A simple metal pipe hole cutting device

Abstract

The present invention provides a simple metal pipe hole cutting device, including a positioning device for positioning and installing a workpiece and a cutting device for processing a hole, the positioning device includes a positioning frame in the shape of a Chinese character "J", a left clamping plate and a right clamping plate respectively hingedly installed at the lower ends of both sides of the positioning frame, and a left slide plate and a right slide plate respectively hingedly connected to the left clamping plate and the right clamping plate at the lower ends, the upper ends of the left slide plate and the right slide plate are both slidably installed on the positioning frame, the positioning frame is provided with a driving device for driving the upper ends of the left slide plate and the right slide plate to synchronously slide toward or away from each other to drive the left clamping plate and the right clamping plate to rotate and clamp the workpiece, the positioning frame is provided with a mounting rod parallel to the axial direction of the workpiece, and the cutting device is installed at the other end of the mounting rod. The present invention positions and clamps the workpiece by the clamping arc surface of the left clamping plate and the right clamping plate in cooperation with the clamping wheel, and ensures the centering installation of the workpiece while clamping the workpiece, and has a simple structure and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of cutting equipment, and in particular to a simple metal pipe hole cutting device. Background Art

[0002] The development of cutting machines must adapt to the requirements of the development of modern mechanical processing industry. Cutting machines are divided into flame cutting machines, plasma cutting machines, laser cutting machines, water cutting machines, etc. Plasma cutting machines can cut various metals that are difficult to cut with oxygen cutting with different working gases, especially for non-ferrous metals. Plasma cutting has fast speed, smooth cutting surface, small thermal deformation, and almost no heat-affected zone, so plasma cutting machines are widely used. However, the existing cutting machines have complex structures, high costs, and large floor space. They are generally suitable for large-scale machine parts processing plants. For some occasions where a small number of holes are processed, it is not economically valuable to purchase large equipment, and the purchase cost is high. Summary of the invention

[0003] The purpose of the present invention is to provide a simple metal pipe hole cutting device with simple structure and small size in view of the above shortcomings.

[0004] The solution adopted by the present invention to solve the technical problem is: a simple metal pipe hole cutting device, including a positioning device for positioning and installing a workpiece and a cutting device for processing holes, the positioning device including a positioning frame in a "J" shape, a left clamping plate and a right clamping plate respectively hingedly installed at the lower ends of both sides of the positioning frame, and a left slide plate and a right slide plate respectively hingedly connected to the left clamping plate and the right clamping plate at the lower ends, the upper ends of the left slide plate and the right slide plate are both slidably installed on the positioning frame, the positioning frame is provided with a driving device for driving the upper ends of the left slide plate and the right slide plate to synchronously slide toward or away from each other to drive the left clamping plate and the right clamping plate to rotate and clamp the workpiece, the positioning frame is provided with a mounting rod parallel to the axial direction of the workpiece, and the cutting device is installed at the other end of the mounting rod.

[0005] Furthermore, in order to drive the left slide and the right slide to move synchronously toward each other, drive the left clamping plate to rotate counterclockwise, and the right clamping plate to rotate clockwise to clamp the workpiece, or drive the left slide and the right slide to move synchronously in opposite directions, drive the left clamping plate to rotate clockwise, and the right clamping plate to rotate counterclockwise to loosen the workpiece; the driving device includes a driving screw threadedly connected to the positioning frame and a first handwheel arranged at the end of the driving screw for rotating the driving screw, the driving screw is provided with a left thread located on the left and a right thread located on the right, the spiral directions of the left thread and the right thread are opposite, the upper end of the left slide is threadedly connected to the left thread, and the upper end of the right slide is threadedly connected to the right thread.

[0006] Furthermore, in order to realize the rotation of the driving screw and drive the left and right slide plates to move toward or away from each other synchronously; the lower surface of the positioning frame is provided with a slide groove extending along the axial direction of the driving screw, and the upper end of the left slide plate is rotatably installed with a left slider slidably installed in the slide groove, and the upper end of the right slide plate is rotatably installed with a right slider slidably installed in the slide groove, the left slider is threadedly connected to the left thread, and the right slider is threadedly connected to the right thread.

