CN114055072A

CN114055072A - A knurling device for long rod parts

Info

Publication number: CN114055072A
Application number: CN202111550915.6A
Authority: CN
Inventors: 武耀德; 王洋; 王泽亮; 单彬; 李志新
Original assignee: Dalian Changfeng Industrial Corp
Current assignee: Dalian Changfeng Industrial Corp
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-02-18

Abstract

The invention discloses a knurling device for long-rod parts, and belongs to the technical field of mechanical manufacturing. The device comprises a support, a turntable pressing plate, a turntable seat, a guide sleeve, an ejector rod, a rotating shaft, a roller, a screw rod, a sliding nail and a square nut. The three groups of push rods and roller mechanisms are arranged and distributed at 120 degrees along the circumferential direction, when the screw rod is rotated, the square nut and the turntable base can be driven to rotate, the turntable base drives the guide sleeve and the push rods to rotate, and the rollers contract or expand towards the circle center direction simultaneously. Therefore, the extrusion forces exerted by the three rollers simultaneously point to the circle center, and the balance of the forces is achieved. The invention solves the problems of bending or deformation of parts caused by unbalanced stress in the knurling processing process, unqualified knurling depth, damage of parts and the like.

Description

Long-rod part knurling device

Technical Field

The invention belongs to the technical field of machine manufacturing, and relates to a tool used in a knurling process of a long rod part.

Background

In the field of machine manufacturing, the outer surfaces of some long rod parts (such as handles and operating levers) need to be knurled, so that the antiskid function is achieved. Knurling is typically accomplished by pressing with a knurling tool (see fig. 1) on a lathe.

As the knurling tool applies larger extrusion force on the surface of the part in the knurling process, straight grains or reticulate patterns can be formed on the surface of the part, and the knurling effect is achieved. The existing knurling tool is analyzed in terms of the force direction, and only the extrusion force F is applied in one direction (as shown in FIG. 2). The long rod type part is influenced by the extrusion force F due to poor rigidity of the long rod type part, and the long rod type part is easy to bend or deform, so that the knurling depth cannot meet the requirement, or the part is damaged.

In order to solve the problem of unidirectional stress of parts in the conventional knurling mode, further avoid bending or deformation of long-rod parts and achieve the purpose of improving the knurling effect and ensuring the completeness rate of the parts, the invention provides a knurling device for long-rod parts, which realizes the simultaneous application of extrusion forces in three directions (as shown in figure 3) to achieve extrusion force balance, has a supporting effect and effectively solves the problem of bending or deformation of the long-rod parts.

Disclosure of Invention

The invention provides a knurling device for long-rod parts, which aims to solve the problem that the existing knurling tool is unbalanced in stress.

The technical scheme of the invention is as follows:

a knurling device for long-rod parts comprises a support 1, a rotary table pressing plate 2, a rotary table base 3, a guide sleeve 5, a push rod 6, a rotating shaft 7, a roller 14, a screw rod 9, a sliding nail 15 and a square nut.

The support 1 is L-shaped, and the bottom of the support is provided with a mounting hole for fixing on a middle supporting plate of a lathe; three arc slides of edge circumferencial direction equipartition on the support 1, carousel seat 3 is connected with support 1 through slip nail 15, and carousel seat 3 can slide along the slide with slip nail 15, reaches the rotation effect.

Carousel clamp plate 2 and carousel seat 3 are the ring annular structure, and carousel clamp plate 2 passes through bolt 11 and nut 12 to be fixed on carousel seat 3. One end of the ejector rod 6 is connected with the support 1 through a rotating shaft 7, and the ejector rod 6 can rotate around the rotating shaft 7; the other end of the mandril 6 is connected with a roller 14 through a pin shaft 13, and the roller 14 can rotate around the pin shaft 13. The push rod 6 passes through the guide sleeve 5, and the push rod 6 and the guide sleeve 5 can move relatively. The upper surface and the lower surface of the guide sleeve 5 are respectively connected with the turntable pressing plate 2 and the turntable base 3 through shaft pins 4, and the guide sleeve 5 can rotate around the shaft pins 4. The push rod 6 mechanisms are arranged in three groups and distributed at 120 degrees along the circumferential direction.

The square nut A8 is hinged with the support 1, the square nut B10 is hinged with a lug of the turntable seat 3, the screw 9 penetrates through the square nut A8 and the square nut B10, and the screw 9 is rotated to drive the square nut B10 to move forwards (or backwards) along the screw 9, so that the turntable seat 3 is driven to rotate clockwise (or anticlockwise). When the turntable base 3 rotates, the guide sleeve 5 is driven to slide along the ejector rod 6, the ejector rod 6 rotates around the rotating shaft 7, and then the roller 14 contracts (or expands) towards the circle center direction, and knurling processing of long rod parts is achieved.

The method for knurling by adopting the knurling device comprises the following steps:

1) firstly, the knurling device is fixed on a lathe middle supporting plate through a mounting hole of a support 1, and the center height is adjusted, so that the center of the knurling device and the center of a lathe spindle are in the same straight line.

2) One end of the long rod type part to be knurled is clamped on the lathe chuck, and the other end of the long rod type part penetrates through the center of the knurling device, so that the roller 14 is aligned to the part needing knurling.

3) The screw rod 9 is rotated by an open spanner, so that the square nut B10 drives the turntable base 3 to rotate anticlockwise until the long rod type part is clamped.

4) And starting the lathe to drive the long rod part to rotate for 10-20 seconds, and finishing knurling.

