Automatic clamping device for disc-shaped cutter

Abstract

The utility model discloses an automatic clamping device for a disc-shaped cutter. The automatic clamping device comprises a table top, a positioning pull rod, a central lantern ring, a positioning pin, an elastic strip, a clamping shell, a clamping seat, a magnetic attraction device and a linear driving device. In the material waiting state, the linear driving device pushes the positioning pull rod to move forwards, so that the positioning pin retracts into the open groove of the clamping shell, due to the fact that large dimensional tolerance exists between the inner hole of the disc-shaped cutter and the outer wall of the clamping shell, positioning taking and placing of the mechanical arm can be met, and after the mechanical arm places the disc-shaped cutter, the linear driving device pulls the positioning pull rod to move backwards. The conical head pushes all the positioning pins to be exposed out of the open grooves at the same time to abut against the inner hole of the disc-shaped cutter, and the effect of positioning the center of the inner hole of the disc-shaped cutter is achieved. And meanwhile, under the magnetic attraction action of the magnetic attraction device, the disc-shaped cutter is tightly attached to the front end face of the clamping base, it is effectively guaranteed that the axis of the disc-shaped cutter coincides with the axis of the clamping device, and the clamping precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic clamping, in particular to an automatic clamping device for a disc-shaped tool. Background Art

[0002] Among the existing disc tool clamping solutions, there are methods that directly use the machining accuracy of the center axis and the matching accuracy of the inner hole of the disc tool to achieve the purpose of positioning the center axis of the tool; there are also methods that use an external expansion hydraulic tool holder to evenly expand the inner hole of the disc tool to achieve the purpose of positioning the center axis of the inner hole of the disc tool.

[0003] In order to realize automatic loading and unloading, a tool holder is manually installed on the disc tool, and then the tool holder is quickly changed to realize automatic loading and unloading to meet the unattended factory processing plan. Although this solution can achieve the purpose of automatic quick change of disc tools, it is necessary to configure a tool holder on each disc tool. For this reason, a large number of tool holders need to be purchased to match the use of the machine, resulting in high production costs and occupying more space. For this reason, it is necessary to develop an automatic clamping device for disc tools that can realize automatic installation and removal of disc tools by a robot while reducing costs. Utility Model Content

[0004] In view of the above-mentioned shortcomings, the purpose of the utility model is to provide an automatic disc tool clamping device with reasonable structural design, which can realize automatic installation and removal of disc tools by a robot under the condition of reducing costs.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0006] The tool holder is provided with a plurality of grooves which are symmetrically arranged on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin. The plurality of grooves are provided on the clamping shell and matched with the positioning pin.

[0007] As a preferred solution of the utility model, the radial cross-section of the conical head is circular or regular polygonal, which helps to provide uniform contact pressure, increase the stability of the contact between the conical head and the locating pin, make the clamping more stable, and reduce the risk of eccentricity or sliding.

[0008] As a preferred solution of the utility model, the slot is in the shape of an elongated strip, and has a good matching effect with the positioning pin.

[0009] As a preferred solution of the utility model, square protrusions are provided at the four corners of the groove, and the locating pin is provided with a locating opening matched with the square protrusion. The square protrusion and the locating opening cooperate with each other, which has a good limiting and guiding effect on the locating pin, preventing it from unnecessary movement during the clamping process.

[0010] As a preferred solution of the utility model, a through hole is provided at the upper position of the locating pin, the elastic strip passes through the through hole, and both ends are fixed on both sides of the slot, which is simple and convenient to install, simplifies the installation and maintenance of the elastic mechanism, and ensures the reliable resetting of the locating pin.

[0011] As a preferred solution of the utility model, a clamping ring is provided at the front end of the through hole, and a baffle is provided at the rear end to position the center ring therein, so as to facilitate the installation of the center ring and have a good positioning effect on the center ring, thereby improving the stability and reliability of the device and reducing the failure rate.

[0012] As a preferred solution of the utility model, a plurality of balls are distributed on the central collar, and the balls can roll to reduce the friction resistance of the positioning rod when it moves, thereby improving the operational flexibility and response speed of the clamping device.

[0013] As a preferred solution of the utility model, the front end of the locating pin is thinner and the tail end gradually thickens. The radial cross-section of the conical head is circular, and the inclined surface is provided with an arc-shaped recessed position that matches the outer contour of the conical head. The matching effect is good, which further improves the clamping reliability and the stability of the tool.

[0014] As a preferred solution of the utility model, the magnetic attraction device is a ring-shaped electromagnet, which can provide a strong adsorption force and has the advantages of fast switching and easy control.

[0015] As a preferred solution of the utility model, the linear drive device is a pneumatic cylinder, an oil cylinder or a linear motor, and a suitable drive mode can be selected according to actual needs to achieve fast and accurate clamping and releasing of the disc-shaped tool.

