CN113305240A

CN113305240A - Steel bar cutting device for constructional engineering

Info

Publication number: CN113305240A
Application number: CN202110613654.1A
Authority: CN
Inventors: 徐莉; 郑绍富
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2021-08-27

Abstract

The invention discloses a steel bar cutting device for constructional engineering, and relates to the technical field of constructional engineering. It comprises a hand-held casing; the front part of the handheld machine shell is provided with an installation through hole along the left-right direction, and the rear part of the handheld machine shell is fixed with a handle; the right side of the middle part of the handheld machine shell is provided with a gear bin; the front end of the gear bin is communicated with the rear end of the mounting through hole; a rotary cutting mechanism is arranged inside the mounting through opening; the rotary cutting mechanism comprises a bearing ring arranged in the mounting through opening and a supporting bearing sleeved and fixed on the left side of the mounting through opening; the left part of the bearing ring is fixedly sleeved on the inner side of the supporting bearing, and the right part of the bearing ring is fixedly sleeved with a transmission toothed ring; sliding sleeves are respectively fixed at the front end and the rear end of the inner wall of the bearing ring. The invention has the beneficial effects that: the steel bar connecting device can enable subsequent threading processing to be more convenient, simplify the operation procedures before steel bar connection and improve the working efficiency.

Description

Steel bar cutting device for constructional engineering

Technical Field

The invention relates to the technical field of constructional engineering.

Background

When steel bars are used in constructional engineering, mechanical connection is sometimes needed to be adopted to connect the steel bars end to end in sequence, in order to ensure the connection stability, a steel bar threading machine is generally adopted to thread the end parts of the steel bars, and then a threaded sleeve is adopted to connect the two steel bars together.

Before the reinforcing steel bar is used, the reinforcing steel bar needs to be cut into a proper length, the existing cutting mode generally adopts mechanical shearing or cutting piece rotating cutting, however, the two modes have obvious defects and cause adverse effects on the subsequent mechanical connection process of the reinforcing steel bar.

The mechanical shearing mode is easy to cause the ends of the steel bars to deform seriously, so that the processing of threading is inconvenient, the ends of the two connected steel bars cannot be aligned, and the structural strength is seriously influenced after the two connected steel bars are connected by using a threaded sleeve; although the reinforcing steel bar that adopts the cutting piece to cut off warp less, nevertheless produce marginal burr easily, be unfavorable for mantle fiber processing equally, this kind of mode is owing to be that circular cutting piece realizes the cutting with the curved reinforcing steel bar contact of outer wall, leads to cutting machine control unstability easily in addition, causes cutting piece off tracking (especially hand-held type cutting machine), and it is askew not only to cut the reinforcing steel bar end easily, leads to two reinforcing steel bar ends to align equally, structural strength when influencing the steel bar connection, but also has the potential safety hazard.

Due to the defects of the two modes, at present, after the reinforcing steel bars are cut off, two processes are required, namely a reinforcing steel bar end rounding process (the deformed reinforcing steel bar end is adjusted to be qualified in roundness) and a reinforcing steel bar end surface grinding process, so that the mechanical strength of the integral structure after the reinforcing steel bars are connected is ensured. This results in a cumbersome operation process, long time consumption and an influence on the construction efficiency of the construction project.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a steel bar cutting device for constructional engineering, which can facilitate subsequent threading processing, simplify the operation procedures before steel bar connection and improve the working efficiency.

The technical scheme adopted by the invention is as follows: provided is a reinforcing steel bar cutting device for construction engineering, comprising a hand-held casing; the front part of the handheld machine shell is provided with an installation through hole along the left-right direction, and the rear part of the handheld machine shell is fixed with a handle; the right side of the middle part of the handheld machine shell is provided with a gear bin; the front end of the gear bin is communicated with the rear end of the mounting through hole; a rotary cutting mechanism is arranged inside the mounting through opening;

the rotary cutting mechanism comprises a bearing ring arranged in the mounting through opening and a supporting bearing sleeved and fixed on the left side of the mounting through opening; the left part of the bearing ring is fixedly sleeved on the inner side of the supporting bearing, and the right part of the bearing ring is fixedly sleeved with a transmission toothed ring; sliding sleeves are respectively fixed at the front end and the rear end of the inner wall of the bearing ring; the sliding sleeve is arranged along the radial direction of the bearing ring; the sliding sleeves are respectively connected with pushing blocks in a sliding manner; a convex arc-shaped tool bit A is fixed at the rear end of the push block at the front side; a concave arc-shaped cutter head B is fixed at the front end of the push block at the rear side; the cutter head A and the cutter head B are correspondingly matched; the bearing ring is provided with a centering control mechanism for enabling the cutter head A and the cutter head B to synchronously move in opposite directions; a transmission mechanism for driving the bearing ring to rotate is arranged in the gear bin;

