operation process requires certain technical requirements, which requires a higher level of operation technology for the operator, so there is a problem for the operator More restrictive;

3. During the process of positioning the shaft before processing and processing the back part, most of its operations are performed at the processing position. Therefore, during this period, the processing position cannot be processed, resulting in a certain waste of resources.

For this reason, a pneumatic automatic propulsion device for lathe processing is proposed.

Summary of the invention

The purpose of the present invention is to provide a pneumatic automatic propulsion device for lathe processing to solve the problems raised in the background art.

In order to achieve the above objectives, the present invention provides the following technical solutions: a pneumatic automatic propulsion device for lathe processing, including a base, an intermediate positioning mechanism arranged in the middle of the upper end of the base, a driving guide mechanism arranged on the left side of the upper end of the base, and the right side of the upper end of the base According to the driven guide mechanism, a middle driving groove is opened in the middle of the base, and radial sliding grooves are symmetrically opened on the left and right sides of the middle driving groove. The side of the radial sliding groove is on the upper end surface of the base. Symmetrically equipped with axial chute;

The intermediate positioning mechanism is composed of an intermediate sliding seat, a sliding assembly provided at the lower end of the intermediate sliding seat, a lifting cylinder arranged symmetrically at the upper end of the intermediate sliding seat, and a positioning plate fixedly connected to the upper end of the lifting cylinder;

The driving guide mechanism is composed of an ear seat on the left side of the middle sliding seat, a propulsion component on the left side of the ear seat, and a driving component on the upper end of the ear seat;

The driven guide mechanism is composed of an ear seat on the right side of the middle sliding seat, a propulsion component on the right side of the ear seat, and a driven component on the upper end of the ear seat.

Preferably, a seat plate is provided at the lower end of the intermediate sliding seat, and sliding blocks I that are slidably fitted with radial sliding grooves are provided symmetrically on the left and right sides of the bottom of the seat plate.

Preferably, the sliding assembly is composed of a driving cylinder fixedly installed in the middle of the middle driving groove and a pneumatic lap plate arranged symmetrically on the left and right sides of the driving cylinder, and the pneumatic lap plate is fixed to the ends of the piston rods at both ends of the driving cylinder. Connected, the front and rear ends of the seat plate are fixedly provided with magnetic attraction lap boards at positions relative to the pneumatic lap board, and electromagnetic attraction blocks are fixedly embedded in the magnetic attraction lap board.

Preferably, the lower end of the lifting cylinder is fixedly connected to the upper end surface of the seat plate by bolts, and the upper end of the lifting cylinder is fixedly connected to the lower end of the positioning plate by bolts.

Preferably, the upper end surface of the positioning plate is evenly provided with positioning guide grooves, and the guidance of the positioning guide grooves corresponds to the guide of the axial sliding grooves.

Preferably, the propulsion assembly is composed of a propulsion cylinder fixedly installed on the side surface of the fixed seat and the fixed seat, and the end of the piston rod of the propulsion cylinder is fixedly connected with the outer side surface of the ear seat by bolts.

Preferably, the upper end of the ear seat is provided with a bearing hole, and the lower end of the ear seat is symmetrically provided with two sliding blocks II that are slidably matched with the axial sliding groove.

Preferably, the middle of the drive assembly is provided with a drive shaft fitted with the bearing hole through the bearing, and a drive turntable is fixedly connected to the inner end surface of the drive shaft, and the front end of the drive turntable is provided with a tapered structure for positioning Connecting groove I, and a driving top cone is inserted into the positioning connecting groove I, and the driving top cone is fixedly connected to the bottom of the positioning connecting groove I by bolts.

Preferably, a motor mounting seat is fixedly installed on the outer side of the driving shaft and at the outer opening of the bearing hole, and a driving motor is fixedly installed on the end surface of the motor mounting seat. The outer ends are fixedly connected by a coupling.

