An annular workpiece clamping mechanism

Abstract

The application provides a ring workpiece clamping mechanism and belongs to the technical field of machining. The application solves the problems of the deformation of the workpiece caused by the clamping of the ring workpiece by the three-jaw chuck, the insufficient clamping stability of the end face of the ring workpiece by the suction cup, and the like. The application comprises a rotating disc, a clamping piece one and a clamping piece two arranged on the rotating disc. The clamping piece one comprises two clamping jaws oppositely arranged and respectively located at the inner and outer sides of the ring workpiece, and the two clamping jaws are oppositely opened or relatively closed by an adjusting mechanism. The clamping piece two comprises a positioning block and a pressing block, and the positioning block and the pressing block are respectively located at the inner and outer sides of the ring workpiece. A driving piece is further arranged on the rotating disc to push the pressing block to tightly press the ring workpiece against the positioning block. The application has the advantages that the clamping piece one and the clamping piece two jointly clamp and position the workpiece, the deformation of the ring workpiece is avoided, and high-precision machining can be realized.

Description

Technical Field

[0001] This invention belongs to the field of machining technology and relates to a ring-shaped workpiece clamping mechanism. Background Technology

[0002] In machining, we often encounter ring-shaped workpieces that require machining their inner and outer circles and end faces. A three-jaw chuck is usually used to clamp the ring-shaped workpiece. However, the jaws of the three-jaw chuck can easily deform the workpiece when clamping it.

[0003] Therefore, people began to use suction cups to adsorb the end face of ring-shaped workpieces for processing. However, the adsorption area of ​​suction cups for many ring-shaped workpieces is insufficient. Due to the small contact area between the suction cup and the end face of the ring-shaped workpiece, the force-bearing area is also relatively small, resulting in insufficient clamping stability of the ring-shaped workpiece. The ring-shaped workpiece is easy to move during processing, thus affecting the processing quality. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing ring-shaped workpiece processing by proposing a mechanism for clamping ring-shaped workpieces securely and preventing deformation.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A ring-shaped workpiece clamping mechanism is installed on a machine tool. It is characterized in that it includes a rotary disk fixed to the machine tool spindle, a clamping member one and a clamping member two disposed on the rotary disk, the rotary disk having a mounting and positioning surface perpendicular to the spindle axis, and the clamping member one and the clamping member two being mounted on the mounting and positioning surface.

[0007] The clamping component includes a floating caliper, which has two jaws arranged opposite each other and located on the inner and outer sides of the annular workpiece, respectively. An adjustment mechanism can be used to open the two jaws in opposite directions or bring them closer together. A guide groove is provided on the rotating disk, which extends radially along the rotating disk. A guide block is provided at the lower part of the floating caliper. The guide block is embedded in the guide groove and moves back and forth along the guide groove. A locking mechanism is also provided on the rotating disk to lock and fix the guide block on the rotating disk.

[0008] The second clamping component includes a positioning block and a pressing block. The positioning block is fixedly connected to the rotating disk. The positioning block and the pressing block are located on the inner and outer sides of the annular workpiece, respectively. The rotating disk is also provided with a driving component for pushing the pressing block to press the annular workpiece against the positioning block.

[0009] In the above-mentioned annular workpiece clamping mechanism, the rotating disk is provided with a set of clamping components II and at least two sets of clamping components I.

[0010] In the above-mentioned annular workpiece clamping mechanism, the rotating disk is provided with two sets of clamping components II and at least one set of clamping components I.

[0011] In the above-mentioned annular workpiece clamping mechanism, the cross-sectional shape of the guide groove is an inverted T-shape.

[0012] In the aforementioned annular workpiece clamping mechanism, the locking mechanism includes a hollow tube with an elliptical cross-sectional shape. The rotating disk has a mounting hole communicating with the guide groove. The hollow tube is movably disposed in the mounting hole. By rotating the hollow tube, the elliptical hollow tube is rotated along its longest axis to be parallel to the mounting and positioning surface, so that one end of the longest axis of the hollow tube is pressed against the clamping member. The hollow tube is compressed to elastic deformation, so that the clamping member is pressed and locked in the guide groove by the hollow tube.

