CN210702829U - Pipe cutting machine capable of accurately positioning cutting intervals - Google Patents

Abstract

The utility model relates to a pipe cutting machine, in particular to pipe cutting machine of accurate positioning cutting interval, including frame, driving piece, pivot and cutting assembly, the frame is placed subaerial, the pivot level is placed and is connected around self axis rotation with the frame, the driving piece can drive the pivot and rotate, cutting assembly includes carriage, removal frame, cutting disc and removal subassembly, the carriage is connected with the frame, the removal frame is located the top of carriage, be provided with a plurality of stopper in the frame, the stopper is evenly spaced along the axial direction of pivot and is set up; be provided with the locating part on the carriage, the locating part can slide, remove or rotate with the butt and break away from the limiting block relative to the carriage, has reached the effect of accurate control cutting device cutting interval.

Description

Pipe cutting machine capable of accurately positioning cutting intervals

Technical Field

The utility model relates to a pipe cutting machine, in particular to accurate location cutting spaced pipe cutting machine.

Background

In the processing process of the stretching and winding film, the method is mainly divided into two parts, wherein one part is the molding and gluing of the adhesive tape film, the other part is the molding of the middle supporting tube of the stretching and winding film, and finally the glued adhesive tape film is wound on the peripheral surface of the supporting tube. In the process of processing the supporting tube, it is usually necessary to divide an integral raw material tube into a plurality of supporting tubes of the same specification, and the equipment used in the process is a tube cutting machine.

Pipe cutting machine among the prior art includes frame, driving piece, pivot, support box, chuck and cutting device, and the frame is placed subaerial, and the pivot passes through the horizontal axis rotation with the frame to be connected, and the driving piece is fixed in the frame and can drive the pivot and rotate, supports the box and places in the frame top, and the pivot passes support box and rotate with support box to be connected, and the chuck cover is fixed in the support box outside and the chuck is passed in the pivot. The cutting device comprises a sliding frame, a cutting driving piece, a cutting disc, a moving frame and a moving assembly, wherein the sliding frame is connected with the rack in an axial sliding mode along a rotating shaft, the moving frame is located above the sliding frame and is connected with the sliding frame in a sliding mode along the direction perpendicular to the rotating shaft, the moving assembly is used for driving the moving frame to slide relative to the sliding frame, the cutting disc is connected with the moving frame in a rotating mode, and the cutting driving piece is fixed above the moving frame and can drive the cutting disc to rotate. When the rotary shaft is used, the raw materials are sleeved on the rotary shaft, the raw materials are tightly pressed on the rotary shaft by using the chuck, and the driving piece is started and can drive the rotary shaft and the raw materials to rotate; then starting a cutting driving part, driving a cutting disc to rotate by the cutting driving part, driving a moving frame to move relative to the sliding frame by using a moving assembly, enabling the cutting disc to be close to the rotating shaft, and cutting off the raw material to form a supporting tube; after the primary cutting is finished, the sliding frame slides relative to the rack, and then other parts are cut.

The above prior art, in which the carriage is intermittently moved relative to the frame during the continuous cutting of the raw material, thereby changing the position of the cutting disc, has the disadvantage that the distance of movement of the carriage relative to the frame is determined entirely by the experience of the operator, the width of the cut support tube cannot be guaranteed to be consistent with the width of the adhesive tape film, and the wound adhesive tape has a quality defect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an accurate location cutting spaced pipe cutting machine has reached the effect of accurate control cutting device cutting interval.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a pipe cutting machine capable of accurately positioning and cutting intervals comprises a rack, a driving part, a rotating shaft and a cutting assembly, wherein the rack is placed on the ground, the rotating shaft is horizontally placed and is rotatably connected with the rack around the axis of the rotating shaft, the driving part can drive the rotating shaft to rotate, the cutting assembly comprises a sliding frame, a moving frame, a cutting disc and a moving assembly, the sliding frame is connected with the rack, the moving frame is positioned above the sliding frame, a plurality of limiting blocks are arranged on the rack, and the limiting blocks are uniformly arranged at intervals along the axial direction of the rotating shaft; be provided with the locating part on the carriage, the locating part can slide, remove or rotate with the butt and break away from the limiting block relative to the carriage.