[0016] The beneficial effects of the utility model are as follows: the structural design of the utility model is reasonable. When the material is waiting to be processed, the linear drive device pushes the positioning rod forward, so that the positioning pin is retracted into the slot of the clamp shell. Since there is a large dimensional tolerance between the inner hole of the disc-shaped tool and the outer wall of the clamp shell, the positioning and placement of the robot can be met. After the robot places the disc-shaped tool, the linear drive device pulls the positioning rod backward, and pushes all the positioning pins through the conical head to be exposed from the slot and press against the inner hole of the disc-shaped tool at the same time, so as to achieve the function of locating the center of the inner hole of the disc-shaped tool; at the same time, when the magnetic attraction of the magnetic attraction device is in effect, the disc-shaped tool is tightly attached to the front end surface of the clamp seat, effectively ensuring that the axis of the disc-shaped tool coincides with the axis of the clamping device, and effectively improving the clamping accuracy; after the processing is completed, the robot grabs the disc-shaped tool, the magnetic attraction device is demagnetized, and the linear drive device pushes the positioning rod forward to release the disc-shaped tool, and the robot can take the disc-shaped tool away, thereby realizing the automatic installation and disassembly of the robot, which can meet the needs of factory automation processing.

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the exploded structure of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the clamping shell and the positioning pin in the utility model.

[0021] Figure 4 It is a structural schematic diagram of a positioning pull rod and a center sleeve ring in the utility model.

[0022] Figure 5 It is a structural schematic diagram of the utility model equipped with a disc-shaped cutter.

[0023] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure. DETAILED DESCRIPTION

[0024] Example: See Figure 1 and Figure 6 The utility model provides an automatic clamping device for a disc-shaped tool, which includes a table 1, a positioning rod 2, a center collar 3, a positioning pin 4, an elastic strip 5, a clamping shell 6, a clamping seat 7, a magnetic suction device 8 and a linear drive device 9.

[0025] The clamp seat 7 is fixed on the table top 1 by screws. A through hole 71 is provided on the clamp seat 7 for the positioning rod 2 to pass through. Since the table top 1 has a certain thickness, an opening 11 is also provided on the table top 1 which is opposite to the through hole 71. A retaining ring 72 is provided at the front end of the through hole 71, and the center sleeve 3 is placed into the through hole 71. Then, a baffle 73 which can position the center sleeve 3 in the through hole 71 is fixed by screws at the rear end of the through hole 71 to limit the center sleeve 3 from axial movement, thereby improving the structural stability and reliability and reducing the failure rate. Preferably, a plurality of balls 31 can be distributed on the center sleeve 3, and the balls 31 can roll arbitrarily, so that the friction resistance of the positioning rod 2 during movement can be reduced, and the operational flexibility and response speed of the clamping device can be improved.

[0026] The positioning rod 2 is movably arranged on the center collar 3, and the linear drive device 9 is arranged on the table 1 and connected to the tail end of the positioning rod 2. In this embodiment, the linear drive device 9 is preferably a cylinder, which is installed on the table 1 through a conversion plate 91. In other embodiments, a suitable driving method can be selected according to actual needs. For example, the linear drive device 9 can also be an oil cylinder or a linear motor. In order to facilitate the connection of the positioning rod 2, a connecting rod 92 can be added to the piston rod of the cylinder, and the other end of the connecting rod 92 passes through the opening 11 of the table 1 and is connected to the tail end of the positioning rod 2.

[0027] The clamp shell 6 is located at the center of the end surface of the clamp seat 7. The front end of the positioning rod 2 is located in the clamp shell 6 and is provided with a conical head 21. The clamp shell 6 is provided with a plurality of slots 61 that are symmetrically arranged to match the positioning pin 4. The positioning pin 4 is arranged in the slot 61 through an elastic strip 5 and retracts into the slot 61 under the elastic force of the elastic strip 5. Specifically, a through hole 41 is provided at the upper position of the positioning pin 4. The elastic strip 5 passes through the through hole 41, and the two ends are fixed to the two sides of the slot 61 by screws. The installation is simple and convenient, which simplifies the installation and maintenance of the elastic mechanism and ensures the reliable resetting of the positioning pin 4. The elastic strip 5 can be a strong rubber band or a metal tension spring.

[0028] The bottom surface of the locating pin 4 is provided with an inclined surface adapted to the conical head 21, and the axial backward movement of the conical head 21 can push the locating pin 4 to expose the slot 61. Preferably, the radial cross-section of the conical head 21 can be circular or regular polygonal, which helps to provide uniform contact pressure, increase the stability of the contact between the conical head 21 and the locating pin 4, make the clamping more stable, and reduce the risk of eccentricity or sliding. In this embodiment, the radial cross-section of the conical head 21 is circular, and the number of the slots 61 is four. The front end of the locating pin 4 is thin, and the tail end gradually thickens. The inclined surface is provided with an arc-shaped recessed position adapted to the outer contour of the conical head 21, which has a good matching effect, further improving the reliability of clamping and the stability of the tool. The slot 61 is in the shape of a long strip, and has a good matching effect with the locating pin 4. Preferably, square protrusions 611 are provided at the four corners of the slot 61, and the locating pin 4 is provided with a locating opening 42 matched with the square protrusion 611. The cooperation between the square protrusion 611 and the locating opening 42 has a good limiting and guiding effect on the locating pin 4, preventing it from making unnecessary movement during the clamping process.

