CN212239293U

CN212239293U - Pipe groove combined tool rest for radial drilling machine

Info

Publication number: CN212239293U
Application number: CN202020227697.7U
Authority: CN
Inventors: 赵保柱; 颜嘉琪
Original assignee: Taishan Group Co ltd
Current assignee: Taishan Group Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-12-29
Anticipated expiration: 2030-02-28

Abstract

A pipe groove combined tool rest for a radial drilling machine comprises a tool bar, wherein an outer tool rest and an inner cutting tool mounting square hole are arranged on the lower portion of the tool bar, and a centering device is arranged below the outer tool rest and the inner cutting tool mounting square hole at the lower end of the tool bar. The cutter bar centering device adopts the combination of the bearing and the cutter bar, so that the abrasion between the centering device and the cutter bar and the abrasion between the centering device and the inner wall of the pipe can be reduced, and the centering precision is higher. And the cutter bar is provided with an inner cutter frame and an outer cutter frame in the radial direction, so that the double functions of machining an outer groove and internally thinning can be realized by one cutter bar. The processing precision and the processing efficiency of the pipe end groove are improved.

Description

Pipe groove combined tool rest for radial drilling machine

Technical Field

The utility model relates to a drilling machine, concretely relates to pipe groove combination knife rest for radial drill.

Background

In boiler manufacturing, pipe butt joint is a common welding type, and is influenced by a product design structure, and inner and outer groove processing needs to be carried out on a pipe end. In the boiler product, a plurality of header tanks, boiler barrels and other parts are provided with pipe joints with the diameter phi of 100 mm-300 mm, the pipe ends are subjected to groove processing after water pressure is needed, and the workpieces have large volume, heavy weight and complex shape, the conventional processing mode mostly adopts a boring machine to carry out inner thinning or outer groove processing, a radial drilling machine is used for carrying out pipe end outer groove processing, the groove processing of the boring machine is complicated, the equipment cost is high, while the pipe groove tool rest of the prior radial drilling machine is shown in figure 1-2, the upper end of a tool bar 1 is connected with the radial drilling machine through Morse taper, two outer tool holders 4 which are of a symmetrical structure are welded on the middle lower portion of the tool bar 1, the lower portion of the tool bar 1 is a cylinder, external threads are arranged at the lower end of the cylinder and matched with nuts, an inner hole of the positioning sleeve 6 is slightly larger than the diameter of the cylinder on the lower portion of the tool bar 1 to form clearance fit, the inner hole of the positioning sleeve is sleeved on the cylinder on the lower portion of the tool bar 1, and the outer tool holders are fixed. When the pipe outer bevel processing device works, the size of the pressing cutter cushion block 2 is adjusted according to the outer diameter of a pipe so as to meet the requirement of the outer diameter of the pipe, and the positioning sleeve 6 is inserted into the inner wall of the pipe to be processed to process the outer bevel of the pipe. By using the combined tool rest, only an outer groove can be processed, and two problems exist in the actual use process: firstly, the positioning sleeve 6 is easy to wear, and the positioning deviation is large and the groove is irregular due to serious wear of the positioning sleeve 6, so that the welding quality is influenced; secondly, the machining of thinning the inside of the pipe cannot be carried out.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pipe groove combination knife rest for radial drill aims at solving the problem that the easy wearing and tearing of knife rest centring means influence groove machining quality and can only process outer groove in the pipe joint groove machining on parts such as header, drum in the boiler product.

The technical solution of the utility model is that a pipe groove combined tool rest for radial drill, it includes the cutter arbor, is provided with outer knife rest and interior cutting tool installation square hole in the cutter arbor lower part, is provided with centring means below the cutter arbor lower extreme lies in outer knife rest and interior cutting tool installation square hole.

