Double-sided grinding machine

Abstract

The utility model relates to the technical field of workpiece grinding, in particular to a double-sided grinding machine. Comprising a workbench, a sleeve is fixedly connected to the upper surface of the workbench, a fixed gear is fixedly connected to the position, close to the top end, of the inner wall of the sleeve, a rotary table is rotationally arranged on the upper surface of the workbench, and a driving mechanism is arranged on the lower side of the rotary table. When a workpiece body is placed in the containing groove in the planetary gear and the two ends of the workpiece body are in contact with the lower grinding disc and the upper grinding disc respectively, the servo motor is started to enable the rotary table, the main shaft, the lower grinding disc and the upper grinding disc to rotate, and the planetary gear drives the workpiece body to do circular motion around the main shaft; and meanwhile, the planetary gear drives the workpiece body to rotate in the direction opposite to the rotating direction of the main shaft, and the efficiency of polishing the workpiece body through the lower grinding disc and the upper grinding disc is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece grinding, in particular to a double-sided grinding machine. Background Art

[0002] A grinder is a machine that uses a grinding tool coated with or embedded with abrasives to grind the surface of a workpiece. It is mainly used to grind high-precision planes, internal and external cylindrical surfaces, conical surfaces, spherical surfaces, threaded surfaces and other surfaces in the workpiece.

[0003] When used, the grinder in the prior art can usually only grind and polish one side of the workpiece. If both sides of the workpiece need to be ground, the grinder needs to be paused and the workpiece needs to be turned over when one side of the workpiece is ground to perform another grinding. This process takes a long time and reduces the processing efficiency of the grinder. In view of this, we propose a double-sided grinder. Utility Model Content

[0004] The purpose of the present invention is to provide a double-sided grinding machine to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, one of the purposes of the present invention is to provide a double-sided grinding machine, comprising a workbench, the upper surface of the workbench is fixedly connected with a sleeve, the inner wall of the sleeve is fixedly connected with a fixed gear near the top, and a turntable is rotatably provided on the upper surface of the workbench, a driving mechanism is provided on the lower side of the turntable, the driving mechanism is used to drive the turntable to rotate, a main shaft is fixedly connected to the center of the side wall of the turntable, a lower grinding disc is coaxially fixedly connected to the side wall of the main shaft, an upper grinding disc is provided above the lower grinding disc, a grinding chamber is provided between the lower grinding disc and the upper grinding disc, a mounting mechanism is provided on the upper grinding disc, and the mounting mechanism mounts and fixes the upper grinding disc on the main shaft, and the main shaft A power gear is coaxially fixedly connected to the side wall, and a plurality of planetary gears are arranged in an annular array outside the power gear. The plurality of planetary gears are meshed with the power gear and the fixed gear, and the planetary gears and the power gear are both arranged inside the grinding chamber. A plurality of placement grooves are opened on the planetary gears, and a workpiece body is arranged inside the placement grooves. The two ends of the workpiece body are respectively in contact with the opposite sides of the lower grinding disc and the upper grinding disc. When the main shaft drives the power gear, the lower grinding disc and the upper grinding disc to rotate, the planetary gears drive the workpiece body to perform circular motion around the main shaft, and at the same time, the planetary gears themselves drive the workpiece body to rotate in a direction opposite to the rotation direction of the main shaft. A chip removal mechanism is provided at the bottom of the turntable.

[0006] As a further improvement of the present technical solution, the driving mechanism includes a driven gear coaxially fixedly connected to the inner wall of the turntable, the driven gear is internally meshed with a driving gear, and a servo motor for driving the driving gear to rotate is provided on the lower side of the driving gear, and the servo motor is installed on the workbench.

[0007] As a further improvement of the present technical solution, the mounting mechanism includes an upper pressure plate arranged on the upper surface of the upper grinding plate, an assembly plate is provided at the center of the upper surface of the upper pressure plate, a mounting bolt is fixedly connected at the center of the assembly plate, and the lower end of the mounting bolt passes through the upper pressure plate and is threadedly connected to the main shaft.

[0008] As a further improvement of this technical solution, a plurality of adjustment bolts are threadedly connected in an annular array on the upper pressure plate, and the lower ends of the adjustment bolts extend to the position between the upper pressure plate and the upper grinding plate, and the lower grinding plate is fixedly arranged on the upper surface of the turntable.