Preferably, the middle of the driven assembly is provided with a driven rotating shaft fitted with the bearing hole through the bearing, and a driven rotating disk is fixedly connected to the inner end surface of the driven rotating shaft, and the front end of the driven rotating disk is provided with The positioning connecting groove II of the conical surface structure is inserted with a driven top cone in the positioning connecting groove II, and the driven top cone is fixedly connected to the bottom of the positioning connecting groove II by bolts.

Preferably, the bearing holes at the upper ends of the ear seats on both sides of the intermediate sliding seat are kept coaxial, and the driven tip cone and the driving tip cone are kept coaxial with the bearing holes, respectively.

Compared with the prior art, the beneficial effects of the present invention are:

1. When using this device to turn multiple large shaft workpieces, multiple workpieces can be placed in the positioning guide groove at the upper end of the positioning plate at one time, and then the two ends of the workpiece can be positioned by controlling the sliding assembly, the lifting cylinder and the propulsion assembly Fixed, saving time and labor during the entire operation process, improving processing efficiency;

2. When positioning the two ends of a large shaft workpiece on this device, the sliding assembly can be controlled to link the intermediate sliding seat to move the workpiece on the positioning plate to the middle position, and then the center of the workpiece can be raised to the same position by controlling the lifting cylinder The height of the bearing hole is coaxial, the whole operation is realized by mechanical action, the positioning process is less time-consuming, and the accuracy is high;

3. When the shaft is processing or withdrawing parts during processing, the lifting cylinder can be controlled to reset and rise, so that the workpiece fits the positioning guide groove body, and then control the push assembly to withdraw, drop the workpiece on the positioning guide groove, and then control The sliding assembly links the intermediate sliding seat to move the workpiece to be processed in the positioning guide groove to the middle, and controls the advancing assembly to make the driving cone and the driven cone tighten the workpiece to be processed, thereby completing the positioning of the workpiece to be processed, and then controlling the lifting The cylinder is lowered, and then the sliding assembly is controlled to move the processed workpiece to the non-processing station for processing. The whole process does not delay the production process, so the utilization rate of the machine tool is higher and the machining efficiency is higher.

Description of the drawings

Figure 1 is an axonometric side view of the overall structure of the present invention;

Figure 2 is a front view of the overall structure of the present invention;

Figure 3 is a cross-sectional structural view at A-A in Figure 2;

Figure 4 is a right side view of the overall structure of the present invention;

Fig. 5 is a cross-sectional structural view at B-B in Fig. 4.

In the figure: 1. Base; 2. Middle sliding seat; 3. Sliding assembly; 4. Lifting cylinder; 5. Positioning plate; 6. Ear seat; 7. Propulsion assembly; 8. Drive assembly; 9. Driven assembly; 101. Middle drive groove; 102. Radial chute; 103. Axial chute; 201. Seat plate; 202. Magnetic lap board; 203. Electromagnetic suction block; 204. Slider I; 301. Drive cylinder; 302. Pneumatic lap plate; 501. Positioning guide groove; 601. Bearing hole; 701. Fixing seat; 702. Propelling cylinder; 801. Drive shaft; 802. Drive turntable; 803. Drive top cone; 804. Motor mounting seat; 805, drive motor; 901, driven shaft; 902, driven turntable; 903, driven top cone.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to Figures 1-5, the present invention provides a technical solution:

