A large-diameter machining lathe

Abstract

The present invention belongs to the technical field of machining lathes, and is particularly a large-diameter machining lathe, comprising: a bed, a spindle box is installed on the left side of the upper end of the bed, a tailstock is installed on the right side of the upper end of the bed, the spindle box is composed of a three-jaw chuck for grabbing workpieces and a feed box for feeding speed change, the feed box is installed on the inner side of the spindle box, the three-jaw chuck is installed on the right side of the spindle box, a lead screw is installed on one side of the feed box, a slide box is installed on the outer surface of the lead screw, a tool holder is provided at the upper end of the slide box, a tool lock seat is provided on the left side of the tool holder, a slot is provided at the center line of the left side of the tool lock seat, and the tool lock seat is composed of a tool lock bolt for clamping a cutting tool, an auxiliary body for supporting the cutting tool, and a regulating valve for clamping the auxiliary body. The present invention solves the problem that ordinary reaming tools are bent after long-term use.

Description

Technical Field

[0001] The invention relates to the technical field of machining lathes, in particular to a large-aperture machining lathe. Background Art

[0002] A lathe is a machine tool that mainly uses a turning tool to turn a rotating workpiece. Drills, reamer drills, reamers, taps, dies and knurling tools can also be used on the lathe for corresponding processing.

[0003] Existing lathes still have shortcomings. When expanding a workpiece, the biggest problem is that the expanding knife is prone to bending, especially when expanding an inner hole. The width of the cutting knife itself is not too large. After running for a long time, the knife will bend. When the tool is bent, it is basically scrapped because it cannot meet the requirements of machining accuracy. If you try to straighten the bent tool, it will also affect the requirements of machining accuracy. In addition, when the existing large-aperture machining lathes perform expanding operations, the resistance generated is relatively large. If the support clamping point position of the expanding knife is too fixed, the service life of the expanding knife will be reduced. For example, a four-edged stepped expanding knife in Chinese patent CN216502531U can indeed increase the service life of the expanding knife and prevent the bending of the knife in most processing plants. However, the disadvantage is that the processing difficulty of the expanding knife is increased, and the corresponding production cost may be several times or even more than that of an ordinary expanding knife. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a large-diameter processing lathe, which solves the problem that ordinary reaming tools may bend after long-term use.

[0005] To achieve the above object, the present invention provides the following technical solution: a large-diameter machining lathe, comprising: a bed,

[0006] A spindle box is installed on the left side of the upper end of the bed, and a tailstock is installed on the right side of the upper end of the bed; the spindle box is composed of a three-jaw chuck for grabbing workpieces and a feed box for feeding speed change;

[0007] The feed box is installed on the inner side of the spindle box, the three-jaw chuck is installed on the right side of the spindle box, a lead screw is installed on one side of the feed box, a slide box is installed on the outer surface of the lead screw, a tool holder is provided at the upper end of the slide box, and a tool lock seat is provided on the left side of the tool holder;

[0008] A groove is provided at the center line of the left side of the knife locking seat. The knife locking seat consists of a knife locking bolt for clamping the cutting knife and an auxiliary body for supporting the cutting knife. A groove A is provided at the bottom of the auxiliary body, and internal teeth are provided in the groove A. A groove B is provided in the middle position of the bottom of the knife locking seat. A transverse through groove C is provided near the bottom of the knife locking seat, and the groove C is connected with the groove B. The groove B is provided with a transversely penetrating rotating shaft. A regulating valve for driving the rotating shaft to rotate is installed on the left side of the rotating shaft. The rotating shaft is provided with external teeth on the outer surface of the groove B, and the external teeth and the internal teeth constitute a gear transmission.

[0009] As a preferred technical solution of the present invention, the auxiliary body is installed in the groove C at the lower end of the locking knife seat.

[0010] As a preferred technical solution of the present invention, the upper end surface of the rear side of the auxiliary body is provided with an upward protrusion, and the protrusion is in the same horizontal plane as the groove surface provided at the center line of the left side of the locking knife seat.

[0011] As a preferred technical solution of the present invention, the knife locking bolts are provided in two groups which are respectively installed on the front and rear sides of the upper end of the knife locking seat.

[0012] As a preferred technical solution of the present invention, the upper end surface of the protrusion contacts the lower end surface of the cutting blade, and the width of the protrusion end surface is 2cm-4cm.