By adopting the technical scheme, when the rotary shaft is used, the raw materials are sleeved on the rotary shaft, the driving piece is started, and the driving piece can drive the rotary shaft and the raw materials to rotate; then starting a cutting driving part, driving a cutting disc to rotate by the cutting driving part, driving a moving frame to move relative to the sliding frame by using a moving assembly, enabling the cutting disc to be close to the rotating shaft, and cutting off the raw material to form a supporting tube; at the in-process that removes the carriage relative to the frame, the locating part can with the stopper butt to the position of the relative frame of restriction and location carriage, and then the position at location cutting dish place, after the cutting was accomplished, utilize the relative carriage of locating part to slide, remove or rotate and make the locating part break away from the stopper temporarily, later relative frame removal carriage once more, the locating part is with the position at location cutting dish place with the stopper butt once more, so on and so on, realize the cutting interval of accurate control cutting dish to raw and other materials.

The utility model discloses further set up to: the locating part is the gag lever post, and the gag lever post pegs graft sliding fit with the carriage, and along with the grafting of gag lever post in the carriage, the gag lever post can with stopper butt or break away from.

Through adopting above-mentioned technical scheme, the gag lever post is extracted to the direction of keeping away from the stopper to relative carriage, and the carriage just can slide relative to the frame, later with the gag lever post after reseing, along with the relative frame slip of carriage, the gag lever post just can carry on spacingly with the stopper butt to confirm the cutting position of carriage, guarantee the precision.

The utility model discloses further set up to: one end of the limiting rod, which is close to the limiting block, is fixedly provided with a first limiting disc, and a reset spring is sleeved on the limiting rod between the first limiting disc and the sliding frame.

Through adopting above-mentioned technical scheme, after setting up first spacing dish and reset spring, after the gag lever post is extracted to the direction of keeping away from the stopper, the gag lever post can reset under reset spring's elastic force effect when loosening the gag lever post, promotes the convenient degree that the gag lever post used.

The utility model discloses further set up to: one end of the limiting rod, which is far away from the limiting block, is fixedly provided with a second limiting disc.

Through adopting above-mentioned technical scheme, under the limiting displacement of the spacing dish of second, can avoid reset spring's elasticity too big and pop out the carriage with the gag lever post slip.

The utility model discloses further set up to: a sliding rod is fixedly arranged on the rack and parallel to the rotating shaft, and limiting blocks are sleeved on the sliding rod and are in sliding connection with the sliding rod.

Through adopting above-mentioned technical scheme, after setting up the slide bar, the stopper can slide on the slide bar to adjust the interval between the stopper, with the cutting width who changes the stay tube.

The utility model discloses further set up to: the limiting block is linked to slide on the slide rod through a linkage mechanism.

By adopting the technical scheme, all the limiting blocks can be driven to synchronously move on the sliding rod by utilizing the limiting mechanism, so that the same distance between the limiting blocks is ensured, and the uniform adjustment is facilitated.

The utility model discloses further set up to: the linkage mechanism comprises a plurality of groups of cross rod groups, each cross rod group comprises two cross rods, the middle parts of the two cross rods are hinged, the end parts of the cross rods are hinged with the end parts of the cross rods in the adjacent cross rod groups, and the hinged shaft between the cross rods in each cross rod group is connected with a limiting block.

Through adopting above-mentioned technical scheme, when adjusting the position of a stopper on the slide bar, the interval between two stoppers can produce the change to utilize the interlock effect of crossbar to change the interval between all stoppers, realize the purpose of interval between the synchronous adjustment stopper.

The utility model discloses further set up to: the linkage mechanism further comprises an adjusting piece for driving the limiting block to slide on the sliding rod.

Through adopting above-mentioned technical scheme, utilize the regulating part to come the interval of automatically regulated between the stopper, comparatively use manpower sparingly.

The utility model discloses further set up to: the adjusting part is a screw rod, the screw rod is parallel to the rotating shaft and is rotatably connected with the rack, and the screw rod is in threaded connection with one limiting block.

Through adopting above-mentioned technical scheme, relative frame rotates the lead screw, and the lead screw can drive one of them stopper and remove along the slide bar to utilize link gear to change the interval between the stopper.

To sum up, the utility model discloses following technological effect has:

1. by arranging the limiting block and the limiting block, in the process of sliding the sliding frame relative to the rack, the relative position between the sliding piece and the rack can be controlled by utilizing the abutting limiting action of the limiting block and the limiting block, and the purpose of accurately positioning the cutting distance of the cutting device is achieved;

2. the sliding rod is arranged on the rack, so that the position of the limiting block on the sliding rod can be adjusted, and the purpose of changing the cutting distance of the cutting device is achieved;

3. by arranging the linkage mechanism between the limiting blocks, the relative positions between the limiting blocks can be uniformly adjusted.