A pneumatic automatic propulsion device for lathe processing, comprising a base 1, an intermediate positioning mechanism provided in the middle of the upper end of the base 1, a driving guide mechanism provided on the upper left side of the base 1, and a driven guide mechanism provided on the upper right side of the base 1. A middle drive groove 101 is opened in the middle of the base 1, and radial slide grooves 102 are symmetrically opened on the left and right sides of the middle drive groove 101. The sliding groove 103, where the base 1 plays a supporting and guiding role with respect to the intermediate positioning mechanism, the driving guide mechanism and the driven guiding mechanism, wherein the radial sliding groove 102 and the axial sliding groove 103 can be processed into T-shaped grooves; The intermediate positioning mechanism is composed of an intermediate sliding seat 2, a sliding assembly 3 arranged at the lower end of the intermediate sliding seat 2, a lifting cylinder 4 arranged symmetrically at the upper end of the intermediate sliding seat 2 and a positioning plate 5 fixedly connected to the upper end of the lifting cylinder 4, middle positioning The main function of the mechanism is to realize the lifting and back-and-forth displacement of the workpiece at the upper middle position of the base 1; the driving and guiding mechanism is composed of the ear seat 6 provided on the left side of the middle sliding seat 2, the propulsion assembly 7 provided on the left side of the ear seat 6 and the ear The upper end of the seat 6 is composed of a drive assembly 8. The main function of the drive guide mechanism is to tighten the right end surface of the workpiece and provide rotational power support for the workpiece; 6. The pusher assembly 7 provided on the right side of the ear seat 6 and the driven module 9 provided on the upper end of the ear seat 6 are formed. The main function of the driven guide mechanism is to tighten the left end surface of the workpiece and provide rotational support.

Further, the upper end surface of the positioning plate 5 is uniformly provided with positioning guide grooves 501, and the guidance of the positioning guide groove 501 is the same as that of the axial sliding groove 103. Here, the positioning guide groove 501 can be selected as a V-shaped groove. The shaft workpiece has an automatic centering function. According to the actual carrying capacity, the number of positioning guide grooves 501 at the upper end of the positioning plate 5 is set, and the number of positioning guide grooves 501 determines the number of shaft workpieces that can be placed at the same time. The propulsion assembly 7 is composed of a fixed seat 701 and a propulsion cylinder 702 fixedly installed on the side of the fixed seat 701. The end of the piston rod of the propulsion cylinder 702 is fixedly connected with the outer surface of the ear seat 6 by bolts, and the propulsion cylinder 702 is activated. The telescopic rod and the ear seat 6 move along the guide of the axial sliding groove 103, thereby realizing the clamping and loosening of the workpiece. The upper end of the ear seat 6 is provided with a bearing hole 601, and the lower end of the ear seat 6 is symmetrically provided with two sliding blocks II that are slidably fitted with the axial sliding groove 103. Here, the bearing hole 601 is opposite to the drive assembly 8, from The movable assembly 9 plays a role of a rotation support, and the axial sliding groove 103 plays a role of guiding the ear seat 6.

More specifically, the lower end of the intermediate sliding seat 2 is provided with a seat plate 201, and on the left and right sides of the bottom of the seat plate 201, there are symmetrically provided sliders I 204 that are slidably fitted with the radial sliding grooves 102, and the seat plate 201 is a pair of lifting cylinders. 4. The positioning plate 5 functions as a support. Through the sliding fit of the radial sliding groove 102 and the sliding block I 204, the intermediate sliding seat 2 can move forward and backward along the upper end of the base 1 guided by the radial sliding groove 102, thereby controlling The upper workpiece of the positioning plate 5 is in the front and rear orientation in the middle. At the same time, the sliding assembly 3 is composed of a driving cylinder 301 fixedly installed in the middle of the middle driving groove 101 and a pneumatic lap plate 302 symmetrically arranged on the left and right sides of the driving cylinder 301. The pneumatic lap plate 302 and the ends of the piston rods at both ends of the driving cylinder 301 Fixedly connected, the front and rear ends of the seat plate 201 are fixedly provided with a magnetic lap plate 202 at the position relative to the pneumatic lap plate 302, and an electromagnetic suction block 203 is fixedly embedded in the magnetic lap plate 202, where the drive The cylinder 301 is a two-way double-headed cylinder. The electromagnetic block 203 can be selected as a P-120/120/30 type electromagnet. The connecting plate 302 is fixed or separated from the magnetic overlapping plate 202, and the drive cylinder 301 is activated to connect the electromagnetic attraction block 203 on one side of the seat plate 201, and the electromagnetic attraction block 203 on the other side is disconnected, and the cylinder 301 on the same side is driven The pneumatic lap board 302 and the electromagnetic suction block 203 are sucked and fixed, and the pneumatic lap board 302 on the other side is separated from the electromagnetic suction block 203, and the pneumatic lap board 302 and the electromagnetic suction block 203 that are attracted to each other are controlled to move to realize the middle The sliding seat 2 moves to one side along the guide of the radial sliding groove 102.

