Clamping device and clamping method thereof

Abstract

The invention discloses a clamping device and a clamping method thereof, relates to the technical field of clamping devices, and aims to solve the problem that the stability of a clamped workpiece is poor due to the fact that clamping force in a single direction is applied to the workpiece only through clamping of a pin shaft and a groove between a clamping groove of an existing clamp and the workpiece. The sliding groove is formed in the lower end of the interior of the body, and positioning grooves are formed in the two sides of the inner wall of the sliding groove; the ball head guiding pieces are installed in the positioning groove, the number of the ball head guiding pieces is multiple, and the multiple ball head guiding pieces are distributed in the positioning groove at equal intervals; the wedge-shaped bearing guide strip is installed on the inner wall of one side of the sliding groove, and the wedge-shaped bearing guide strip is arranged at the upper end of the positioning groove; the hydraulic oil conveying pipe is installed in the front protection plate, a plurality of hydraulic cylinders are installed at the front end of the hydraulic oil conveying pipe, and the hydraulic cylinders are distributed at the front end of the hydraulic oil conveying pipe at equal intervals.

Description

Technical Field

[0001] The invention relates to the technical field of clamping devices, in particular to a clamping device and a clamping method thereof. Background Art

[0002] A fixture is a device used to fix the object to be processed in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. It is also called a clamp. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process in the process can be called a fixture.

[0003] Existing clamps, such as announcement number CN101322994B, mention a clamping system for clamping multiple tools, wherein the system includes: a main body; an elongated groove arranged in the main body, for receiving a clamping portion of at least one tool; at least one pushing element that can extend into the groove, for moving the clamping portion of the tool against the wall of the groove; wherein a shape-imposing moving device is used to move the at least one pushing element from a first position that basically releases the groove to a second position, wherein the first position enables the clamping portion of the tool to be inserted into the groove, and the second position allows the at least one pushing element to extend into the groove.

[0004] However, the clamping groove of the above-mentioned clamp only applies a clamping force in a single direction to the workpiece through the engagement of the pin shaft and the groove, resulting in poor stability of the workpiece after clamping. Therefore, we provide a clamping device and a clamping method thereof. Summary of the invention

[0005] The object of the present invention is to provide a clamping device and a clamping method thereof to solve the problem that the clamping groove of the existing clamp proposed in the above background technology only applies a single-direction clamping force to the workpiece through the engagement of the pin shaft and the groove, resulting in poor stability of the workpiece after clamping.

[0006] To achieve the above object, the present invention provides the following technical solution: a clamping device, comprising a body, both sides of the body are installed with U-shaped side guard plates, the upper end of the body is installed with an upper guard plate, the front end of the body is installed with a front guard plate, and the rear end of the body is installed with a rear guard plate;

[0007] Also includes:

[0008] A slide groove is arranged at the lower end of the body, and positioning grooves are arranged on both sides of the inner wall of the slide groove;

[0009] A ball head guide is installed inside the positioning groove, and a plurality of ball head guides are provided, and the plurality of ball head guides are evenly distributed inside the positioning groove;

[0010] A wedge-shaped supporting guide bar is installed on the inner wall of one side of the slide groove, and the wedge-shaped supporting guide bar is arranged at the upper end of the positioning groove;

[0011] A hydraulic oil pipe is installed inside the front guard plate, a hydraulic cylinder is installed at the front end of the hydraulic oil pipe, a plurality of hydraulic cylinders are provided, and the plurality of hydraulic cylinders are equidistantly distributed at the front end of the hydraulic oil pipe, a telescopic hole is provided at the connection between the hydraulic cylinder and the front guard plate, and the telescopic hole is connected to the slide groove, and a wedge-shaped positioning block is installed on the output end of the hydraulic cylinder.

[0012] Preferably, a mounting portion is provided at the upper end of the upper guard plate, a mounting groove is provided on one side of the mounting portion, and the mounting groove and the mounting portion are integrally formed.

[0013] Preferably, a circular limiting groove is provided at the upper end of the ball head guide, a return spring is installed inside the ball head guide, the lower end of the return spring is fixedly connected to the inner wall of the bottom surface of the ball head guide, an annular clamp is installed at the upper end of the return spring, a ball is provided at the upper end of the annular clamp, and the upper end of the ball extends to the outside of the circular limiting groove.

[0014] Preferably, two first through holes are provided inside the U-shaped side guard plate, first screws are provided inside the first through holes, and the U-shaped side guard plate is threadedly connected to the body through the first screws in the first through holes.