Drawings

Fig. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the mobile assembly shown in detail;

FIG. 3 is a partial schematic view highlighting the linkage;

fig. 4 is an enlarged view of a portion a in fig. 1.

In the figure, 1, a frame; 11. a limiting block; 12. a slide bar; 13. a linkage mechanism; 131. a cross bar; 132. a screw rod; 14. a support frame; 141. a bearing groove; 2. a drive member; 3. a rotating shaft; 4. cutting the piece; 41. a carriage; 411. a baffle plate; 412. a limiting rod; 4121. a first limiting disc; 4122. a return spring; 4123. a second limiting disc; 42. a movable frame; 421. a fixing plate; 422. an abutting member; 423. a compression nut; 43. a cutting drive motor; 44. cutting the disc; 45. a moving assembly; 451. a moving gear; 452. moving the rack; 453. rotating the handle; 46. a sliding assembly; 461. a sliding gear; 462. a sliding rack; 463. rotating a hand wheel; 5. a support box; 6. a chuck.

Detailed Description

As shown in fig. 1, the utility model provides a pipe cutting machine of accurate cutting, including frame 1, driving piece 2, pivot 3, cutting member 4, support box 5 and chuck 6, frame 1 is placed subaerial, pivot 3 level are placed and rotate around self axis with frame 1 and are connected, driving piece 2 is fixed to be set up in frame 1 and can drive pivot 3 and rotate, support box 5 and place in frame 1, chuck 6 is fixed to be set up on supporting box 5, pivot 3 passes chuck 6 and support box 5, cutting assembly 4 sets up in frame 1. When using, at first overlap raw and other materials in pivot 3, utilize chuck 6 to compress tightly raw and other materials in pivot 3, start driving piece 5, driving piece 5 can drive pivot 3 and raw and other materials rotation, and support box 5 has played the effect of supporting pivot 3 and chuck 6, and cutting member 4 is then for cutting raw and other materials shaping stay tube. Of course, the supporting box 5 and the chuck 6 are mainly configured to support the rotating shaft 3 and fix the raw material sleeved on the rotating shaft 3, so that the raw material rotates with the rotating shaft 3, and in this embodiment, other fixing methods may be adopted, such as fixing the raw material and the rotating shaft 3 by bolts.

As shown in fig. 1, one end of the rotating shaft 3 is rotatably connected with the frame 1 through a self-aligning bearing, the other end of the rotating shaft 3 is provided with a supporting frame 14, the lower end of the supporting frame 14 is hinged to the frame 1 through a hinge shaft, a U-shaped bearing groove 141 is formed in the upper end of the supporting frame 14, a bearing is sleeved on the rotating shaft 3, and the bearing at the end can be clamped in the bearing groove 141. When the raw materials are installed or replaced, one end of the rotating shaft 3, which is close to the supporting frame 14, is lifted upwards, the supporting frame 14 is rotated and laid flat relative to the rack 1, and then the raw materials can be sleeved on the rotating shaft 3, or the rotating shaft 3 is taken down from the cut supporting tube.

As shown in fig. 3, the cutting assembly 4 includes a sliding frame 41, a moving frame 42, a cutting driving motor 43, a cutting disc 44 and a moving assembly 45, the sliding frame 41 is slidably connected with the frame 1 along a direction parallel to the rotating shaft 3, the moving frame 42 is located above the sliding frame 41, the cutting disc 44 is rotatably connected with the moving frame 42 through a horizontal shaft, and the cutting driving motor 43 is fixed above the moving frame and can drive the cutting disc 44 to rotate. The moving assembly 45 drives the moving frame 42 to move relative to the sliding frame 41, the moving frame 42 can drive the cutting driving motor 43 and the cutting disc 44 to move towards the rotating shaft 3, and the cutting driving motor 43 is started to drive the cutting disc 44 to rotate so as to cut the raw material on the rotating shaft 3 into support tubes in sections; after the first cutting is completed, the carriage 42 is returned to slide the carriage 41 with respect to the frame 1, and the operation is repeated to perform the multi-stage cutting.

