Center follow rest for automatic pulling machining of slender shaft

Abstract

The utility model discloses a center follow rest for automatic pulling machining of a slender shaft, and relates to the technical field of lathe machining. The follow rest structurally comprises a follow rest body mounted on a middle supporting plate of a lathe, three telescopic supports are distributed and mounted on the follow rest body in a regular triangle shape; the telescopic support is connected and fixed through a first shank bolt; the telescopic support comprises a guide seat mounted on the follow rest body, and a pressure head in rolling connection fit with the slender shaft is linearly inserted into one end of the guide seat; the other end of the guide seat is in threaded penetrating connection with a long adjusting bolt with a handle; a spring is installed in the guide base and abuts against the pressing head. According to the utility model, the follow rest body is arranged on the middle supporting plate of the lathe, and the three telescopic supports are distributed and arranged in a regular triangle shape; by adjusting the telescopic support, the device can adapt to slender shafts with different diameters, and the universality of the device is improved; meanwhile, the follow rest has the advantages of being simple in structure, flexible and convenient to adjust and the like, and is suitable for being popularized and used in slender shaft machining operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of lathe processing, in particular to a central follower tool holder for automatic material drawing processing of a slender shaft. Background Art

[0002] In the field of mechanical processing, the processing of slender shafts has always been a technical problem. Due to the large ratio of the length to the diameter of the slender shaft, it is very easy to vibrate and deform during the processing, which affects the processing accuracy and surface quality. In order to solve this problem, a tool holder is usually used to support and guide the slender shaft. If the tool holder takes a long time to position and adjust the slender shaft, it will have a great impact on the processing efficiency. Among them, the utility model patent with the authorization announcement number CN201371251Y is a sleeve-type tool holder, which has a small range of application and is relatively complicated to manufacture and install.

[0003] In order to solve the above problems, the utility model provides a central follower tool holder for automatic material drawing processing of a slender shaft. Utility Model Content

[0004] The utility model aims to provide a central tool rest for automatic drawing processing of slender shafts. The tool rest body is installed on a center support plate of a lathe, and three telescopic supports are installed in a regular triangle distribution. Centering is fast and convenient, and the device can adapt to slender shafts of different diameters, thereby improving the versatility of the device.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a central tool rest for automatic material drawing processing of a slender shaft, comprising a tool rest body installed on a center support plate of a lathe; three telescopic supports are installed on the tool rest body in a regular triangle arrangement; the telescopic supports are connected and fixed by first bolts with handles; the telescopic supports comprise a guide seat installed on the tool rest body; a pressure head which is linearly plugged and fitted with a rolling connection with the slender shaft is installed at one end of the guide seat; a long adjustment bolt with a handle is threadedly penetrated and connected at the other end of the guide seat; a spring is installed inside the guide seat, and the spring abuts against the pressure head.

[0007] As a preferred technical solution of the utility model, the tool holder body includes a C-shaped circular ring plate; three radially arranged first circular through holes are evenly distributed on the outer ring surface of the C-shaped circular ring plate; a first rectangular guide groove is axially symmetrically provided on the inner wall of the first circular through hole; three first threaded holes that are connected to the first circular through holes and connected to the first handle bolts are provided on the side of the C-shaped circular ring plate; supporting vertical plates extending toward each other are fixed on the side of the C-shaped circular ring plate; two second threaded holes are provided on the supporting vertical plates.

[0008] As a preferred technical solution of the utility model, the guide seat includes a cylinder; a second rectangular guide groove is opened at one end of the cylinder; the spring is placed at the bottom of the second rectangular guide groove; a rectangular guide protrusion that cooperates with the first rectangular guide groove is integrally formed on the outer wall of the same end of the cylinder axially symmetrically; a third threaded hole that is connected to the second rectangular guide groove is opened at the other end of the cylinder; the third threaded hole is threadedly connected to the handle adjustment long bolt.

[0009] As a preferred technical solution of the utility model, the pressure head includes a rectangular rod that slides with the second rectangular guide groove; a waist-shaped long groove is provided on one side wall of the rectangular rod; a fourth threaded hole connected to the second rectangular guide groove is provided on the outer wall of the cylinder; a second handle bolt is threadedly connected to the fourth threaded hole, and the end of the second handle bolt is placed in the waist-shaped long groove; two single ears are installed at the free end of the rectangular rod; a bearing is installed between the two single ears through a pin and a buckle.

[0010] As a preferred technical solution of the utility model, a row of circular grooves is provided on one of the rectangular guide protrusions.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model uses three telescopically supported pressure heads to evenly clamp and position the slender shaft. The follower tool holder is installed on the center support plate of the lathe. The tool moves with the movement during the movement, realizing follow-up support, improving the stability of the turning process, and can effectively reduce the vibration and deformation of the slender shaft during the processing, thereby improving the accuracy of the turning process.