At the same time, the lower end of the lifting cylinder 4 is fixedly connected to the upper end surface of the seat plate 201 by bolts, and the upper end of the lifting cylinder 4 is fixedly connected to the lower end of the positioning plate 5 by bolts. This structure is convenient for the intermediate sliding seat 2, the lifting cylinder 4, and the positioning plate. 5 Quick disassembly and transportation between.

Further, the middle of the drive assembly 8 is provided with a drive shaft 801 fitted with the bearing hole 601 through the bearing, and the drive shaft 801 can rotate around the inner wall of the bearing hole 601 through the bearing, and is fixedly connected at the inner end surface of the drive shaft 801 There is a driving turntable 802. The front end of the driving turntable 802 is provided with a positioning connecting groove I with a tapered structure, and a driving top cone 803 is inserted into the positioning connecting groove I. The driving top cone 803 and the bottom of the positioning connecting groove I are passed through bolts In a fixed connection, when the cone tip of the driving cone 803 is excessively worn and needs to be replaced, loosening the bolt connecting the driving cone 803 and the bottom of the positioning connection groove I can quickly remove the driving cone 803 from the front end of the driving turntable 802. A motor mounting seat 804 is fixedly installed on the outer side of the driving shaft 801 and at the outer opening of the bearing hole 601, and a driving motor 805 is fixedly installed on the end surface of the motor mounting seat 804, the main shaft of the driving motor 805 and the driving shaft 801 The outer end of the drive motor 805 is fixedly connected by a coupling. The main shaft of the drive motor 805 is connected to the drive shaft 801, the drive turntable 802 and the drive top cone 803 to rotate, and the drive top cone 803 and the driven top cone 903 rotate. The tightened shaft to be machined can rotate along with it.

In addition, the middle of the driven assembly 9 is provided with a driven rotating shaft 901 fitted with the bearing hole 601 through the bearing, and a driven rotating disk 902 is fixedly connected to the inner end surface of the driven rotating shaft 901, and the front end of the driven rotating disk 902 is opened The positioning connection groove II with a tapered surface structure, and a driven top cone 903 is inserted into the positioning connection groove II, and the driven top cone 903 is fixedly connected with the bottom of the positioning connection groove II by bolts. When the driven top cone When the 903 cone tip is excessively worn and needs to be replaced, loosen the bolt connecting the driven top cone 903 and the bottom of the positioning connecting groove II to quickly remove the driven top cone 903 from the front end of the driven turntable 902.

At the same time, the bearing holes 601 at the upper ends of the ear seats 6 on both sides of the intermediate sliding seat 2 are kept coaxial, and the driven tip cone 903 and the driving tip cone 803 are kept coaxial with the bearing hole 601 respectively. The bearing holes are ensured during the manufacturing process of the entire device 601. The coaxiality between the driven top cone 903 and the driving top cone 803 can make the workpiece rotate smoothly between the driving top cone 803 and the driven top cone 903, and at the same time ensure the turning accuracy of the outer circle of the workpiece.

