A polishing device for a screw

Abstract

A polishing device of a screw rod comprises front and back channel steels, a guide wheel vehicle is installed on the channel steels, the screw rod is placed on the guide wheel vehicle, upper and lower rails are installed on the lower surface of the channel steels, a polishing support is installed on the upper and lower rails through a sliding sleeve, a driving wheel driven by a motor is installed at the back of the channel steels, and a sand belt is wound around the driving wheel and a sand belt tensioning mechanism of the polishing support. In work, the sand belt is in contact with the screw ridge and screw groove of the screw rod, the rotation of the sand belt is combined with the rotation of the screw rod, and the screw ridge inclined surface and the screw groove are polished. The device automatically tensions the sand belt through the gravity sag of the polishing support, simultaneously adjusts the universal adjustment of the polishing support, polishes the screw ridge inclined surface and the screw groove of the screw rod, has high polishing efficiency, is simple to operate, and has high cost performance.

Description

Technical Field

[0001] This invention relates to a polishing apparatus, particularly for polishing the beveled surface and groove of a screw. Background Technology

[0002] Screws are widely used in plastic molding equipment, such as plastic profile extruders and injection molding machines. The screw and barrel are core components of plastic molding equipment. They are the heating, extrusion, and plasticizing parts, and are the core of plastic machinery. Currently, screw processing is mostly CNC-controlled. For screw polishing, especially the polishing of the screw ridges and grooves, because the shape and specifications of the screw are constantly changing, and the spatial positions of the screw ridges and grooves intersect, it is essential to use a simple machine to complete multi-position, multi-angle polishing. Summary of the Invention

[0003] To address the shortcomings mentioned above, the present invention provides a polishing device for screws.

[0004] To achieve the above objectives, the present invention provides a polishing device for a screw, comprising channel steel distributed at the front and rear, a guide wheel mounted on the channel steel, a screw placed on the guide wheel, an upper rail and a lower rail mounted on the underside of the channel steel, a grinding bracket mounted on the upper rail and the lower rail via an upper sliding sleeve and a lower sliding sleeve, a drive wheel driven by a motor mounted at the rear of the channel steel, and a sanding belt wound around the sanding belt tensioning mechanism at the drive wheel and the grinding bracket.

[0005] As a further improvement of the present invention, there are a total of 4 guide wheels, which are distributed on the left and right sides of the channel steel. Each guide wheel includes a rolling component that rolls in contact with the channel steel, a support placed on the upper part of the rolling component, and a rotating component mounted on the support.

[0006] As a further improvement of the present invention, the bracket includes bottom and left and right upright plates. A U-shaped groove is machined in the middle of the upright plate. Roller flanges are fixedly connected to both sides of the bottom by bolts. The rollers are fixed by the roller flanges. Bushings I are installed at the contact points between the rollers and the roller flanges. Bearings are installed at both ends of the rollers and are axially limited by shaft clamps. Wheels are installed on the outside of the bearings and are axially limited by hole clamps. The wheels are stepped and match the upper edge of the channel steel.

[0007] As a further improvement of the present invention, the rotating component includes a rotating shaft resting on a U-shaped groove. The right side of the rotating shaft includes a large end. The rotating shaft is rotatably connected to a rolling wheel through bushing II. A positioning sleeve is installed on the other side of the large end to axially position the rotating shaft. The rolling wheel is spindle-shaped and is used to support the screw.

[0008] As a further improvement of the present invention, the grinding bracket includes an upper base plate, which is connected to an upright rod via a hinge. The lower part of the upright rod is connected to an upper rail via an upper sliding sleeve. A bent part is machined at the front end of the upper base plate. The bent part is elastically connected to an inclined upright rod via a buffer. The lower part of the inclined upright rod is connected to a lower rail via a lower sliding sleeve. An adjustment part of the grinding bracket is installed on the upper base plate.

[0009] As a further improvement of the present invention, the bracket adjustment part includes a lower part of the adjustment part that is movably connected to the upper base plate. The lower part of the adjustment part is rotatably connected to the upper part of the adjustment part through a hinge. A long groove is machined at the middle position of the upper part of the adjustment part, and a sandpaper tensioning mechanism is installed on the long groove.

