Grinding disc of polishing machine

Abstract

The utility model provides a polishing machine millstone which comprises a rotary table with an abrasive belt mechanism, an open hole is formed in the rotary table, at least two clamping arms matched with each other are installed at the bottom of the rotary table, one end of each clamping arm is connected with the bottom of the rotary table in a hinged mode, the other end of each clamping arm extends into the open hole and is movably connected with a rolling shaft, and the rolling shaft is movably connected with the rotary table. According to the grinding disc, the clamping arms are used for clamping and fixing the workpiece, under the cooperation of the rolling shafts of the clamping arms and the workpiece, the acting force applied to the workpiece by the clamping arms overcomes the friction force between the abrasive belt and the workpiece, and therefore the grinding head can move smoothly, collision between the abrasive belt and the workpiece is reduced, and the polishing precision and quality are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing machine manufacturing, in particular to a polishing machine grinding disc. Background Art

[0002] At present, abrasive belt polishing machines suitable for tubular workpieces generally consist of a polishing grinding disc and a workpiece clamping mechanism. The workpiece clamping mechanism clamps the tubular workpiece to be polished. The polishing grinding disc is provided with an opening for the tubular workpiece to pass through, and is provided with an abrasive belt polishing mechanism. When working, the polishing grinding disc rotates and moves along the axial direction of the tubular workpiece, and the abrasive belt polishing mechanism performs comprehensive grinding and polishing on the tubular workpiece.

[0003] However, the sanding belt is flat. When grinding and polishing a workpiece, there is a height difference between the unground part and the ground part of the workpiece. At the connection between the ground part and the unground part, the sanding belt and the workpiece surface have a poor fit, which is prone to minor bumps and affects the work of the sanding belt and the polishing accuracy. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a polishing machine grinding disc which can make the grinding disc move smoothly, reduce stumbling and ensure polishing accuracy.

[0005] The utility model achieves the above purpose by:

[0006] The utility model discloses a polishing machine grinding disc, comprising a turntable with a sanding belt mechanism, wherein an opening is provided on the turntable, and at least two mutually matching clamping arms are installed at the bottom of the turntable, one end of the clamping arm is hingedly connected to the bottom of the turntable, and the other end of the clamping arm extends into the opening and is movably connected to a roller.

[0007] Furthermore, the turntable includes a large turntable and a small turntable, the inner hole edge of the small turntable extends upward to form a connecting portion, and the large turntable is mounted on the outside of the connecting portion through a bearing; a connecting block is installed at the bottom of the small turntable, one end of the clamping arm is hingedly connected to the connecting block, and a reset spring is provided on the inner side of the clamping arm, and both ends of the reset spring are respectively abutted against the clamping arm and the connecting block.

[0008] Furthermore, a sleeve shaft is provided on the inner side of the clamp arm, and the return spring is sleeved on the sleeve shaft.

[0009] Furthermore, an elastic hook seat is fixedly installed at the bottom of the connecting block, one end of the clamping arm is hingedly connected to the elastic hook seat, and the hook portion of the elastic hook seat buckles and supports the clamping arm.

[0010] Furthermore, the sanding belt mechanism includes a driving wheel, a driven wheel, and a sanding belt movably connected to the large turntable, wherein the connecting shaft of the driving wheel passes through the large turntable and is fixedly connected to a driving wheel, the large turntable is provided with a slide groove, a slider is slidably connected in the slide groove, the slider is rotatably connected to the driven wheel through a bearing, and the sanding belt is stretched and connected to the driving wheel and the driven wheel.

[0011] Furthermore, the large turntable is also equipped with a tensioning adjustment mechanism, which includes a first tensioning wheel, a rotating lever and a limiting spring. The wheel surface of the first tensioning wheel is tightly against the inner side of the sanding belt. The rotating lever includes a first lever movably connected to the large turntable, and a second lever connected to the first tensioning wheel. The first lever is hinged to the second lever. One end of the limiting spring is fixedly connected to the large turntable, and the other end of the limiting spring is fixedly connected to the first lever.

[0012] Furthermore, the bottom of the large turntable is also movably connected to a second tension wheel, the small turntable and the driving wheel are connected to a belt, and the second tension wheel is tightly against the outer side of the belt.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a polishing machine grinding wheel. Compared with the previous working movement mode of the polishing grinding wheel, only the sanding belt contacts the surface of the workpiece. The utility model adds clamping arms that cooperate with each other to clamp the workpiece on the grinding wheel of the polishing machine, and a roller is movably connected to the other end of the clamping arm, and the roller is used to contact and clamp the workpiece. Since the surface of the roller is a curved surface, it has a high degree of fit with the surface of the workpiece. In this way, during the movement of the grinding wheel, the grinding wheel can apply more force to the surface of the workpiece through the clamping arm, and the friction is reduced through the smooth fit between the roller and the surface of the workpiece. At the same time, the force applied by the clamping arm on the workpiece overcomes the resistance generated by the axial movement of the sanding belt relative to the workpiece, thereby allowing the grinding wheel to move smoothly, reducing the occurrence of bumps, and thus improving the accuracy and quality of polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the top structure of a polishing machine grinding disc in one embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the bottom structure of a polishing machine grinding disc in one embodiment of the utility model;

[0018] Figure 3 It is a schematic structural diagram of a clamping arm in one embodiment of the utility model.