the centering control mechanism comprises an extension rod which is arranged below the push block on the front side in parallel; the front end of the extension rod is fixed with the lower end of the push block at the front side through a support; racks are fixed at the lower end of the push block at the rear side and the rear part of the upper end of the extension rod; the two racks are corresponding; a bracket is fixed on the inner wall of the bearing ring; the bracket is rotatably connected with a synchronous gear; the synchronous gear is positioned between the two racks; the two racks are meshed and connected with the synchronous gear; a pressure spring is arranged in the sliding sleeve at the rear side; the push block at the rear side is connected with the inner wall of the bearing ring through a pressure spring;

the transmission mechanism comprises a driving motor fixed at the left end of the handheld shell; a control switch of the driving motor is arranged on the handheld shell; the output end of the driving motor penetrates into the gear bin rightwards and is fixedly sleeved with a driving gear; the driving gear is meshed with the transmission gear ring.

Further optimizing the technical scheme, the cutter head A and the cutter head B of the steel bar cutting device for the constructional engineering are both composed of a supporting part and a cutting part; the inner end of the push block is provided with a slot; the supporting part is correspondingly inserted into the slot; the supporting part is provided with a positioning hole; the push block is inserted with a locking bolt; the locking bolt is in threaded connection with the positioning hole correspondingly.

Further optimize this technical scheme, the left and right sides at the middle part of the upper truncation portion front end of the cutter head A of the steel bar cutting device for constructional engineering is connected with the chamfer resection block of half circular cone respectively.

Further optimize this technical scheme, the steel bar cutting device's that building engineering used holds formula casing upper and lower both ends and all is fixed with the abrasive disc.

The invention has the beneficial effects that:

1. the steel bar can penetrate into the bearing ring, the driving gear is meshed with the transmission gear ring, the bearing ring is sleeved and fixed in the support bearing, and the bearing ring can be driven to rotate under the action of the driving motor, so that the cutter head A and the cutter head B rotate; the push block at the rear side can slide forwards along the sliding sleeve through the elasticity of the pressure spring, the rack at the lower end of the push block at the rear side can move forwards, and the synchronous gear is positioned between the two racks and the two racks are meshed and connected with the synchronous gear, so that the push block at the front side can be driven to move backwards, the cutter head A and the cutter head B can synchronously move towards each other, and the rotary cutting of the reinforcing steel bars is realized;

the synchronous phase through A tool bit and B tool bit removes to and A tool bit and B tool bit are corresponding complex convex arc and concave arc's setting respectively, and the stationarity is good during the feasible cutting reinforcing bar, the stability is high, difficult emergence cutting off tracking with cut askew problem, effectively reduce the operation degree of difficulty, greatly alleviate the deformation problem of reinforcing bar cutting back tip moreover.

2. The supporting part is correspondingly inserted into the slot and can be fixed with the push block through a locking bolt, so that the A cutter head and the B cutter head can be conveniently installed and replaced; the flat cutting part can ensure that the end face of the cut steel bar has good flatness, so that the ends of the steel bar can be aligned conveniently; the left and right sides at the middle part of the front end of the flat cutting part on the cutter head A are respectively connected with a semicircular conical chamfer cutting block, the end edge after the steel bar is cut can be chamfered through the chamfer cutting block, the problem of edge burrs is effectively removed, and the threading machining process and the installation process of the threaded sleeve are more convenient. The end face after the reinforcing steel bar is cut can be further polished through the abrasive disc, and the flatness of the end face is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the left side view of FIG. 1;

fig. 3 is an exploded view of the rotary cutting mechanism;

FIG. 4 is an exploded view of the interior of the sleeve;

fig. 5 is a schematic view of the state of the reinforcing bars inside the threaded sleeve.

