JP3112310U - Cutting machine - Google Patents

Abstract

An object of the present invention is to provide a holding mechanism for a material to be cut and a feeding mechanism for a cutting grindstone, which are adapted to suppress deformation of the cutting work holding and generation of burrs.
A pair of upper semicircular side plates are connected by a connecting rod, and a pair of lower semicircular side plates in which sandwiching pieces 425 are screwed to face both front and back surfaces of a joint portion are connected. The lower assembly part 42 connected by a rod is joined at the end of the joint part to hold the workpiece, and the holding assembly part 4 is restrained from moving in the axial direction and the holding assembly part 4 is held. A guide part 5 having a guide roller for rotatably holding the assembly part, a drive motor part 21 equipped with a cutting grindstone 212, a slide base part having a slide base 221, an upper guide rod 222 and a lower guide rod 223. A cutting tool portion 2 provided with an operating handle 31, an operating handle 31 installed on the slide base 221, a stator 33 fixed to the lower guide rod, and a link 32 connecting the operating handle and the stator. The operation unit 3 Machine tool.
[Selection] Figure 1

Description

  The present invention relates to a lightweight metal tube and a processing machine that can easily cut a metal rod.

  A processing machine that uses a cutting grindstone that rotates at high speed is widely used as a processing machine that cuts metal tubes and metal rods.

  As an improvement measure, an apparatus in which a chamfering function by a chamfering cutter is added to a cutting machine has been proposed (see Patent Document 1). However, in this proposal, since the material to be cut is a pipe used as a temporary construction material, a pipe vise is used to fix and support the pipe. This method is not suitable when the material to be cut is thin.

Further, a processing method that suppresses the generation of burrs has been proposed (see Patent Document 2). In the case of cutting a metal tube, a cutting grindstone having a radius larger than that of the material to be cut is used, and in the final step of cutting the fixed metal tube, the metal tube is rotated to suppress the generation of burrs. This method is effective by adopting a method of rotating a metal tube in order to suppress the generation of burrs, but at the time of cutting the fixed metal tube before reaching the final process, the generation of burrs is suppressed. It cannot be suppressed.
Utility model registration number 2525639 JP 2001-246546 A

  The problem to be solved is that when a thin metal tube is cut using a cutting grindstone, a holding means and a cutting means suitable for suppressing deformation of the material to be cut and generation of scratches and burrs are realized. The point is to develop the mechanism.

  The present invention joins the upper assembly part having the upper semicircular side plate and the lower assembly part having the lower semicircular side plate to hold the material to be cut, and the upper semicircular side plate and the lower semicircular side plate can be freely rotated by the guide part. The main feature is that the slide base of the cutting tool portion can be moved in the axial direction of the guide rod by manually operating the operation handle.

  The cutting machine according to the present invention has a simple configuration, so that it is easy to carry, but it can be easily operated without causing scratches on the material to be cut and suppressing the occurrence of deformation and burrs during cutting. There is. Since the operation handle can be operated manually, there is an advantage that burrs can be reduced even when cutting a deformed material.

  The upper assembly part with the upper semicircular side plate and the lower assembly part with the lower semicircular side plate are joined to secure the thin-walled tube, and the upper semicircular side plate and the lower semicircular side plate can be rotated by the guide part. By supporting, the material to be cut can be easily rotated at the time of cutting, and the slide base of the cutting tool portion can be moved in the axial direction of the guide rod by manually operating the operation handle.

  FIG. 1 is a right side view of a cutting machine according to the present invention. FIG. 2 is a plan view of the cutting machine of the present invention. The cutting machine according to the present invention includes a holding assembly part 4, a guide part 5, a cutting tool part 2, an operation part 3, and a base 1. The holding assembly unit 4 includes an upper assembly unit 41 and a lower assembly unit 42, and the workpiece 11 is held by the upper assembly unit 41 and the lower assembly unit 42. The upper assembly portion 41 and the lower assembly portion 42 have an upper semicircular side plate 411 and a lower semicircular side plate 421, and are rotatably held by the guide portion 5. FIG. 1 shows a state where the cutting grindstone 212 driven by the cutting tool portion 2 slightly bites in the direction of the central axis of the workpiece 11 and proceeds to the cutting process.