The working principle of the present invention:

When working, first start the advancing cylinder 702 to retract to make the ear seat 6 with the driving assembly 8 and the driven assembly 9 move a distance away from both sides of the intermediate sliding seat 2 along the axial sliding groove 103, and then stop the advancing cylinder 702, and then The shaft workpieces to be processed are hoisted into the positioning guide groove 501 at the upper end of the positioning plate 5 one by one, and the driving cylinder 301 is activated to magnetically attract the electromagnetic block 203 in the overlapping plate 202 on one side of the seat plate 201, while holding the other of the seat plate 201 The electromagnetic suction block 203 in the side magnetic attraction lap plate 202 is in a closed state, so that the pneumatic lap plate 302 on the side of the drive cylinder 301 is attracted to the electromagnetic attraction block 203. When the drive cylinder 301 is controlled to expand and contract to one side, The pneumatic lap plate 302 and the intermediate sliding seat 2 are synchronized to one side. When the intermediate sliding seat 2 and the positioning plate 5 are moved to the middle position and the bearing hole 601 in the positioning guide groove 501 at the upper end of the axis to be processed, they are in the same vertical section , Turn off the drive cylinder 301, and then control the expansion and contraction of the lifting cylinder 4 to raise the shaft center of the shaft workpiece at the upper end of the positioning plate 5 to a height coaxial with the bearing hole 601, pause the lifting cylinder 4, and start the propulsion cylinder 702 to extend forward. The ear seat 6 is connected with the driving assembly 8 and the driven assembly 9 to move toward the center along the axial sliding groove 103. When the driving cone 803 and the driven cone 903 push the workpiece on the upper end of the positioning plate 5 tightly, it stops and advances. Cylinder 702, start the lifting cylinder 4 to retract, move other shaft workpieces to be processed down to a certain height, and after the positioning guide groove 501 is completely separated from the workpieces tightened between the driving assembly 8 and the driven assembly 9, control the driving cylinder 301 drives the intermediate sliding seat 2 to move the workpiece on the upper end of the positioning plate 5 back and forth. After the workpiece is moved out of the processing position, the lathe is started to turn the workpiece. When the workpiece is processed, the driving cylinder 301 and the lifting cylinder 4 are first driven to position The plate 5 is moved up to the position of the finished shaft, so that the positioning guide groove 501 fits the outer circle of the finished workpiece, and then the advancing cylinder 702 is controlled to retract, so that the driving top cone 803 and the driven top cone 903 are two of the finished workpiece. Then the drive cylinder 301 is controlled to translate the upper end of the positioning plate 5 to the shaft center of the bearing hole 601, and the advancing cylinder 702 is started to extend, so that the driving top cone 803 and the driven top cone 903 will separate the workpiece to be processed. The end is tightened, so far, the installation of the second shaft to be processed and the withdrawal of the first processed shaft are completed. From before processing to after processing, there is no need for extra hoisting actions during the entire processing process. The mobile replacement positioning is completely realized by this device. It saves time and labor, improves the utilization rate of the lathe, and improves the efficiency of positioning and installation.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A pneumatic automatic propulsion device for lathe processing, comprising a base (1), an intermediate positioning mechanism arranged in the middle of the upper end of the base (1), a driving guide mechanism arranged on the left side of the upper end of the base (1), and the upper right side of the base (1) The provided driven guide mechanism is characterized in that: a middle driving groove (101) is opened in the middle of the base (1), and radial sliding grooves (102) are symmetrically opened on the left and right sides of the middle driving groove (101). ), the side surface of the radial sliding groove (102) and the upper end surface of the base (1) are symmetrically provided with axial sliding grooves (103);

The intermediate positioning mechanism is composed of an intermediate sliding seat (2), a sliding assembly (3) arranged at the lower end of the intermediate sliding seat (2), a lifting cylinder (4) and a lifting cylinder arranged symmetrically at the upper end of the intermediate sliding seat (2) (4) Consists of a positioning plate (5) fixedly connected at the upper end;

The driving guide mechanism consists of an ear seat (6) provided on the left side of the middle sliding seat (2), a propulsion component (7) provided on the left side of the ear seat (6), and a driving component provided on the upper end of the ear seat (6) (8) Composition;