In the figure, 1, a hand-held casing; 2. installing a through opening; 3. a handle; 4. a gear chamber; 5. a load ring; 6. a support bearing; 7. a transmission gear ring; 8. a sliding sleeve; 9. a push block; 10. a, a cutter head; 11. b, a cutter head; 12. an extension rod; 13. a support; 14. a rack; 15. a bracket; 16. a synchronizing gear; 17. a pressure spring; 18. a drive motor; 19. a control switch; 20. a driving gear; 21. a support portion; 22. a flat cutting part; 23. a slot; 24. positioning holes; 25. a locking bolt; 26. chamfering and cutting off blocks; 27. grinding; 28. reinforcing steel bars; 29. a threaded sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the reinforcing bar cutting apparatus for construction engineering includes a hand-held casing 1; the front part of the handheld machine shell 1 is provided with an installation through hole 2 along the left-right direction, and the rear part of the handheld machine shell 1 is fixed with a handle 3; the right side of the middle part of the handheld machine shell 1 is provided with a gear bin 4; the front end of the gear bin 4 is communicated with the rear end of the mounting through hole 2; the inside of the mounting port 2 is provided with a rotary cutting mechanism.

As shown in fig. 2-4, the rotary cutting mechanism includes a bearing ring 5 disposed inside the installation port 2, and a support bearing 6 sleeved and fixed on the left side inside the installation port 2; the left part of the bearing ring 5 is fixedly sleeved on the inner side of the supporting bearing 6, and the outer side of the right part of the bearing ring 5 is fixedly sleeved with a transmission toothed ring 7; sliding sleeves 8 are respectively fixed at the front end and the rear end of the inner wall of the bearing ring 5; the sliding sleeve 8 is arranged along the radial direction of the bearing ring 5; the insides of the sliding sleeves 8 are respectively connected with pushing blocks 9 in a sliding way; a convex arc-shaped cutter head A10 is fixed at the rear end of the push block 9 at the front side; a concave arc-shaped cutter head B11 is fixed at the front end of the push block 9 at the rear side; the cutter head A10 and the cutter head B11 are correspondingly matched; the bearing ring 5 is provided with a centering control mechanism for enabling the cutter head A10 and the cutter head B11 to synchronously move in opposite directions; a transmission mechanism for driving the bearing ring 5 to rotate is arranged in the gear bin 4.

The centering control mechanism comprises an extension rod 12 which is arranged below the push block 9 on the front side in parallel; the front end of the extension rod 12 is fixed with the lower end of the push block 9 at the front side through a support 13; racks 14 are fixed at the lower end of the push block 9 and the rear part of the upper end of the extension rod 12 at the rear side; the two racks 14 correspond; a bracket 15 is fixed on the inner wall of the bearing ring 5; a synchronous gear 16 is rotatably connected to the bracket 15; a synchronizing gear 16 is located between the two racks 14; the two racks 14 are meshed with a synchronous gear 16; a pressure spring 17 is arranged in the sliding sleeve 8 at the rear side; the push block 9 at the rear side is connected with the inner wall of the bearing ring 5 through a pressure spring 17.

The transmission mechanism comprises a driving motor 18 fixed at the left end of the handheld machine shell 1; a control switch 19 of a driving motor 18 is arranged on the hand-held machine shell 1; the output end of the driving motor 18 penetrates into the gear bin 4 rightwards and is fixedly sleeved with a driving gear 20; the driving gear 20 is in meshed connection with the transmission gear ring 7.

The cutter head A10 and the cutter head B11 are both composed of a supporting part 21 and a flat cutting part 22; the inner end of the push block 9 is provided with a slot 23; the supporting part 21 is correspondingly inserted into the slot 23; the supporting part 21 is provided with a positioning hole 24; a locking bolt 25 is inserted on the push block 9; the locking bolt 25 is correspondingly in threaded connection with the positioning hole 24; the left side and the right side of the middle part of the front end of the flat cutting part 22 on the cutter head A10 are respectively connected with a semi-conical chamfer cutting block 26; the upper and lower ends of the hand-held casing 1 are fixed with grinding discs 27.

