Core rod drilling tool

Abstract

The utility model belongs to the technical field of drilling tools, and particularly relates to a core rod drilling tool which comprises a core rod body and a tool assembly used for cutting the end of the core rod body, and the tool assembly comprises a tool apron and two installation seats symmetrically installed at one end of the tool apron. A positioning area for positioning the end part of the core rod body is formed between the two mounting seats, a drill bit for drilling the end part of the core rod body is arranged in the positioning area, and one end of the drill bit is detachably mounted on the tool apron; according to the core rod, the two installation bases matched with the drill bit are additionally arranged, so that drilling treatment can be conducted on the end portions of the core rod bodies, the original external connection between the core rod bodies is changed into internal connection, pasting of metal sheets is reduced, the machining efficiency is improved, and the machining cost is reduced. Procedures are simplified, and cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling tools, in particular to a core rod drilling tool. Background Art

[0002] In order to reduce operation time and production consumption during extrusion production, multiple processing mandrels are connected in series before extrusion operation.

[0003] At present, when the core rod is connected, the tail of the front core rod is first inserted into the cutting tool (such as Figure 1 As shown, after cutting the outer edge of the mandrel of a certain length, cut a small part of the outer diameter and apply glue, then insert the mandrel into the connecting tube, wait for the glue to dry, then cut the head of the rear mandrel and apply glue, then insert it into the connecting tube, wait for it to dry, and paste metal sheets on the connecting tube for the convenience of identifying the connection points in the subsequent processing, and then carry out the subsequent process. Since the connection requires multiple turning and insertion, the connection process is complicated, and the glue dries quickly, the connecting tube cannot completely wrap the cut mandrel, and the connection surface is uneven. During production, the uneven connection will shake after passing through the guide wheel head, which is easy to cause corrugated marks, resulting in abnormal size or appearance quality during hose production. Utility Model Content

[0004] The utility model aims to provide a core rod drilling tool to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a core rod drilling tool, comprising: a core rod body and a tool assembly for cutting the end of the core rod body, the tool assembly comprising a tool seat and two mounting seats symmetrically installed at one end of the tool seat, a positioning area for positioning the end of the core rod body is formed between the two mounting seats, a drill bit for drilling holes in the end of the core rod body is provided in the positioning area, and one end of the drill bit can be removably mounted on the tool seat.

[0006] Preferably, two tool bodies for performing end surface cutting on the end of the mandrel body are further provided in the positioning area, and one end of the two tool bodies are detachably mounted on the side walls of the two mounting seats respectively.

[0007] Preferably, a through hole and a threaded hole are sequentially provided between the tool body and the mounting seat, and fixing bolts connecting the tool body and the mounting seat are provided in the through hole and the threaded hole.

[0008] Preferably, the tool holder includes a mounting plate and a rotating shaft mounted on the rotating axis at one end of the mounting plate, the two mounting seats are symmetrically mounted on the side of the mounting plate away from the rotating axis, and a plug hole for accommodating a drill bit is opened at the rotating axis at one end of the mounting plate.

[0009] Preferably, an indentation hole communicating with the insertion hole is formed on the outer wall of the mounting disc, and a fastening bolt abutting against the drill bit is arranged in the indentation hole.

[0010] Preferably, one end of the mandrel body is drilled to form a connection hole for accommodating the drill bit, and a docking rod for connection is arranged between two adjacent connection holes.

[0011] Preferably, a positioning hole coaxial with the drill bit is formed between the two mounting seats, and the positioning area is formed in the positioning hole.

[0012] Preferably, a chip removal groove for chip removal is formed between two adjacent sides of the two mounting seats.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) By adding two mounting seats matched with the drill bit, the utility model can drill the end part of the mandrel body, thereby changing the external connection between the original mandrel bodies into internal connection, reducing the pasting of metal sheets, simplifying the process and saving costs.