[0013] As a preferred technical solution of the present invention, the groove at the lower end of the locking knife seat is coated with lubricating oil.

[0014] Compared with the prior art, the present invention provides a large-aperture machining lathe, which has the following beneficial effects:

[0015] The upper end surface of the protrusion is provided with an embedding groove, and a vacuum suction cup is provided in the embedding groove;

[0016] A rubber block 1 is arranged below one end of the reaming knife, a rubber block 2 is arranged on the bottom surface of the rubber block 1, an opening is arranged on the upper end surface of the rubber block 2, and the outer end surface of the opening is connected to the rubber block 1, so that a closed accommodation space is formed inside the rubber block 2;

[0017] The vacuum suction cup is in detachable contact with the bottom surface of the first rubber block, and the second rubber block is detachably embedded in the vacuum suction cup.

[0018] The rubber block 1 is connected to the reaming knife through structural adhesive, and the rubber block 2 is connected to the rubber block 1 through structural adhesive.

[0019] (1) After the reaming knife is installed in the left groove of the knife lock seat, the regulating valve is turned to drive the rotating shaft to rotate, and the auxiliary body is driven to move through the gear transmission, thereby increasing the stability of the connection between the auxiliary body and the knife lock seat. The distance needs to be determined by the user according to the length of the reaming knife, and the end face width of the protrusion is between 2cm and 4cm, and different widths can be processed according to different requirements, so as to adapt to the reaming needs of reaming knives of different lengths. The user determines the moving distance of the auxiliary body according to the specific length of the reaming knife, fixes it through the regulating valve, and then fixes the reaming knife through the knife lock bolt. Through the movement of the auxiliary body, the distance between the force points of the reaming knife is extended, so that it can better provide auxiliary support for the reaming knife. When the reaming knife is working, the bending phenomenon of the reaming knife over a long distance is reduced, thereby increasing the service life of the reaming knife.

[0020] (2) The present invention has a simple structure and is easy to operate. It can adjust the distance according to the different lengths of the reamer, thereby improving the practicality. Moreover, after testing, it has been found that the service life of the reamer can be increased and the bending of the reamer can be reduced by adding a small structure at the minimum cost without changing the reamer.

[0021] (3) In this solution, a vacuum suction cup is provided on the protrusion, and a rubber block 1 and a rubber block 2 are provided on the reaming knife, which has the following technical effects:

[0022] First, the vacuum suction cup is attached to the bottom surface of the rubber block, so that the auxiliary body can drive the reaming knife to move, and it is also convenient to separate from the reaming knife;

[0023] Second, the rubber block 2 is arranged inside the vacuum suction cup. Under the action of the external vacuum, the air inside the rubber block 2 expands, so that the outer side of the rubber block 2 is attached to the inner side of the vacuum suction cup, so the vacuum suction cup plays a role in strengthening the limiting effect of the reaming knife;

[0024] Third, under the extrusion of the knife locking bolt, the rubber block 1 and the rubber block 2 also play a role in buffering and positioning the reaming knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the structure of a large-aperture machining lathe of the present invention.

[0026] Figure 2 The present invention is a schematic diagram of the tool holder structure of a large-aperture machining lathe.

[0027] Figure 3 The present invention is a schematic diagram of the auxiliary body structure of a large-aperture machining lathe.

[0028] Figure 4 A large-diameter machining lathe according to the present invention Figure 3A local enlarged schematic diagram of point A.

[0029] Figure 5 The present invention is a bottom view of a tool lock seat structure of a large-aperture machining lathe.

[0030] Figure 6 It is a schematic diagram of the position structure of the auxiliary body and the reaming knife of the present invention.

[0031] In the figure: 1. bed; 2. spindle box; 3. tailstock; 4. three-jaw chuck; 5. lead screw; 6. slide box; 7. tool holder; 8. tool lock seat; 9. tool lock bolt; 10. auxiliary body; 11. regulating valve; 12. internal teeth; 13. external teeth; 14. rotating shaft; 15. protrusion; 151. vacuum suction cup; 16. groove; 17. reaming knife; 171. rubber block one; 172. rubber block two. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] See also Figure 1-Figure 5The present invention provides the following technical solution: A large-diameter machining lathe, comprising: a bed 1, a spindle box 2 is installed on the left side of the upper end of the bed 1, and a tailstock 3 is installed on the right side of the upper end of the bed 1; the spindle box 2 is composed of a three-jaw chuck 4 for grabbing a workpiece and a feed box for feeding speed change;