Firstly, the push block 9 at the rear side is pushed backwards, the push block 9 at the front side synchronously moves forwards under the meshing action of the upper rack 14 and the lower rack 14 with the synchronous gear 16, the cutter head A10 and the cutter head B11 can be relatively far away from each other for a certain distance, a space is left between the cutter head A10 and the cutter head B11, and the reinforcing steel bars 28 can penetrate between the cutter head A10 and the cutter head B11; then, the pushing action on the rear side pushing block 9 is released, the cutter bit A10 and the cutter bit B11 can synchronously approach to each other through the resilience of the pressure spring 17, and the reinforcing steel bar 28 is clamped at the central position of the bearing ring 5; then, the driving motor 18 is operated through the control switch 19 (the driving motor 18 can be powered by an external power supply), the driving gear 20 can drive the transmission gear ring 7 to rotate, the whole bearing ring 5 can rotate in the supporting bearing 6, and the cutter head A10 and the cutter head B11 are rotationally cut around the reinforcing steel bars 28; with the rotary cutting, and the action of the compression spring 17, the cutter head A10 and the cutter head B11 will gradually cut into the steel bar 28 until the cutter head A10 and the cutter head B11 contact with each other, and then the steel bar 28 can be cut off.

In the technical scheme, the cutter head A10 and the cutter head B11 are respectively arranged into a convex arc-shaped structure form and a concave arc-shaped structure form, firstly, the steel bar 28 is clamped conveniently in the initial process, in addition, in the rotary cutting process, the cutter head A10 and the cutter head B11 are not separated from the steel bar 28 easily due to the structure form, an operator can hold the cutter head A by hand to operate more easily, and the cutter head A10 and the cutter head B11 are correspondingly contacted conveniently, so that the steel bar 28 is completely cut off.

Through the effect to heart control mechanism, in the cutting process, can make A tool bit 10 and B tool bit 11 keep synchronous move in opposite directions to make the reinforcing bar 28 can comparatively stable keep at the central point of carrier ring 5 puts, the problem that cutting device took place to rock by a wide margin when avoiding the cutting, stationarity when effectively guaranteeing the cutting, thereby the cutting off tracking of avoiding traditional cutting device to take place easily with cut askew problem. In addition, the reinforcing steel bars 28 are cut from an angle only in the traditional cutting mode, the stress of the reinforcing steel bars 28 is unbalanced, and therefore the reinforcing steel bars are easy to deform, and the reinforcing steel bars 28 are cut in a circumferential rotary mode according to the technical scheme, so that the stress of the cutting positions of the reinforcing steel bars 28 is more balanced, the problem that the deformation of the cut end portions of the reinforcing steel bars 28 is serious is solved, and the roundness of the cut end portions is guaranteed. Obviously, through the operation of this technical scheme, can simplify subsequent 28 tip rounding processes of reinforcing bar and 28 terminal surfaces of reinforcing bar and grind the flat process, improve work efficiency.

As shown in fig. 4, the left and right sides in the middle of the front end of the flat cutting part 22 on the a tool bit 10 are respectively connected with a semicircular conical chamfer cutting block 26, the advantage of the structure lies in that a certain chamfer exists at the edge of the end part after the steel bar 28 is cut (the corresponding a tool bit 10 and the corresponding B tool bit 11 can be replaced according to the diameter of the steel bar 28, and the chamfer is ensured to be proper), as shown in fig. 5, the problem of edge burrs can be effectively removed, and the installation process of the mantle fiber processing process and the threaded sleeve 29 is more convenient.

Claims

1. The utility model provides a reinforcing bar cutting device that building engineering used which characterized in that: comprises a hand-held casing; the front part of the handheld machine shell is provided with an installation through hole along the left-right direction, and the rear part of the handheld machine shell is fixed with a handle; the right side of the middle part of the handheld machine shell is provided with a gear bin; the front end of the gear bin is communicated with the rear end of the mounting through hole; a rotary cutting mechanism is arranged inside the mounting through opening;

2. The reinforcing bar cutting apparatus for construction engineering according to claim 1, wherein: the cutter head A and the cutter head B both comprise a supporting part and a cutting part; the inner end of the push block is provided with a slot; the supporting part is correspondingly inserted into the slot; the supporting part is provided with a positioning hole; the push block is inserted with a locking bolt; the locking bolt is in threaded connection with the positioning hole correspondingly.

3. The reinforcing bar cutting apparatus for construction engineering according to claim 2, wherein: the left side and the right side of the middle part of the front end of the flat cutting part on the cutter head A are respectively connected with a semi-conical chamfer cutting block.

4. A reinforcing bar cutting apparatus for construction work according to claim 3, wherein: the upper end and the lower end of the handheld casing are both fixed with grinding plates.