[0007] Furthermore, in order to firmly clamp the workpiece, prevent the workpiece from deflecting, and ensure processing accuracy; the lower ends of the left clamping plate and the right clamping plate are provided with clamping arc surfaces for rolling contact with the workpiece, and the lower side of the positioning frame is provided with a mounting shaft parallel to the axial direction of the workpiece, and both ends of the positioning shaft are coaxially rotatably installed with clamping wheels for cooperating with the clamping arc surfaces of the left clamping plate and the right clamping plate to clamp the workpiece.

[0008] Furthermore, in order to lock the self-rotation or radial movement of the workpiece and ensure the processing accuracy, the positioning device also includes a positioning needle vertically inserted into the middle of the positioning frame, the positioning needle is spirally installed on the positioning frame, the lower end of the positioning needle is provided with a pointed head for piercing the workpiece to lock the rotation of the workpiece, and the upper end of the positioning needle is provided with a second hand wheel for rotating the positioning needle.

[0009] Furthermore, in order to mark the processing position on the workpiece, after the hole on the upper side of the workpiece is processed, the workpiece can be installed according to the mark when the hole on the lower side of the workpiece is to be processed to ensure the processing accuracy; a line ruler is also provided in the middle of the positioning frame for scratching the workpiece to mark the cutting position, and the line ruler can be installed on the positioning frame so as to move up and down and swing left and right so as to draw marks along the curved surface of the workpiece.

[0010] Furthermore, in order to ensure that the alignment scale can move up and down and swing left and right so that the alignment scale can be moved along the curved surface of the workpiece to draw a mark on the workpiece; a mounting screw for installing the alignment scale is provided in the middle of the positioning frame, and an adjustment groove extending up and down is provided at the upper end of the alignment scale, and the mounting screw is movably inserted into the adjustment groove.

[0011] Furthermore, in order to achieve the adjustable installation height of the cutting device; the mounting rod can be installed on the positioning frame so as to be adjustable up and down, and a lifting screw is threadedly installed on the positioning frame, and the mounting rod is movably sleeved on the lifting screw, and the lifting screw is provided with locking nuts located on the upper side and the lower side of the mounting rod for fixing the mounting rod on the lifting screw.

[0012] Furthermore, in order to realize that the cutting device can rotate so as to make a rotational motion to cut a hole on the workpiece; the cutting device is a plasma cutter, and a rotating shaft is rotatably installed at one end of the mounting rod facing away from the positioning frame, and a converter is provided on the rotating shaft, and a chain is provided on the converter, and the plasma cutter is installed on the chain so that the handheld plasma cutter can rotate around the rotating shaft with the chain as a radius to cut a hole on the workpiece.

[0013] Furthermore, in order to adapt to the processing of holes of different specifications and sizes and improve the flexibility of the cutter, the adapter is provided with a chain hole for movably passing the chain, and a locking screw for locking the chain in the chain hole to fix the chain length is spirally installed on the adapter.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The present invention positions and clamps the workpiece by means of the clamping arc surfaces of the left clamping plate and the right clamping plate cooperating with the clamping wheel, and the left clamping plate and the right clamping plate are driven to rotate by sliding the left slide plate and the right slide plate, and two sets of threads in opposite directions are arranged on the driving screw rod, which are respectively connected with the left slide plate and the right slide plate by threads, and when the driving screw rod is rotated, the left slide plate and the right slide plate are driven to move synchronously toward or away from each other along the slide groove, thereby clamping the workpiece and ensuring the centering installation of the workpiece, the present invention has a simple structure and is easy to operate, and the arrangement of the positioning pin further ensures that the workpiece will not shake during processing, thereby ensuring the processing accuracy;

[0016] (2) The present invention also provides an alignment scale so that the processing position can be marked when processing the upper tube hole. When the workpiece is turned 180 degrees and the lower tube hole is processed, the lower tube hole can be aligned with the marked position as the standard to ensure that the upper tube hole and the lower tube hole are located on the same vertical line, which is convenient for installation;

[0017] (3) The present invention uses a chain to adjustably mount the plasma cutter on the adapter to achieve adjustable rotation radius of the plasma cutter, so as to process pipe holes of different diameters, expand the use range of the device, and improve the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings in conjunction with embodiments:

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0020] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0021] Figure 3 The structure of the present invention is schematically shown Figure 3 .