[0009] As a further improvement of the present technical solution, there is a gap between the inner wall of the fixed gear and the lower grinding disc, the inner wall of the sleeve is fixedly connected to a retaining ring, the circumferential inner wall of the retaining ring is in close contact with the circumferential outer wall of the turntable, and the retaining ring is arranged below the lower grinding disc, and two external air ducts are symmetrically opened on the side wall of the turntable, and an internal air duct is opened inside the main shaft, and the internal air duct is a T-shaped structure, and the opposite ends of the internal air duct are respectively connected to the two external air ducts, and the lower end of the main shaft passes through the top of the workbench and extends downward.

[0010] As a further improvement of the present technical solution, a partition is fixedly connected to the inside of the workbench, and the chip removal mechanism includes a vacuum cleaner fixedly installed on the upper surface of the partition. The top of the vacuum cleaner is fixedly connected to a hard air duct, and the upper end of the hard air duct is fixedly connected to a connecting flange. The connecting flange is rotatably set at the lower end of the main shaft, and the connecting flange connects the inner air duct with the interior of the hard air duct.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This double-sided grinding machine places the workpiece body in the placement slot on the planetary gear and makes the two ends of the workpiece body contact the lower grinding disc and the upper grinding disc respectively. Then, the servo motor is started to rotate the turntable, spindle, lower grinding disc and upper grinding disc, so that the planetary gear drives the workpiece body to make a circular motion around the spindle, and the lower grinding disc and the upper grinding disc grind the upper and lower end surfaces of the workpiece body respectively. At the same time, the planetary gear itself drives the workpiece body to rotate in the direction opposite to the rotation direction of the spindle, thereby improving the efficiency of the lower grinding disc and the upper grinding disc in grinding the workpiece body.

[0013] 2. In this double-sided grinder, when centrifugal force throws the grinding chips off the lower grinding disc, the grinding chips fall into the inside of the receiving chamber through the gap, thereby preventing the grinding chips from accumulating on the upper surface of the lower grinding disc and affecting the quality of the grinded workpiece. By starting the vacuum cleaner to suck in the grinding chips inside the receiving chamber, the grinding chips inside the receiving chamber can be quickly cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is one of the cross-sectional views of the overall structure of the utility model;

[0016] Figure 3 For the utility model Figure 2 Schematic diagram of the structure of the chip removal mechanism;

[0017] Figure 4 This is the second cross-sectional view of the overall structure of the utility model;

[0018] Figure 5 It is a partial exploded view of the utility model.

[0019] The meaning of each number in the figure is:

[0020] 1. Workbench; 11. Partition;

[0021] 2. Sleeve; 21. Retaining ring;

[0022] 3. Fixed gear;

[0023] 4. Turntable; 41. External air duct;

[0024] 5. Driving mechanism; 51. Driven gear; 52. Servo motor; 53. Driving gear;

[0025] 6. Chip removal mechanism; 61. Vacuum cleaner; 62. Hard air duct; 63. Connecting flange;

[0026] 7. Spindle; 71. Internal air duct; 72. Lower grinding disc; 73. Upper grinding disc; 74. Support groove; 75. Upper pressure plate; 76. Assembly plate; 77. Mounting bolts; 78. Adjustment bolts;

[0027] 8. Power gear;

[0028] 9. Planetary gear; 91. Workpiece body. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-Figure 5 As shown, one of the purposes of this embodiment is to provide a double-sided grinding machine, including a workbench 1, a sleeve 2 is fixedly connected to the upper surface of the workbench 1, a fixed gear 3 is fixedly connected to the inner wall of the sleeve 2 near the top, and a turntable 4 is rotatably provided on the upper surface of the workbench 1, and a driving mechanism 5 is provided on the lower side of the turntable 4. The driving mechanism 5 is used to drive the turntable 4 to rotate. The structure of the driving mechanism 5 is detailed below, with reference to Figure 2 The driving mechanism 5 includes a driven gear 51 coaxially fixedly connected to the inner wall of the turntable 4. The driven gear 51 is internally meshed with a driving gear 53. A servo motor 52 is provided on the lower side of the driving gear 53 to drive the driving gear 53 to rotate. The servo motor 52 is installed on the workbench 1. When the output shaft of the servo motor 52 drives the driving gear 53 to rotate, the driven gear 51 drives the turntable 4 to rotate through the meshing transmission of the driving gear 53 and the driven gear 51. At the same time, a main shaft 7 is fixedly connected to the center of the upper side wall of the turntable 4. The main shaft 7 A lower grinding disc 72 is coaxially fixedly connected to the side wall of the turntable 4, and the lower grinding disc 72 is fixedly arranged on the upper surface of the turntable 4. An upper grinding disc 73 is arranged above the lower grinding disc 72. A grinding chamber is set between the lower grinding disc 72 and the upper grinding disc 73. A mounting mechanism is provided on the upper grinding disc 73, and the mounting mechanism fixes the upper grinding disc 73 on the main shaft 7. When the turntable 4 drives the main shaft 7 to rotate, the main shaft 7 can drive the upper grinding disc 73 to rotate synchronously through the mounting mechanism. At the same time, the setting of the mounting mechanism can facilitate workers to quickly disassemble and assemble the upper grinding disc 73.