[0019] In the figure, 1 is a turntable, 2 is a sanding belt mechanism, 3 is a clamping arm, 11 is an opening, 31 is a roller, 12 is a large turntable, 13 is a small turntable, 4 is a connecting block, 5 is a return spring, 6 is an elastic hook seat, 61 is a hook part, 21 is a driving wheel, 22 is a driven wheel, 23 is a sanding belt, 131 is a driving wheel, 121 is a slide groove, 122 is a slider, 8 is a tensioning adjustment mechanism, 81 is a first tensioning wheel, 82 is a rotating lever, 83 is a limiting spring, 821 is a first lever, 822 is a second lever, 132 is a second tensioning wheel, 133 is a belt, and 32 is a sleeve shaft. DETAILED DESCRIPTION

[0020] Figure 1-Figure 3 A polishing machine grinding disc in an embodiment of the utility model is shown, including a turntable 1 with a sanding belt mechanism 2, an opening 11 is opened on the turntable 1, at least two mutually cooperating clamping arms 3 are installed at the bottom of the turntable 1, one end of the clamping arm 3 is hingedly connected to the bottom of the turntable 1, and the other end of the clamping arm 3 extends into the opening 11 and is movably connected to a roller 31.

[0021] Compared with the previous working movement mode of the polishing grinding disc, only the sanding belt contacts the surface of the workpiece. The polishing machine grinding disc provided by the utility model is provided with the clamping arms 3 that cooperate with each other to clamp the workpiece on the grinding disc, and the roller 31 is movably connected to the other end of the clamping arm 3, and the roller 31 is used to contact and clamp the workpiece. Since the surface of the roller 31 is a curved surface, it has a high degree of fit with the surface of the workpiece. In this way, during the movement of the grinding disc, the grinding disc can apply more force to the surface of the workpiece through the clamping arm 3, and reduce friction through the smooth fit between the roller 31 and the surface of the workpiece. At the same time, the force applied by the clamping arm 3 on the workpiece overcomes the resistance generated by the axial movement of the sanding belt relative to the workpiece, thereby allowing the grinding disc to move smoothly, reducing the occurrence of bumps, thereby improving the accuracy and quality of polishing.

[0022] Furthermore, in this embodiment, if Figure 2 and Figure 3 As shown, the turntable 1 includes a large turntable 12 and a small turntable 13, the inner hole edge of the small turntable 13 extends upward to form a connecting portion, and the large turntable 12 is sleeved on the outside of the connecting portion through a bearing; a connecting block 4 is installed at the bottom of the small turntable 13, one end of the clamping arm 3 is hingedly connected to the connecting block 4, and a reset spring 5 is provided on the inner side of the clamping arm 3, and the two ends of the reset spring 5 are respectively fixedly connected to the clamping arm 3 and the connecting block 4. When the clamping arm 3 is stretched open by the workpiece, the clamping arm squeezes the reset spring 5, and the reset spring 5 generates a reaction force through elastic deformation and applies it to the clamping arm 3, so that the clamping arm 3 clamps the workpiece. After the workpiece is taken out, the reset spring 5 restores the deformation, thereby pushing the clamping arm 3 to return to its original position.

[0023] Furthermore, in this embodiment, if Figure 3 As shown, a sleeve shaft 32 is provided on the inner side of the clamp arm 3 , and the return spring 5 is sleeved on the sleeve shaft 32 .

[0024] Furthermore, in this embodiment, if Figure 2 As shown, an elastic hook seat 6 is fixedly installed at the bottom of the connecting block 4, one end of the clamping arm 3 is hingedly connected to the elastic hook seat 6, and the hook portion 61 of the elastic hook seat 6 buckles and supports the clamping arm 3. Under the buckling and supporting action of the hook portion 61, the swinging speed of the clamping arm 3 is limited, thereby preventing the clamping arm 3 from swinging too much and failing to clamp the workpiece in time. At the same time, the entire elastic hook seat 6 is made of elastic material, which is conducive to resetting or stretching the clamping arm 3.

[0025] Furthermore, in this embodiment, if Figure 1 and Figure 2 As shown, the large turntable 12 is installed with at least two groups of sanding belt mechanisms 2, and the sanding belt mechanism 2 includes a driving wheel 21, a driven wheel 22, and a sanding belt 23 movably connected to the large turntable 12, wherein the connecting shaft of the driving wheel 21 passes through the large turntable 12 and is fixedly connected to a driving wheel 131, and the large turntable 12 is provided with a slide groove 121, and a slider 122 is slidably connected in the slide groove 121, and the slider 122 is rotatably connected to the driven wheel 22 through a bearing, and the sanding belt 23 is stretched and connected to the driving wheel 21 and the driven wheel 22, and the slider 122 moves along the slide groove 121, and the position of the driven wheel 22 can be adjusted to adapt to the length of the sanding belt 23 and tighten the sanding belt 23.