  3A, 3B, and 3C are a plan view, a right side view, and a plan view of a latch, respectively, of the upper assembly portion. The upper assembly portion 41 includes a pair of upper semicircular side plates 411, three connecting rods 414, a U-shaped packing 413, and four hooks 415. The upper semicircular side plate 411 includes a joint concave portion 412 formed at an end portion, and engages with a joint convex portion 422 formed at an end portion of the lower semicircular side plate 421 so that the upper assembly portion 41 and the lower assembly portion 42 are connected. When joined at the end of the joined portion and integrated as the holding assembly portion 4, it plays a role of positioning both in the circumferential direction. The four hooks 415 are mounted on the two connecting rods 414 of the upper assembly 41 and are connected to the lower assembly 42 in order to prevent the upper and lower assemblies from being separated when integrated as the holding assembly 4. It is hung on a stick.

  4A and 4B are a plan view and a right side view of the lower assembly part, respectively. The lower assembly portion 42 includes a pair of lower semicircular side plates 421, three connecting rods 424, a U-shaped packing 423, and four sandwiching pieces 425. Two each of the sandwiching pieces 425 are screwed to face both the front and back surfaces of the end portion of the joint portion of the lower semicircular side plate 421. These play a role of preventing axial displacement of the holding assembly 4 when integrated as the holding assembly 4. The lower semicircular side plate 421 includes a joint convex portion 422 formed at the end portion, and engages with a joint concave portion 412 formed at the end portion of the upper semicircular side plate 411 so as to be integrated as the holding assembly portion 4. It plays the role of positioning in the circumferential direction.

  The upper semicircular side plate 411 and the lower semicircular side plate 421 are each provided with a U-shaped packing 413 and a U-shaped packing 423 at portions that come into contact with the outer periphery of the material to be cut 11, and when the material to be cut 11 is held, Is assured, and at the same time, the surface of the workpiece 11 is protected. With such a configuration, even when the material 11 to be cut is a thin metal tube, there is an effect of preventing the occurrence of scratches on the surface without losing the circular shape of the cross section.

  The guide part 5 includes an upper guide metal part 51 and a set of lower guide metal parts 52. 5A is a plan view of the lower guide fitting 52, and FIG. 5B is a right side view thereof. Each set of lower guide fittings 52 includes two guide rollers 522 on a roller holder 521. The upper guide fitting 51 includes an arm 511 and a guide roller 512, and is supported by the column 53 so as to be rotatable. A spring 54 is interposed between the arm 511 and the support column 53. The guide roller 512 and the guide roller 522 have grooves 513 and 523, respectively, and rotatably hold the side plate of the holding assembly portion 4 holding the material 11 to be cut. The upper guide metal part 51 is intended to support the holding assembly part 4 so that it can be used more safely.

  The cutting tool part 2 includes a drive motor part 21 and a slide base part 22. The drive motor unit 21 includes a drive motor 211 and a protective cover 213, and a cutting grindstone 212 is attached to the drive motor 211. The drive motor unit 21 is held on the slide table 221 by a holding belt 214 on the motor mount 225 of the slide table unit 22.

  The slide table 22 includes a slide table 221 that slides on the upper guide rod 222 and the lower guide rod 223 supported by the support column 224, and a motor mount 225 mounted on the slide table 221. The upper guide rod 222 and the lower guide rod 223 are arranged on a plane perpendicular to the upper surface of the pedestal 1 and play a role of preventing the sliding base portion 22 from being inclined. Accordingly, there is an effect that the rotating surface of the cutting grindstone 212 does not tilt even while the slide base 221 is moving.