[0032] Reference Figure 5A power gear 8 is coaxially fixedly connected to the side wall of the main shaft 7, and a plurality of planetary gears 9 are arranged in a ring array outside the power gear 8. The plurality of planetary gears 9 are meshed with the power gear 8 and the fixed gear 3, and the planetary gears 9 and the power gear 8 are both arranged inside the grinding chamber. When the main shaft 7 drives the power gear 8 to rotate, the meshing transmission between the power gear 8 and the plurality of planetary gears 9 causes the plurality of planetary gears 9 to rotate synchronously. The meshing transmission between the planetary gears 9 and the fixed gear 3 causes the planetary gears 9 to move inside the grinding chamber, that is, while the planetary gears 9 rotate themselves, the planetary gears 9 will make a circular motion around the main shaft 7, and the direction of rotation of the planetary gears 9 themselves is opposite to the direction of rotation of the main shaft 7. A plurality of placement grooves are provided on the planetary gear 9, and a workpiece body 91 is provided inside the placement groove. The workpiece body 91 The two ends are in contact with the opposite sides of the lower grinding disc 72 and the upper grinding disc 73 respectively. When the main shaft 7 drives the power gear 8, the lower grinding disc 72 and the upper grinding disc 73 to rotate, the planetary gear 9 drives the workpiece body 91 to make a circular motion around the main shaft 7, and the upper end surface of the workpiece body 91 and the upper grinding disc 73 move relative to each other, and the lower end surface of the workpiece body 91 and the lower grinding disc 72 move relative to each other, so that the upper and lower end surfaces of the workpiece body 91 can be polished at the same time. At the same time, the planetary gear 9 itself drives the workpiece body 91 to rotate in a direction opposite to the rotation direction of the main shaft 7, and the workpiece body 91 and the grinding disc rotate in different directions at the same time, so that the rotation speed of the lower grinding disc 72 and the upper grinding disc 73 is faster than that of the workpiece body 91, thereby improving the efficiency of the lower grinding disc 72 and the upper grinding disc 73 in polishing the workpiece body 91.

[0033] The grinding chips generated by the lower grinding disc 72 and the upper grinding disc 73 when grinding the workpiece body 91 will fall on the upper surface of the lower grinding disc 72. When the main shaft 7 drives the lower grinding disc 72 to rotate, the grinding chips on the lower grinding disc 72 will move in the direction away from the main shaft 7 under the action of centrifugal force. There is a gap between the inner wall of the fixed gear 3 and the lower grinding disc 72. The inner wall of the sleeve 2 is fixedly connected to the retaining ring 21. The circumferential inner wall of the retaining ring 21 is in close contact with the circumferential outer wall of the turntable 4, and the retaining ring 21 is arranged below the lower grinding disc 72. A receiving cavity is formed between the upper surface of the retaining ring 21, the inner wall of the sleeve 2 and the outer wall of the turntable 4. When the centrifugal force throws the grinding chips off the lower grinding disc 72, the grinding chips fall into the inside of the receiving cavity through the gap, so as to avoid the grinding chips accumulating on the upper surface of the lower grinding disc 72 and affecting the quality of the ground workpiece body 91.

[0034] In order to facilitate the collection of grinding chips inside the receiving chamber, two external air ducts 41 are symmetrically opened on the side wall of the turntable 4. The ends of the two external air ducts 41 away from each other are connected to the interior of the receiving chamber. An internal air duct 71 is opened inside the main shaft 7. The internal air duct 71 is a T-shaped structure. The opposite ends of the internal air duct 71 are respectively connected to the two external air ducts 41. The lower end of the main shaft 7 passes through the top of the workbench 1 and extends downward. At the same time, a chip removal mechanism 6 is provided at the bottom of the turntable 4. The chip removal mechanism 6 is used to extract the air inside the internal air duct 71. The structure of the chip removal mechanism 6 is detailed below. Figure 3 The interior of the workbench 1 is fixedly connected to a partition 11, and the chip removal mechanism 6 includes a dust collector 61 fixedly installed on the upper surface of the partition 11. The top of the dust collector 61 is fixedly connected to a hard air duct 62, and the upper end of the hard air duct 62 is fixedly connected to a connecting flange 63. The connecting flange 63 is rotatably set at the lower end of the main shaft 7, and the connecting flange 63 connects the inner air duct 71 with the interior of the hard air duct 62. When the main shaft 7 rotates, the dust collector 61, the hard air duct 62 and the connecting flange 63 are in a stationary state. After the dust collector 61 is started, the air inside the receiving chamber is extracted through the hard air duct 62, the inner air duct 71 and the outer air duct 41, and the external air is replenished into the interior of the receiving chamber from top to bottom through the gap, thereby forming an airflow inside the hard air duct 62, the inner air duct 71 and the outer air duct 41, and the grinding chips inside the receiving chamber are mixed in the airflow and sucked in by the dust collector 61, thereby realizing rapid cleaning of the grinding chips inside the receiving chamber.

