Lathe positioning follow rest

Abstract

The utility model discloses a lathe positioning follow rest which comprises a transverse feeding mechanism and two longitudinal feeding mechanisms, the number of the longitudinal feeding mechanisms is two, the longitudinal feeding mechanisms are symmetrically installed on the transverse feeding mechanism in a front-back mode, and the two longitudinal feeding mechanisms are respectively provided with a knife rest and a positioning follow rest assembly. According to the lathe positioning follow rest, a longitudinal feeding mechanism and a driving system of the longitudinal feeding mechanism are additionally arranged, so that a positioning follow assembly of the lathe positioning follow rest and a tool rest turning numerical control action can be synchronously operated after tool setting, the instruction action which is the same as that of a turning tool is achieved through programming, and in the turning process of the tool, the machining precision is greatly improved. A self-aligning roller bearing of the positioning cutter following assembly limits the workpiece on the other side of the workpiece, and the situation that the workpiece is deformed and cannot be machined due to the fact that a cutter applies pressure to the workpiece is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a lathe tool rest, in particular to a tool follower positioning tool rest for a lathe. Background Art

[0002] Lathe is an important machine tool used for processing metals and other hard materials. It consists of a bed, spindle, spindle head, feed mechanism, cutting tool and workpiece fixture. The structure and working principle of the lathe will be introduced in detail below to help readers better understand this mechanical equipment.

[0003] When turning shaft workpieces with smaller diameters and longer lengths, the feed of the workpiece during the turning process will cause deformation of the workpiece, and the workpiece will experience centrifugal shaking when rotating, resulting in damage to the tool and scrapping of the workpiece. It is very difficult to process such workpieces. Therefore, in response to the needs of processing such workpieces, technical improvements are made to the existing technology to meet the processing conditions of such workpieces. Utility Model Content

[0004] The utility model aims to provide a lathe positioning tool rest to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A lathe positioning follower tool rest comprises a transverse feed mechanism and a longitudinal feed mechanism. The longitudinal feed mechanisms are two in number and are symmetrically mounted on the transverse feed mechanism. The two longitudinal feed mechanisms are respectively provided with a tool rest and a positioning follower tool assembly.

[0007] As a further solution of the utility model: the positioning and following tool assembly includes a sleeve, a core shaft installed and sliding in the sleeve, a rotatable spherical roller bearing is installed at one end of the core shaft close to the tool holder, a feed nut is installed at the tail of the sleeve, and a feed screw rod threadably connected to the feed nut is rotatably installed on the core shaft.

[0008] As a further solution of the utility model: the mandrel slides linearly toward or away from the tool holder under the drive of the feed screw, and the mandrel and the cutting tool installed on the tool holder are on the same axis.

[0009] As a further solution of the utility model: the two sides of the core shaft are slidably installed with the shaft sleeve through sliding connectors, and the core shaft slides in the shaft sleeve along the track of the sliding connector.

[0010] As a further solution of the utility model: a positioning groove is provided on the core shaft, and a positioning bolt extending into the positioning groove is threadedly installed on the sleeve, and the positioning bolt is screwed down to limit the core shaft in the sleeve.

[0011] As a further solution of the utility model: a hand wheel is installed at the tail end of the feed screw, and the feed screw is adjusted by rotating the hand wheel.

[0012] As a further solution of the utility model: the core shaft is installed with a spherical roller bearing through a quick-change bracket, the quick-change bracket is detachably installed with the core shaft through bolts, the axle is installed on the quick-change bracket, and the spherical roller bearing is installed on the axle through a bearing.

[0013] As a further solution of the utility model: the bracket is a single-arm bracket, and the single-arm bracket is equipped with a spherical roller bearing that is on the same axis as the tool on the tool holder through a shaft and a bearing.

[0014] As a further solution of the utility model: the bracket is a double-arm bracket, the double-arm bracket is Y-shaped, and has two end heads for mounting spherical roller bearings. The two end heads are respectively mounted with spherical roller bearings through shafts and bearings. The two spherical roller bearings are distributed up and down, and the midpoint between the two spherical roller bearings is on the same axis as the tool on the tool holder.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The lathe positioning follower tool rest increases a longitudinal feed mechanism and a driving system for the longitudinal feed mechanism so that the positioning follower tool assembly can run synchronously with the tool rest turning CNC action after tool alignment, and realizes the same command action as the turning tool through programming. During the turning process of the tool, the spherical roller bearing of the positioning follower tool assembly limits the workpiece on the other side of the workpiece to prevent the tool from exerting pressure on the workpiece, causing the workpiece to deform and be unable to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a lathe positioning and tool rest;

[0018] Figure 2 It is a structural schematic diagram of a single-arm bracket in a lathe positioning tool rest;

[0019] Figure 3 It is a structural stereogram of a double-arm support in a lathe positioning tool rest;

[0020] Figure 4 The present invention is a schematic diagram of the structure of a double-arm bracket in a lathe positioning tool rest.