[0022] In the figure: 1-first hand wheel; 2-left slide; 3-left clamping plate; 4-clamping arc surface; 5-right clamping plate; 6-workpiece; 7-right slide; 8-positioning frame; 9-right slider; 10-clamping wheel; 11-alignment scale; 12-mounting screw; 13-second hand wheel; 14-positioning needle; 15-driving screw; 16-left slider; 17-mounting rod; 18-rotating shaft; 19-adapter; 20-chain; 21-plasma cutter; 22-locking screw. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Example: Figure 1-3 As shown, a simple metal pipe hole cutting device includes a positioning device for positioning and installing a workpiece 6 and a cutting device for processing holes, the positioning device includes a positioning frame 8 in the shape of a "J", a left clamping plate 3 and a right clamping plate 5 respectively hingedly installed on the lower ends of both sides of the positioning frame 8, and a left slide plate 2 and a right slide plate 7 respectively hingedly connected to the left clamping plate 3 and the right clamping plate 5 at the lower ends, the upper ends of the left slide plate 2 and the right slide plate 7 are both slidably installed on the positioning frame 8, the positioning frame 8 is provided with a driving device for driving the upper ends of the left slide plate 2 and the upper ends of the right slide plate 7 to synchronously slide toward or away from each other to drive the left clamping plate 3 and the right clamping plate 5 to rotate and clamp the workpiece 6, the positioning frame 8 is provided with a mounting rod 17 parallel to the workpiece axis, and the cutting device is installed on the other end of the mounting rod 17.

[0025] In this embodiment, in order to drive the left skateboard 2 and the right skateboard 7 to move toward each other synchronously, the left clamping plate 3 is driven to rotate counterclockwise, and the right clamping plate 5 is driven clockwise to clamp the workpiece 6, or the left skateboard 2 and the right skateboard 7 are driven to move backwards synchronously, the left clamping plate 3 is driven to rotate clockwise, and the right clamping plate 5 is driven counterclockwise to loosen the workpiece 6; the driving device includes a driving screw 15 threadedly connected to the positioning frame 8 and a first handwheel 1 arranged at the end of the driving screw 15 for rotating the driving screw 15, the driving screw 15 is provided with a left thread located on the left side and a right thread located on the right side, the spiral directions of the left thread and the right thread are opposite, the upper end of the left skateboard 2 is threadedly connected to the left thread, and the upper end of the right skateboard 7 is threadedly connected to the right thread.

[0026] In this embodiment, in order to realize the rotation of the driving screw 15, the left skateboard 2 and the right skateboard 7 are driven to move toward or away from each other synchronously; the lower surface of the positioning frame 8 is provided with a slide groove extending along the axial direction of the driving screw 15, and the upper end of the left skateboard 2 is rotatably installed with a left slider 16 slidably installed in the slide groove, and the upper end of the right skateboard 7 is rotatably installed with a right slider 9 slidably installed in the slide groove, the left slider 16 is threadedly connected to the left thread, and the right slider 9 is threadedly connected to the right thread.

[0027] In this embodiment, in order to firmly clamp the workpiece 6, prevent the workpiece 6 from deflecting, and ensure the processing accuracy; the lower ends of the left clamping plate 3 and the right clamping plate 5 are provided with a clamping arc surface 4 for rolling contact with the workpiece 6, and the lower side of the positioning frame 8 is provided with a mounting shaft parallel to the axial direction of the workpiece 6, and the two ends of the positioning shaft are coaxially rotatably installed with clamping wheels 10 for cooperating with the clamping arc surfaces 4 of the left clamping plate 3 and the right clamping plate 5 to clamp the workpiece 6.