As shown in fig. 2, in order to avoid the cutting disc 44 from moving excessively to cut the rotating shaft 3, a baffle 411 may be fixedly disposed on the sliding frame 41, a fixed plate 421 may be fixedly disposed on the moving frame 42, the fixed plate 421 is located on a side of the baffle 411 away from the rotating shaft 3, an abutting piece 422 may be connected to the fixed plate 421, and the abutting piece 422 may abut against the baffle 411. Along with the relative carriage 41 slip of removal frame 42, final butt piece 422 and baffle 411 butt spacing guarantee that cutting disc 44 can not contact pivot 3, realize the purpose of accurate control cutting disc 44 cutting depth.

As the cutting disc 44 is worn away as the cutting is performed, the diameter of the cutting disc 44 is reduced as the cutting disc 44 is worn away, and at this time, when the abutting piece 422 abuts against the baffle 411, the cutting disc 44 cannot completely cut and break the raw material, so that only the cutting disc 44 can be replaced, which is high in cost. At this time, if the structure shown in fig. 2 is adopted, the abutting piece 422 is set as a bolt, the abutting piece 422 is in threaded connection with the fixing plate, the distance that the abutting piece 422 extends out of the fixing plate 421 can be adjusted, so that the distance between the baffle 411 and the fixing plate 421 when the abutting piece 422 abuts against the baffle 411 is adjusted, namely, the distance between the center of the cutting disc 44 and the rotating shaft 3 can be adjusted, when the cutting disc 44 is worn, the cutting depth of the cutting disc 44 can be adjusted in time, and the utilization rate of the cutting disc 44 is improved. The abutting member 422 may further have a pressing nut 423 screwed on a side of the fixing plate 421 away from the baffle 411, so as to improve the tightness of the screwed connection between the abutting member 422 and the fixing member 421, and ensure the stability of the positions of the abutting member 422 and the fixing member 421.

There are various forms of the moving member 45, such as an air cylinder, etc., and the present embodiment adopts the following structure. As shown in fig. 2, the moving assembly 45 includes a moving gear 451 and a moving rack 452 engaged with each other, the moving rack 452 is fixed below the moving frame 42 and the moving rack 452 extends perpendicular to the rotating shaft 3, and the moving gear 451 is rotatably connected to the sliding frame 41. By rotating the moving gear 451, the moving gear 451 can drive the moving rack 452 to move relative to the moving gear 451, so that the moving rack 42 moves towards or away from the rotating shaft 3 relative to the sliding rack 41.

As shown in fig. 3, the driving member for slidably connecting the sliding frame 41 and the frame 1 is a sliding assembly 46, and the sliding assembly 46 has various practical structures as long as the sliding frame 41 can be driven to slide relative to the frame 1. The sliding assembly 46 includes a sliding gear 461 and a sliding rack 462 engaged with each other, the sliding rack 462 is fixedly disposed on the frame 1 along a direction parallel to the rotating shaft 3, and the sliding gear 461 is rotatably connected with the sliding frame 41. When the sliding gear 461 is rotated, the sliding gear 461 and the sliding rack 462 move relatively, thereby driving the sliding rack 41 to slide along the axial direction of the rotating shaft 3 relative to the frame 1, changing the cutting position of the cutting disc 44, and cutting the raw material in multiple stages.

As shown in fig. 3, in order to facilitate the rotation of the moving gear 451, a rotating handle 453 may be fixedly provided at an outer end of a gear shaft of the moving gear 451, and a rotating hand wheel 463 may be fixedly provided at an outer end of a gear shaft of the sliding gear 461.

During the multi-stage cutting process, the sliding frame 41 is driven to move relative to the frame 1 by the sliding assembly 46, and the width of the moving distance of the sliding frame 41 influences the width of the support tube to be cut. In order to accurately position the cutting space, the following structure is designed, as shown in fig. 3, a plurality of limiting blocks 11 are arranged on the frame 1, and the limiting blocks 11 are uniformly arranged at intervals along the axial direction of the rotating shaft 3; the carriage 41 is provided with a stopper that can slide, move, or rotate relative to the carriage 41 to abut against and separate from the stopper 11. In the process of moving the sliding frame 41 relative to the machine frame 1, the limiting member can abut against the limiting block 11, so as to limit and position the position of the sliding frame 41 relative to the machine frame 1, and further position the position of the cutting disc 44, after the cutting is completed, the limiting member slides, moves or rotates relative to the sliding frame 41 so as to temporarily separate the limiting member from the limiting block 11, then the sliding frame 41 is moved relative to the machine frame 1 again, the limiting member abuts against the limiting block 11 again so as to position the position of the cutting disc 44, and so on, and the cutting distance of the cutting disc 44 to the raw material is accurately controlled.