[0015] Preferably, a second through hole is provided inside the upper guard plate, and a plurality of second through holes are provided, and a second screw is installed inside each of the plurality of second through holes, and the upper guard plate is threadedly connected to the body through the second screw in the second through hole.

[0016] Preferably, a third through hole is provided inside the end face of the front guard plate, a fourth through hole is provided below the third through hole, a plurality of the third through holes and a plurality of the fourth through holes are provided, and the plurality of third through holes and the plurality of fourth through holes are equidistantly distributed on the end face of the front guard plate, a third screw is provided inside the third through hole and the fourth through hole, and the front guard plate is threadedly connected to the main body through the third screws in the third through hole and the fourth through hole.

[0017] Preferably, a card slot is provided on the inner wall of the upper end of the rear guard plate, a protrusion is provided at the connection between the card slot of the rear guard plate and the main body, and the protrusion is integrally formed with the main body.

[0018] Preferably, a liquid inlet joint is provided below one end of the hydraulic oil delivery pipe, and a liquid outlet joint is provided below the other end of the hydraulic oil delivery pipe, and the lower ends of the liquid inlet joint and the liquid outlet joint both extend to the outside of the front guard plate.

[0019] Preferably, a polytetrafluoroethylene coating is provided on the outer wall of the wedge-shaped supporting guide bar.

[0020] Preferably, a clamping method of a clamping device comprises the following steps:

[0021] Step 1: When clamping, first slide multiple workpieces horizontally along the slide groove of the main body into the inside of the device in sequence. Wedge-shaped notches are provided on both sides of the workpieces. When sliding, align the wedge-shaped notch on one side of the workpiece with the wedge-shaped supporting guide bar on one side of the inner wall of the slide groove to provide supporting force and auxiliary guiding effect during the sliding process;

[0022] Step 2: During the sliding process, the ball head guides in the positioning grooves on both sides of the inner wall of the slide groove further improve the smoothness of the sliding of the workpiece by relying on the balls at the ends;

[0023] Step 3: After the multiple workpieces have slid into the device, the hydraulic system is started, and the hydraulic oil is supplied into the hydraulic oil pipe along the liquid inlet joint to drive the multiple groups of hydraulic cylinders in the device to operate, and the wedge-shaped positioning blocks at the output ends of the hydraulic cylinders are controlled to extend and engage in the wedge-shaped notches on the other side of the workpieces;

[0024] Step 4: After the workpiece is positioned, the ball guides located in the positioning grooves on both sides of the inner wall of the slideway, with the internal balls popped out under the elastic action of the return spring, fit tightly to the surface of the workpiece, and further exert a certain clamping force on the workpiece.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention ensures the clamping accuracy of the clamping device by adopting a hydraulically matched wedge structure and a ball head guide. During the process, multiple workpieces are horizontally slid into the device along the slide groove of the body in sequence. When sliding, the wedge-shaped notch on one side of the workpiece is aligned with the wedge-shaped supporting guide bar on one side of the inner wall of the slide groove, providing supporting force and auxiliary guiding effect during the sliding process. After the multiple workpieces slide into the device, the hydraulic system is started, and the hydraulic oil is supplied into the hydraulic oil delivery pipe along the liquid inlet joint to drive the multiple groups of hydraulic cylinders in the device to operate, and the wedge-shaped clamping block at the output end of the hydraulic cylinder is controlled to extend, and the clamping The spherical guide members located in the positioning grooves on both sides of the inner wall of the slide groove can be ejected under the elastic action of the reset spring and fit tightly to the surface of the workpiece, thereby further exerting a certain clamping force on the workpiece. With the wedge-shaped supporting guide strip and the wedge-shaped positioning block, four-point clamping is achieved. With the above structure using a relatively small hydraulic pressure, the clamping tightness is significantly improved, and the problem of poor stability of the workpiece after clamping is solved, in which the clamping groove of the existing fixture and the workpiece only exert a clamping force in a single direction on the workpiece through the engagement of the pin shaft and the groove.