5) The screw 9 is rotated reversely by the open spanner, so that the square nut B10 drives the turntable base 3 to rotate clockwise, namely, the long rod type parts are loosened.

6) And closing the lathe, and unloading the long rod part from the lathe chuck to finish the whole machining process.

The invention has the beneficial effects that: the knurling device for the long-rod parts is provided with three groups of ejector rods and roller mechanisms, the three groups of ejector rods and the roller mechanisms are distributed along the circumferential direction at 120 degrees, when the screw rod is rotated, the square nut and the turntable base can be driven to rotate, the turntable base drives the guide sleeve and the ejector rods to rotate, and then the rollers contract or expand towards the circle center direction simultaneously. Therefore, the extrusion forces exerted by the three rollers simultaneously point to the circle center, and the balance of the forces is achieved. The invention solves the problems of bending or deformation of parts caused by unbalanced stress in the knurling processing process, unqualified knurling depth, damage of parts and the like.

Drawings

Fig. 1 is a schematic structural view of a conventional knurling tool.

Fig. 2 is a schematic view of a force analysis of a conventional knurling tool.

Fig. 3 is a schematic view of a force analysis of the knurling device of the present invention.

Fig. 4 is a schematic front view of the knurling device of the present invention.

Fig. 5 is a schematic view of the back structure of the knurling device of the present invention.

In the figure: 1, a support; 2, pressing a plate by a rotary table; 3, a turntable seat; 4, shaft pins; 5, a guide sleeve; 6, a top rod; 7, a rotating shaft; 8, a square nut A; 9, a screw rod; 10 square nuts B; 11, bolts; 12 a nut; 13, a pin shaft; 14 rollers; 15 sliding the pin.

Detailed Description

The following examples and drawings are included to further illustrate the embodiments of the present invention and are not intended to limit the invention thereto.

As shown in fig. 3-4, a knurl device for long rod type parts comprises a support 1, a turntable press plate 2, a turntable base 3, a guide sleeve 5, a mandril 6, a rotating shaft 7, a roller 14, a screw 9, a sliding nail 15 and a square nut.

Support 1 is the L shape, and the bottom sets up the mounting hole and is used for fixing on the layer board of lathe, along three arc slide of circumferencial direction equipartition on the support 1, and carousel seat 3 is connected with the three arc slide of support 1 through slip nail 15, and carousel seat 3 can slide along the slide with slip nail 15, reaches the rotation effect.

The turntable press plate 2 is fixed on the turntable base 3 through a bolt 11 and a nut 12. One end of the ejector rod 6 is connected with the support 1 through a rotating shaft 7, and the ejector rod 6 can rotate around the rotating shaft 7; the other end of the ejector rod 6 is connected with a roller 14 through a pin shaft 13, and the roller 14 can rotate around the pin shaft 13; the push rod 6 passes through the guide sleeve 5, and the push rod 6 and the guide sleeve 5 can move relatively. The guide sleeve 5 is respectively connected with the turntable pressing plate 2 and the turntable base 3 through a shaft pin 4, and the guide sleeve 5 can rotate around the shaft pin 4. Three groups of push rod 6 mechanisms are distributed along the circumferential direction at 120 degrees.

The square nut A8 is hinged with the support 1, the square nut B10 is hinged with the lug of the turntable seat 3, the screw 9 penetrates through the square nut A8 and the square nut B10, and the screw 9 is rotated to drive the square nut B10 to move forwards (or backwards) along the screw 9, so that the turntable seat 3 is driven to rotate. When the turntable base 3 rotates, the guide sleeve 5 is driven to slide along the ejector rod 6, the ejector rod 6 rotates around the rotating shaft 7, and then the roller 14 contracts (or expands) towards the circle center direction, and knurling processing of long rod parts is achieved.

Claims

1. A knurling device for long-rod parts, characterized in that the device comprises a support (1), a turntable pressure plate (2), a turntable seat (3), a guide sleeve (5), an ejector rod (6), a rotating shaft (7), roller (14), screw (9), sliding nail (15) and square nut;

The support (1) is L-shaped, and three arc-shaped slideways are evenly distributed along the circumferential direction. The nail (15) can slide along the slide;

The turntable pressing plate (2) is fixed on the turntable seat (3); one end of the ejector rod (6) is connected with the support (1) through a rotating shaft (7), and the ejector rod (6) can rotate around the rotation shaft 7; the ejector rod (6) ) the other end passes through the guide sleeve (5), and is connected to the roller (14) through the pin (13), the roller (14) can rotate around the pin (13); the guide sleeve (5) is connected by the shaft pin (13). 4) It is respectively connected with the turntable pressing plate (2) and the turntable seat (3), and the guide sleeve (5) can rotate around the shaft pin (4); the ejector rod (6) mechanism is arranged in three groups, which are distributed along the circumferential direction at 120°;

The two square nuts are hinged with the lugs of the support (1) and the turntable seat (3) respectively, the screw rod (9) passes through the two square nuts, and the rotating screw rod (9) drives one of the square nuts to move along the screw rod, thereby driving the turntable The seat (3) rotates; when the turntable seat (3) rotates, the guide sleeve (5) is driven to slide along the ejector rod (6), so that the ejector rod (6) rotates around the rotating shaft (7), thereby making the roller (14) move toward the center of the circle The direction shrinks or expands to realize the knurling of long rod parts.

2. A knurling device for long rod parts according to claim 1, characterized in that, a mounting hole is provided at the bottom of the support (1) for installing the knurling device on the middle pallet of a lathe, so as to realize Auxiliary support for the knurling process of long rod parts to avoid bending or deformation of long rod parts.