Centerless cylindrical grinding handheld clamp

Abstract

The utility model provides a centerless cylindrical grinding handheld clamp, and relates to the technical field of grinding devices. Comprising a handheld clamp which is suitable for being placed above a rotating millstone to be matched with the millstone to grind the arc surface of a cylindrical workpiece; wherein the handheld clamp comprises a handheld frame and two guide wheels installed on the handheld frame, a synchronous belt device and a driving device are arranged between the two guide wheels to drive the guide wheels to rotate synchronously, and a clamping space suitable for containing a workpiece is formed between the two guide wheels; the driving device is suitable for driving the guide wheel to rotate synchronously so as to drive the workpiece to rotate and enable the protruding surface of the workpiece to make contact with the rotating grinding disc for grinding. According to the scheme, the convenience of grinding the cylindrical workpiece can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a centerless cylindrical grinding hand-held fixture. Background Art

[0002] Currently, the commonly used tool for grinding cylindrical shapes is the centerless cylindrical grinder. The centerless cylindrical grinder has high precision and a high degree of automation, but it is expensive, requires high operator skills and has high maintenance costs. It is suitable for occasions with high precision requirements and large-scale production; however, the centerless cylindrical grinder is not well suited for some production occasions such as parts finishing, non-standard workpiece processing, low-cost small batches, and on-site operations. Utility Model Content

[0003] The utility model discloses a centerless external cylindrical grinding hand-held fixture, aiming to improve the problem of large volume of the existing centerless external cylindrical grinding machine.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a centerless external cylindrical grinding hand-held fixture, comprising: a hand-held fixture, which is suitable for being placed above a rotating grinding disc and cooperating with the grinding disc to grind the arc surface of a cylindrical workpiece; wherein the hand-held fixture comprises a hand-held frame and two guide wheels mounted on the hand-held frame, a synchronous belt device and a driving device are arranged between the two guide wheels to drive the guide wheels to rotate synchronously, and a clamping space suitable for placing the workpiece is formed between the two guide wheels; the driving device is suitable for driving the guide wheels to rotate synchronously, so as to drive the workpiece to rotate and make the raised surface on it contact with the rotating grinding disc for grinding.

[0006] Furthermore, circular baffles are provided at both ends of each guide wheel, and arc-shaped holes are symmetrically provided on the circular baffles at positions close to the clamping space; two driven wheels parallel to the guide wheels are symmetrically provided on both sides of the upper and lower ends of the clamping space, wherein both ends of the driven wheel at the lower end are rotatably mounted on the circular baffles through a long axis, and both ends of the driven wheel at the upper end are movably mounted in the arc-shaped holes through a long axis to accommodate workpieces of different diameters.

[0007] Furthermore, a tension spring is arranged between the two long shafts at the upper end to achieve pre-tightening between the two driven wheels at the upper end.

[0008] Furthermore, one of the baffles located at the same end of the two guide wheels is provided with an arc-shaped notch.

[0009] Furthermore, four driven wheels are provided, and the four driven wheels and the two guide wheels constitute the clamping space to clamp the workpiece.

[0010] Furthermore, the driving device is a servo motor, and the servo motor is suitable for controlling the rotation speed of the guide wheel so that its rotation speed is lower than the rotation speed of the grinding disc.

[0011] Furthermore, the synchronous belt device includes a synchronous pulley coaxially connected to the guide wheel, and a synchronous belt connected to the synchronous pulley, and the driving device is provided on the synchronous pulley to drive the two guide wheels to rotate synchronously.

[0012] Furthermore, the guide wheel is made of polyethylene.

[0013] Furthermore, the driven wheel is made of polyurethane.

[0014] Beneficial effects:

[0015] The utility model provides two guide wheels to cooperate with the grinding disc for differential grinding, which is suitable for grinding the outer circle of workpieces with multiple diameter ranges. During the working process, the workpiece is not subject to mechanical constraints, does not require a center point and a fixing device, has the characteristics of high efficiency, can continuously grind the workpiece, and improves productivity. The handheld clamp of this solution is easy to carry and easy to operate. It only needs to place the clamp on the workpiece, apply a downward force, and start the servo motor on the clamp to drive the workpiece to rotate at a linear speed different from the contact point with the grinding disc, so as to achieve the grinding of the workpiece, which is easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a general assembly diagram of a centerless cylindrical grinding hand-held fixture according to an embodiment of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of a centerless cylindrical grinding hand-held fixture according to an embodiment of the utility model;