[0035] The top of the main shaft 7 is provided with a supporting groove 74, and the upper grinding disc 73 is coaxially slidably sleeved on the outer side of the main shaft 7, and the lower surface of the upper grinding disc 73 is in close contact with the inner wall of the supporting groove 74. The supporting groove 74 prevents the upper grinding disc 73 from falling downward, so that the space for placing the workpiece body 91 is reserved between the upper grinding disc 73 and the lower grinding disc 72. At the same time, the supporting groove 74 allows the upper grinding disc 73 to slide only in the vertical direction along the outer wall of the main shaft 7, so that the main shaft 7 can drive the upper grinding disc 73 to rotate. The structure of the mounting mechanism is detailed below. Figure 4 The mounting mechanism includes an upper pressure plate 75 arranged on the upper surface of the upper grinding disc 73, and an assembly plate 76 is provided at the center of the upper surface of the upper pressure plate 75. A mounting bolt 77 is fixedly connected to the center of the assembly plate 76. The lower end of the mounting bolt 77 passes through the upper pressure plate 75 and is threadedly connected to the spindle 7. The assembly plate 76 prevents the upper grinding disc 73 from moving vertically upward, thereby firmly mounting the upper grinding disc 73 at a predetermined position on the spindle 7, so that the upper end of the workpiece body 91 inside the placement groove contacts the upper grinding disc 73, and the upper grinding disc 73 plays the role of grinding the workpiece body 91.

[0036] Different workpiece bodies 91 require different grinding forces. In order to adjust the grinding force of the lower grinding disc 72 and the upper grinding disc 73 on the workpiece body 91, a number of adjustment bolts 78 are threadedly connected in a circular array on the upper pressure plate 75. The lower end of the adjustment bolt 78 extends to the position between the upper pressure plate 75 and the upper grinding disc 73. When the worker turns the adjustment bolt 78, the adjustment bolt 78 is threadedly connected to the upper pressure plate 75, so that the adjustment bolt 78 moves vertically downward. When the downward adjusting bolt 78 contacts the upper grinding disc 73, the adjusting bolt 78 presses the upper grinding disc 73 downward, thereby increasing the pressure exerted by the upper grinding disc 73 and the upper grinding disc 73 on the two ends of the workpiece body 91, thereby adjusting the grinding force of the lower grinding disc 72 and the upper grinding disc 73 on the workpiece body 91 to meet the grinding requirements of different types of workpiece bodies 91.

[0037] When the device has finished grinding both ends of the workpiece body 91, turn off the servo motor 52 to stop the turntable 4, main shaft 7, lower grinding disc 72, upper grinding disc 73 and planetary gear 9, and then remove the upper grinding disc 73 from the main shaft 7. The specific operation is as follows: rotate the assembly plate 76 and the mounting bolt 77, separate the mounting bolt 77 from the main shaft 7, and then remove the upper pressure plate 75 and the upper grinding disc 73 from the main shaft 7 in turn. The workpiece body 91 can be taken out from the placement slot on the planetary gear 9, and the polished workpiece body 91 can be unloaded.