The specific characteristics of this scheme are in addition, centring means includes centering sleeve and the bearing of suit on the cutter arbor, and the centering sleeve is the ring form component of cavity and built-in bearing the cutter arbor lower extreme sets gradually the fixed shaft shoulder of using of retaining ring in the bearing, and the screw rod is used to cylinder and fixing bearing retaining ring for the fixing bearing the cover is equipped with the retaining ring above the screw rod is used to the fixing bearing retaining ring, and the axial displacement of fixing bearing retaining ring is restricted to screw rod and a nut cooperation for the retaining ring.

The centering sleeve is provided with a bearing hole in the center of the upper part, a bearing is arranged in the bearing hole, two threaded through holes are radially tapped at the position of the bearing hole by the centering sleeve, a set screw is arranged in each threaded through hole, a through hole communicated with the bearing hole is processed at the center of the lower part of the centering sleeve, and a step formed between each through hole and the corresponding bearing hole presses an outer retainer ring of the bearing. The bearing inner retainer ring fixing shaft shoulder is arranged below the inner cutting tool mounting square hole on the cutter bar and corresponds to the bearing inner retainer ring, the bearing inner retainer ring fixing shaft shoulder and the bearing retainer ring are distributed on two sides of the bearing inner retainer ring, and the bearing retainer ring, the nut and the bearing inner retainer ring fixing shaft shoulder are jointly used for fixedly connecting the bearing inner retainer ring and the cutter bar together.

The outer edge of the lower part of the centering sleeve is processed with a conical surface.

And a spring washer is arranged between the retainer ring and the nut in the bearing.

An inner cutting tool mounting square hole is formed in the radial position of the cutter bar, an inner groove turning tool is mounted on the cutter bar, an inner cutting tool pressing bolt hole with an internal thread is formed in the cutter bar, and an inner tool pressing bolt is mounted in the inner cutting tool pressing bolt hole.

The included angle between the inner cutting tool pressing bolt hole and the inner cutting tool mounting square hole is 90 degrees.

An outer cutter holder is fixedly arranged on the cutter bar in the radial direction, and an outer cutter pressing bolt is fixedly arranged on the outer cutter holder. The outer tool rest is provided with a tool groove, and the outer tool rest is provided with a threaded through hole connected with the tool groove.

The upper end of the cutter bar is a taper rod, and the taper is Morse taper.

Compared with the prior art, the beneficial effects of the utility model are that: the centering sleeve of the utility model is connected with the cutter bar through the bearing, and the friction is reduced in the centering process of pipe end groove processing, thereby reducing the abrasion of the centering device, ensuring more accurate centering and longer service life; the utility model is provided with the outer cutter frame and the inner thinning cutter fixing device, can perform pipe end inner thinning, pipe end outer groove processing, pipe end face flat opening and the like, has convenient operation and high processing precision, and improves the production efficiency; the utility model discloses to the pipe of different specifications, only need to change centering sleeve just applicable in phi 100-phi 300 pipe, save the knife rest cost, improve production efficiency.

Drawings

FIG. 1 shows a pipe bevel tool holder for a conventional radial drill. Fig. 2 is a view a-a of fig. 1. FIG. 3 is a schematic structural view of a pipe groove combined tool rest for a radial drilling machine. Fig. 4 is a view B-B in fig. 3. Fig. 5 is a schematic view of the tool bar.

In the figure: 1-a cutter bar; 2-pressing a cutter cushion block; 3-an external groove turning tool; 4-outer tool holder; 5-pressing the cutter bolt with the outer cutter; 6-positioning sleeve; 7-a nut; 8-a tube; 9-inner cutter pressing bolt; 10-inner groove turning tool; 11-cylindrical roller bearings; 12-set screws; 13-centering sleeve; 14-a bearing retainer ring; 15-inner bearing retainer ring; 16-bearing outer retainer ring; 17-tool bar morse shank; 18-inner cutting tool mounting square hole; 19-inner cutting tool pressing bolt hole; 20-a shaft shoulder for fixing the inner retainer ring of the bearing; 21-cylinder for fixing bearing; 22-fixing a screw rod for a bearing retainer ring; 23-connecting the outer cutter frame with the cutter bar for welding; 24-spring washer.