  The operation unit 3 includes a handle 31, a link 32, and a stator 33. The handle 31 can be rotated around a support shaft a34 installed on the slide base 221 and includes a support shaft b35. It is connected to the link 32. The stator 33 includes a support shaft c36 and is movable on the lower guide rod 223, but is fixed at a specific position. Further, the support shaft c <b> 36 is connected to the link 32. When the handle 31 is rotated in the axial direction of the vertical guide rod, the slide base 221 moves in the same direction. The movement of the cutting tool portion 2 in the axial direction of the workpiece 11 can be finely adjusted, and it is effective as a means for suppressing the occurrence of burrs.

The cutting process is described.
1. After temporarily fixing the stator 33 and moving the handle 31 back and forth in the axial direction of the workpiece 11, after confirming the movable range of the slide base 22, the stator 33 is fixed. The movable range varies depending on the shape and thickness of the material 11 to be cut.
2. The drive motor unit 21 to which the cutting grindstone 212 is attached is placed on the motor mount 225 and held by the holding belt 214. Needless to say, the plane of rotation of the cutting grindstone 212 is perpendicular to the base 1.
3. The material to be cut 11 is placed on the lower assembly part 42, the cutting location is confirmed, the upper assembly part 41 is installed, and the holding assembly part 4 is latched to integrate the holding assembly part 4. To do.
4). The circumference of the upper semicircular side plate 411 and the lower semicircular side plate 421 of the holding assembly part 4 is inserted into the groove 523 of the guide roller 522 of the guide part 5, and similarly, the arm 511 is tilted to the groove 513 of the guide roller 512. Include. The arm 511 is attracted to the column 53 by the spring 54. In this way, the holding assembly portion 4 that holds the workpiece 11 can be smoothly rotated about the axis of the workpiece 11.
5. The cutting grindstone 212 is rotated.
6). The handle 31 is moved to start cutting while the cutting grindstone 212 is in contact with the workpiece 11.
7). When the grindstone surface of the cutting grindstone 212 slightly cuts through the tube wall of the material 11 to be cut, the handle operation is stopped and the holding assembly section 4 is turned.
8). The rotation direction of the holding assembly portion 4 is opposite to the rotation direction of the cutting grindstone 212.
9. After cutting, chamfering is performed with a round file, a round grindstone, or a scraper.

The specification of each part in this embodiment is shown. The upper semicircular side plate 411 is made of SPHC and has a semicircular outer diameter of 200 mm, an inner diameter of 110 mm, and a thickness of 4.5 mm. The U-shaped packing 413 is made of silicon rubber and has a thickness of 5 mm. The connecting rod 414 has a length of 300 mm and a thickness of 10 mm, and both semicircular side plates are tightened with nuts. Although welding is possible, it may cause distortion.
The semicircular inner diameter 110 mm is a dimension in which the outer diameter of the material to be cut corresponds to 105 mm, and changes depending on the outer diameter of the material to be cut.

  The lengths of the handle 31 and the link 32 are 250 mm and 44 mm, respectively. The distance between the support shaft b35 and the support shaft c36 is 39 mm. The thickness of the guide rod b223 is 25 mm.

Indicates cutting conditions. The drive motor used was a commercially available one, and the cutting grindstone 212 was manufactured by Nippon Resibon Co., Ltd. (thickness 1 mm, outer diameter 105 mm, peripheral speed 80 m / s or less). The material 11 to be cut is a stainless steel tube having an outer diameter of 105 mm and a wall thickness of 0.8 mm. There were few burrs generated at the time of cutting, and a practical effect was obtained. When the material to be cut is a pipe material, the feed of the cutting grindstone 212 is constant, so the operation of the handle 31 is only at the beginning of cutting, but when the material to be cut is a deformed material, the cutting depth varies, In addition, the handle 31 must be operated. The dimensions described in this specification are approximate.
Example 2