[0036] The feed box is installed on the inner side of the spindle box 2, the three-jaw chuck 4 is installed on the right side of the spindle box 2, a lead screw 5 is installed on one side of the feed box, a slide box 6 is installed on the outer surface of the lead screw 5, a tool holder 7 is provided on the upper end of the slide box 6, and a tool lock seat 8 is provided on the left side of the tool holder 7;

[0037] A groove 16 is provided at the center line of the left side of the knife locking seat 8. The knife locking seat 8 is composed of a knife locking bolt 9 for clamping the cutting knife and an auxiliary body 10 for supporting the cutting knife. A groove A is provided at the bottom of the auxiliary body 10, and an internal tooth 12 is provided in the groove A. A groove B is provided in the middle position of the bottom of the knife locking seat 8. A transverse through groove C is provided near the bottom of the knife locking seat 8 below the groove 16. The groove C is connected with the groove B. The groove B is provided with a transversely penetrating rotating shaft 14. A regulating valve 11 for driving the rotating shaft 14 to rotate is installed on the left side of the rotating shaft 14. The rotating shaft 14 passes through the outer surface of the groove B and is provided with external teeth 13. The external teeth 13 and the internal teeth 12 constitute a gear transmission.

[0038] In this implementation plan, refer to Figure 1 It can be seen that the bed 1 provides an installation position for the spindle box 2 and the tailstock 3, the three-jaw chuck 4 is used to clamp the workpiece and then rotate it through the gears in the spindle box 2, which makes it convenient for the cutting tool to process the workpiece, the screw 5 facilitates the movement of the slide box 6, and then drives the tool holder 7 to move along the axis of the screw 5, the locking knife seat 8 provides an installation position for the tool holder 7, the locking knife bolt 9 clamps the cutting knife, and the auxiliary body 10 is used to extend the force point of the cutting knife to prevent the cutting knife from bending during processing. When the inner hole of the workpiece needs to be expanded, the user should place the expanding knife in the groove on the left side of the locking knife seat 8, and then appropriately stretch the auxiliary body 10 backward according to the length of the expanding knife, so that the rear side of the auxiliary body 10 bulges to support the expanding knife, and then expand the workpiece.

[0039] Specifically, the auxiliary body 10 is installed in the groove C at the lower end of the knife locking seat 8.

[0040] In this embodiment, refer to Figure 2 It can be seen that installing the auxiliary body 10 into the groove C provides a sliding track for the sliding of the auxiliary body 10, so that the auxiliary body 10 can adjust the sliding distance according to the length of different cutting knives, thereby improving the applicability of the auxiliary body 10, and then the auxiliary body 10 is fixed by the regulating valve 11.

[0041] Specifically, an upward protrusion 15 is provided on the rear upper end surface of the auxiliary body 10 , and the protrusion is in the same horizontal plane as the groove surface provided at the center line of the left side of the locking knife seat 8 .

[0042] In this embodiment, refer to Figure 3 It can be seen that the function of the protrusion 15 is to support the cutting knife, extend the force bearing point of the cutting knife, increase the service life of the cutting knife, and reduce the occurrence of bending of the cutting knife.

[0043] Specifically, there are two groups of knife locking bolts 9 which are respectively installed on the front and rear sides of the upper end of the knife locking seat 8 .

[0044] In this embodiment, refer to Figure 2 It can be seen that the main purpose of the knife locking bolt 9 is to clamp and fix the cutting knife.

[0045] Specifically, the upper end surface of the protrusion 15 contacts the lower end surface of the cutting blade, and the width of the end surface of the protrusion 15 is 2 cm-4 cm.

[0046] In this embodiment, the contact with the lower end of the cutting knife is for the purpose of supporting the cutting knife, and the width is 2cm-4cm. This is mainly because if the width is too wide, it will affect the feed of the cutting knife, and if the width is not enough, it will affect the force point of the cutting knife, causing the protrusion 15 to not achieve the expected effect.

[0047] Specifically, the slot at the lower end of the locking knife seat 8 is smeared with lubricating oil.

