CN101254552A - A Deep Hole Broaching and Boring Machine Tool - Google Patents

Abstract

It is a drawing and boring machine tool for processing deep holes in slender pipes. Its purpose is to meet the different processing requirements of various types of pipe fittings. The spindle box is installed at the left end of the fuselage. Fix the centering bracket on the top, fix the oiler at the tail end of the workpiece in the middle of the fuselage, the front support of the oiler and the rear support of the oiler are fixedly connected to the front side of the oiler along the main axis, and the boring bar moves from left to right along the main axis. Go through the front support of the oil feeder, the rear support of the oil feeder, the boring bar support frame, and the boring bar drive box in turn to the right, and be fixedly connected with the three-jaw chuck. Install a rotary joint on the left end surface of the boring bar, and fix the boring bar drive box Connected to the supporting plate, the feeding drive box is fixedly connected to the right side of the fuselage, the feeding driving box is connected with the feeding screw, the feeding screw drives the supporting plate and the boring bar driving box installed on it to reciprocate, and then It drives the longitudinal movement of the boring bar, and the front end of the boring bar is fixedly connected to the elastic support of the boring tool.

Description

A Deep Hole Broaching and Boring Machine Tool

technical field

The invention relates to boring and broaching machine tools.

Background technique

The deep-hole boring machines used for machining the inner holes of pipe parts at home and abroad mainly adopt the push-type boring processing method of slender boring bars. When the length-to-diameter ratio of the boring bar is less than 30, the boring bar has high rigidity and low vibration. At the same time, the lubricating fluid can be passed through the inner hole of the boring bar to fully cool and lubricate the cutting edge, and use high-pressure liquid to wash away the iron filings on the cutting tool head. , to ensure the machining accuracy and stability. However, when the length-to-diameter ratio of the boring bar is greater than 30, due to the low rigidity of the boring bar, the compression deformation during the push-boring process is serious, and vibration occurs, resulting in low machining accuracy, uneven wall thickness, rough surface, and short tool life. Problems seriously affect machining accuracy and production efficiency. At present, the deep hole boring machine generally adopts the processing method of fixed boring bar and rotating workpiece, which is suitable for deep hole processing of large-diameter pipe fittings, but for slender pipe fittings, it is difficult to overcome the problems of rotational deformation and chatter caused by workpiece rotation.

Contents of the invention

The object of the present invention is to provide a broaching and boring machine tool for processing deep holes of pipe fittings, so as to realize different processing requirements of various types of pipe fittings.

The present invention is a drawing and boring machine tool for processing deep holes in slender pipes. Tool front support 1, boring bar 12, boring bar support frame 10, rotary joint 16, supporting plate 14, boring bar drive box 15, feed screw 13 and feed drive box 17, spindle box 2 is installed on the left end of the machine body 11 , the front support 1 of the boring tool is fixed in the spindle box along the main axis AA', the centering bracket 6 is fixed on the fuselage 11, and the oil receiver 8 is fixed at the tail end of the workpiece in the middle of the fuselage 11 for cooling and lubrication of the boring tool 3 , the front support 7 of the oiler and the rear support 9 of the oiler are fixedly connected to the front side of the oiler 8 along the main axis AA', and the boring bar 12 passes through the front of the oiler from left to right along the main axis AA' Support 7, rear support of oiler 9, boring bar support frame 10, boring bar driving box 15, fixedly connected with three-jaw chuck 20, and a rotary joint 17 is installed on the left end surface of boring bar 12 for cooling of hollow boring bar Lubrication, the boring bar driving box 15 is fixedly connected to the supporting plate 14, the feeding driving box 18 is fixedly connected to the right side of the fuselage 11, the feeding driving box 18 is connected with the feeding screw 13, and the feeding screw 13 drives the supporting plate 14 and the boring bar drive box 15 installed thereon reciprocate, and then drive the boring bar 12 to move longitudinally, and the front end of the boring bar is fixedly connected to the elastic support 4 of the boring tool.

The boring bar of the present invention only produces slight bending deformation under the action of cutting resistance, and because the boring bar has axial tensile stress, the ability to resist bending deformation is improved, and the machining accuracy and efficiency are guaranteed. On the basis of avoiding the deflection and deformation of the boring bar by means of drawing and boring, different processing requirements of various types of pipe fittings can be realized. When processing large-diameter pipes, the processing method is adopted with the workpiece rotating and the boring bar fixed or reversely rotated; when processing small-diameter pipes, the processing method is adopted with the workpiece fixed and the boring bar rotating to ensure the processing accuracy and efficiency.

Description of drawings

Fig. 1 is a structural diagram of the overall appearance of the present invention, Fig. 2 is a structural diagram of a transmission mechanism, and Fig. 3 is a structural diagram of an elastic support of a boring tool.

Detailed ways

As shown in Figure 1, the present invention is a drawing and boring machine tool for processing slender pipe deep holes, which includes a fuselage 11, a spindle box 2, a centering bracket 6, an oiler 8, an oiler front support 7, an oiler Oiler rear support 9, boring tool front support 1, boring bar 12, boring bar support frame 10, rotary joint 16, supporting plate 14, boring bar drive box 15, feed screw 13 and feed drive box 17, spindle box 2 Installed on the left end of the fuselage 11, the front support 1 of the boring tool is fixed in the spindle box along the main axis AA', the centering bracket 6 is fixed on the fuselage 11, and the oil dispenser 8 is fixed on the tail end of the workpiece in the middle of the fuselage 11 For the cooling and lubrication of the boring tool 3, the front support 7 of the oiler and the rear support 9 of the oiler are fixedly connected to the front side of the oiler 8 along the main axis AA', and the boring bar 12 moves from left to right along the main axis AA' Pass through the front support 7 of the oiler, the rear support 9 of the oiler, the boring bar support frame 10, the boring bar drive box 15, and be fixedly connected with the three-jaw chuck 20, and install the rotary joint 17 on the left end surface of the boring bar 12, It is used for cooling and lubricating the hollow boring bar. The boring bar driving box 15 is fixedly connected to the supporting plate 14, and the feeding driving box 18 is fixedly connected to the right side of the fuselage 11. The feeding driving box 18 is connected with the feeding screw 13. The cutter screw 13 drives the supporting plate 14 and the boring bar driving box 15 installed thereon to reciprocate, and then drives the boring bar 12 to move longitudinally, and the front end of the boring bar is fixedly connected to the elastic support 4 of the boring tool.