[0010] As a further improvement of the present invention, arc-shaped grooves are machined on both sides of the lower part of the adjustment part, and bolts are fixed at the corresponding positions of the upper base plate and the arc-shaped grooves. The lower part of the adjustment part is fixed to the upper base plate by means of wing nuts I.

[0011] As a further improvement of the present invention, a positioning part is machined at the hinge, and a round hole is machined at the corresponding position of the lower part and the upper part of the positioning plate, and a pin is fitted thereon.

[0012] As a further improvement of the present invention, the sandpaper tensioning mechanism includes a tensioning shaft that passes through a long groove and is locked by a wing nut. The two ends of the tensioning shaft are connected to tensioning wheels through bearings I, and the tensioning wheels are drum-shaped.

[0013] The beneficial effects of this invention are as follows:

[0014] The device automatically tensions the sanding belt by lowering the grinding support by gravity, and simultaneously adjusts the grinding support in all directions to polish the screw's bevel and groove surfaces. It has high grinding efficiency, is easy to operate, and offers excellent cost performance. Attached Figure Description

[0015] Figure 1 This is a front view of a screw polishing device according to the present invention;

[0016] Figure 2 This is an enlarged view of component 6;

[0017] Figure 3 for Figure 2 Side view;

[0018] Figure 4 This is an enlarged view of component 4;

[0019] Figure 5 for Figure 4 Side view

[0020] Figure 6 for Figure 4 Enlarged view of part A in the middle;

[0021] Figure 7 for Figure 4 Enlarged view of part B in the middle;

[0022] Figure 8 for Figure 5 Enlarged view of part C in the middle.

[0023] In the diagram: 1. Lower rail; 2. Upper rail; 3. Channel steel; 31. Upper edge of channel steel; 4. Guide wheel; 41. Rolling component; 411. Roller; 412. Roller flange; 413. Bushing I; 414. Wheel; 415. Hole clamp; 416. Bearing; 417. Shaft clamp; 42. Bracket; 421. Base plate; 422. Vertical plate; 423. U-shaped groove; 43. Rotating component; 431. Positioning sleeve; 432. Rotating shaft; 4321. Large end; 433. Bushing II; 434. Rolling wheel; 5. Screw; 6. Grinding support; 61. Lower sliding sleeve; 62. Upper sliding sleeve; 63. Upright rod; 64. Buffer; 65. Hinge; 66. Upper base plate; 661. Bending section; 67. Grinding support adjustment section; 671. Lower part of adjustment section; 672. Hinge; 673. Upper part of adjustment section; 6731. Long groove; 674. Sanding cloth tensioning mechanism; 6741. Tensioning wheel; 6742. Tensioning shaft; 6743. Wing nut; 6744. Bearing I; 68. Positioning section; 69. Inclined upright rod; 7. Motor; 8. Drive wheel; 9. Sanding cloth belt. Detailed Implementation

[0024] like Figure 1 As shown, the present invention provides a screw polishing device comprising channel steel 3 distributed front and rear, a guide wheel 4 mounted on the channel steel 3, a screw 5 placed on the guide wheel 4, an upper rail 2 and a lower rail 1 mounted below the channel steel 3, a grinding bracket 6 mounted on the upper rail 2 and the lower rail 1 via an upper sliding sleeve 62 and a lower sliding sleeve 61, a drive wheel 8 driven by a motor 7 mounted behind the channel steel 3, and a sanding belt 9 wound around the sanding belt tensioning mechanism 674 at the drive wheel 8 and the grinding bracket 6.

[0025] There are four guide wheel carriages 4, distributed on the left and right sides of the channel steel 3. Each guide wheel carriage 4 includes a rolling component 41 that rolls in contact with the channel steel 3, a support 42 placed on the upper part of the rolling component 41, and a rotating component 43 mounted on the support 42. The support 42 includes a bottom 421 and left and right side upright plates 422. A U-shaped groove 423 is machined in the middle of the upright plate 422. Roller flanges 412 are bolted to both sides of the bottom 421. Rollers 411 are fixed by the roller flanges 412. Bushings 1413 are installed at the contact point between the rollers 411 and the roller flanges 412. Bearings 416 are installed at both ends of the rollers 411 and are axially limited by axle clamps 417. Wheels 414 are installed on the outside of the bearings 416 and are axially limited by hole clamps 415. The wheels 414 are stepped and match the upper edge 31 of the channel steel 3. Rotating component 43 includes a rotating shaft 432 resting on a U-shaped groove 423. The right side of the rotating shaft 432 includes a large end 4321. The rotating shaft 432 is rotatably connected to a rolling wheel 434 via a bushing II 433. A positioning sleeve 431 is installed on the other side of the large end 4321 to axially position the rotating shaft 432. The rolling wheel 434 is spindle-shaped and is used to support the screw 5 (see...). Figure 4-8 ).