[0029] The magnetic attraction device 8 is arranged on the end surface of the clamp seat 7 corresponding to the peripheral position of the clamp shell 6. In this embodiment, the magnetic attraction device 8 is preferably a ring-shaped electromagnet, which can provide a strong adsorption force and has the advantages of fast switching and easy control. In other embodiments, the magnetic attraction device 8 can also be a square electromagnet, and a plurality of square electromagnets are symmetrically distributed at the peripheral position of the clamp shell 6 and fixed on the end surface of the clamp seat 7.

[0030] The working steps of the automatic clamping device for disc-shaped tools of the utility model are as follows:

[0031] Before the disc-shaped tool 10 is installed, the linear drive device 9 is in an extended state, the conical head 21 of the positioning rod 2 is in a non-contact state with the positioning pin 4, and the elastic strip 5 holds the positioning pin 4. Since the through hole 41 is eccentrically arranged at the upper position of the positioning pin 4, in the natural state, the positioning pin 4 is retracted into the slot 61 of the clamp shell 6, that is, the positioning surface of the positioning pin 4 is lower than the outer wall of the clamp shell 6. Since there is a large dimensional tolerance between the inner hole of the disc-shaped tool 10 and the outer wall of the clamp shell 6, the positioning and placement of the robot can be satisfied.

[0032] After the manipulator places the disc-shaped tool 10, the linear drive device 9 performs a retracting action to pull the positioning rod 2 backward, and pushes the four positioning pins 4 through the conical head 21 to be exposed from the slots 61 in four directions at the same amount at the same time, and at the same time press against the inner hole of the disc-shaped tool 10, so as to achieve the function of locating the inner hole center of the disc-shaped tool 10; because the conical head 21 and each positioning pin 4 have the same contact tilt angle, it is ensured that during the extrusion force process, the positioning pin 4 is evenly stressed and has good clamping stability. At the same time, when the magnetic attraction device 8 is in magnetic attraction, the disc-shaped tool 10 is tightly attached to the front end face of the clamp seat 7, effectively ensuring that the axis of the disc-shaped tool 10 coincides with the axis of the clamping device, and effectively improving the clamping accuracy.

[0033] After the processing is completed, the manipulator grabs the disc-shaped tool 10, the magnetic suction device 8 is demagnetized, and the linear drive device 9 pushes the positioning rod 2 forward to release the disc-shaped tool 10. The manipulator can then take away the disc-shaped tool 10, which is simple and convenient to operate.

[0034] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementations disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model. Other devices that are the same or similar to them are all within the protection scope of the utility model.

Claims

1. An automatic clamping device for a disc-shaped tool, comprising a table, characterized in that: It also includes a positioning rod, a center ring, a positioning pin, an elastic strip, a clamp shell, a clamp seat, a magnetic attraction device and a linear drive device. The clamp seat is arranged on a table and is provided with a through hole for the positioning rod to pass through. The center ring is arranged in the through hole. The positioning rod is movably arranged on the center ring. The linear drive device is arranged on the table and is connected to the tail end of the positioning rod. The clamp shell is located at the center position of the end face of the clamp seat. The front end of the positioning rod is located in the clamp shell and is provided with a conical head. The clamp shell is symmetrically provided with a plurality of grooves matched with the positioning pin in a circle center. The positioning pin is arranged in the groove through an elastic strip and retracts into the groove under the elastic force of the elastic strip. The bottom surface of the positioning pin is provided with an inclined surface matched with the conical head. The axial backward movement of the conical head can push the positioning pin to expose the groove. The magnetic attraction device is arranged on the end face of the clamp seat corresponding to the peripheral position of the clamp shell.

2. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: The radial cross section of the conical head is circular or regular polygonal.

3. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: The slot is in the shape of an elongated strip.

4. The automatic clamping device for disc-shaped tools according to claim 3, characterized in that: The four corners of the slot are provided with square protrusions, and the positioning pin is provided with positioning openings matched with the square protrusions.

5. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: A through hole is provided at the upper portion of the positioning pin, the elastic strip passes through the through hole, and two ends are fixed on two sides of the slot.

6. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: The front end of the through hole is provided with a clamping ring, and the rear end is provided with a baffle plate capable of positioning the center ring therein.

7. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: A plurality of balls are distributed on the central sleeve ring.

8. The automatic clamping device for disc-shaped tools according to claim 1, characterized in that: The front end of the positioning pin is thinner and the rear end gradually thickens. The radial cross section of the conical head is circular, and an arc-shaped recess matching the outer contour of the conical head is provided on the inclined surface.

9. The automatic clamping device for disc-shaped tools according to any one of claims 1 to 8, characterized in that: The magnetic attraction device is a ring-shaped electromagnet.

10. The automatic clamping device for disc-shaped tools according to any one of claims 1 to 8, characterized in that: The linear drive device is a pneumatic cylinder, an oil cylinder or a linear motor.

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