Detailed Description

As shown in fig. 3 and 4, the pipe groove combined tool rest for the radial drilling machine comprises a tool bar 1, wherein an outer tool rest 4 and an inner cutting tool mounting square hole 18 are arranged at the lower part of the tool bar 1, and a centering device is arranged at the lower end of the tool bar 1 and below the outer tool rest 4 and the inner cutting tool mounting square hole 18.

The centering device includes centering sleeve 13 and the bearing of suit on cutter arbor 1, and the bearing is cylindrical roller bearing 11, and centering sleeve 13 is the ring form component of cavity and built-in bearing 1 lower extreme sets gradually the fixed shoulder 20 of using of retaining ring in the bearing, and the fixed bearing is with cylinder 21 and fixed bearing is threaded rod 22 for the retaining ring the cover is equipped with retaining ring 14 above the threaded rod 22 for the retaining ring, and the axial displacement of retaining ring is restricted to the cooperation of threaded rod 22 for the retaining ring and a nut 7.

The centering sleeve 13 is processed with a bearing hole in the upper center position, a bearing is installed in the bearing hole, two thread through holes are radially tapped at the bearing hole position by the centering sleeve 13, a set screw 12 is installed in each thread through hole, a through hole communicated with the bearing hole is processed at the center position of the lower portion of the centering sleeve 13, and a bearing outer check ring is pressed by a step formed between each through hole and the corresponding bearing hole. The cutter bar 1 is provided with a bearing inner retainer ring fixing shaft shoulder 20 corresponding to the bearing inner retainer ring 15 below the inner cutting tool mounting square hole 18, the bearing inner retainer ring fixing shaft shoulder 20 and the bearing retainer ring 14 are distributed on two sides of the bearing inner retainer ring 15, and the bearing retainer ring 14, the nut 7 and the bearing inner retainer ring fixing shaft shoulder 20 jointly realize that the bearing inner retainer ring 15 is fixedly connected with the cutter bar 1.

And a conical surface is processed on the outer edge of the lower part of the centering sleeve 13.

A spring washer 24 is arranged between the inner bearing ring 15 and the nut 7.

An inner cutting tool mounting square hole 18 and an inner bevel turning tool 10 are arranged at the radial position on the cutter bar 1, an inner cutting tool pressing bolt hole 19 with internal threads is arranged on the cutter bar 1, and an inner cutter pressing bolt 9 is arranged in the inner cutting tool pressing bolt hole 19.

The included angle between the inner cutting tool pressing bolt hole 19 and the inner cutting tool mounting square hole is 90 degrees.

An outer cutter holder 4 is fixedly arranged on the cutter bar 1 in the radial direction, and an outer cutter pressing bolt 5 is fixedly arranged on the outer cutter holder 4. The outer cutter frame 4 is provided with a cutter groove, and the outer cutter frame 4 is provided with a threaded through hole connected with the cutter groove.

The upper end of the cutter bar 1 is a taper rod, and the taper is Morse taper.

When the centering device is used, the cutter bar 1 and the centering sleeve 13 (the outer diameter of the centering sleeve 13 is determined according to the inner diameter of the pipe joint reduced by 1mm, the lower part of the centering sleeve 13 is made into a chamfer slope structure for facilitating the smooth insertion of the centering sleeve 13 into a pipe wall) are fixedly connected with the bearing outer check ring 16 through the fastening screw 12, and the centering sleeve 13 and the cutter bar form a whole because the bearing inner check ring 15, the bearing inner check ring for fixing the shaft shoulder 20 and the bearing check ring 14 are screwed and fixed through the screwing nut 7, and the centering sleeve 13 can rotate freely, so that friction cannot be formed between the centering sleeve 13 and the inner wall of the pipe.

