Center hole and outer circle turning clamp

Abstract

The utility model discloses a clamp for turning a central hole and an outer circle, which belongs to the technical field of turning clamping tools, and is provided with a clamp main body of which the bottom end is fixedly connected with a vertical lathe main shaft, and pressing rods which can vertically stretch out and draw back to provide downward pressing force to press a workpiece are distributed in the circumferential direction of the clamp main body, the top of the clamp body can be arranged in an inner cavity of the workpiece, a plurality of anti-vibration blocks capable of swinging around a horizontal shaft are evenly distributed on the outer wall of the clamp body in the circumferential direction so that the clamp body can rotate along with a spindle of the vertical lathe, and the tail ends of the anti-vibration blocks abut against the inner wall of the workpiece to tension the workpiece under the action of inertia force. The frequency changing function is achieved, the cutter vibration phenomenon in the turning process is eliminated, and the frequency changing device has the advantages of being reliable in clamping, accurate in positioning and beneficial to improving the machining quality of workpieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to turning processing clamping frock technical field especially relates to a car center hole and external circle clamp. BACKGROUND

[0002] At present, in the production process of the wheel, due to the thin thickness of the wheel plate, the strength is not enough, and the deformation vibration, resonance and other phenomena will occur in the turning process, the vibration tool phenomenon occurs, the tool mark of the turning surface is disordered, the turning surface when turning the wheel outer circle is not ideal, uneven phenomenon will occur, and the processing quality is affected.

[0003] Therefore, in view of the above problems, the utility model provides a kind of car center hole and external circle clamp that can improve the processing quality of wheel. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of car center hole and external circle clamp, to solve the vibration tool phenomenon that will occur in the processing process, the tool mark of the turning surface is disordered, to overcome the defects of prior art, cause the low problem of workpiece processing quality.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model discloses a kind of car center hole and external circle clamp, comprising:

[0007] The bottom end is fixedly connected with the clamp main body of vertical lathe main shaft, and a plurality of compression rods capable of providing downward compression force to compress the workpiece are arranged circumferentially on the clamp main body:

[0008] Among them, the clamp main body top can be placed in the workpiece inner cavity, and a plurality of shock-absorbing blocks capable of oscillating around the horizontal shaft are uniformly distributed on the outer wall of the clamp main body, so that the clamp main body follows the rotation of the vertical lathe main shaft, and the ends of the plurality of shock-absorbing blocks abut against the inner wall of the workpiece under the action of inertial force to expand the workpiece.

[0009] Further, an axle hole is formed in the top of the shock-absorbing block, the bottom end of the shock-absorbing block has an extension section extending towards the inner wall of the workpiece, and a convex arc surface is formed at the end of the extension section.

[0010] Further, the clamp main body is configured as a cylindrical structure, and the outer wall of the clamp main body is uniformly distributed with a connecting seat, and the horizontal shaft is installed on the connecting seat.

[0011] Further, the clamp main body is configured as a cylindrical structure, and the outer wall of the clamp main body is uniformly distributed with a connecting seat, and the horizontal shaft is installed on the connecting seat.

[0012] Further, the radial positioning ring for contacting the fillet arc surface of the inner radial bottom edge of the workpiece is coaxial with the main shaft of the vertical lathe, a telescopic rod is fixedly connected to the lower part of the radial positioning ring, the telescopic rod is slidably connected with the clamp body, the telescopic rod is sleeved with a reset spring for driving the telescopic rod to reset.

[0013] Further, a bottom plate is fixedly connected to the lower part of the clamp body, and the bottom plate is fixedly connected with the main shaft of the vertical lathe.

[0014] Further, an oil cylinder fixedly connected in the main shaft of the vertical lathe is further provided, an oil cylinder rod of the oil cylinder is connected with a tensioning screw rod for slidably connecting with the clamp body, a tensioning disc is fixedly connected to the tensioning screw rod, and a plurality of the pressing rods are circumferentially fixedly connected to the tensioning disc.

[0015] In the above technical solution, the lathe center hole and the outer circle clamp have the following beneficial effects:

[0016] The clamp body is designed to press the workpiece from above by the tensioning rod, so that the workpiece is fixedly connected with the clamp body and rotates with the main shaft of the vertical lathe, a plurality of shockproof blocks are circumferentially and uniformly distributed on the outer wall of the clamp body, in a free state, the shockproof blocks vertically downward by their own weight, facilitating the workpiece to be loaded and unloaded, when the clamp body rotates with the workpiece, the plurality of shockproof blocks expand outward due to inertia, so that the shockproof blocks contact the inner wall of the workpiece, the frequency is changed, the tool is not vibrated during turning, and the workpiece machining quality is improved.

[0017] In addition, the radial positioning ring capable of ascending and descending is arranged on the clamp body, the workpiece is radially positioned, the coaxiality of the center hole and the outer circle after turning is ensured, and the positioning precision is high. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the lathe center hole and the outer circle clamp disclosed by the present application;

[0020] Figure 2 is a schematic diagram of the shockproof block structure of the lathe center hole and the outer circle clamp disclosed by the present application.