As shown in Fig. 2, it is the structural diagram of the transmission mechanism of the present invention, the motor output shaft 28 is connected with the motor gear 29, the motor gear 29 meshes with the bull gear 30 fixed on the intermediate shaft-23, and the gear wheel fixed on the intermediate shaft-23 Slip duplex gear 27 meshes with duplex gear 34 fixed on intermediate shaft 2 21, transmission gear 22 fixed on intermediate shaft 2 21 meshes with main shaft gear 35 fixed on main shaft 19, drives main shaft 19 and is connected to The three-jaw chuck 20 at the left end of the main shaft 19 rotates. The governor handle 36 is fixed on the lower end of the governor shaft 18, the governor gear 25 is fixedly connected to the upper end of the governor shaft 18, the governor gear 25 meshes with the rack 24, and drives the shift fork 26 fixedly connected on the rack 24 to move, driving Sliding duplex gear 27 meshes with the large and small teeth of fixed duplex gear 34 respectively to realize speed change. The boring bar clamp 33 is fixedly connected to the right side of the boring bar driving box (15), so as to realize the locking of the boring bar.

As shown in Figure 3, it is a structural diagram of the elastic support of the boring tool. The elastic support frame 37 and the copper sleeve 38 are located on the inner side of the boring tool 3, and the rigid support 39 and the elastic support frame 37 used for rough positioning support of the boring tool are located on the outside of the boring tool 3. , the elastic support frame 37 is a ring-shaped support with 4 to 6 spring steel columnar teeth, which is fixed on the boring bar 12 through a copper sleeve 38, and the rigid support 39 is composed of 4 to 6 support blocks embedded in the longitudinal keyway. The limit block 40 fixed on the end face of the boring bar 12 is fixed.

Claims (3)

1. the drawing-boring machine tool that is used for processing slim pipe deep hole, comprise fuselage (11), main spindle box (2), centering support (6), award oily device (8), support (7) before awarding oily device, support (9) after awarding oily device, support before the boring cutter (1), boring bar (12), boring bar bracing frame (10), swivel joint (16), supporting plate (14), boring bar driving box (15), feed leading screw (13) and feed driving box (17), it is characterized in that main spindle box (2) is installed in fuselage (11) left end, supporting (1) before the boring cutter is fixed in the main spindle box along main shaft (AA ') direction, go up fixing centering support (6) at fuselage (11), the workpiece tail end is fixedly awarded oily device (8) at fuselage (11) middle part, support (9) is fixedly connected on along main shaft (AA ') direction and awards oily device (8) leading flank after awarding the preceding support of oily device (7) and awarding oily device, boring bar (12) passes from left to right successively along main shaft (AA ') direction awards oily device preceding support (7), support (9) after awarding oily device, boring bar bracing frame (10), boring bar driving box (15), fixedly connected with scroll chuck (20), on boring bar (12) left side, swivel joint (17) is installed, boring bar driving box (15) fixed connection is on supporting plate (14), feed driving box (18) fixed connection is on fuselage (11) right side, feed driving box (18) connects with feed leading screw (13), boring bar driving box (15) reciprocating motion that feed leading screw (13) drives supporting plate (14) and is mounted thereon, and then drive boring bar (12) lengthwise movement, the boring bar front end boring cutter resiliency supported (4) that is fixedly connected.

2. the drawing-boring machine tool that is used for processing slim pipe deep hole according to claim 1, it is characterized in that motor output shaft (28) and motor gear (29) connect, motor gear (29) and gear wheel (30) engagement that is fixed on the jackshaft one (23), be fixed on slippage duplicate gear (27) and duplicate gear (34) engagement that is fixed on the jackshaft two (21) on the jackshaft one (23), be fixed on travelling gear (22) and mainshaft gear (35) engagement that is fixed on the main shaft (19) on the jackshaft two (21), drive main shaft (19) and be connected scroll chuck (20) rotation of main shaft (19) left end; Speed adjusting lever (36) is fixed on speed governing axle (18) lower end, governor gear (25) fixed connection is in speed governing axle (18) upper end, governor gear (25) and tooth bar (24) engagement, drive the shift fork (26) of fixed connection on tooth bar (24) and move, drive slippage duplicate gear (27) and be meshed with the fixing big or small tooth of duplicate gear (34) respectively; Boring bar binding clasp (33) fixed connection is on boring bar driving box (15) right side.

3. the drawing-boring machine tool that is used for deep hole processing according to claim 1, it is characterized in that flexible supporting frames (37), copper sheathing (38) are positioned at boring cutter (3) inboard, rigid support (39), be used for the flexible supporting frames (37) that the coarse positioning of boring cutter supports and be positioned at boring cutter (3) outside, flexible supporting frames (37) is for having the annular support of 4～6 spring steel columnar tooths, be fixed on the boring bar (12) by copper sheathing (38), rigid support (39) constitutes for 4～6 back-up blocks that are embedded in vertical keyway, and is fixing by the limited block (40) that is fixed on boring bar (12) end face.

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