[0027] 2. When the workpiece slides along the slide groove inside the body, the ball head guide can rely on the spherical ball structure to provide auxiliary guidance for both sides of the workpiece, preventing the workpiece from deflecting and making the workpiece slide more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0030] Figure 3 It is a partial structural enlarged schematic diagram of a clamping device of the present invention;

[0031] Figure 4 It is an enlarged schematic diagram of the structure of part B of the present invention;

[0032] Figure 5 It is a schematic diagram of the internal structure of the ball head guide of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the reset frame and the pressing plate of the present invention;

[0034] In the figure: 1, body; 2, U-shaped side guard plate; 3, first through hole; 4, first screw; 5, upper guard plate; 6, mounting portion; 7, second through hole; 8, mounting groove; 9, front guard plate; 10, third through hole; 11, fourth through hole; 12, rear guard plate; 13, slide groove; 14, positioning groove; 15, ball head guide; 151, return spring; 152, annular clamp; 153, circular limit groove; 154, ball; 16, wedge-shaped supporting guide strip; 17, telescopic hole; 18, wedge-shaped blocking block; 19, second screw; 20, protrusion; 21, clamping groove; 22, hydraulic oil pipeline; 23, liquid inlet joint; 24, hydraulic cylinder; 25, third screw; 26, workpiece; 261, wedge-shaped notch. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] See also Figure 1-5 , an embodiment provided by the present invention: a clamping device, comprising a body 1, both sides of the body 1 are installed with U-shaped side guard plates 2, the upper end of the body 1 is installed with an upper guard plate 5, the front end of the body 1 is installed with a front guard plate 9, and the rear end of the body 1 is installed with a rear guard plate 12;

[0037] Also includes:

[0038] A slide groove 13 is arranged at the lower end of the body 1, and positioning grooves 14 are arranged on both sides of the inner wall of the slide groove 13;

[0039] A ball guide 15 is installed inside the positioning groove 14. A plurality of ball guides 15 are provided, and the plurality of ball guides 15 are evenly distributed inside the positioning groove 14.

[0040] A wedge-shaped supporting guide bar 16 is installed on the inner wall of one side of the slide groove 13, and the wedge-shaped supporting guide bar 16 is arranged at the upper end of the positioning groove 14;

[0041] A hydraulic oil delivery pipe 22 is installed inside the front guard plate 9. A hydraulic cylinder 24 is installed at the front end of the hydraulic oil delivery pipe 22. There are multiple hydraulic cylinders 24, and the multiple hydraulic cylinders 24 are equidistantly distributed at the front end of the hydraulic oil delivery pipe 22. A telescopic hole 17 is provided at the connection between the hydraulic cylinder 24 and the front guard plate 9, and the telescopic hole 17 is connected to the slide groove 13. A wedge-shaped blocking block 18 is installed on the output end of the hydraulic cylinder 24.

[0042] See also Figure 1 A mounting portion 6 is provided at the upper end of the upper guard plate 5, a mounting groove 8 is provided on one side of the mounting portion 6, and the mounting groove 8 is integrally formed with the mounting portion 6. The device can be inserted into a basic mounting part such as a machine tool through the mounting groove 8 on the mounting portion 6 to ensure the stability of the clamping device during use and prevent it from falling off.

[0043] See also Figure 6 The upper end of the ball guide 15 is provided with a circular limiting groove 153, and a return spring 151 is installed inside the ball guide 15. The lower end of the return spring 151 is fixedly connected to the inner wall of the bottom surface of the ball guide 15, and the upper end of the return spring 151 is provided with an annular clamp 152. The upper end of the annular clamp 152 is provided with a ball 154, and the upper end of the ball 154 extends to the outside of the circular limiting groove 153. The setting of the ball guide 15, on the one hand, when the workpiece 26 is along the slide groove 1 inside the body 1 When sliding, the spherical ball bearing 154 structure can play an auxiliary guiding role on both sides of the workpiece 26, preventing the workpiece 26 from deflecting and making the workpiece 26 slide more smoothly. On the other hand, after the workpiece 26 is clamped and positioned, the ball bearing 154 in the ball head guide 15 can be ejected under the elastic action of the return spring 151, and fit closely to the surface of the workpiece 26, further exerting a certain clamping force on the workpiece, and cooperating with the wedge-shaped supporting guide bar 16 and the wedge-shaped clamping block 18 to achieve four-point clamping.

[0044] See also Figure 1 and Figure 5The U-shaped side guard plate 2 is provided with two first through holes 3 inside, the first through holes 3 are provided with first screws 4 inside, and the U-shaped side guard plate 2 is threadedly connected to the body 1 through the first screws 4 in the first through holes 3, the upper guard plate 5 is provided with a second through hole 7 inside, the second through holes 7 are provided with a plurality of second through holes, and the second screws 19 are installed inside the plurality of second through holes 7, the upper guard plate 5 is threadedly connected to the body 1 through the second screws 19 in the second through holes 7, the inner surface of the front guard plate 9 is provided with a third through hole 10, and a fourth through hole 11 is provided below the third through hole 10, and the third through hole 10 and the fourth through hole 11 are provided with multiple third through holes 10 and fourth through holes 11, and the multiple third through holes 10 and fourth through holes 11 are equidistantly distributed on the end surface of the front guard plate 9, and the third screws 25 are provided inside the third through holes 10 and the fourth through holes 11. The front guard plate 9 is threadedly connected to the main body 1 through the third screws 25 in the third through holes 10 and the fourth through holes 11. The device is provided with guard plate structures all around. The guard plates are made of high-strength alloy and can provide good protection for the internal body. All guard plates except the rear guard plate are detachable structures fixed by screws. When a single guard plate is excessively worn or damaged, it can be replaced independently, thereby reducing maintenance costs.

