High-precision deep hole machining lathe

Abstract

The utility model relates to the technical field of lathes, in particular to a high-precision deep hole machining lathe, and aims to solve the technical problems that when a lathe is used for machining deep holes, a supporting frame needs to be adopted for supporting, a bar is supported by manually rotating the supporting frame composed of a plurality of screws, and precision is low. The upper ends of the supporting legs are connected with a hollow disc, the hollow disc and the centering clamp are concentrically arranged, a plurality of rotating shafts are evenly and rotatably connected to the upper circumference of the hollow disc, the rotating shafts can be driven and locked through a driving device, the rotating shafts are connected with connecting rods, the tail ends of the connecting rods are rotatably connected with rolling wheels, and the distances from the circle center of each rolling wheel to the circle center of the hollow disc are equal. A bar is placed between the centering clamps and the rolling wheels in the hollow disc, the driving device drives the connecting rods evenly distributed on the circumference to rotate synchronously, the connecting rods drive the rolling wheels to rotate to clamp and center the bar, at the moment, the centering clamp located at one end is controlled to clamp the bar, and the automatic centering precision of the multiple connecting rods is very high.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe technical field, and the specific field is a kind of high-precision deep hole processing lathe. BACKGROUND

[0002] Deep hole processing lathe is a kind of machine tool specially used for processing deep hole.Deep hole generally refers to the ratio of the depth of the hole to the diameter is greater than 5 hole.This lathe is mainly used in mechanical manufacturing, aerospace, automobile, weapon and many other industries, such as processing gun barrel, hydraulic cylinder, deep oil hole in shaft parts, etc.Due to the high requirements of these parts on the accuracy, straightness, surface roughness of hole, ordinary lathe is difficult to meet the special requirements of deep hole processing, and deep hole processing lathe emerges as the times require.

[0003] When deep hole processing lathe is processing, workpiece is generally rotated by main shaft, and tool makes feeding movement.Taking gun drill as an example, when workpiece rotates, cutting edge of gun drill cuts workpiece, and the generated chip is discharged through the chip removal channel inside gun drill.High-pressure cooling liquid is delivered to cutting area through the center hole of gun drill, which cools tool and workpiece on one hand, and flushes chip out of chip removal channel and discharges it outside the hole along the gap between tool bar and processed hole wall on the other hand.

[0004] When lathe is processing deep hole, due to the length and weight of bar stock, the clamp at one end is difficult to clamp the bar stock, so support frame needs to be used to support, and the bar stock is supported by manually rotating support frame composed of multiple screw rods, so the precision is low. UTILITY MODEL CONTENTS

[0005] The utility model discloses in order to solve the technical problem that the bed needs to adopt support frame support when processing deep hole, and the bar stock is supported by manually rotating support frame composed of multiple screw rods, and the precision is low, and further provides a kind of high-precision deep hole processing lathe.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of high-precision deep hole processing lathe, it include: rack, guide rail and centering fixture are connected on rack, tool set is slidably connected on guide rail, and the guide rail between centering fixture and tool set is detachably connected with support leg, the upper end of support leg is connected with hollow disc, and hollow disc is concentrically arranged with centering fixture, a plurality of rotating shafts are rotationally connected on the circumference of hollow disc, rotating shaft can be driven and locked by driving device, rotating shaft is connected with connecting rod, and connecting rod is rotationally connected with roller at the end, and the distance between the center of each roller and the center of hollow disc is equal.

[0007] Preferably, the support leg includes a fixed support leg that can be clamped on one side of the guide rail, the upper end of the fixed support leg is connected to the hollow disc through a support, and a detachable support leg can be clamped on the other side of the guide rail, and the fixed support leg and the detachable support leg are connected by bolts.

[0008] Preferably, the driving device comprises a screw rod, the screw rod is rotationally connected in a rotating block one, the rotating block one is hingedly connected with a hinged seat, the hinged seat is connected on the hollow disc, the screw rod is threadedly connected in a rotating block two, the rotating block two is hingedly connected with the edge of a gear ring, the gear ring is rotationally connected in a ring groove, the ring groove is connected on the hollow disc, a plurality of gear wheels are engaged in the gear ring, and each gear wheel is connected with a rotating shaft.