  FIG. 6 shows a semicircular side plate for applying the present invention to the cutting of a metal punch as a second embodiment. The gist of the present invention is also effective for metal tubes and metal rods having irregular cross sections. As shown in the drawing, the upper semicircular side plate 61 and the lower semicircular side plate 62 have a circular outer periphery, but the portions in contact with the material to be cut are formed along the outlines 63 and 64 to be cut. The form in which the holding fixture holds the material to be cut is the same as when the material to be cut has a circular cross section. That is, the lower assembly portion includes a pair of lower semicircular side plates 62, three connecting rods (not shown), a U-shaped packing 622, and four sandwiching pieces 621. Two each of the sandwiching pieces 621 are screwed so as to face both the front and back surfaces of the end portion of the joint portion of the lower semicircular side plate 62. These play a role of preventing axial displacement of the holding assembly when integrated as a holding assembly. The lower semicircular side plate 62 includes a joint convex portion 623 formed at the end portion, engages with a joint concave portion 611 formed at the end portion of the upper semicircular side plate 61, and is integrated as a holding assembly portion. Plays the role of circumferential positioning. The U-shaped packing of the upper assembly part is installed as necessary.

  Since the slide of the cutting tool part can be moved in the axial direction of the guide rod by manually operating the operation handle, the cutting wheel is not round and the cutting wheel is cut along the contour line when cutting a deformed material. Since it can move, it is effective in suppressing the generation of burrs.

It is a right view of the cutting machine of this invention. It is a top view of the cutting machine of this invention. (A) Top view of an upper assembly part (b) Right side view (c) Top view of a latching tool. It is (a) top view (b) right view of a lower assembly part. It is (a) top view (b) right view of a lower guide metal fitting part. It is a top view of the semicircle side plate for using when a to-be-cut material is a deformed shape.

Explanation of symbols

1 Base 11 Material to be cut (pipe)
2 Cutting tool part 21 Drive motor part 211 Drive motor 212 Cutting grindstone 213 Protective cover 214 Gripping belt 22 Slide base part 221 Slide base 222 Upper guide rod 223 Lower guide rod 224 Post 225 Motor mount 3 Operation part 31 Handle 32 Link 33 Stator 34 Support shaft a
35 Spindle b
36 Support shaft c
4 Holding assembly 41 Upper assembly 411 Upper semicircular side plate 412 Joint concave portion 413 U-shaped packing 414 Connecting rod 415 Stopper 42 Lower assembly portion 421 Lower semicircular side plate 422 Joint convex portion 423 U-shaped packing 424 Connecting rod 425 Piece 5 Guide part 51 Upper guide metal part 511 Arm 512 Guide roller 513 Groove 52 Lower guide metal part 521 Roller holder 522 Guide roller 523 Groove 53 Post 54 Spring 61 Upper semicircular side plate 611 Joint concave part 62 Lower semicircular side plate 621 Piece 622 U-shaped packing 623 Joint convex part 63, 64 Cut material outline

Claims (3)

A pair of upper semicircular side plates connected by a connecting rod, and a pair of lower semicircular side plates in which sandwiching pieces are screwed against the upper and lower surfaces of the upper assembly portion and the joint portion are connected by a connecting rod. A holding assembly that holds the material to be cut by joining the lower assembly at the end of the joint;
A guide unit that includes a guide roller that restrains the axial movement of the holding assembly unit and rotatably holds the holding assembly unit;
A cutting motor unit equipped with a driving motor unit equipped with a cutting grindstone and a sliding table, a sliding table having an upper guide rod and a lower guide rod;
An operation handle provided on the sliding table, a stator fixed to the lower guide rod, and an operation unit including a link connecting the operation handle and the stator;
A cutting machine consisting of The upper recessed portion and the lower assembled portion are formed by engaging a bonding concave portion formed at an end portion of the upper semicircular side plate with a bonding convex portion formed at the bonded end portion of the lower semicircular side plate. The cutting processing machine according to claim 1, further comprising the holding assembly portion that is joined at an end portion of the joining portion. 3. The cutting machine according to claim 1, further comprising: the holding assembly portion that holds the latch provided on the connecting rod of the upper assembly portion on the connecting rod of the lower assembly portion.

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