[0045] See also Figure 5 A card slot 21 is provided on the inner wall of the upper end of the rear guard plate 12, and a protrusion 20 is provided at the connection between the card slot 21 of the rear guard plate 12 and the main body 1, and the protrusion 20 and the main body 1 are integrally formed. The rear guard plate 12 adopts the card slot 21 structure to engage with the main body 1, and cooperates with the pressing of the upper guard plate 5 to achieve limited fixation, which also has the technical effect of facilitating replacement and maintenance.

[0046] See also Figure 5 A liquid inlet joint 23 is provided below one end of the hydraulic oil pipe 22, and a liquid outlet joint is provided below the other end of the hydraulic oil pipe 22. The lower ends of the liquid inlet joint 23 and the liquid outlet joint both extend to the outside of the front guard plate 9. The hydraulic oil pipe 22 is externally connected to a hydraulic system to provide power for the operation of the hydraulic cylinder 24 in the device.

[0047] Furthermore, a polytetrafluoroethylene coating is provided on the outer wall of the wedge-shaped supporting guide bar 16. The polytetrafluoroethylene coating has good corrosion resistance and can extend the service life of the wedge-shaped supporting guide bar 16. The polytetrafluoroethylene coating is a self-lubricating coating. When the workpiece 26 is slid into the slide groove 13, the wedge-shaped groove 261 on its side is not prone to wear when sliding along the wedge-shaped supporting guide bar 16.

[0048] See also Figure 1-6 , a clamping method of a clamping device, comprising the following steps:

[0049] Step 1: When clamping, first slide multiple workpieces 26 horizontally along the slide groove 13 of the body 1 into the device in sequence. Both sides of the workpiece 26 are provided with wedge-shaped notches 261. When sliding, align the wedge-shaped notches 261 on one side of the workpiece 26 with the wedge-shaped supporting guide bar 16 on one side of the inner wall of the slide groove 13 to provide supporting force and auxiliary guiding effect during the sliding process;

[0050] Step 2: During the sliding process, the ball guides 15 in the positioning grooves 14 on both sides of the inner wall of the slide groove 13 further improve the smoothness of the sliding of the workpiece 26 by means of the balls 154 at the ends;

[0051] Step 3: After the multiple workpieces 26 slide into the device, start the hydraulic system, supply hydraulic oil into the hydraulic oil pipe 22 along the liquid inlet joint 23, drive the multiple groups of hydraulic cylinders 24 in the device to operate, and control the wedge-shaped positioning block 18 at the output end of the hydraulic cylinder 24 to extend and engage in the wedge-shaped notch 261 on the other side of the workpiece 26;

[0052] Step 4: After the workpiece 26 is positioned, the ball guide 15 located in the positioning grooves 14 on both sides of the inner wall of the slide groove 13, its internal balls 154 are ejected under the elastic action of the return spring 151, and fit tightly to the surface of the workpiece 26, further applying a certain clamping force to the workpiece.