[0021] In the figure: 1. lateral feed mechanism; 2. longitudinal feed mechanism; 3. bushing; 4. feed nut; 5. hand wheel; 6. quick-change bracket; 7. shaft; 8. spherical roller bearing; 9. positioning bolt; 10. feed screw; 11. core shaft; 12. sliding connector; 13. positioning groove. DETAILED DESCRIPTION

[0022] See also Figures 1 to 4 In an embodiment of the utility model, a lathe positioning follower tool rest comprises a transverse feed mechanism 1 and a longitudinal feed mechanism 2. There are two longitudinal feed mechanisms 2, which are symmetrically installed on the transverse feed mechanism 1. A tool rest and a positioning follower tool assembly are respectively arranged on the two longitudinal feed mechanisms 2. Two longitudinal feed mechanisms 2 are installed on the transverse feed mechanism 1, which are respectively used to assemble the tool rest and the positioning follower tool assembly. The driving method of the longitudinal feed mechanism 2 is the existing technology. The method of driving the longitudinal feed mechanism 2 of a CNC lathe can be used to drive the two longitudinal feed mechanisms 2 to move. The feeding distances of the two longitudinal feed mechanisms 2 should be the same, that is, the coordinate directions are different. The positioning follower tool assembly should also be aligned before operation.

[0023] As a further solution of the utility model: the positioning and following tool assembly includes a sleeve 3, a core shaft 11 installed and sliding in the sleeve 3, a rotatable spherical roller bearing 8 is installed at one end of the core shaft 11 close to the tool holder, a feed nut 4 is installed at the tail of the sleeve 3, and a feed screw 10 threadedly connected to the feed nut 4 is rotatably installed on the core shaft 11. In order to maintain the coaxiality of the shaft workpiece during the rotation process, the tail stock of the machine tool will participate in the coaxiality positioning of the shaft workpiece. At this time, the spherical roller bearing 8 is fed and the feed screw 10 is rotated to manually adjust the coaxiality of the shaft workpiece, which can play the role of conventional coaxiality positioning of the workpiece, provide convenience, and the process of determining the basic coordinates of the tool can be completed at the same time.

[0024] In a preferred embodiment, the core shaft 11 slides linearly toward or away from the tool holder under the drive of the feed screw 10. The core shaft 11 and the cutting tool installed on the tool holder are on the same axis. During the feeding process, the cutting tool will exert a certain force on the surface of the workpiece, causing the workpiece to deform. For this reason, a force in the opposite direction is applied to the opposite surface of the workpiece to support the workpiece and prevent the workpiece from deforming when subjected to force, thereby meeting the processing requirements of shaft workpieces.

[0025] In a preferred embodiment, the two sides of the core shaft 11 are slidably installed with the sleeve 3 through a sliding connection 12, and the core shaft 11 slides in the sleeve 3 along the trajectory of the sliding connection 12. The sliding connection 12 can be a slide groove and a slider located in the slide groove for positioning, or it can be a slide rail structure, which plays a role in preventing the core shaft 11 from rotating and limiting the moving trajectory of the core shaft 11.

[0026] In a preferred embodiment, a positioning groove 13 is provided on the core shaft 11, and a positioning bolt 9 extending into the positioning groove 13 is threadedly installed on the sleeve 3. The positioning bolt 9 is screwed down to limit the core shaft 11 in the sleeve 3. After completing the tool setting and coaxiality calibration positioning, the core shaft 11 is fixed in the sleeve 3 by rotating the positioning bolt 9 to enhance the fixing effect and prevent the workpiece from vibrating during the turning process and causing the core shaft 11 to move.

[0027] In a preferred embodiment, a hand wheel 5 is installed at the tail end of the feed screw 10, and the feed screw 10 is adjusted by rotating the hand wheel 5. The hand wheel 5 is a conventional manual drive method and is the main tool for the feed screw 10 during manual adjustment.