[0013] In the above-mentioned ring workpiece clamping mechanism, the clamping component is an integral structure with two jaws fixed relative to each other, and the distance between the two jaws is adapted to the ring width of the ring workpiece.

[0014] In the above-mentioned ring workpiece clamping mechanism, the clamping component is a split structure, with two jaws consisting of a fixed jaw and a movable jaw. The movable jaw is detachably mounted on the fixed jaw. The movable jaw of different thicknesses can be replaced according to the ring width of different ring workpieces so that the distance between the fixed jaw and the movable jaw is adapted to the ring width of the ring workpiece.

[0015] In the above-mentioned ring workpiece clamping mechanism, the adjusting mechanism includes a screw that passes through one of the jaws and is threadedly connected to it; the end of the screw abuts against the other jaw, and rotating the screw pushes the jaw outward; the ring workpiece is inserted into the two jaws, and the screw is rotated in the opposite direction to reset the jaws and clamp the ring workpiece.

[0016] In the above-mentioned ring workpiece clamping mechanism, the adjusting mechanism includes a screw, which is threadedly connected to the clamping member. The end of the screw is rotatably mounted on one of the jaws. When the screw is rotated, the end of the screw pulls the jaw outward to open it outward. The ring workpiece is inserted into the two jaws, and the screw is rotated in the opposite direction to reset the jaws and clamp the ring workpiece.

[0017] In the above-mentioned ring workpiece clamping mechanism, the adjusting mechanism includes a screw, which is threadedly connected to the clamping member. The end of the screw abuts against one of the jaws. The ring workpiece is inserted into the two jaws, and the screw is rotated to push the jaws inward to clamp the ring workpiece.

[0018] In the above-mentioned ring workpiece clamping mechanism, the adjusting mechanism includes a wedge with an inclined surface. The two ends of the inclined surface are the small end and the large end of the wedge, respectively. The small end of the wedge is inserted between two jaws until the inclined surface abuts against one of the jaws. The jaw is then pushed along the inclined surface to open it up, and the ring workpiece is inserted into the two jaws. The wedge is then removed to reset the jaws and clamp the ring workpiece.

[0019] In the above-mentioned ring workpiece clamping mechanism, the adjusting mechanism includes a cam. The cam is placed between two jaws, and the cam is rotated so that the outer wheel surface of the cam abuts against the jaws. The cam is rotated further and the two jaws are pushed open along the outer wheel surface of the cam to insert the ring workpiece into the two jaws. The cam is rotated in the opposite direction to reset the jaws and clamp the ring workpiece.

[0020] In the above-mentioned ring-shaped workpiece clamping mechanism, the rotating disk is made of magnetic material, and the rotating disk can magnetically fix the ring-shaped workpiece to the mounting and positioning surface.

[0021] In the above-mentioned ring workpiece clamping mechanism, the driving component includes a mounting block, a guide rod, a first wedge block, and a second wedge block. The mounting block is fixed on the rotating disk, the guide rod is movably mounted on the mounting block, the first wedge block is fixed on the rotating disk, the second wedge block is slidably mounted on the first wedge block, one end of the guide rod is fixedly connected to the second wedge block, and a pressure block is fixed on the second wedge block. A spring is sleeved on the guide rod, which is used to push the second wedge block to translate relative to the first wedge block, so that the pressure block presses against the ring workpiece.

[0022] Compared with the prior art, the present invention provides clamping component one and clamping component two on the left and right sides of the annular workpiece respectively. The two claws on clamping component one clamp and fix the annular workpiece, and clamping component two clamps and fixes the workpiece through two positioning blocks and pressure blocks located on the inner and outer sides of the workpiece respectively. The clamping component one and clamping component two work together to clamp and position the workpiece, avoid deformation of the annular workpiece, and achieve high-precision processing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the combination of clamping member one and clamping member two of the present invention;

[0024] Figure 2 This is another schematic diagram of a combination of clamping member one and clamping member two of the present invention;

[0025] Figure 3 This is a top view of the clamping mechanism of the present invention;

[0026] Figure 4 This is a side view of the clamping mechanism of the present invention;

[0027] Figure 5This is a schematic diagram of the adjustment mechanism in Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of the adjustment mechanism in Embodiment 2 of the present invention;

[0029] Figure 7 This is a schematic diagram of the adjustment mechanism in Embodiment 3 of the present invention;

[0030] Figure 8 This is a schematic diagram of a split clamping component of the present invention.