The outer groove of pipe processing is as shown in fig. 3, outer slide lathe tool 3 is put into outer knife rest 4, and it is fixed with pressing sword cushion 2 through outer sword pressing sword bolt 5, radial drill is connected through cutter arbor morse handle of a knife 17 with cutter arbor 1, centering sleeve 13 stretches into in the pipe 8, 8 inner walls of pipe are hugged closely to centering sleeve 13 outer wall, thereby it is coaxial with the knife rest center to keep pipe 8 center throughout in rotatory process, thereby play the centering effect, and because cylindrical roller bearing 11's reason does not produce the friction, thereby make outer slide lathe tool 3 accomplish the processing to the outer groove of pipe under the radial drill drives.

The inner bevel turning tool 10 is placed in an inner cutting tool mounting square hole 18 of a cutter bar, the pressing tool position of the inner bevel turning tool 10 is adjusted according to the inner diameter of the pipe 8 and is fixed through an inner tool pressing tool bolt 9, the centering method is consistent with the centering method of outer bevel machining, and the inner bevel turning machining of the pipe is completed under the driving of a radial drilling machine.

Claims

1. A pipe groove combined tool rest for a radial drilling machine comprises a tool bar, and is characterized in that an outer tool rest and an inner cutting tool mounting square hole are arranged at the lower part of the tool bar, and a centering device is arranged at the lower end of the tool bar and below the outer tool rest and the inner cutting tool mounting square hole; the centering device comprises a centering sleeve and a bearing which are sleeved on the cutter bar, the centering sleeve is a hollow circular ring-shaped member and a built-in bearing, the lower end of the cutter bar is sequentially provided with a shaft shoulder for fixing a retaining ring in the bearing, a cylinder for fixing the bearing and a screw for fixing the bearing retaining ring, the screw for fixing the bearing retaining ring is sleeved with a bearing retaining ring, and the screw for fixing the bearing retaining ring is matched with a nut to limit the axial movement of the centering sleeve.

2. The pipe groove combined tool rest for the radial drilling machine as claimed in claim 1, wherein a bearing hole is formed in the center of the upper portion of the centering sleeve, a bearing is installed in the bearing hole, two threaded through holes are radially tapped at the position of the bearing hole of the centering sleeve, a set screw is installed in each threaded through hole, a through hole communicated with the bearing hole is formed in the center of the lower portion of the centering sleeve, and a step formed between each through hole and the corresponding bearing hole presses an outer retainer ring of the bearing; the bearing inner retainer ring fixing shaft shoulder is arranged below the inner cutting tool mounting square hole on the cutter bar and corresponds to the bearing inner retainer ring, the bearing inner retainer ring fixing shaft shoulder and the bearing retainer ring are distributed on two sides of the bearing inner retainer ring, and the bearing retainer ring, the nut and the bearing inner retainer ring fixing shaft shoulder are jointly used for fixedly connecting the bearing inner retainer ring and the cutter bar together.

3. The pipe groove combined tool rest for the radial drilling machine as claimed in claim 2, wherein a conical surface is formed on the outer edge of the lower portion of the centering sleeve.

4. The tool post for pipe beveling of a radial drilling machine according to claim 2, wherein a spring washer is provided between the retainer ring and the nut in the bearing.

5. The pipe bevel compound tool post for the radial drill according to claim 1, wherein an inner cutting tool mounting square hole is formed in the radial position of the tool bar and an inner bevel turning tool is mounted, an inner cutting tool pressing bolt hole having an internal thread is formed in the tool bar, and an inner cutting tool pressing bolt is mounted in the inner cutting tool pressing bolt hole.

6. The pipe groove combined tool rest for the radial drilling machine as claimed in claim 5, wherein an included angle between the inner cutting tool pressing bolt hole and the inner cutting tool mounting square hole is 90 °.

7. The pipe groove combined tool rest for the radial drilling machine as claimed in claim 1, wherein an outer tool rest is fixedly mounted on the tool bar in the radial direction, and an outer tool pressing bolt is fixedly arranged on the outer tool rest; the outer tool rest is provided with a tool groove, and the outer tool rest is provided with a threaded through hole connected with the tool groove.

8. The pipe groove combined tool rest for the radial drilling machine as claimed in claim 1, wherein the upper end of the tool bar is a taper bar, and the taper is morse taper.