[0038] When using this device to grind the workpiece body 91, first place several workpiece bodies 91 in several placement slots respectively, so that the lower end surface of the workpiece body 91 contacts the upper surface of the lower grinding disc 72, and then install the upper grinding disc 73 and the upper pressure plate 75 on the main shaft 7, so that the upper end surface of the workpiece body 91 contacts the lower surface of the upper grinding disc 73, start the servo motor 52 to rotate the turntable 4, the main shaft 7, the lower grinding disc 72 and the upper grinding disc 73, so that the planetary gear 9 drives the workpiece body 91 to perform a circular motion around the main shaft 7, so that the upper and lower end surfaces of the workpiece body 91 can be polished at the same time, and at the same time, the planetary gear 9 itself drives the workpiece body 91 to rotate in the direction opposite to the rotation direction of the main shaft 7, thereby improving the efficiency of the lower grinding disc 72 and the upper grinding disc 73 in grinding the workpiece body 91.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-sided grinding machine, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is fixedly connected with a sleeve (2), and a fixed gear (3) is fixedly connected to the inner wall of the sleeve (2) near the top. A turntable (4) is rotatably provided on the upper surface of the workbench (1), and a driving mechanism (5) is provided on the lower side of the turntable (4). The driving mechanism (5) is used to drive the turntable (4) to rotate. A main shaft (7) is fixedly connected at the center of the upper side wall of the turntable (4). A lower grinding disc (72) is coaxially fixedly connected to the side wall of the main shaft (7). An upper grinding disc (73) is provided above the lower grinding disc (72). A grinding chamber is provided between the lower grinding disc (72) and the upper grinding disc (73). A mounting mechanism is provided on the upper grinding disc (73). The mounting mechanism mounts and fixes the upper grinding disc (73) on the main shaft (7). A power gear (8) is coaxially fixedly connected to the side wall of the main shaft (7). A plurality of planetary gears (9) are arranged in an annular array outside the wheel (8), and the plurality of planetary gears (9) are all meshed with the power gear (8) and the fixed gear (3), and the planetary gears (9) and the power gear (8) are both arranged inside the grinding chamber. The planetary gears (9) are provided with a plurality of placement grooves, and a workpiece body (91) is arranged inside the placement grooves. The two ends of the workpiece body (91) are respectively in contact with the opposite sides of the lower grinding disc (72) and the upper grinding disc (73). When the main shaft (7) drives the power gear (8), the lower grinding disc (72) and the upper grinding disc (73) to rotate, the planetary gears (9) drive the workpiece body (91) to perform a circular motion around the main shaft (7), and at the same time, the planetary gears (9) themselves drive the workpiece body (91) to rotate in a direction opposite to the rotation direction of the main shaft (7). A chip removal mechanism (6) is provided at the bottom of the turntable (4).

2. The double-sided grinding machine according to claim 1, wherein: The driving mechanism (5) comprises a driven gear (51) coaxially fixedly connected to the inner wall of the turntable (4); a driving gear (53) is meshedly connected to the interior of the driven gear (51); a servo motor (52) for driving the driving gear (53) to rotate is provided on the lower side of the driving gear (53); and the servo motor (52) is mounted on the workbench (1).

3. The double-sided grinding machine according to claim 1, wherein: The mounting mechanism comprises an upper pressure plate (75) arranged on the upper surface of the upper grinding plate (73); an assembly plate (76) is arranged at the center of the upper surface of the upper pressure plate (75); a mounting bolt (77) is fixedly connected at the center of the assembly plate (76); the lower end of the mounting bolt (77) passes through the upper pressure plate (75) and is threadedly connected to the main shaft (7).

4. The double-sided grinding machine according to claim 3, wherein: The upper pressure plate (75) is threadedly connected to a plurality of adjusting bolts (78) in an annular array, and the lower ends of the adjusting bolts (78) extend to a position between the upper pressure plate (75) and the upper grinding plate (73). The lower grinding plate (72) is fixedly arranged on the upper surface of the turntable (4).

5. The double-sided grinding machine according to claim 1, wherein: There is a gap between the inner wall of the fixed gear (3) and the lower grinding disc (72), and a retaining ring (21) is fixedly connected to the inner wall of the sleeve (2), and the circumferential inner wall of the retaining ring (21) is in close contact with the circumferential outer wall of the turntable (4), and the retaining ring (21) is arranged below the lower grinding disc (72). Two external air ducts (41) are symmetrically opened on the side wall of the turntable (4), and an internal air duct (71) is opened inside the main shaft (7), and the internal air duct (71) is a T-shaped structure. The opposite ends of the internal air duct (71) are respectively connected to the two external air ducts (41), and the lower end of the main shaft (7) passes through the top of the workbench (1) and extends downward.

6. The double-sided grinding machine according to claim 1, wherein: The interior of the workbench (1) is fixedly connected to a partition (11), and the chip removal mechanism (6) includes a dust collector (61) fixedly mounted on the upper surface of the partition (11). The top of the dust collector (61) is fixedly connected to a hard air duct (62), and the upper end of the hard air duct (62) is fixedly connected to a connecting flange (63). The connecting flange (63) is rotatably arranged at the lower end of the main shaft (7), and the connecting flange (63) connects the inner air duct (71) with the interior of the hard air duct (62).

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