[0028] In a preferred embodiment, the core shaft 11 is installed with the spherical roller bearing 8 through the quick-change bracket 6, the quick-change bracket 6 is detachably installed with the core shaft 11 through bolts, the shaft 7 is installed on the quick-change bracket 6, and the shaft 7 is installed with the spherical roller bearing 8 through the bearing.

[0029] In a preferred embodiment, the bracket 6 is a single-arm bracket, which installs a spherical roller bearing 8 on the same axis as the tool on the tool holder through an axle 7 and a bearing. The single-arm bracket installs the spherical roller bearing 8 on the same axis as the tool. The spherical roller bearing 8 installed by the single-arm bracket limits the deformation of the shaft workpiece during turning, and the feeding of the spherical roller bearing 8 can be the existing technical method of controlled drive feeding of CNC machine tools.

[0030] In a preferred embodiment, the bracket 6 is a double-arm bracket, which is Y-shaped and has two end heads for mounting spherical roller bearings 8. The two end heads are respectively mounted with spherical roller bearings 8 through the shaft 7 and the bearing. The two spherical roller bearings 8 are distributed up and down, and the midpoint between the two spherical roller bearings 8 is on the same axis as the tool on the tool holder. The spherical roller bearings 8 contact the shaft workpiece at a point or a line. Therefore, when the turning feed amount is large, it is easy to cause the workpiece to move upward or downward. For this reason, the single-arm bracket is replaced with a double-arm bracket, so that it can limit the deformation resistance of the workpiece from the upper and lower angles, and better position the shaft workpiece.

[0031] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0032] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A lathe positioning tool rest, comprising a transverse feeding mechanism (1) and a longitudinal feeding mechanism (2), characterized in that: The number of the longitudinal feeding mechanisms (2) is two, which are symmetrically mounted on the transverse feeding mechanism (1) in a front-to-back manner, and a tool holder and a positioning follower tool assembly are respectively arranged on the two longitudinal feeding mechanisms (2).

2. The lathe positioning tool rest according to claim 1, characterized in that: The positioning follower assembly comprises a shaft sleeve (3), a core shaft (11) mounted and slidable in the shaft sleeve (3), a rotatable spherical roller bearing (8) mounted at one end of the core shaft (11) close to the tool holder, a feed screw nut (4) mounted at the rear end of the shaft sleeve (3), and a feed screw rod (10) threadably connected to the feed screw nut (4) mounted on the core shaft (11).

3. The lathe positioning tool rest according to claim 2, characterized in that: The mandrel (11) slides linearly in a direction approaching or moving away from the tool holder under the drive of the feed screw (10), and the mandrel (11) and the cutting tool mounted on the tool holder are located on the same axis.

4. The lathe positioning tool rest according to claim 2, characterized in that: The two sides of the core shaft (11) are slidably mounted on the shaft sleeve (3) via a sliding connection piece (12), and the core shaft (11) slides inside the shaft sleeve (3) along the track of the sliding connection piece (12).

5. The lathe positioning tool rest according to claim 2, characterized in that: The core shaft (11) is provided with a positioning groove (13), and a positioning bolt (9) extending into the positioning groove (13) is threadedly mounted on the shaft sleeve (3). The positioning bolt (9) is screwed downward to limit the core shaft (11) in the shaft sleeve (3).

6. The lathe positioning tool rest according to claim 2, characterized in that: A hand wheel (5) is mounted at the rear end of the feed screw (10), and the feed screw (10) is adjusted by rotating the hand wheel (5).

7. A lathe positioning tool rest according to any one of claims 2 to 6, characterized in that: The core shaft (11) is mounted with a spherical roller bearing (8) via a quick-change bracket (6); the quick-change bracket (6) is detachably mounted with the core shaft (11) via bolts; a shaft (7) is mounted on the quick-change bracket (6); and the shaft (7) is mounted with the spherical roller bearing (8) via a bearing.

8. The lathe positioning tool rest according to claim 7, characterized in that: The bracket (6) is a single-arm bracket, and a spherical roller bearing (8) is installed on the single-arm bracket through a shaft (7) and a bearing, and the spherical roller bearing (8) is located on the same axis as the tool on the tool holder.

9. The lathe positioning tool rest according to claim 7, characterized in that: The bracket (6) is a double-arm bracket in a Y shape and has two ends for mounting spherical roller bearings (8). The two ends are respectively mounted with spherical roller bearings (8) via shafts (7) and bearings. The two spherical roller bearings (8) are distributed up and down, and the midpoint between the two spherical roller bearings (8) is on the same axis as the tool on the tool holder.

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