[0013] 2. The utility model adapts to slender shafts of different diameters by adjusting the handle adjustment bolt, so that the tool holder body can be suitable for processing slender shafts of different diameter ranges, increasing the versatility of the device; the design of the first handle bolt screwed into the circular groove allows the position of the pressure head to be quickly adjusted, saving time for changing tools or adjusting the device; the telescopic support can be adjusted by simple thread rotation, which is convenient for the operator to quickly adjust the clamping force and position according to actual needs.

[0014] 3. The utility model prevents the axial deflection of the telescopic support through the design of the rectangular guide groove and the rectangular guide protrusion, thereby ensuring the stability and reliability of the telescopic support.

[0015] 4. When turning is completed, the utility model can realize automatic material pulling through the elastic force provided by the spring, thereby improving work efficiency and reducing labor costs.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the central follower tool holder for automatic drawing processing of slender shafts according to the utility model.

[0019] Figure 2 It is a structural schematic diagram of the tool holder body.

[0020] Figure 3 It is a structural schematic diagram of the telescopic support.

[0021] Figure 4 Schematic diagram of the axial section of the telescopic support.

[0022] Figure 5 Schematic diagram of the structure of the guide seat.

[0023] Figure 6 It is a schematic diagram of the structure of the pressure head.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-tool holder body, 2-telescopic support, 3-first handle bolt, 11-C-shaped circular ring plate, 12-first round through hole, 13-first rectangular guide groove, 14-first threaded hole, 15-support vertical plate, 16-second threaded hole, 21-guide seat, 22-pressure head, 23-handle adjustment long bolt, 24-spring, 25-second handle bolt, 211-cylinder, 212-second rectangular guide groove, 213-rectangular guide protrusion, 214-third threaded hole, 215-fourth threaded hole, 216-circular groove, 221-rectangular rod, 222-waist long groove, 223-single ear, 224-bearing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment one:

[0028] See also Figure 1-6As shown, the utility model is a central tool rest for automatic drawing of slender shafts, comprising a tool rest body 1 mounted on a center support plate of a lathe. Three telescopic supports 2 are mounted on the tool rest body 1 in a regular triangle arrangement. The telescopic supports 2 are connected and fixed by first shank bolts 3.

[0029] The tool rest body 1 specifically includes a C-shaped annular plate 11. Three radially arranged first circular through holes 12 are evenly distributed on the outer ring surface of the C-shaped annular plate 11. The inner wall of the first circular through hole 12 is axially symmetrically provided with a first rectangular guide groove 13. The side of the C-shaped annular plate 11 is provided with three first threaded holes 14 that are connected to the first circular through holes 12 and connected and matched with the first handle bolt 3. A supporting vertical plate 15 extending toward each other is fixed to the side of the C-shaped annular plate 11. Two second threaded holes 16 are provided on the supporting vertical plate 15. The supporting vertical plate 15 is fixed to the support plate in the lathe by bolts, and the pressure head 22 on the tool rest body 1 is placed on one side of the turning tool and moves with the movement of the turning tool. The first rectangular guide groove 13 provided on the inner wall of the first circular through hole 12 can prevent the axial deflection of the telescopic support 2.

[0030] The telescopic support 2 includes a guide seat installed on the tool holder body 1. A pressure head 22 that is rollingly connected to the slender shaft is installed at one end of the guide seat 21 in a linear plug-in manner. A handle adjustment bolt 23 is threadedly connected to the other end of the guide seat 21. A spring 24 is installed inside the guide seat 21, and the spring 24 abuts against the pressure head 22. The guide seat 21 includes a cylinder 211. A second rectangular guide groove 212 is provided at one end of the cylinder 211. The spring 24 is placed at the bottom of the second rectangular guide groove 212. A rectangular guide protrusion 213 that cooperates with the first rectangular guide groove 13 is integrally formed on the outer wall of the same end of the cylinder 211 in an axially symmetrical manner. A third threaded hole 214 that is connected to the second rectangular guide groove 212 is provided at the other end of the cylinder 211. The third threaded hole 214 is threadedly connected to the handle adjustment bolt 23. The pressure head 22 includes a rectangular rod 221 that is slidingly matched with the second rectangular guide groove 212. A waisted long groove 222 is provided on one side wall of the rectangular rod 221. A fourth threaded hole 215 connected to the second rectangular guide groove 212 is provided on the outer wall of the cylinder 211. A second handle bolt 25 is connected to the inner thread of the fourth threaded hole 215, and the end of the second handle bolt 25 is placed in the waisted long groove 222. At this time, the spring 24 is in a compressed state, and the compression elastic force provided by it is sufficient to position the highly rotating slender shaft in the minimum state. Two single ears 223 are installed at the free end of the rectangular rod 221. A bearing 224 is installed between the two single ears 223 through a pin and a buckle. The axis of the bearing 224 is parallel to the axis of the slender shaft, and the bearing 224 is in rolling connection with the surface of the slender shaft.