[0018] Figure 3 A side view of a centerless cylindrical grinding hand-held fixture according to an embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of a clamping structure of a centerless cylindrical grinding hand-held fixture according to an embodiment of the utility model;

[0020] Icons: handheld frame 1, guide wheel 2, baffle 3, arc-shaped hole groove 301, ordinary bearing 4, servo motor 5, synchronous pulley 6, tension spring 7, long shaft 8, driven wheel 9, synchronous belt 10, bearing seat 11, grinding disc 12, thrust roller bearing 13, main shaft 14. DETAILED DESCRIPTION

[0021] Combination Figures 1 to 4As shown, this embodiment provides a centerless external cylindrical grinding hand-held fixture, including: a hand-held fixture, which is suitable for being placed above a rotating grinding disc 12 and cooperating with the grinding disc 12 to grind the arc surface of a cylindrical workpiece; wherein, the hand-held fixture includes a hand-held frame 1 and two guide wheels 2 installed on the hand-held frame 1, a synchronous belt 10 device and a driving device are arranged between the two guide wheels 2 to drive the guide wheels 2 to rotate synchronously, and a clamping space suitable for placing the workpiece is formed between the two guide wheels 2; the driving device is suitable for driving the guide wheel 2 to have the same rotation direction as the grinding disc 12, and the rotation speed of the guide wheel 2 is lower than the rotation speed of the grinding disc 12 to form a rotation speed difference, so that the raised surface on the workpiece is ground when it contacts the grinding disc 12.

[0022] Continue to combine Figures 1 to 4 As shown, in this embodiment, the shape of the handheld frame 1 is not specifically limited. There are four driven wheels 9, and the four driven wheels 9 and the two guide wheels 2 constitute the clamping space to clamp the workpiece. A circular baffle 3 is provided at both ends of each guide wheel 2, and the circular baffle 3 is symmetrically provided with an arc-shaped hole groove 301 near the clamping space; two driven wheels 9 parallel to the guide wheel 2 are symmetrically provided on both sides of the upper and lower ends of the clamping space, wherein the two ends of the driven wheel 9 at the lower end are rotatably mounted on the circular baffle 3 through the long shaft 8, and the two ends of the driven wheel 9 at the upper end are movably mounted in the arc-shaped hole groove 301 through the long shaft 8 to adapt to workpieces of different diameters. When clamping, the workpiece contacts the four driven wheels 9 and the two guide wheels 2, confining the workpiece in the clamping space, and the workpiece is driven to rotate by the rotation of the guide wheel 2, and grinding is achieved by the high-speed rotation of the bottom grinding disc 12. The handheld fixture further comprises a bearing seat 11 for mounting a thrust roller bearing 13 and a spindle 14. The servo motor 5 is mounted on the handheld frame 1 and connected to the guide wheel 2 through the spindle 14, and the guide wheel 2 is connected to the spindle 14 through the thrust roller bearing 13.

[0023] The guide wheel 2 is made of polyethylene; the driven wheel 9 is made of polyurethane; the driving device is a servo motor 5, and the servo motor 5 is suitable for controlling the rotation speed and direction of the guide wheel 2 so that its rotation speed is lower than the rotation speed of the grinding disc 12.

[0024] Continue to combine Figure 1 , 2 and Figure 4As shown, the circular baffle 3 has an arc-shaped hole groove 301 cut out along the contour line, and the two long shafts 8 on the upper side that cooperate with the driven wheel 9 pass through the arc-shaped hole groove 301; the driven wheel 9 cooperates with the long shaft 8 through a common bearing 4, and the ends of the two long shafts 8 on the upper side are connected by a tension spring 7 to realize the movement of the driven wheel 9 along the arc-shaped hole groove 301, thereby realizing the clamping of the driven wheel 9 on workpieces of different diameters, and realizing pre-tightening between the two driven wheels 9 at the upper end. The synchronous belt 10 device includes a synchronous pulley 6 coaxially connected to the guide wheel 2, and a synchronous belt 10 connected to the synchronous pulley 6. The synchronous pulley 6 is provided with the driving device to drive the two guide wheels 2 to rotate synchronously. Specifically, the synchronous pulley 6 is connected to the guide wheel 2 through the main shaft 14 to achieve synchronous rotation of the guide wheel 2 and the synchronous pulley 6, and finally the guide wheel 2 drives the workpiece to rotate on the grinding wheel 12; the servo motor 5 is connected to the synchronous pulley 6 and the guide wheel 2 through the main shaft 14. By adjusting the rotation speed of the servo motor 5, the speed of the guide wheel 2 is controlled, so that the rotation speed of the guide wheel 2 is different from the rotation speed of the grinding wheel 12, thereby achieving grinding of the workpiece.