[0053] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A clamping device, comprising a body (1), U-shaped side guard plates (2) are installed on both sides of the body (1), an upper guard plate (5) is installed on the upper end of the body (1), a front guard plate (9) is installed on the front end of the body (1), and a rear guard plate (12) is installed on the rear end of the body (1); characterized in that: Also includes: A slide groove (13) is arranged at the lower end of the body (1), and positioning grooves (14) are arranged on both sides of the inner wall of the slide groove (13); A ball head guide (15) is installed inside the positioning groove (14), and a plurality of ball head guides (15) are provided, and the plurality of ball head guides (15) are evenly distributed inside the positioning groove (14); A wedge-shaped supporting guide bar (16) is installed on the inner wall of one side of the slide groove (13), and the wedge-shaped supporting guide bar (16) is arranged at the upper end of the positioning groove (14); The upper end of the ball head guide (15) is provided with a circular limiting groove (153), the interior of the ball head guide (15) is provided with a return spring (151), the lower end of the return spring (151) is fixedly connected to the inner wall of the bottom surface of the ball head guide (15), the upper end of the return spring (151) is provided with an annular clamp (152), the upper end of the annular clamp (152) is provided with a ball (154), and the upper end of the ball (154) extends to the outside of the circular limiting groove (153); A hydraulic oil delivery pipe (22) is installed inside the front guard plate (9), a hydraulic cylinder (24) is installed at the front end of the hydraulic oil delivery pipe (22), a plurality of hydraulic cylinders (24) are provided, and the plurality of hydraulic cylinders (24) are evenly distributed at the front end of the hydraulic oil delivery pipe (22), a telescopic hole (17) is provided at the connection between the hydraulic cylinder (24) and the front guard plate (9), and the telescopic hole (17) is connected to the slide groove (13), and a wedge-shaped blocking block (18) is installed on the output end of the hydraulic cylinder (24); A liquid inlet joint (23) is provided below one end of the hydraulic oil delivery pipe (22), and a liquid outlet joint is provided below the other end of the hydraulic oil delivery pipe (22), and the lower ends of the liquid inlet joint (23) and the liquid outlet joint both extend to the outside of the front guard plate (9).

2. The clamping device according to claim 1, characterized in that The upper end of the upper guard plate (5) is provided with a mounting portion (6), one side of the mounting portion (6) is provided with a mounting groove (8), and the mounting groove (8) and the mounting portion (6) are integrally formed.

3. The clamping device according to claim 1, characterized in that: Two first through holes (3) are arranged inside the U-shaped side guard plate (2), first screws (4) are arranged inside the first through holes (3), and the U-shaped side guard plate (2) is threadedly connected to the body (1) via the first screws (4) in the first through holes (3).

4. The clamping device according to claim 1, characterized in that: The upper guard plate (5) is provided with a second through hole (7) inside, and a plurality of second through holes (7) are provided, and a second screw (19) is installed inside each of the plurality of second through holes (7). The upper guard plate (5) is threadedly connected to the body (1) via the second screw (19) in the second through hole (7).

5. The clamping device according to claim 4, characterized in that A third through hole (10) is provided inside the end surface of the front guard plate (9), and a fourth through hole (11) is provided below the third through hole (10). A plurality of the third through holes (10) and the fourth through holes (11) are provided, and the plurality of third through holes (10) and the fourth through holes (11) are equidistantly distributed on the end surface of the front guard plate (9). A third screw (25) is provided inside the third through hole (10) and the fourth through hole (11), and the front guard plate (9) is threadedly connected to the body (1) via the third screw (25) in the third through hole (10) and the fourth through hole (11).

6. The clamping device according to claim 5, characterized in that A slot (21) is provided on the inner wall of the upper end of the rear guard plate (12), a protrusion (20) is provided at the connection between the slot (21) of the rear guard plate (12) and the body (1), and the protrusion (20) and the body (1) are integrally formed.

7. The clamping device according to claim 1, characterized in that: A polytetrafluoroethylene coating is provided on the outer wall of the wedge-shaped supporting guide bar (16).

8. A clamping method for implementing a clamping device as claimed in any one of claims 1 to 7, characterized in that: include: S1. When clamping, first slide a plurality of workpieces (26) horizontally along the slide groove (13) of the main body (1) into the interior of the device in sequence. Both sides of the workpieces (26) are provided with wedge-shaped notches (261). When sliding, align the wedge-shaped notches (261) on one side of the workpiece (26) with the wedge-shaped supporting guide strip (16) on one side of the inner wall of the slide groove (13), so as to provide supporting force and auxiliary guiding effect during the sliding process; S2. During the sliding process, the ball head guide (15) in the positioning grooves (14) on both sides of the inner wall of the slide groove (13) further improves the smoothness of the sliding of the workpiece (26) by means of the balls (154) at the ends; S3, after the multiple workpieces (26) have all slid into the device, the hydraulic system is started, and hydraulic oil is supplied to the hydraulic oil delivery pipe (22) along the liquid inlet joint (23), so as to drive the multiple groups of hydraulic cylinders (24) in the device to operate, and control the wedge-shaped positioning blocks (18) at the output ends of the hydraulic cylinders (24) to extend and engage in the wedge-shaped notches (261) on the other side of the workpieces (26); S4. After the workpiece (26) is positioned, the ball head guide (15) located in the positioning grooves (14) on both sides of the inner wall of the slide groove (13) has its internal balls (154) popped out under the elastic action of the return spring (151), tightly fits the surface of the workpiece (26), and further applies a certain clamping force to the workpiece.

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