[0021] MARKED FOR EXPLANATION:

[0022] 1, clamp body; 2, compression rod; 3, shock block; 301, shaft hole; 302, extension section; 4, pull plate; 5, tensioning screw; 6, connecting seat; 7, axial support block; 8, radial positioning ring; 9, telescopic rod; 10, return spring; 11, bottom plate; 12, workpiece. DETAILED DESCRIPTION

[0023] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0024] Referring to Figure 1 As shown in the figure;

[0025] The utility model center hole and round clamp of lathe, include: clamp body 1;

[0026] The clamp body 1 bottom end is fixed with the vertical lathe main shaft, and the clamp body 1 is circumferentially provided with multiple compression rods 2 that can vertically extend and retract to provide downward compression force to compress the workpiece 12, that is, the workpiece 12 is compressed from above by the tensioning rod, so that the workpiece 12 is fixedly connected with the vertical lathe main shaft and rotates with it under the driving of the vertical lathe main shaft:

[0027] Among them, the top of the clamp body 1 can be placed in the inner cavity of the workpiece 12, and the outer wall of the clamp body 1 is circumferentially uniformly distributed with multiple shock blocks 3 that can swing around the horizontal shaft, so that when the clamp body 1 rotates with the vertical lathe main shaft, the multiple shock blocks 3 are abutted and inflated at the end with the inner wall of the workpiece 12 under the action of inertial force, so as to eliminate the vibration of the workpiece 12 and avoid the phenomenon of vibration cutting, thereby providing the turning quality of the workpiece 12.

[0028] Preferably, the shock block 3 top is provided with a shaft hole 301, and when assembled, the horizontal shaft fixedly connected with the clamp body 1 is rotatably connected through the shaft hole 301, and the bottom end of the shock block 3 has an extension section 302 extending towards the inner wall of the workpiece 12, and the end of the extension section 302 is formed with a convex arc surface, so as to ensure that when the workpiece 12 is clamped and the clamp body 1 is rotated by the vertical lathe main shaft, the shock block 3 can swing towards the workpiece 12 under the action of centrifugal force and be attached to the inner wall of the workpiece 12 through the arc surface; when assembled, the shock block 3 is installed, and in a free state, the multiple shock blocks 3 extension sections 302 are away from the workpiece 12 and do not contact the workpiece 12 by gravity, facilitating the workpiece 12 up and down, when the vertical lathe main shaft drives the clamp body 1 and the workpiece 12 to rotate, the shock block 3 is contacted with the workpiece 12 through the extension section 302 arc surface due to inertia, realizing the function of changing frequency, so as to avoid vibration cutting during turning;

[0029] Preferably, the clamp body 1 is configured as a cylindrical structure, and the clamp body 1 is uniformly distributed with the connecting seat 6 on the outer wall in the circumferential direction, and the horizontal shaft is installed on the connecting seat 6. Specifically, one end of the connecting seat 6 is detachably fixedly connected with the clamp body 1 through bolts, and the other end is provided with the horizontal shaft, thereby connecting the shockproof block 3, so that the shockproof block 3 can swing on the plumb plane.

[0030] Preferably, the clamp body 1 is configured as a cylindrical structure, and the clamp body 1 is uniformly distributed with the connecting seat 6 on the outer wall in the circumferential direction, and the horizontal shaft is installed on the connecting seat 6. Specifically, one end of the connecting seat 6 is detachably fixedly connected with the clamp body 1 through bolts, and the other end is provided with the horizontal shaft, thereby connecting the shockproof block 3, so that the shockproof block 3 can swing on the plumb plane.

[0031] Preferably, the clamp further comprises a radial positioning ring 8 for contacting the fillet arc surface of the inner radial bottom edge of the workpiece 12, and the radial positioning ring 8 is coaxial with the vertical lathe main shaft. The radial positioning ring 8 radially positions the workpiece 12, and ensures that the center hole of the workpiece 12 is coaxial with the outer circle, and satisfies the coaxiality requirement of the center hole and the outer circle ≤0.4mm. Compared with the traditional bolt hole positioning, the radial positioning ring 8 is more accurate in positioning the fillet of the inner radial bottom edge of the wheel. The radial positioning ring 8 is fixedly connected with the telescopic rod 9 at the lower part, and the telescopic rod 9 is slidably connected with the clamp body 1 through the telescopic rod 9. The telescopic rod 9 is sleeved with a return spring 10 for driving the telescopic rod 9 to return. Specifically, the return spring 10 is a compression spring, one end of the return spring 10 abuts against the bottom plate 11, and the other end abuts against the shoulder of the telescopic rod 9. The return spring 10 extends to drive the telescopic rod 9 to return. In the working state, the tension rod automatically pulls down to press the workpiece 12, and the radial positioning ring 8 moves downward under the action of the tension rod pulling force, so that the inner radial bottom of the workpiece 12 is tightly attached to the axial positioning support block of the workpiece 12, thereby ensuring reliable clamping and accurate positioning.