[0048] In this embodiment, it is ensured that when the auxiliary body 10 is pulled, the friction between the auxiliary body 10 and the groove wall is reduced, so that the auxiliary body 10 is pulled smoothly, and at the same time, rust on the auxiliary body 10 and the groove is prevented, which causes the phenomenon of unsmooth pulling.

[0049] See also Figure 6 The upper end surface of the protrusion 15 is provided with an embedding groove, and a vacuum suction cup 151 is provided in the embedding groove;

[0050] A rubber block 171 is disposed below one end of the reamer 17, a rubber block 172 is disposed on the bottom surface of the rubber block 171, an opening is disposed on the upper end surface of the rubber block 172, and the outer end surface of the opening is connected to the rubber block 171, so that a closed accommodation space is formed inside the rubber block 172;

[0051] The vacuum suction cup 151 is in detachable contact with the bottom surface of the rubber block 1 171 , and the rubber block 2 172 is detachably embedded in the vacuum suction cup 151 .

[0052] The rubber block 171 is connected to the reaming knife 17 via structural adhesive, and the rubber block 2 172 is connected to the rubber block 171 via structural adhesive.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-diameter machining lathe, comprising a bed (1), characterized in that: A spindle box (2) is installed on one side of the upper end of the bed (1), and a tailstock (3) is installed on the other side of the upper end of the bed (1); the spindle box (2) is composed of a three-jaw chuck (4) for grasping workpieces and a feed box for feeding speed change; The feed box is installed on the inner side of the spindle box (2), the three-jaw chuck (4) is installed on one side of the spindle box (2), a lead screw (5) is installed on one side of the feed box, a slide box (6) is installed on the outer surface of the lead screw (5), a tool holder (7) is provided at the upper end of the slide box (6), and a tool lock seat (8) is provided on the left side of the tool holder (7); A groove (16) is provided at the center line of one side of the knife lock seat (8). The knife lock seat (8) is composed of a knife lock bolt (9) for clamping the cutting knife and an auxiliary body (10) for supporting the cutting knife. A groove A is provided at the bottom of the auxiliary body (10). An internal tooth (12) is provided in the groove A. A groove B is provided at the middle position of the bottom of the knife lock seat (8). A transversely penetrating groove C is provided below the knife lock seat (8) near the groove (16). The groove C is connected to the groove B. A transversely penetrating shaft (14) is provided in the groove B. A regulating valve (11) for driving the rotating shaft (14) to rotate is installed on one side of the rotating shaft (14). The rotating shaft (14) penetrates the outer surface of the groove B and is provided with external teeth (13). The external teeth (13) and the internal teeth (12) form a gear transmission. The upper end surface of the rear side of the auxiliary body (10) is provided with an upward protrusion (15), and the protrusion (15) is in the same horizontal plane as the slotted surface provided at the center line of the left side of the locking knife seat (8); The upper end surface of the protrusion (15) is provided with an embedding groove, and a vacuum suction cup (151) is provided in the embedding groove; A reaming knife (17) is placed in the locking knife seat (8), a rubber block 1 (171) is arranged below one end of the reaming knife (17), a rubber block 2 (172) is arranged on the bottom surface of the rubber block 1 (171), an opening is arranged on the upper end surface of the rubber block 2 (172), and the outer end surface of the opening is connected to the rubber block 1 (171), so that a closed accommodating space is formed inside the rubber block 2 (172); The vacuum suction cup (151) is in detachable contact with the bottom surface of the first rubber block (171), and the second rubber block (172) is detachably embedded in the vacuum suction cup (151); The rubber block 1 (171) is connected to the reaming knife (17) via structural adhesive, and the rubber block 2 (172) is connected to the rubber block 1 (171) via structural adhesive.

2. A large-diameter machining lathe according to claim 1, characterized in that: The auxiliary body (10) is installed in the groove C at the lower end of the locking knife seat (8).

3. A large-diameter machining lathe according to claim 1, characterized in that: The knife locking bolts (9) are provided in two groups and are respectively installed on both sides of the upper end of the knife locking seat (8).

4. A large-diameter machining lathe according to claim 1, characterized in that: The upper end surface of the protrusion (15) contacts the lower end surface of the cutting blade, and the width of the end surface of the protrusion (15) is 2cm-4cm.

5. A large-diameter machining lathe according to claim 2, characterized in that: The slotted position at the lower end of the locking knife seat (8) is smeared with lubricating oil.

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