[0028] In this embodiment, in order to lock the self-rotation or radial movement of the workpiece 6 and ensure the processing accuracy, the positioning device also includes a positioning needle 14 vertically penetrated through the middle of the positioning frame 8, and the positioning needle 14 is spirally installed on the positioning frame 8. The lower end of the positioning needle 14 is provided with a pointed head for piercing the workpiece 6 to lock the rotation of the workpiece 6, and the upper end of the positioning needle 14 is provided with a second hand wheel 13 for rotating the positioning needle 14.

[0029] In this embodiment, in order to mark the processing position on the workpiece 6, after the hole on the upper side of the workpiece 6 is processed, the workpiece 6 can be installed according to the mark when the hole on the lower side of the workpiece 6 is to be processed to ensure the processing accuracy; the middle of the positioning frame 8 is also provided with an alignment scale 11 for scratching the workpiece 6 to mark the cutting position, and the alignment scale 11 can be installed on the positioning frame 8 to move up and down and swing left and right so as to draw marks along the curved surface of the workpiece 6.

[0030] In this embodiment, in order to ensure that the alignment scale 11 can move up and down and swing left and right so as to move the alignment scale 11 along the curved surface of the workpiece 6 to draw a mark on the workpiece 6; a mounting screw 12 for mounting the alignment scale 11 is provided in the middle of the positioning frame 8, and an adjustment groove extending up and down is provided at the upper end of the alignment scale 11, and the mounting screw 12 is movably inserted into the adjustment groove.

[0031] In this embodiment, in order to achieve the adjustable installation height of the cutting device; the mounting rod 17 is installed on the positioning frame 8 so as to be adjustable up and down, and a lifting screw is threadedly installed on the positioning frame 8, and the mounting rod 17 is movably sleeved on the lifting screw, and the lifting screw is provided with locking nuts located on the upper side and the lower side of the mounting rod 17 for fixing the mounting rod 17 on the lifting screw.

[0032] In this embodiment, in order to realize that the cutting device can rotate so as to make a rotational motion to cut a hole on the workpiece 6; the cutting device is a plasma cutter 21, and the mounting rod 17 is rotatably mounted with a rotating shaft 18 at one end facing away from the positioning frame 8, and an adapter 19 is provided on the rotating shaft 18, and a chain 20 is provided on the adapter 19. The plasma cutter 21 is installed on the chain 20 so that the handheld plasma cutter 21 rotates around the rotating shaft 18 with the chain 20 as a radius to cut a hole on the workpiece 6.

[0033] In this embodiment, in order to adapt to the processing of holes of different specifications and sizes and improve the flexibility of the cutter, the adapter 19 is provided with a chain hole for movably passing the chain 20, and a locking screw for locking the chain 20 in the chain hole to fix the length of the chain 20 is spirally installed on the adapter 19.

[0034] Specific implementation process: During processing, the positioning frame 8 is suspended and installed on the workbench, the workpiece 6 is placed between the left clamping plate 3 and the right clamping plate 5, the first hand wheel 1 is rotated, the screw 15 is driven to rotate, and the left slider 16 and the right slider 9 are driven to move closer to the middle, thereby driving the left clamping plate 3 to rotate clockwise and the right clamping plate 5 to rotate counterclockwise to clamp the workpiece 6, the clamping wheel 10 is against the top of the workpiece 6, and the workpiece 6 is clamped by three-point positioning, and then, the second hand wheel 13 is rotated to move the positioning pin 14 downward to lock the rotation of the workpiece 6. After the workpiece 6 is positioned and installed, according to the hole to be processed The length of the aperture adjustment chain 20, that is, the rotation radius of the plasma cutter 21, is adjusted, and the plasma cutter 21 is manually rotated to drive the plasma cutter 21 to rotate about the rotation center of the rotating shaft 18 to cut the upper tube hole. To process the lower tube hole, slide the alignment ruler 11 to leave a scratch on the workpiece 6, and then reverse the drive screw 15 to drive the left clamping plate 3 to rotate counterclockwise and the right clamping plate 5 to rotate clockwise to loosen the workpiece 6. After rotating the workpiece 6 180°, touch the scratch position with your hand and adjust it to the bottom, then repeat the clamping action to start processing.