The types and structures of the stopper are very many, and the stopper can be brought into contact with and separated from the stopper 11. As shown in fig. 4, the limiting member is a limiting rod 412, the limiting rod 412 is inserted into the sliding frame 41 for sliding fit, and the limiting rod 412 can be abutted against or separated from the limiting member 11 along with the insertion of the limiting rod 412 in the sliding frame 41. Relative carriage 41 is to keeping away from the direction of stopper 11 and extracting the gag lever post 412, and carriage 41 just can slide relative to frame 1, later with gag lever post 412 after reseing, along with carriage 41 slides relative to frame 1, gag lever post 412 just can carry out spacingly with stopper 11 butt to confirm the cutting position of carriage 41, guarantee the precision.

As shown in fig. 4, a first limiting plate 4121 is fixedly disposed at an end of the limiting rod 412 close to the limiting block 11, a return spring 4122 is sleeved on the limiting rod 412 between the first limiting plate 4121 and the sliding frame 41, and a second limiting plate 4123 is fixedly disposed at an end of the limiting rod 412 far from the limiting block 11. After the first limiting plate 4121 and the return spring 4122 are arranged, after the limiting rod 412 is pulled out in the direction away from the limiting block 11, when the limiting rod 412 is loosened, the limiting rod 412 can be reset under the elastic force of the return spring 4122, the use convenience degree of the limiting rod 412 is improved, and under the limiting action of the second limiting plate 4123, the limiting rod 412 can be prevented from being ejected out of the sliding frame 41 in a sliding mode due to the fact that the elasticity of the return spring 4122 is too large.

Since the support tube may have a variable cut width due to the different widths of the stretch wrap films, the cut width of the cutting plate 44 to the raw material should also be varied to improve the adaptability of the apparatus. Therefore, as shown in fig. 3, a sliding rod 12 may be fixedly disposed on the frame 1, the sliding rod 12 is parallel to the rotating shaft 3, and the limiting blocks 11 are all sleeved on the sliding rod 12 and slidably connected with the sliding rod 12. After the slide bar 12 is provided, the stoppers 11 can slide on the slide bar 12, so that the distance between the stoppers 11 is adjusted to change the cutting width of the support tube.

Only by adopting the structure, the width between the limiting blocks 11 needs to be measured, adjusted and fixed one by one, which is tedious, so as to be convenient for operation, as shown in fig. 3, a linkage mechanism 13 can be arranged to drive the limiting blocks 11 to be linked to synchronously adjust the distance between the limiting blocks 11. The linkage mechanism 13 includes a plurality of cross bar sets and adjusting members, the cross bar set includes two cross bars 131, the middle parts of the two cross bars 131 are hinged, the end parts of the cross bars 131 are hinged with the end parts of the cross bars 131 in the adjacent cross bar sets, the hinge shaft between the cross bars 131 in each cross bar set is connected with a limiting block 11, and the adjusting members are used for driving the limiting blocks 11 to slide on the sliding rods 12. When the position of one limiting block 11 on the sliding rod 12 is adjusted by the adjusting piece, the distance between the two limiting blocks 11 is changed, so that the distance between all the limiting blocks 11 is changed by the linkage action of the cross rod 131, and the purpose of synchronously adjusting the distance between the limiting blocks 11 is realized.

As shown in fig. 3, the adjusting member is a screw 132, the screw 132 is parallel to the rotating shaft 3 and is rotatably connected to the frame 1, and the screw 132 is threadedly connected to one of the limiting blocks 11. The screw rod 132 is rotated relative to the frame 1, and the screw rod 132 can drive one of the limiting blocks 11 to move along the sliding rod 12, so that the distance between the limiting blocks 11 is changed by the linkage mechanism 13.

The utility model discloses a theory of operation does:

the screw rod 132 is rotated in advance, the screw rod 132 drives one of the limiting blocks 11 to move along the sliding rod 12, so that the distance between the limiting blocks 11 is changed by the linkage mechanism 13, and the distance between the limiting blocks 11 is adjusted to a required position. With raw and other materials cover in pivot 3, utilize chuck 6 to compress tightly raw and other materials in pivot 3, start driving piece 5, driving piece 5 can drive pivot 3 and raw and other materials and rotate, supports box 5 and has played the effect of supporting pivot 3 and chuck 6.