[0015] (2) By adding a tool body on the side surfaces of the two mounting seats, the utility model enables the equipment to perform end face cutting on the mandrel body while drilling, facilitating the subsequent docking of the mandrel body, ensuring a stable connection and solving the jitter phenomenon in the production process of the rubber tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the existing mandrel docking structure;

[0017] Figure 2 is a schematic diagram of the structure of the mandrel body of the utility model;

[0018] Figure 3 is a front view of the tool holder, mounting seat, drill bit and tool body of the utility model;

[0019] Figure 4 is a side view of the tool holder, mounting seat, drill bit and tool body of the utility model;

[0020] Figure 5 is a sectional view of the tool holder, mounting seat, drill bit, mandrel body and tool body of the utility model;

[0021] Figure 6 is a front view of the tool body of the utility model;

[0022] In the figure: 1. core rod body; 2. connecting hole; 3. docking rod; 4. drill bit; 5. chip groove; 6. fixing bolt; 7. tightening bolt; 8. recessed hole; 9. rotating shaft; 10. mounting plate; 11. mounting seat; 12. tool body; 13. positioning hole; 14. plug-in hole; 15. threaded hole; 16. through hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] refer to Figures 3 - 5 As shown, the core rod drilling tool provided by the utility model comprises: a core rod body 1 and a tool assembly for cutting the end of the core rod body 1, the tool assembly comprises a tool holder and two mounting seats 11 symmetrically mounted on one end of the tool holder, a positioning area for positioning the end of the core rod body 1 is formed between the two mounting seats 11, a drill bit 4 for drilling the end of the core rod body 1 is provided in the positioning area, and one end of the drill bit 4 can be detachably mounted on the tool holder 11.

[0025] Combination Figure 3 As shown, a positioning hole 13 coaxial with the drill bit 4 is formed between the two mounting seats 11 , and a positioning area is formed in the positioning hole 13 .

[0026] Combination Figures 4 - 5 As shown, the tool holder includes a mounting plate 10 and a rotating shaft 9 mounted on the rotating axis at one end of the mounting plate 10, two mounting seats 11 are symmetrically mounted on the side of the mounting plate 10 away from the rotating axis 9, and a plug-in hole 14 for accommodating the drill bit 4 is opened at the rotating axis at one end of the mounting plate 10.

[0027] As mentioned above, when using the core rod body 1, tool assembly, two mounting seats 11 and drill bit 4 provided by the utility model, the two mounting seats 11 position the core rod body 1 outside the drill bit 4, so that the axis center of the end of the core rod body 1 is on the extension line of the axis center of the drill bit 4, and the positioning hole 13 can prevent the core rod body 1 from shaking between the two mounting seats 11. The mounting plate 10 provides an installation position for the two mounting seats 11 and the drill bit 4. The rotating shaft 9 facilitates the connection of the mounting plate 10 with an external rotating mechanism, thereby facilitating the mounting plate 10 to rotate, and then driving the drill bit 4 to drill the core rod body 1.

[0028] Further, in order to facilitate the replacement of the drill bit 4, refer to Figures 4 - 5As shown, an indentation hole 8 communicating with the insertion hole 14 is formed on the outer wall of the mounting disc 10, and a fastening bolt 7 abutting against the drill bit 4 is provided in the indentation hole 8. After removing the fastening bolt 7, the restriction on the drill bit 4 is released in the insertion hole 14, so as to facilitate taking out the drill bit 4 from the insertion hole 14 and replacing the drill bit 4.

[0029] Further, in order to facilitate connecting two adjacent mandrel bodies 1, referring to Figure 2 As shown, a connection hole 2 for accommodating the drill bit 4 is formed by drilling at one end of the mandrel body 1, and a docking rod 3 for connection is provided between two adjacent connection holes 2. After the end of the mandrel body 1 is drilled, the docking rods 3 are respectively inserted into the connection holes 2 on the two mandrel bodies 1, thereby completing the internal connection between two adjacent mandrel bodies 1.