[0026] The grinding support 6 includes an upper base plate 66, which is connected to an upright rod 63 via a hinge 65. The lower part of the upright rod 63 is connected to the upper rail 2 via an upper sliding sleeve 62. A bent portion 661 is machined at the front end of the upper base plate 66. The bent portion 661 is elastically connected to an inclined upright rod 69 via a buffer member 64. The lower part of the inclined upright rod 69 is connected to the lower rail 1 via a lower sliding sleeve 61. A grinding support adjustment part 67 is installed on the upper base plate 66. The grinding support adjustment part 67 includes a lower adjustment part 671 that is movably connected to the upper base plate 66. The lower adjustment part 671 is rotatably connected to the upper adjustment part 673 via a hinge member 672. A long groove 6731 is machined at the middle position of the upper adjustment part 673, and a sandpaper tensioning mechanism 674 is installed on the long groove 6731. Arc-shaped grooves are machined on both sides of the lower part 671 of the adjusting section. Bolts are fixed to the upper base plate 66 at corresponding positions of the arc-shaped grooves, and the lower part 671 of the adjusting section is fixed to the upper base plate 66 by wing nuts I. A positioning part 68 is machined at the hinge 672. The positioning plate 68 has round holes machined at corresponding positions on the lower part 671 and the upper part 673 of the adjusting section, and is fitted with pins. The sandpaper tensioning mechanism 674 includes a tensioning shaft 6742 that passes through the long groove 6731 and is locked by a wing nut 6743. Both ends of the tensioning shaft 6742 are connected to a tensioning wheel 6741 via bearings I 6744. The tensioning wheel 6741 is drum-shaped (see...). Figure 2-3 ).

[0027] The device automatically tensions the sanding belt by lowering the grinding support by gravity, and simultaneously adjusts the grinding support in all directions to polish the screw's bevel and groove surfaces. It has high grinding efficiency, is easy to operate, and offers excellent cost performance.

[0028] In practical use, the invention will be described in conjunction with the accompanying drawings for ease of understanding;

[0029] During operation, the screw rests on the rolling wheels of the guide wheel carriage. Due to its spindle-shaped shape, the two sets of screws are symmetrically placed (see...). Figure 5 The screw rotation does not damage the screw edges. The sanding belt is wound between the tensioning wheel and the drive wheel. Since the sanding belt tensioning mechanism is connected to the upright rod through a hinge and elastically connected to the inclined upright rod through a buffer, the sanding belt tensioning mechanism generates an outward torque along the hinge, tightening the sanding belt. Because the sanding belt is a flexible material, the grinding surface of the sanding belt is in complete contact with the bottom of the screw edges. The rotating motor drives the sanding belt to move, and the screw can be rotated manually or mechanically. The sanding belt grinds the screw grooves (at present, due to different requirements for grinding the screw grooves, the precision requirements for grinding and polishing different sections of the screw groove are inconsistent, so the screw is still mostly rotated manually). When the sanding belt is grinding the screw grooves, since the screw grooves are obliquely distributed, the sanding belt will generate a force along the track on the screw, causing the guide wheel 4 to drive the screw to move left and right along the track. At the same time, the grinding bracket moves left and right through the contact of the upper and lower sliding sleeves with the upper and lower tracks, grinding and polishing the screw groove positions in different directions.

[0030] When it is necessary to grind and polish the beveled surface of the screw, adjust the positioning part at the hinge, pull out the pin, and rotate the upper and lower parts of the adjustment part by an angle and fix them by the pin. At this time, the tension wheel makes an angle with the horizontal plane, and the sanding belt is wound between the tension wheel and the drive wheel. The movement trajectory of the sanding belt in space makes an angle with the horizontal plane. Since the sanding belt is supported by the buffer, it has a certain degree of elasticity. The sanding belt and the beveled surface of the screw are completely in contact, and the grinding and polishing effect of the beveled surface of the screw is better. When the diameter of the screw changes, the sanding tensioning mechanism is adjusted appropriately along the long groove.

