CN112643150A

CN112643150A - Semi-automatic thread grinding device for lathe

Info

Publication number: CN112643150A
Application number: CN201910957270.4A
Authority: CN
Inventors: 温海军; 安建飞; 安志飞; 李伟; 李凤英; 高文铎; 李吉东; 赵海亮; 梁志强; 王宝宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2021-04-13

Abstract

The invention discloses a semi-automatic thread grinding device which is driven by a lathe and is convenient to operate and applied to the field of machining, and is mainly characterized in that a spring outer cylinder of the thread grinding device is driven by an eccentric wheel to lift, a grinding cutter head and a workpiece thread are always engaged with proper force by adjusting a spring, an outer box body moves forwards by the rotation of the workpiece when the device works, so that a return spring is compressed, a handle is rotated to separate a gear from a rack when the thread grinding is finished, the grinding cutter head returns to an initial position under the action of the return spring to carry out the grinding operation of the next period, the initial position of the outer box body can be changed by adjusting a cutter rest, the size range of the ground workpiece is expanded, a worker only needs to rotate the eccentric wheel and the handle in the whole grinding process, the safety of the device is improved, and the grinding can be repeated when one-time grinding of one workpiece does, the grinding device is flexible, convenient, time-saving and labor-saving, and the power system used by the grinding device is a lathe, so that the grinding device is economical and practical.

Description

Semi-automatic thread grinding device for lathe

Technical Field

The invention relates to a semi-automatic thread grinding device for a lathe, in particular to a semi-automatic thread grinding device which is driven by the lathe in the field of machining and has a stable structure and convenient operation.

Background

The use of threads is very common in the field of machine design and manufacture. In recent years, with the continuous improvement of the whole industrial level, the requirement on the quality of the thread in the industry is higher and higher, and after the machining is finished, in order to ensure the surface smoothness of the thread surface, further grinding and polishing operations are needed. However, the thread grinding operation is mainly manually completed by a bench worker at present, and although special grinding equipment is available in the market, the grinding equipment is expensive, complex to operate and high in investment cost, and is difficult to burden for small enterprises.

Disclosure of Invention

The invention aims to provide a semi-automatic thread grinding device for a lathe, which has the advantages of stable structure, high automation degree and convenience in operation.

The technical problem to be solved by the invention is realized by the following structure: grind tool bit, spring inner tube, spring urceolus, regulating spring, eccentric wheel, slide rail, outer box, lathe guide rail, hollow rod, rack, guide bar, reset spring, one-way ratchet, gear, pinion carrier, mandrel, handle, support fixed plate, knife rest, characterized by: the automatic thread grinding device is characterized in that a workpiece is driven by a common machine tool to rotate, the grinding device automatically grinds threads, a cutter rest fixing plate is fixed on a cutter rest, the initial position of an outer box body is changed by adjusting the position of the cutter rest on a machine tool guide rail, a support of the device is fixed with the cutter rest fixing plate, a gear and a one-way ratchet wheel are coaxial and are connected with the support through a gear carrier, the gear carrier can rotate around a mandrel by rotating a handle, so that the gear and a rack are in a meshed or separated state, a knife grinder is fixed on an inner spring cylinder, an adjusting spring is arranged between the inner spring cylinder and an outer spring cylinder, an eccentric wheel is arranged below the outer spring cylinder, when the knife grinder is required to be meshed with the threads, the eccentric wheel is rotated anticlockwise to enable the outer spring cylinder to be lifted, when the knife grinder is required to be separated from, install on outer box in the lump, install reset spring between hollow rod and the knife rest fixed plate, install the guide bar of fixing on the knife rest fixed plate in the reset spring, the guide bar is concentric with the interior circle of hollow rod, and the interior circle diameter of hollow rod is greater than the diameter of guide bar, when screw thread grinding device operation, screw thread and the meshing of whetting a knife on the work piece, thereby the outer box of drive moves right along the lathe guide rail, hollow rod compresses reset spring along the guide bar, simultaneously through the one-way ratchet of rack and pinion structure drive rotation, when a polishing cycle of screw thread is over, it makes and grinds tool bit and screw thread separation to rotate the eccentric wheel, it makes the separation of wheel and rack, the outer box gets back to initial position under reset spring's effect, carry out the operation of polishing of next cycle.

The working principle of the invention is as follows: a semi-automatic thread grinding device for lathe is composed of a grinding head fixed to the internal spring tube, a regulating spring between said internal spring tube and external spring tube for engaging the grinding head with workpiece, an eccentric wheel for driving said external spring tube to move up or down, a tool rest with a position varying from that of said grinding head, a gear engaged with rack, a grinding head engaged with workpiece, a machine tool for rotating workpiece, an external casing moving forward along the guide track of machine tool, and a restoring spring for compressing it, and starting the grinding operation of the next workpiece.

The invention has the advantages that: a semi-automatic thread grinding device for lathe features that the grinding head is pressed on workpiece by spring for engaging it with the thread of workpiece with proper force, the external screw tube is raised or lowered by eccentric wheel, and the self-locking performance of eccentric wheel can make the external screw tube always at a predefined height and not lowered, and the initial position of grinding device is changed by changing the follower rest, resulting in wider size range of workpiece, and the grinding head is engaged with the tail end of screw thread, is easy to obtain in small and medium-sized enterprises, and is economical and practical.

The following is described in further detail by way of example in conjunction with the accompanying drawings:

fig. 1 is a schematic structural view of a semi-automatic thread grinding device for a lathe.