[0031] In the diagram, 1. Spindle; 2. Rotary disk; 3. Mounting and positioning surface; 4. Floating caliper; 5. Ring-shaped workpiece; 6. Fixed jaw; 7. Movable jaw; 8. Positioning block; 9. Pressure block; 10. Guide groove; 11. Hollow tube; 12. Mounting hole; 13. Mounting block; 14. Guide rod; 15. Wedge block one; 16. Wedge block two; 17. Spring; 18. Screw; 19. Guide block. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] Example 1

[0034] like Figure 1 As shown, the annular workpiece clamping mechanism of the present invention is installed on a machine tool. It includes a rotary disk 2 fixed to the machine tool spindle 1, and clamping member one and clamping member two disposed on the rotary disk 2. The rotary disk 2 has a mounting and positioning surface 3 perpendicular to the axis of the spindle 1, and clamping member one and clamping member two are mounted on the mounting and positioning surface 3. The rotary disk 2 is provided with one set of clamping member two and at least two sets of clamping member one.

[0035] The clamping component includes a floating caliper 4, which comprises two jaws positioned opposite each other and located on the inner and outer sides of the annular workpiece 5, respectively. An adjusting mechanism allows the two jaws to be either opened in opposite directions or brought closer together. There are two methods for clamping the annular workpiece 5: one is to open the two jaws in opposite directions using the adjusting mechanism, insert the annular workpiece 5 into the jaws, and then reset the jaws to clamp the annular workpiece 5; the other is to first place the annular workpiece 5 between the two jaws, and then bring the jaws closer together using the adjusting mechanism to clamp the annular workpiece 5.

[0036] like Figure 3 and Figure 4As shown, a guide groove 10 is formed on the rotating disk 2, extending radially along the rotating disk 2. A guide block 19 is provided at the lower part of the floating caliper 4. This guide block 19 is embedded in the guide groove 10 and moves back and forth along the guide groove 10. A locking mechanism is also provided on the rotating disk 2 to lock and fix the guide block 19 onto the rotating disk 2. The cross-sectional shape of the guide groove 10 is an inverted T-shape. Figure 3 As shown, the clamping component is an integral structure with two jaws fixed relative to each other. The distance between the two jaws is adapted to the ring width of the ring workpiece 5.

[0037] like Figure 4 As shown, the locking mechanism includes a hollow tube 11 with an elliptical cross-section. The rotating disk 2 has a mounting hole 12 communicating with the guide groove 10. The hollow tube 11 is movably disposed in the mounting hole 12. By rotating the hollow tube 11, the elliptical hollow tube 11 is rotated along its longest axis to be parallel to the mounting and positioning surface 3, so that one end of the longest axis of the hollow tube 11 is pressed against the clamping member 1. The hollow tube 11 is compressed to elastic deformation, so that the clamping member 1 is pressed and locked in the guide groove 10 by the hollow tube 11.

[0038] like Figure 1 As shown, the clamping component two includes a positioning block 8 and a pressing block 9. The positioning block 8 is fixedly connected to the rotating disk 2. The positioning block 8 and the pressing block 9 are located on the inner and outer sides of the annular workpiece 5, respectively. The rotating disk 2 is also provided with a driving component for pushing the annular workpiece 5 to press against the positioning block 8.

[0039] The driving component includes a mounting block 13, a guide rod 14, a first wedge block 15, and a second wedge block 16. The mounting block 13 is fixed on the rotating disk 2. The guide rod 14 is movably mounted on the mounting block 13. The first wedge block 15 is fixed on the rotating disk 2. The second wedge block 16 is slidably mounted on the first wedge block 15. One end of the guide rod 14 is fixedly connected to the second wedge block 16. The pressure block 9 is fixed on the second wedge block 16. A spring 17 is sleeved on the guide rod 14. The spring 17 is used to push the second wedge block 16 to translate relative to the first wedge block 15 so that the pressure block 9 presses against the annular workpiece 5.