[0031] The roller is spindle-shaped, which makes it easy for the sanding belt to be wound onto the tensioning roller. At the same time, during grinding and polishing, the sanding belt moves left and right along the spindle shape, which makes full contact between the sanding belt and the screw ridge and groove, resulting in more uniform and thorough grinding and polishing.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A polishing device for a screw, characterized by: The system includes channel steel (3) distributed front and rear, a guide wheel carriage (4) mounted on the channel steel (3), a screw (5) placed on the guide wheel carriage (4), an upper rail (2) and a lower rail (1) mounted on the underside of the channel steel (3), a grinding bracket (6) mounted on the upper rail (2) and the lower rail (1) via an upper sliding sleeve (62) and a lower sliding sleeve (61), a drive wheel (8) driven by a motor (7) mounted on the rear of the channel steel (3), and a sanding belt (9) wound around the drive wheel. The sandpaper tensioning mechanism (674) at the wheel (8) and the grinding bracket (6); there are 4 guide wheels (4) in total, distributed on the left and right sides of the channel steel (3), each guide wheel (4) includes a rolling component (41) that rolls in contact with the channel steel (3), a bracket (42) placed on the upper part of the rolling component (41), and a rotating component (43) mounted on the bracket (42); the rotating component (43) includes a rotating shaft resting on the U-shaped groove (423) ( 432), the right side of the rotating shaft (432) includes a large end (4321), the rotating shaft (432) is rotatably connected to the rolling wheel (434) through bushing II (433), and a positioning sleeve (431) is installed on the other side of the large end (4321) to axially position the rotating shaft (432). The rolling wheel (434) is spindle-shaped and is used to support the screw (5); the grinding bracket (6) includes an upper base plate (66), the upper base plate (66) is hinged The chain (65) is connected to the upright rod (63), the lower part of the upright rod (63) is connected to the upper track (2) through the upper sliding sleeve (62), the front end of the upper base plate (66) is processed with a bent part (661), the bent part (661) is elastically connected to the inclined upright rod (69) through the buffer (64), the lower part of the inclined upright rod (69) is connected to the lower track (1) through the lower sliding sleeve (61), and the grinding bracket adjustment part (67) is installed on the upper base plate (66).

2. A device for polishing a screw as defined in claim 1, characterized in that: The bracket (42) includes a bottom (421) and left and right side upright plates (422). A U-shaped groove (423) is machined in the middle of the upright plate (422). Roller flanges (412) are fixedly connected to both sides of the bottom (421) by bolts. The roller (411) is fixed by the roller flange (412). A bushing I (413) is installed at the contact point between the roller (411) and the roller flange (412). Bearings (416) are installed at both ends of the roller (411) and are axially limited by shaft clips (417). Wheels (414) are installed on the outside of the bearings (416) and are axially limited by hole clips (415). The wheels (414) are stepped and match the upper edge (31) of the channel steel (3).

3. The polishing device for a screw according to claim 1, characterized in that: The grinding bracket adjustment part (67) includes a lower adjustment part (671) that is movably connected to the upper base plate (66). The lower adjustment part (671) is rotatably connected to the upper adjustment part (673) via a hinge (672). A long groove (6731) is machined at the middle position of the upper adjustment part (673), and a sandpaper tensioning mechanism (674) is installed on the long groove (6731).

4. A screw polishing apparatus according to claim 3, wherein: The lower part (671) of the adjustment part is machined with arc-shaped grooves on both sides. The upper base plate (66) is fixed with bolts at the corresponding positions of the arc-shaped grooves, and the lower part (671) of the adjustment part is fixed with the upper base plate (66) by means of wing nuts I.

5. A screw polishing apparatus as claimed in claim 3, wherein: A positioning part (68) is machined at the hinge (672). The positioning part (68) has round holes machined at corresponding positions on the lower part (671) and the upper part (673) of the adjustment part, and is fitted with pins.

6. A screw polishing apparatus according to claim 3, wherein: The sand tensioning mechanism (674) includes a tensioning shaft (6742) that passes through the long groove (6731) and is locked by a wing nut (6743). The two ends of the tensioning shaft (6742) are connected to a tensioning wheel (6741) via a bearing I (6744). The tensioning wheel (6741) is drum-shaped.

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