[0009] Preferably, the two groups of the supporting legs, the hollow discs, the connecting rods and the rollers are symmetrical, and one rotating shaft connects the connecting rods located at the same position in the two groups.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] When clamping, the bar is placed between the centering clamp and the rollers in the hollow disc, the driving device drives the connecting rods to rotate synchronously, the connecting rods drive the rollers to rotate to clamp and center the bar, the centering clamp at one end is controlled to clamp the bar, the multiple connecting rods automatically center with high precision, the moving cutter group contacts the rotating end of the bar to start the hole forming, the deep hole machining precision is greatly improved, and the technical problem that the supporting frame supports the bar by rotating multiple screw rods manually in the prior art is solved.

[0012] The two groups of hollow discs, connecting rods and rollers support the bar, the centering and clamping are more stable, and the machining precision is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure of the utility model is shown Figure One ;

[0014] Figure 2 The structure of the utility model is shown Figure Two ;

[0015] Figure 3 The structure of the utility model is shown Figure Three .

[0016] In the drawing: rack 1; guide rail 2; cutter group 3; centering clamp 4; supporting leg 5; fixed supporting leg 51; support 52; dismounting supporting leg 53; bolt 54; hollow disc 6; rotating shaft 7; driving device 8; screw rod 81; rotating block one 82; hinged seat 83; rotating block two 84; gear ring 85; ring groove 86; gear wheel 87; connecting rod 9; roller 10. DETAILED DESCRIPTION

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The rotary connection described in this device refers to the axial fixation of the bearing by mounting the bearing on the shaft, with a spring retaining ring groove provided on the shaft or shaft hole, and the rotation achieved by locking the elastic retaining ring in the retaining ring groove; the hinge connection refers to the connection method that allows movement through connecting parts such as hinges, pins, and short shafts.

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Example

[0020] The following is in conjunction with the appendix Figures 1-3 This embodiment describes a high-precision deep hole machining lathe, comprising: a frame 1, on which a guide rail 2 and a centering fixture 4 are connected, a tool assembly 3 is slidably connected to the guide rail 2, a support leg 5 is detachably connected to the guide rail 2 between the centering fixture 4 and the tool assembly 3, a hollow disc 6 is connected to the upper end of the support leg 5, the hollow disc 6 and the centering fixture 4 are concentrically arranged, a plurality of rotating shafts 7 are evenly distributed and rotatably connected on the circumference of the hollow disc 6, the rotating shafts 7 can be driven and locked by a drive device 8, the rotating shafts 7 are connected to a connecting rod 9, and a roller 10 is rotatably connected to the end of the connecting rod 9, the distance from the center of each roller 10 to the center of the hollow disc 6 is equal.

[0021] During clamping, the support leg 5 is installed on the guide rail 2, and the bar stock is placed between the centering fixture 4 and the roller 10 inside the hollow disc 6. The drive device 8 drives multiple evenly distributed rotating shafts 7 to rotate synchronously. The rotating shafts 7 drive the connecting rod 9 to rotate synchronously with the roller 10. Since the distance from the center of each roller 10 to the center of the hollow disc 6 is equal, the connecting rod 9 drives the roller 10 to rotate, clamping and centering the bar stock. After centering, the drive device 8 locks the connecting rod 9, preventing it from loosening. By adjusting the installation position, the clamping point is located in the middle of the bar stock. During clamping, the bar stock can maintain good balance and will not tilt to the sides, resulting in higher clamping and centering accuracy. At this time, the centering fixture 4 located at one end clamps the bar stock. The automatic centering accuracy of multiple connecting rods 9 is very high. The moving tool group 3 contacts the end of the rotating bar stock and begins to open the hole, greatly improving the deep hole machining accuracy and solving the technical problem of low accuracy in the existing technology where the support frame supports the bar stock by manually rotating multiple screws.

[0022] The supporting leg 5 comprises a fixed supporting leg 51 capable of being buckled on one side of the guide rail 2, the upper end of the fixed supporting leg 51 being connected with the hollow disc 6 through a support 52, and a dismounting supporting leg 53 capable of being buckled on the other side of the guide rail 2, the fixed supporting leg 51 being connected with the dismounting supporting leg 53 through a bolt 54.