[0040] like Figure 5 As shown, the adjusting mechanism includes a screw 18, which passes through one of the jaws and is threadedly connected to it; the end of the screw 18 abuts against the other jaw, and rotating the screw 18 pushes the jaw outward; the annular workpiece 5 is inserted into the two jaws, and the screw 18 is rotated in the opposite direction to reset the jaws and clamp the annular workpiece 5.

[0041] The rotating disk 2 is made of magnetic material and can magnetically fix the ring-shaped workpiece 5 onto the mounting and positioning surface 3.

[0042] The steps for clamping the workpiece are as follows: First, place the annular workpiece 5 between the two jaws and place the annular workpiece 5 on the mounting and positioning surface 3 of the rotating disk 2. The driving component is used to push the annular workpiece 5 to press against the positioning block 8. After the floating caliper 4 clamps the annular workpiece 5, the floating caliper 4 automatically positions itself radially on the rotating disk 2. Then, the locking mechanism locks and fixes the guide block 19 on the rotating disk 2, and the clamping of the annular workpiece 5 is completed.

[0043] Example 2

[0044] like Figure 6 As shown, unlike Embodiment 1, the adjustment mechanism in this embodiment includes a screw 18, which is threadedly connected to a clamping member. The end of the screw 18 is rotatably mounted on one of the jaws. When the screw 18 is rotated, the end of the screw 18 pulls the jaw outward to open it outward. The annular workpiece 5 is inserted into the two jaws, and the screw 18 is rotated in the opposite direction to reset the jaws and clamp the annular workpiece 5.

[0045] Example 3

[0046] like Figure 7 As shown, unlike Embodiment 1, the adjustment mechanism in this embodiment includes a screw 18, which is threadedly connected to a clamping member. The end of the screw 18 abuts against one of the jaws. The annular workpiece 5 is inserted into the two jaws, and the screw 18 is rotated to push the jaws inward to clamp the annular workpiece 5.

[0047] Example 4

[0048] Unlike Embodiment 1, the adjustment mechanism described in this embodiment includes a wedge with an inclined surface. The two ends of the inclined surface are the small end and the large end of the wedge, respectively. The small end of the wedge is inserted between two jaws until the inclined surface abuts against one of the jaws. The jaw is then pushed along the inclined surface to open it up. The annular workpiece 5 is inserted into the two jaws. The wedge is then removed to reset the jaws and clamp the annular workpiece 5.

[0049] Example 5

[0050] Unlike Embodiment 1, the adjustment mechanism described in this embodiment includes a cam. The cam is placed between two jaws, and the cam is rotated so that the outer wheel surface of the cam abuts against the jaws. The cam is rotated further, and the two jaws are pushed open along the outer wheel surface of the cam to insert the annular workpiece 5 into the two jaws. The cam is rotated in the opposite direction to reset the jaws and clamp the annular workpiece 5.

[0051] Example 6

[0052] like Figure 8As shown, unlike Embodiment 1, the clamping component in this embodiment is a split structure. The two jaws are divided into a fixed jaw 6 and a movable jaw 7. The movable jaw 7 is detachably mounted on the fixed jaw 6. The movable jaw 7 of different thicknesses can be replaced according to the ring width of different annular workpieces 5 so that the distance between the fixed jaw 6 and the movable jaw 7 is adapted to the ring width of the annular workpiece 5.

[0053] Example 7

[0054] like Figure 2 As shown, unlike Embodiment 1, the rotating disk 2 in this embodiment is provided with two sets of clamping components II and at least one set of clamping components I.