[0032] Preferably, the clamp body 1 is fixedly connected with the bottom plate 11 at the lower part, and the bottom plate 11 is fixedly connected with the vertical lathe main shaft. Specifically, the bottom plate 11 is a transition connecting plate, the upper part of the bottom plate 11 is detachably fixedly connected with the clamp body 1 through bolts, and the lower part of the bottom plate 11 is detachably fixedly connected with the vertical lathe main shaft through bolts.

[0033] Preferably, the clamp further comprises an oil cylinder fixedly connected in the vertical lathe main shaft, and the oil cylinder rod of the oil cylinder is connected with the tension screw 5 for slidably connecting with the clamp body 1. The tension screw 5 is fixedly connected with the pull plate 4, and the pull plate 4 is circumferentially fixedly connected with a plurality of pressing rods 2. In the working state, the oil cylinder provides downward pulling force for the tension screw 5, the tension screw 5 drives the pull plate 4 to displace downward, the pull plate 4 provides downward pulling force for the tension rod, the top end of the tension rod is provided with a pressing block, the workpiece 12 is pressed by the pressing block, and the workpiece 12 is fixedly connected with the clamp body 1.

[0034] In the above technical scheme, the vehicle center hole and the outer circle clamp provided by the utility model realize radial positioning through the contact between the radial positioning ring 8 and the fillet of the inner radial bottom edge of the workpiece 12, the workpiece 12 is automatically pulled and compressed by the tension rod 2 under the driving of the oil cylinder, the radial positioning ring 8 moves downward under the action of the tension of the tension rod 2, and the inner radial bottom of the workpiece 12 is tightly attached to the axial positioning support block 7 of the workpiece 12, so that the clamping is reliable and the positioning is accurate;

[0035] Secondly, the 5 groups of swingable shockproof blocks 3 are rotationally connected to the outer wall of the clamp body 1 through horizontal shafts 5, in a free state, the shockproof blocks 3 vertically downward by their own weight, facilitating the feeding of the upper and lower workpieces 12. When the vertical lathe main shaft drives the rotation of the clamp body 1 and the workpiece 12, the shockproof blocks 3 contact the inner wall of the workpiece 12 due to inertia, realizing the function of changing the frequency, thereby eliminating the phenomenon of tool vibration during turning.

[0036] The above only describes some exemplary embodiments of the utility model by way of illustration, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without deviating from the spirit and scope of the utility model. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection claimed by the utility model.

Claims

1. A center hole and outer diameter fixture for a machine, including: The clamp body (1), whose bottom end is fixedly connected to the main shaft of the vertical lathe, is provided with a plurality of clamping rods (2) arranged circumferentially, which can vertically extend and retract to provide downward clamping force to clamp the workpiece (12), characterized in that: The top of the fixture body (1) can be placed in the inner cavity of the workpiece (12). The outer wall of the fixture body (1) is evenly distributed with a plurality of anti-vibration blocks (3) that can swing around the horizontal axis so that the fixture body (1) rotates with the vertical car spindle. Under the action of inertial force, the ends of the plurality of anti-vibration blocks (3) abut against the inner wall of the workpiece (12) to tighten the workpiece (12).

2. The car center hole and outer circle clamp according to claim 1, characterized in that; The shock absorber (3) has a shaft hole (301) at the top and an extension section (302) extending toward the inner wall of the workpiece (12) at the bottom. The end of the extension section (302) has a convex arc surface.

3. The center hole and outer diameter clamp as described in claim 1, Its characteristics are: The fixture body (1) is constructed as a cylindrical structure. Connecting seats (6) are evenly distributed around the outer wall of the fixture body (1), and the horizontal shaft is installed on the connecting seats (6).

4. The center hole and outer circle clamp according to claim 1, characterized in that; The upper surface of the fixture body (1) is provided with an axial support block (7) for supporting the workpiece (12), wherein the clamping rod (2) passes through the axial support block (7).

5. The center hole and outer circular clamp according to claim 1, characterized in that... ； A radial positioning ring (8) is used to contact the rounded arc surface of the inner bottom edge of the workpiece (12). The radial positioning ring (8) is coaxial with the main shaft of the vertical car. A telescopic rod (9) is fixedly connected to the lower part of the radial positioning ring (8). The telescopic rod (9) is slidably connected to the fixture body (1). A return spring (10) is fitted on the telescopic rod (9) to drive the telescopic rod (9) to return to its original position.

6. The center hole and outer diameter clamp according to any one of claims 1-5, Its characteristics are: The lower part of the fixture body (1) is fixedly connected to a base plate (11), and the base plate (11) is fixedly connected to the main shaft of the vertical car.

7. The center hole and outer circular clamping fixture for a vehicle according to any one of claims 1-5, characterized in that... ； It also includes a hydraulic cylinder fixed in the main shaft of the vertical car, the cylinder rod of the hydraulic cylinder being connected to a tensioning screw (5) for sliding connection with the clamp body (1), a pull plate (4) fixedly connected to the tensioning screw (5), and a plurality of clamping rods (2) circumferentially fixed to the pull plate (4).

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