The driven guide mechanism consists of an ear seat (6) provided on the right side of the middle sliding seat (2), a propulsion component (7) provided on the right side of the ear seat (6), and a follower provided on the upper end of the ear seat (6). The moving assembly (9) constitutes.
The pneumatic automatic propulsion device for lathe processing according to claim 1, characterized in that: the lower end of the intermediate sliding seat (2) is provided with a seat plate (201), and the bottom left and right sides of the seat plate (201) A sliding block I (204) that is symmetrically provided with the radial sliding groove (102) is slidably matched.
The pneumatic automatic propulsion device for lathe processing according to claim 2, characterized in that: the sliding assembly (3) consists of a driving cylinder (301) and a driving cylinder (301) fixedly installed in the middle of the middle driving groove (101). 301) The pneumatic lap plates (302) are symmetrically arranged on the left and right sides, and the pneumatic lap plates (302) are fixedly connected to the ends of the piston rods at both ends of the driving cylinder (301). The front and back of the seat plate (201) A magnetic lap board (202) is fixed at the positions of the two ends relative to the pneumatic lap board (302), and an electromagnetic suction block (203) is fixedly embedded in the magnetic lap board (202).
The pneumatic automatic propulsion device for lathe processing according to claim 2, characterized in that: the lower end of the lifting cylinder (4) is fixedly connected with the upper end surface of the seat plate (201) by bolts, and the lifting cylinder (4) The upper end of) is fixedly connected with the lower end of the positioning plate (5) through bolts.
The pneumatic automatic propulsion device for lathe processing according to claim 1, characterized in that: the upper end surface of the positioning plate (5) is evenly provided with positioning guide grooves (501), and the positioning guide grooves (501) The guidance of) corresponds to the guidance of the axial sliding groove (103).
The pneumatic automatic propulsion device for lathe processing according to claim 1, characterized in that: the propulsion assembly (7) is composed of a fixed seat (701) and a propulsion cylinder (702) fixedly mounted on the side of the fixed seat (701) , The end of the piston rod of the propulsion cylinder (702) and the outer surface of the ear seat (6) are fixedly connected by bolts.
A pneumatic automatic propulsion device for lathe processing according to claim 1, characterized in that: the upper end of the ear seat (6) is provided with a bearing hole (601), and the lower end of the ear seat (6) is provided symmetrically. There are two sliding blocks II that are slidably matched with the axial sliding grooves (103).
The pneumatic automatic propulsion device for lathe processing according to claim 7, characterized in that: the middle of the driving assembly (8) is provided with a driving shaft (801) that is matched with the bearing hole (601) through the bearing, And a drive turntable (802) is fixedly connected to the inner end surface of the drive shaft (801). The front end of the drive turntable (802) is provided with a positioning connection groove I with a tapered structure, and a positioning connection groove I is inserted in the positioning connection groove I The top cone (803) is driven, and the top cone (803) is fixedly connected to the bottom of the positioning connecting groove I by bolts.
The pneumatic automatic propulsion device for lathe processing according to claim 8, characterized in that: a motor mounting seat ( 804), and a drive motor (805) is fixedly installed on the end surface of the motor mounting seat (804), and the main shaft of the drive motor (805) is fixedly connected with the outer end of the drive shaft (801) through a coupling.
The pneumatic automatic propulsion device for lathe processing according to claim 7, characterized in that: the middle of the driven assembly (9) is provided with a driven shaft (901) that is matched with the bearing hole (601) through the bearing. ), and a driven turntable (902) is fixedly connected to the inner end surface of the driven rotating shaft (901). A driven top cone (903) is inserted into the II, and the driven top cone (903) is fixedly connected to the bottom of the positioning connecting groove II by bolts.
The pneumatic automatic propulsion device for lathe processing according to claim 8 or 10, characterized in that the bearing holes (601) at the upper ends of the ear seats (6) on both sides of the intermediate sliding seat (2) remain coaxial, And the driven tip cone (903) and the driving tip cone (803) are kept coaxial with the bearing hole (601) respectively.