[0035] The above descriptions are merely embodiments of the present invention, and are not intended to limit the scope of patent protection of the invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present invention.

Claims

1. A simple metal pipe hole cutting device, characterized in that: The tool holder is provided with a right and left sliding plate, and the left and right sliding plates are respectively hingedly mounted on the lower ends of the two sides of the tool holder, and the upper ends of the left and right sliding plates are respectively hingedly connected to the left and right sliding plates. The upper ends of the left and right sliding plates are slidably mounted on the tool holder, and the positioning frame is provided with a driving device for driving the upper ends of the left and right sliding plates to synchronously slide toward or away from each other to drive the left and right clamping plates to rotate and clamp the workpiece. The positioning frame is provided with a mounting rod parallel to the axial direction of the workpiece, and the cutting device is mounted on the other end of the mounting rod. The positioning device also includes a positioning needle vertically penetrated through the middle of the positioning frame, and the positioning needle is spirally mounted on the positioning frame, and the lower end of the positioning needle is provided with a pointed head for piercing the workpiece to lock the rotation of the workpiece, and the upper end of the positioning needle is provided with a second hand wheel for rotating the positioning needle. The driving device comprises a driving screw threadedly connected to the positioning frame and a first hand wheel arranged at the end of the driving screw for rotating the driving screw, the driving screw is provided with a left thread located on the left side and a right thread located on the right side, the spiral direction of the left thread and the right thread being opposite, the upper end of the left slide plate is threadedly connected to the left thread, and the upper end of the right slide plate is threadedly connected to the right thread, the lower surface of the positioning frame is provided with a slide groove extending along the axial direction of the driving screw, the upper end of the left slide plate is rotatably mounted with a left slider slidably mounted in the slide groove, and the upper end of the right slide plate is rotatably mounted with a right slider slidably mounted in the slide groove, the left slider is threadedly connected with the left thread, and the right slider is threadedly connected with the right thread, the lower ends of the left clamping plate and the right clamping plate are both provided with a clamping arc surface for rolling contact with the workpiece, the lower side of the positioning frame is provided with a mounting shaft parallel to the axial direction of the workpiece, and the two ends of the mounting shaft are coaxially rotatably mounted with clamping wheels for cooperating with the clamping arc surfaces of the left clamping plate and the right clamping plate to clamp the workpiece; The mounting rod can be mounted on the positioning frame in an adjustable manner up and down, a lifting screw is threadedly mounted on the positioning frame, the mounting rod is movably sleeved on the lifting screw, the lifting screw is provided with locking nuts located on the upper side and the lower side of the mounting rod for fixing the mounting rod on the lifting screw, the cutting device is a plasma cutter, a rotating shaft is rotatably mounted on one end of the mounting rod facing away from the positioning frame, an adapter is provided on the rotating shaft, a chain is provided on the adapter, the plasma cutter is mounted on the chain so that the handheld plasma cutter can be rotated around the rotating shaft with the chain as a radius to cut a hole on the workpiece.

2. The simplified metal pipe hole cutting device according to claim 1 is characterized in that: A line ruler for scratching the workpiece to mark the cutting position is also provided in the middle of the positioning frame. The line ruler can be installed on the positioning frame to move up and down and swing left and right so as to draw a mark along the curved surface of the workpiece.

3. The simplified metal pipe hole cutting device according to claim 2 is characterized in that: A mounting screw for mounting the alignment scale is arranged in the middle of the positioning frame, an adjustment slot extending up and down is arranged on the upper end of the alignment scale, and the mounting screw is movably inserted into the adjustment slot.

4. The simplified metal pipe hole cutting device according to claim 1, characterized in that: The adapter is provided with a chain hole for movably passing the chain, and a locking screw for locking the chain in the chain hole to fix the length of the chain is spirally installed on the adapter.

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