[0025] Continue to combine Figure 1 and Figure 4 As shown, in one embodiment, one of the baffles 3 located at the same end of the two guide wheels 2 is provided with an arc-shaped notch, and the contour of the other baffle 3 is a complete circle. The complete circular baffle 3 can prevent the workpiece from hitting the synchronous belt 10 and causing damage.

[0026] During operation, it is only necessary to place the hand-held fixture on the workpiece, apply a downward force, and start the servo motor 5 on the hand-held fixture, so that the workpiece can be driven to rotate at a linear speed different from the contact point with the grinding disc 12, and the workpiece can be ground. Here, the grinding disc 12 is driven to rotate by other driving mechanisms. The workpiece is clamped and rounded between the two guide wheels 2 and the lower grinding disc 12. During the grinding process, the workpiece is clamped between the grinding disc 12 and the guide wheel 2 and rotates in the same direction at different speeds. The guide wheel 2 drives the workpiece to rotate at a slower speed, and the grinding disc 12 rotates at a high speed to grind the workpiece. When some raised surfaces on the workpiece contact the grinding wheel, they will be ground until they can be gradually rounded in multiple rotations to meet the grinding requirements.

[0027] The handheld clamp of the embodiment has the characteristics of high efficiency, can grind the workpiece continuously, the workpiece is not mechanically constrained during the working process, does not require a center point and a fixing device, and improves productivity. In addition, the clamp is easy to carry and easy to operate, making the handheld clamp of the embodiment easy to promote and apply.

[0028] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0029] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. A centerless cylindrical grinding handheld fixture, characterized in that: include: A handheld clamp, which is suitable for being placed above a rotating grinding disc and cooperating with the grinding disc to grind the arc surface of a cylindrical workpiece; wherein, the handheld clamp includes a handheld frame and two guide wheels mounted on the handheld frame, a synchronous belt device and a driving device are provided between the two guide wheels to drive the guide wheels to rotate synchronously, and a clamping space suitable for placing the workpiece is formed between the two guide wheels; the driving device is suitable for driving the guide wheels to rotate synchronously, so as to drive the workpiece to rotate and make the raised surface on it contact with the rotating grinding disc for grinding.

2. The centerless cylindrical grinding handheld fixture according to claim 1, characterized in that: A circular baffle is provided at both ends of each guide wheel, and the circular baffle is symmetrically provided with an arc-shaped hole groove at a position close to the clamping space; two driven wheels parallel to the guide wheel are symmetrically provided on both sides of the upper and lower ends of the clamping space, wherein the two ends of the driven wheel at the lower end are rotatably mounted on the circular baffle through the long axis, and the two ends of the driven wheel at the upper end are movably mounted in the arc-shaped hole groove through the long axis to adapt to workpieces of different diameters.

3. The centerless cylindrical grinding handheld fixture according to claim 2, characterized in that: A tension spring is provided between the two long shafts at the upper end so as to achieve pre-tightening between the two driven wheels at the upper end.

4. The centerless cylindrical grinding handheld fixture according to claim 2, characterized in that: One of the baffles located at the same end of the two guide wheels is provided with an arc-shaped notch.

5. The centerless cylindrical grinding handheld fixture according to claim 2, characterized in that: Four driven wheels are provided, and the four driven wheels and the two guide wheels form the clamping space to clamp the workpiece.

6. The centerless cylindrical grinding handheld fixture according to claim 1, characterized in that: The driving device is a servo motor, which is suitable for controlling the rotation speed of the guide wheel so that its rotation speed is lower than the rotation speed of the grinding disc.

7. The centerless cylindrical grinding handheld fixture according to claim 1, characterized in that: The synchronous belt device includes a synchronous pulley coaxially connected to the guide wheel, and a synchronous belt connected to the synchronous pulley. The synchronous pulley is provided with the driving device to drive the two guide wheels to rotate synchronously.

8. The centerless cylindrical grinding handheld fixture according to claim 1, characterized in that: The guide wheel is made of polyethylene.

9. The centerless cylindrical grinding handheld fixture according to claim 2, characterized in that: The driven wheel is made of polyurethane.

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