[0023] During installation, the fixed supporting leg 51 is buckled on one side of the guide rail 2, and the fixed supporting leg 51 is fixed with the dismounting supporting leg 53 through the bolt 54, thus completing the installation.

[0024] The driving device 8 comprises a screw rod 81 rotationally connected in a rotating block one 82, the rotating block one 82 being hingedly connected with a hinged seat 83 connected on the hollow disc 6, the screw rod 81 being threadedly connected in a rotating block two 84, the rotating block two 84 being hingedly connected with the edge of a tooth ring 85, the tooth ring 85 being rotationally connected in a ring groove 86 connected on the hollow disc 6, and the tooth ring 85 being engaged with a plurality of gear wheels 87, each of which is connected with a rotating shaft 7.

[0025] During driving, the screw rod 81 is rotated, the screw rod 81 being axially limited by the rotating block one 82, the screw rod 81 driving the tooth ring 85 to rotate in the ring groove 86 through the rotating block two 84, the tooth ring 85 driving the rotating block one 82 and the rotating block two 84 to rotate around the hinged shaft during the rotation of the tooth ring 85, the angle of the screw rod 81 being changed, the tooth ring 85 driving all the gear wheels 87 to rotate, and all the rotating shafts 7 being synchronously rotated by the gear wheels 87, thus completing the clamping of the bar material, since the screw rod 81 and the rotating block two 84 can be self-locked, the tooth ring 85 is locked when the screw rod 81 is not rotating, and the bar material is clamped.

[0026] The supporting leg 5, the hollow disc 6, the connecting rod 9 and the roller 10 are symmetrically provided with two groups, and one rotating shaft 7 connects the connecting rods 9 located at the same position in the two groups.

[0027] The bar material is supported by the two groups of hollow discs 6, connecting rods 9 and rollers 10, the centering and clamping are more stable, and the machining precision is further improved.

[0028] In the description of the present application, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linkage", "fixation" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The standard parts used in the present application can be purchased from the market, and the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0030] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-precision deep-hole machining lathe, comprising: The rack (1) is connected with a guide rail (2) and a centering clamp (4), the guide rail (2) is slidably connected with a cutter group (3), The feature is that a support leg (5) is detachably connected on the guide rail (2) between the centering clamp (4) and the cutter group (3), the upper end of the support leg (5) is connected with a hollow disc (6), the hollow disc (6) is concentrically arranged with the centering clamp (4), a plurality of rotating shafts (7) are circumferentially and rotatably connected on the hollow disc (6), the rotating shafts (7) can be driven and locked by a driving device (8), the rotating shafts (7) are connected with connecting rods (9), the connecting rods (9) are rotatably connected with rollers (10) at the ends, and the distance from the center of each roller (10) to the center of the hollow disc (6) is equal.

2. The high-precision deep hole processing lathe according to claim 1, characterized in that: The support leg (5) comprises a fixed support leg (51), the fixed support leg (51) can be buckled on one side of the guide rail (2), the upper end of the fixed support leg (51) is connected with the hollow disc (6) through a support (52), a dismounting support leg (53) can be buckled on the other side of the guide rail (2), and the fixed support leg (51) and the dismounting support leg (53) are connected through bolts (54).

3. The high-precision deep hole processing lathe according to claim 1, characterized in that: The driving device (8) comprises a screw rod (81), the screw rod (81) is rotatably connected in a rotating block one (82), the rotating block one (82) is hingedly connected with a hinged seat (83), the hinged seat (83) is connected on the hollow disc (6), the screw rod (81) is threadedly connected in a rotating block two (84), the rotating block two (84) is hingedly connected with the edge of a tooth ring (85), the tooth ring (85) is rotatably connected in a ring groove (86), the ring groove (86) is connected on the hollow disc (6), a plurality of gear wheels (87) are engaged in the tooth ring (85), and each gear wheel (87) is connected with a rotating shaft (7).

4. The high-precision deep hole machining lathe according to any one of claims 1-3, characterized in that: The support leg (5), the hollow disc (6), the connecting rod (9) and the roller (10) are symmetrically provided with two groups, and one rotating shaft (7) connects the connecting rods (9) at the same position in the two groups.

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