In the figure:

the device comprises a chuck 1, a workpiece 2, a knife sharpening head 3, a spring inner cylinder 4, a spring outer cylinder 5, an adjusting spring 6, an eccentric wheel 7, a slide rail 8, an outer box 9, a machine tool guide rail 10, a hollow rod 11, a rack 12, a guide rod 13, a return spring 14, a one-way ratchet 15, a gear 16, a gear rack 17, a mandrel 18, a handle 19, a bracket 20, a bracket fixing plate 21 and a machine tool rest 22.

Detailed Description

As shown in figure 1, a sharpener head 3 and a spring inner cylinder 4 of a semi-automatic thread grinding device for a lathe are fixed together, an adjusting spring 6 is arranged between the spring inner cylinder 4 and the spring outer cylinder 5, the spring outer cylinder 5 is driven to lift by an eccentric wheel 7 below the spring inner cylinder, the sharpener head 3, the spring inner cylinder 4, the spring outer cylinder 5, the adjusting spring 6 and the eccentric wheel 7 are arranged in an outer box body 9 together, a slide rail 8 is arranged below the outer box body 9, the slide rail 8 is contacted with a machine tool guide rail 10, a hollow rod 11 is fixedly connected on the outer box body 9, a rack 12 is fixed on the hollow rod 11, a cutter rest fixing plate 21 is arranged on a lathe cutter rest 22, a bracket 20 is fixedly connected on the cutter rest fixing plate 21, a one-way ratchet 15 and a gear 16 are coaxially arranged on a gear frame 17, the gear frame 17 can rotate around a mandrel 18 by rotating a handle 19, the initial position of, when the thread grinding device works, a workpiece 2 is firstly installed on a chuck 1, an eccentric wheel 7 is rotated anticlockwise to enable a spring outer cylinder 5 to be lifted, a knife sharpening head 3 is engaged with threads of the workpiece 2, the engaging force of the threads of the knife sharpening head 3 and the workpiece 2 is kept moderate through an adjusting spring 6, a gear 16 is engaged with a rack 12 through a rotating handle 19, then a machine tool is started to enable the workpiece 2 to rotate, so that an outer box body 9 is driven to slide forwards along a machine tool guide rail 10 through the threads on the workpiece 2, further the return spring 14 is compressed along the guide rod 13, when one workpiece is ground, the eccentric wheel 7 is rotated clockwise to enable the spring outer cylinder 5 to descend to enable the knife sharpening head 3 to be separated from the workpiece 2, the handle 19 is rotated to enable the gear 16 to be separated from the rack 12, the outer box body 9 is moved backwards through the hollow rod 11 under the action of the reset spring 14, the outer box body returns to an initial position, the workpiece is replaced to repeat previous actions, the polishing operation of the next period is started, the polishing operation of each workpiece is completed, workers only need to rotate the eccentric wheel and the handle, safety, reliability, time saving and labor saving are achieved, meanwhile, the workpiece can be polished repeatedly when the expected effect is not achieved in one-time polishing, flexibility and convenience are achieved, and a power system used by the polishing device is an ordinary lathe, and is economical and practical.

Claims

1. The utility model provides a semi-automatic screw thread grinding device for lathe, is including grinding tool bit, spring inner tube, spring urceolus, adjusting spring, eccentric wheel, slide rail, outer box, lathe guide rail, hollow rod, rack, guide bar, reset spring, one-way ratchet, gear, pinion carrier, mandrel, handle, support fixed plate, knife rest, its structural feature is: the thread grinding device is characterized in that a workpiece is driven by a lathe to rotate, a grinding cutter head is meshed with the thread of the workpiece, a cutter frame fixing plate is fixed on a cutter frame of the lathe, a gear and a one-way ratchet wheel are coaxial and are connected with a support through a gear frame, the gear frame can rotate around a mandrel by rotating a handle, the gear and a rack are meshed or separated, a grinding cutter head is fixed on an inner spring cylinder, an adjusting spring is arranged between the inner spring cylinder and an outer spring cylinder, an eccentric wheel is arranged below the outer spring cylinder, the outer spring cylinder is lifted by rotating the eccentric wheel, so that the clutch state of the grinding cutter head and the thread of the workpiece is changed, a hollow rod and the rack are fixed together and are arranged on an outer box body, a return spring is arranged between the hollow rod and the cutter frame fixing plate, a guide rod fixed, thereby the outer box of drive is along lathe guide rail forward movement, hollow rod compresses reset spring along the guide bar, simultaneously through the one-way ratchet rotation of rack and pinion mechanism drive, when the cycle of polishing of screw thread ended, it makes and grinds tool bit and screw thread separation to rotate the eccentric wheel, because one-way ratchet can not the antiport this moment, make the head of whetting a knife stop in the set position motionless, it makes wheel and rack separation to rotate the handle, the initial position is got back to outer box under reset spring's effect, carry out the operation of polishing of next cycle.

2. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: the thread grinding device is driven by the lathe to rotate a workpiece.

3. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: the spring outer cylinder drives the spring outer cylinder to lift through an eccentric wheel and is self-locked to a set height during working.

4. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: an adjusting spring is arranged between the spring inner cylinder and the spring outer cylinder.

5. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: and a return spring is arranged between the hollow rod and the knife rest fixing plate, and after the gear and the rack are separated, the outer box body returns to the initial position under the action of the return spring.

6. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: the gear and the one-way ratchet wheel are coaxial, and the gear rack can rotate around the mandrel by rotating the handle, so that the gear and the rack are meshed or separated.

7. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: the tool rest fixing plate is fixed on a tool rest of the lathe.

8. The semi-automatic thread grinding device for the lathe according to claim 1, wherein: when the grinding device works, the box body above the machine tool guide rail is driven by the rotating workpiece to move forwards.