Starting the cutting driving motor 43 to drive the cutting disc 44 to rotate, rotating the moving gear 451, and the moving gear 451 can drive the moving rack 452 to move relative to the moving gear 451, so that the moving rack 42 moves relative to the sliding rack 41 towards the rotating shaft 3, and as the moving rack 42 approaches the rotating shaft 3, the cutting disc 44 gradually cuts the raw material; then, the moving frame 42 is reset, the limiting rod 412 is pulled out in the direction away from the limiting block 11 relative to the sliding frame 41, the sliding gear 461 is rotated, the sliding gear 461 and the sliding rack 462 move relatively, so that the sliding frame 41 is driven to slide along the axis direction of the rotating shaft 3 relative to the rack 1, after the limiting rod 412 is reset, along with the sliding of the sliding frame 41 relative to the rack 1, the limiting rod 412 can be abutted against the limiting block 11 for limiting, the cutting position of the sliding frame 41 is determined, and the accuracy is guaranteed. Repeating the operation until the raw materials are completely cut.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides an accurate location cutting spaced pipe cutting machine, which comprises a frame (1), driving piece (2), pivot (3) and cutting assembly (4), frame (1) is placed subaerial, pivot (3) level is placed and is connected around self axis rotation with frame (1), driving piece (2) can drive pivot (3) and rotate, cutting assembly (4) include carriage (41), remove frame (42), cutting disc (44) and removal subassembly (45), carriage (41) are connected with frame (1), it is located the top of carriage (41) to remove frame (42), a plurality of stopper (11) are provided with on frame (1), stopper (11) are along the even interval setting of axial direction of pivot (3); the sliding frame (41) is provided with a limiting piece, and the limiting piece can slide or rotate relative to the sliding frame (41) to abut against and separate from the limiting piece (11).

2. The pipe cutting machine for accurately positioning the cutting interval according to claim 1, wherein the position limiting member is a position limiting rod (412), the position limiting rod (412) is inserted into the sliding frame (41) in a sliding fit manner, and the position limiting rod (412) can be abutted against or disengaged from the position limiting member (11) along with the insertion of the position limiting rod (412) into the sliding frame (41).

3. The pipe cutting machine capable of accurately positioning the cutting interval as claimed in claim 2, wherein a first limiting plate (4121) is fixedly arranged at one end of the limiting rod (412) close to the limiting block (11), and a return spring (4122) is sleeved on the limiting rod (412) between the first limiting plate (4121) and the sliding frame (41).

4. The pipe cutting machine capable of accurately positioning the cutting interval according to claim 3, wherein a second limiting plate (4123) is fixedly arranged at one end of the limiting rod (412) far away from the limiting block (11).

5. The pipe cutting machine capable of accurately positioning the cutting interval according to claim 1, wherein a sliding rod (12) is fixedly arranged on the frame (1), the sliding rod (12) is parallel to the rotating shaft (3), and the limiting blocks (11) are sleeved on the sliding rod (12) and are slidably connected with the sliding rod (12).

6. The pipe cutting machine capable of accurately positioning the cutting intervals according to claim 5, wherein the limiting block (11) is linked to slide on the sliding rod (12) through a linkage mechanism (13).

7. The pipe cutting machine capable of accurately positioning the cutting interval according to claim 6, wherein the linkage mechanism (13) comprises a plurality of cross rod sets, each cross rod set comprises two cross rods (131), the middle parts of the two cross rods (131) are hinged, the end parts of the cross rods (131) are hinged with the end parts of the cross rods (131) in the adjacent cross rod sets, and the hinged shaft between the cross rods (131) in each cross rod set is connected with a limiting block (11).

8. The pipe cutting machine with accurate positioning of the cutting interval as claimed in claim 7, characterized in that said linkage mechanism (13) further comprises an adjusting member for driving the stopper (11) to slide on the sliding rod (12).

9. The pipe cutting machine capable of accurately positioning the cutting interval according to claim 1, wherein the adjusting member is a screw rod (132), the screw rod (132) is parallel to the rotating shaft (3) and is rotatably connected with the frame (1), and the screw rod (132) is in threaded connection with one of the limiting blocks (11).

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