[0026] Furthermore, in this embodiment, if Figure 1As shown, the large turntable 12 is also equipped with a tension adjustment mechanism 8, which includes a first tension wheel 81, a rotating lever 82 and a limiting spring 83. The wheel surface of the first tension wheel 81 is tightly against the inner side of the abrasive belt 23. The rotating lever 82 includes a first lever 821 movably connected to the large turntable 12, and a second lever 822 connected to the first tension wheel 81. The first lever 821 is hingedly connected to the second lever 822. One end of the limiting spring 83 is fixedly connected to the large turntable 12, and the other end of the limiting spring 83 is fixedly connected to the first lever 821. When the diameter of the workpiece is larger than the two abrasive belts 83, the workpiece is fixedly connected to the first belt 83. When the distance between the abrasive belt 23 and the workpiece is angularly spaced, the abrasive belt 83 is squeezed and pushes the first tensioning wheel 81 to swing into the abrasive belt 23. The first tensioning wheel 81 pushes the second lever 822 to swing through the first lever 821, thereby squeezing the limiting spring 83, causing the limiting spring 83 to deform and generate elastic force, which is applied to the second lever in the reverse direction to balance the pressure of the abrasive belt 23 on the first tensioning wheel 81, so that the first tensioning wheel 81 tightens the abrasive belt 23. When the workpiece is taken out, the limiting spring 83 recovers its deformation and pushes the first tensioning wheel 81 to swing in the reverse direction through the rotating lever 82, thereby pushing and tightening the abrasive belt 23.

[0027] Furthermore, in this embodiment, if Figure 2 As shown, a second tension wheel 132 is movably connected to the bottom of the large turntable 12 , a belt 133 is connected to the small turntable 13 and the driving wheel 131 , and the second tension wheel 132 is tightly against the outer side of the belt 133 .

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation scheme of the present invention and its description are only used to analyze the present invention and are not intended to limit the present invention.

[0029] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the utility model; it should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model; therefore, all equivalent changes and modifications made to the claims and scope of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. A polishing machine grinding disc, comprising a turntable (1) with an abrasive belt mechanism (2), the turntable (1) being provided with an opening (11), characterized in that: At least two mutually cooperating clamping arms (3) are mounted on the bottom of the turntable (1), one end of the clamping arm (3) is hingedly connected to the bottom of the turntable (1), and the other end of the clamping arm (3) extends into the opening (11) and is movably connected to a roller (31).

2. A polishing machine grinding disc according to claim 1, characterized in that: The turntable (1) comprises a large turntable (12) and a small turntable (13); the edge of the inner hole of the small turntable (13) extends upward to form a connecting portion, and the large turntable (12) is sleeved on the outside of the connecting portion via a bearing; a connecting block (4) is installed at the bottom of the small turntable (13); one end of the clamping arm (3) is hingedly connected to the connecting block (4); a return spring (5) is provided on the inner side of the clamping arm (3); and the two ends of the return spring (5) are respectively in contact with the clamping arm (3) and the connecting block (4).

3. A polishing machine grinding disc according to claim 2, characterized in that: A sleeve shaft (32) is provided on the inner side of the clamp arm (3), and the return spring (5) is sleeved on the sleeve shaft (32).

4. A polishing machine grinding disc according to claim 2, characterized in that: An elastic hook seat (6) is fixedly mounted on the bottom of the connection block (4); one end of the clamp arm (3) is hingedly connected to the elastic hook seat (6); and a hook portion (61) of the elastic hook seat (6) buckles and supports the clamp arm (3).

5. A polishing machine grinding disc according to claim 3 or 4, characterized in that: The sanding belt mechanism (2) comprises a driving wheel (21) movably connected to the large rotating disk (12), a driven wheel (22), and a sanding belt (23), wherein a connecting shaft of the driving wheel (21) passes through the large rotating disk (12) and is fixedly connected to a driving wheel (131), the large rotating disk (12) is provided with a slide groove (121), a sliding block (122) is slidably connected in the slide groove (121), the sliding block (122) is rotatably connected to the driven wheel (22) via a bearing, and the sanding belt (23) is stretched and connected to the driving wheel (21) and the driven wheel (22).

6. A polishing machine grinding disc according to claim 5, characterized in that: The large rotating disk (12) is also provided with a tension adjustment mechanism (8), the tension adjustment mechanism (8) comprising a first tension wheel (81), a rotating lever (82) and a limiting spring (83), the wheel surface of the first tension wheel (81) being in close contact with the inner side of the abrasive belt (23), the rotating lever (82) comprising a first lever (821) movably connected to the large rotating disk (12), and a second lever (822) connected to the first tension wheel (81), the first lever (821) and the second lever (822) being hingedly connected, one end of the limiting spring (83) being fixedly connected to the large rotating disk (12), and the other end of the limiting spring (83) being fixedly connected to the first lever (821).

7. A polishing machine grinding disc according to claim 6, characterized in that: The bottom of the large turntable (12) is also movably connected to a second tension wheel (132), the small turntable (13) and the driving wheel (131) are connected to a belt (133), and the second tension wheel (132) is tightly against the outer side of the belt (133).

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