[0031] The structural design of the pressure head 22 and the guide seat 21 and the second handle bolt 25 accessories limit the effective use range of the pressure head 22, which is convenient for direct judgment in the process of clamping the slender shaft.

[0032] When the telescopic support 2 is in use, the free end of the slender shaft is first fixed coaxially by the tailstock top, and then the three handle adjustment bolts 23 at the tail of the telescopic support 2 are adjusted respectively until the end of the handle adjustment bolt 23 is pressed against the end of the pressure head 22. The three pressure heads 22 perform axial positioning on the follower part of the slender shaft, and then each handle adjustment bolt 23 is rotated in the opposite direction for half a circle to meet the allowable initial surface roughness of the slender shaft and the runout between the bearings 224. Under the action of the spring 24, the three pressure heads 22 remain in place. While the three bearings 224 position the slender shaft, they roll with the slender shaft at high speed during the movement of the support plate in the lathe. The elastic force of the spring 24 provides the clamping and positioning force. When the turning is completed and the slender shaft is ready to be pulled out for the remaining processing, the three-turn chuck on the lathe is released and the support plate in the lathe is moved. The three pressure heads 22 clamp the slender shaft under the elastic force of the spring 24 to achieve automatic material pulling.

[0033] The tool rest body 1 and the telescopic support 2 have simple and reliable structures, and are flexible and convenient to adjust, and are suitable for promotion and use in slender shaft processing operations.

[0034] One of the rectangular guide protrusions 213 is provided with a row of circular grooves 216. The first handle bolt 3 is screwed into the circular grooves 216 at different positions to adjust the distance between the pressure head 222 and the center line of the C-shaped circular ring plate 11 when the pressure head 222 is fully extended, that is, it is suitable for slender shafts of different diameter ranges, thereby improving the fine application range of the telescopic support 2.

[0035] In the description of the specification, the description of the reference terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A central tool rest for automatic drawing of slender shafts, characterized in that: It comprises a tool holder body (1) mounted on a center support plate of a lathe; three telescopic supports (2) are mounted on the tool holder body (1) in a regular triangle arrangement; the telescopic supports (2) are connected and fixed by first shank bolts (3); The telescopic support (2) comprises a guide seat (21) mounted on the follower frame body (1); a pressure head (22) which is linearly plugged and mounted on one end of the guide seat (21) and is in rolling connection with the slender shaft; a long adjustment bolt (23) with a handle is threadedly penetrated and connected to the other end of the guide seat (21); a spring (24) is installed inside the guide seat (21), and the spring (24) is in contact with the pressure head (22).

2. The center tool rest for automatic drawing of slender shafts according to claim 1, characterized in that: The tool holder body (1) comprises a C-shaped circular ring plate (11); the outer ring surface of the C-shaped circular ring plate (11) is evenly distributed with three radially arranged first circular through holes (12); the inner wall of the first circular through hole (12) is axially symmetrically provided with a first rectangular guide groove (13); the side surface of the C-shaped circular ring plate (11) is provided with three first threaded holes (14) which are in communication with the first circular through holes (12) and are connected and matched with the first handle bolts (3); the side surface of the C-shaped circular ring plate (11) is fixed with a supporting vertical plate (15) extending towards each other; and the supporting vertical plate (15) is provided with two second threaded holes (16).

3. The center tool rest for automatic drawing of slender shafts according to claim 2, characterized in that: The guide seat (21) comprises a cylinder (211); a second rectangular guide groove (212) is formed at one end of the cylinder (211); the spring (24) is arranged at the inner bottom of the second rectangular guide groove (212); a rectangular guide protrusion (213) cooperating with the first rectangular guide groove (13) is integrally formed on the outer wall of the same end of the cylinder (211) in an axially symmetrical manner; a third threaded hole (214) communicating with the second rectangular guide groove (212) is formed at the other end of the cylinder (211); the third threaded hole (214) is threadedly connected to the handle-adjusting long bolt (23).

4. The center tool rest for automatic drawing of slender shafts according to claim 3 is characterized in that: The pressure head (22) comprises a rectangular rod (221) that is slidably matched with the second rectangular guide groove (212); a side wall of the rectangular rod (221) is provided with a waist-shaped long groove (222); an outer wall of the cylindrical body (211) is provided with a fourth threaded hole (215) that is connected with the second rectangular guide groove (212); a second handle bolt (25) is connected to the inner thread of the fourth threaded hole (215), and the end of the second handle bolt (25) is placed in the waist-shaped long groove (222); two single ears (223) are installed at the free end of the rectangular rod (221); a bearing (224) is installed between the two single ears (223) via a pin and a buckle.

5. The center tool rest for automatic drawing of slender shafts according to claim 4, characterized in that: One of the rectangular guide protrusions (213) is provided with a row of circular grooves (216).

Images