[0030] In the present utility model, referring to Figures 3 - 5 As shown, two tool bodies 12 for end face cutting of the ends of the mandrel body 1 are further provided in the positioning area of this embodiment, and one ends of the two tool bodies 12 are respectively detachably mounted on the side walls of two mounting seats 11.

[0031] Referring to Figures 5 - 6 As shown, a through hole 16 and a threaded hole 15 are successively formed between the tool body 12 and the mounting seat 11, and a fixing bolt 6 for connecting the tool body 12 and the mounting seat 11 is provided in the through hole 16 and the threaded hole 15.

[0032] In the above, when using the two tool bodies 12 provided by the present utility model, one ends of the two tool bodies 12 are both fixedly mounted on the side walls of the corresponding mounting seats 11 through fixing bolts 6, and at the same time, the other ends of the two tool bodies 12 both extend into the positioning area. When the tool holder rotates, the drill bit 4 and the two tool bodies 12 are used to drill and end face cut the ends of the mandrel body 1 at the same time. After removing the fixing bolts 6, the tool bodies 12 can be replaced.

[0033] In summary, in order to facilitate discharging the drill bit 4 and the chips generated by end face cutting outwards, referring to Figures 3 - 5 As shown, a chip discharge groove 5 for discharging chips is formed between two adjacent sides of the two mounting seats 11. After the drill bit 4 and the tool body 12 drill and end face cut the mandrel body 1, the generated chips are discharged outwards through the chip discharge groove 5, avoiding the interference of the chips on drilling and end face cutting.

[0034] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. Mandrel drilling tool, characterized in that, include: A mandrel body (1) and a tool assembly for cutting the end of the mandrel body (1), the tool assembly comprising a tool holder and two mounting seats (11) symmetrically mounted at one end of the tool holder, a positioning area for positioning the end of the mandrel body (1) is formed between the two mounting seats (11), a drill bit (4) for drilling a hole in the end of the mandrel body (1) is provided in the positioning area, and one end of the drill bit (4) can be detachably mounted on the tool holder (11).

2. The mandrel drilling tool according to claim 1, wherein: Two tool bodies (12) for performing end surface cutting on the end of the mandrel body (1) are also provided in the positioning area, and one end of the two tool bodies (12) is detachably mounted on the side walls of the two mounting seats (11).

3. The mandrel drilling tool according to claim 2, wherein: A through hole (16) and a threaded hole (15) are sequentially provided between the tool body (12) and the mounting seat (11), and fixing bolts (6) for connecting the tool body (12) and the mounting seat (11) are provided in the through hole (16) and the threaded hole (15).

4. The mandrel drilling tool according to claim 1, wherein: The tool holder comprises a mounting plate (10) and a rotating shaft (9) mounted on the rotating shaft center at one end of the mounting plate (10); two mounting seats (11) are symmetrically mounted on a side of the mounting plate (10) away from the rotating shaft (9); and a plug-in hole (14) for accommodating a drill bit (4) is provided at the rotating shaft center at one end of the mounting plate (10).

5. The mandrel drilling tool according to claim 4, characterized in that: An inner recessed hole (8) communicating with the plug hole (14) is provided on the outer wall of the mounting plate (10), and a fastening bolt (7) abutting against the drill bit (4) is provided in the inner recessed hole (8).

6. The mandrel drilling tool according to claim 1, characterized in that: A connection hole (2) for accommodating a drill bit (4) is drilled at one end of the core rod body (1), and a butt joint rod (3) for connection is provided between two adjacent connection holes (2).

7. The mandrel drilling tool according to claim 1, characterized in that: A positioning hole (13) coaxial with the drill bit (4) is formed between the two mounting seats (11), and the positioning area is formed in the positioning hole (13).

8. The mandrel drilling tool according to claim 1, wherein: A chip removal groove (5) for chip removal is formed between adjacent sides of the two mounting seats (11).

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