[0055] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0056] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A ring-shaped workpiece clamping mechanism, installed on a machine tool, characterized in that, It includes a rotary disk (2) fixed to the machine tool spindle (1), a clamping member 1 and a clamping member 2 set on the rotary disk (2), the rotary disk (2) having a mounting positioning surface (3) perpendicular to the axis of the spindle (1), and the clamping member 1 and the clamping member 2 are mounted on the mounting positioning surface (3); The clamping component includes a floating caliper (4), which includes two jaws. The two jaws are arranged opposite each other and are located on the inner and outer sides of the annular workpiece (5). An adjustment mechanism is used to open the two jaws in opposite directions or bring them closer together. A guide groove (10) is provided on the rotating disk (2). The guide groove (10) extends radially along the rotating disk (2). A guide block (19) is provided at the lower part of the floating caliper (4). The guide block (19) is embedded in the guide groove (10) and moves back and forth along the guide groove (10). A locking mechanism is also provided on the rotating disk (2) to lock and fix the guide block (19) on the rotating disk (2). The clamping component 2 includes a positioning block (8) and a pressing block (9). The positioning block (8) is fixedly connected to the rotating disk (2). The positioning block (8) and the pressing block (9) are located on the inner and outer sides of the annular workpiece (5) respectively. The rotating disk (2) is also provided with a driving component for pushing the annular workpiece (5) to press against the positioning block (8). The locking mechanism includes a hollow tube (11) with an elliptical cross-section. The rotating disk (2) has a mounting hole (12) that communicates with the guide groove (10). The hollow tube (11) is movably disposed in the mounting hole (12). When the hollow tube (11) is rotated, the elliptical hollow tube (11) is rotated along its longest axis to be parallel to the mounting positioning surface (3), so that one end of the longest axis of the hollow tube (11) is pressed against the clamping member. The hollow tube (11) is compressed to elastic deformation, so that the clamping member is pressed and locked in the guide groove (10) by the hollow tube (11).

2. The annular workpiece clamping mechanism according to claim 1, characterized in that, The rotating disk (2) is provided with a set of clamping components II and at least two sets of clamping components I.

3. The annular workpiece clamping mechanism according to claim 1, characterized in that, The rotating disk (2) is provided with two sets of clamping components II and at least one set of clamping components I.

4. The annular workpiece clamping mechanism according to claim 1, characterized in that, The clamping component is an integral structure with two jaws fixed relative to each other. The distance between the two jaws is adapted to the ring width of the ring workpiece (5).

5. The annular workpiece clamping mechanism according to claim 1, characterized in that, The clamping component is a split structure, with two jaws consisting of a fixed jaw (6) and a movable jaw (7). The movable jaw (7) is detachably mounted on the fixed jaw (6). The movable jaw (7) of different thicknesses can be replaced according to the ring width of different annular workpieces (5) so that the distance between the fixed jaw (6) and the movable jaw (7) is adapted to the ring width of the annular workpiece (5).

6. The annular workpiece clamping mechanism according to claim 1, characterized in that, The adjustment mechanism includes a screw (18) that passes through one of the jaws and is threaded to it; the end of the screw (18) abuts against the other jaw, and when the screw (18) is rotated, the end of the screw (18) pushes the jaw outward; the annular workpiece (5) is inserted into the two jaws, and the screw (18) is rotated in the opposite direction to reset the jaws and clamp the annular workpiece (5).

7. The annular workpiece clamping mechanism according to claim 1, characterized in that, The adjustment mechanism includes a screw (18), which is threadedly connected to the clamping member. The end of the screw (18) is rotatably mounted on one of the jaws. When the screw (18) is rotated, the end of the screw (18) pulls the jaw outward to open it outward. The annular workpiece (5) is inserted into the two jaws, and the screw (18) is rotated in the opposite direction to reset the jaws and clamp the annular workpiece (5).

8. The annular workpiece clamping mechanism according to claim 1, characterized in that, The adjustment mechanism includes a screw (18), which is threadedly connected to the clamping member. The end of the screw (18) abuts against one of the jaws. The annular workpiece (5) is inserted into the two jaws, and the screw (18) is rotated to push the jaws inward to clamp the annular workpiece (5).

9. The annular workpiece clamping mechanism according to claim 1, characterized in that, The adjustment mechanism includes a wedge with an inclined surface. The two ends of the inclined surface are the small end and the large end of the wedge, respectively. The small end of the wedge is inserted between two jaws until the inclined surface abuts against one of the jaws. The jaw is then pushed along the inclined surface to open it. The annular workpiece (5) is inserted into the two jaws. The wedge is removed so that the jaws are reset and clamp the annular workpiece (5).

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