Special clamp based on circular pipe clamping and positioning

Abstract

The utility model relates to the field of clamps for circular pipes, and provides a special clamp based on circular pipe clamping and positioning, which comprises a base. A clamp structure is arranged on the base; the number of the clamp structures is two, and the two clamp structures act synchronously. The clamp structure comprises a supporting table, a first clamp, a second clamp and a third clamp. The supporting table is mounted on the base; the first clamp, the second clamp and the third clamp are sequentially installed in the supporting table. The second clamp is a movable clamp; a workpiece is clamped through the two sets of clamps which are combined together, the large-diameter hydraulic cylinder is adopted, the jaw part is of a reticulate pattern structure, enough clamping force can be guaranteed, a round pipe can be accurately positioned in the clamping and loosening states, the clamp is suitable for automatic machining and automatic workpiece taking and placing of a mechanical arm, and the work efficiency is improved. The problem that the clamping positions are inconsistent is effectively solved, automatic transferring of the workpieces is achieved, and then the production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of clamps for round tubes, in particular to a special clamp based on the clamping and positioning of round tubes. Background Art

[0002] A split-type clamp is a commonly used fixture, widely used in the production process of various mechanical parts. It usually adopts a structure with a fixed jaw on one side and a movable jaw on the other side. The movable jaw presses the workpiece in the fixed jaw to achieve side positioning and clamping. The clamping action is mainly completed by mechanical means (such as screw and nut mechanisms), cylinders, hydraulic cylinders, etc.; when the clamp is loosened, the workpiece is in a free state, and the movement of the workpiece will lead to inconsistent clamping positions. When the robot picks and places the workpiece, the workpiece cannot be automatically transferred; for example, when shrinking large-diameter round tubes (such as directly 120mm and wall thickness of 8mm or more), the clamping clamp is required to have sufficient clamping force to ensure that the round tube does not move axially, but the existing equipment cannot meet this demand. Utility Model Content

[0003] The utility model proposes a special clamp based on round tube clamping and positioning, which clamps the workpiece by combining two sets of clamps together and adopts a large-diameter hydraulic cylinder. The jaw part has a mesh structure, which can ensure sufficient clamping force. The round tube can be accurately positioned in both clamping and loosening states. It is suitable for automated processing and automatic picking and placing of parts by robots, effectively solving the problem of inconsistent clamping positions, realizing the automated transfer of workpieces, and thus greatly improving production efficiency.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A special clamp based on round pipe clamping and positioning, comprising: a base;

[0006] A clamp structure is provided on the base;

[0007] The clamp structures are provided with two groups, and the two groups of clamp structures act synchronously;

[0008] The clamp structure includes a support platform, a first clamp, a second clamp and a third clamp;

[0009] The support platform is mounted on the base;

[0010] The first clamp, the second clamp and the third clamp are sequentially mounted on the support platform;

[0011] The first clamp, the second clamp and the third clamp are coaxially arranged;

[0012] The second clamp is a movable clamp.

[0013] Furthermore, the support platform includes a first support wall, a second support wall, a first pressing plate and a second pressing plate;

[0014] The first supporting wall and the second supporting wall are spaced apart and installed opposite to each other on the base;

[0015] The first pressing plate is installed on the top of the outer ends of the first supporting wall and the second supporting wall at the same time;

[0016] The second pressing plate is installed on the inner end tops of the first supporting wall and the second supporting wall at the same time;

[0017] The first supporting wall is provided with a first clamping opening, and the first clamp is installed in the first clamping opening;

[0018] A second clamping opening is formed between the first supporting wall and the second supporting wall, and the second clamp is installed in the second clamping opening;

[0019] A third clamping opening is provided on the second supporting wall, and the third clamp is installed in the third clamping opening.

[0020] Furthermore, the second clamp includes a hydraulic cylinder, a second positioning portion and a second limiting portion;

[0021] Positioning platforms are installed on the outer sides of the first supporting wall and the second supporting wall;

[0022] The hydraulic cylinder is mounted on the positioning platform, and the hydraulic rod of the hydraulic cylinder extends toward the second clamping opening;

[0023] The second limiting portion is slidably mounted on one side of the second clamping opening;

[0024] The other side of the second clamping opening forms the second positioning portion;

[0025] The second limiting portion is connected to the hydraulic rod of the hydraulic cylinder, and the hydraulic cylinder drives the second limiting portion to slide forward and backward.

[0026] Furthermore, the first clamp includes a first positioning portion and a first limiting portion, and the first positioning portion and the first limiting portion are formed on opposite sides of the first clamping opening respectively;

[0027] The third clamp includes a third positioning portion and a third limiting portion, and the third positioning portion and the third limiting portion are formed on opposite sides of the third clamping opening respectively;

[0028] The first limiting portion, the second positioning portion and the third limiting portion are located on the same side;

[0029] The first positioning portion, the second limiting portion and the third positioning portion are located on the same side.

[0030] Furthermore, a first clamp, a second clamp and a third clamp are respectively installed on the first limiting portion, the second limiting portion and the third limiting portion.

[0031] Furthermore, the first chuck, the second chuck and the third chuck are all replaceable chucks.

[0032] Furthermore, the clamping surfaces of the first clamping head, the second clamping head and the third clamping head are all provided with anti-slip mesh patterns.

[0033] The utility model clamps the workpiece by combining two sets of clamps together, and adopts a large-diameter hydraulic cylinder. The jaw part has a mesh structure, which can ensure sufficient clamping force. The round tube can be accurately positioned in both the clamping and release states. It is suitable for automated processing and automatic picking and placing of parts by robots, effectively solving the problem of inconsistent clamping positions, realizing the automated transfer of workpieces, and thus greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 This is a structural diagram of a special clamp based on round pipe clamping and positioning in a specific embodiment of the utility model;

[0036] Figure 2 for Figure 1 The exploded view of a special clamp for clamping and positioning a round tube is shown;

[0037] Figure 3 for Figure 1 、 Figure 2 The structure diagram of a special clamp based on round tube clamping and positioning is shown;

[0038] Figure 4 for Figure 1-Figure 3 A schematic diagram of the connection relationship of a special clamp based on round tube clamping and positioning is shown;

[0039] Description of reference numerals: DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the specific embodiment of the present invention, see Figure 1-Figure 4 , a special clamp based on round tube clamping and positioning, comprising: a base 1;

[0042] See Figure 1 , further comprising a clamp structure 2, wherein the clamp structure 2 comprises a support platform 24;

[0043] The support platform 24 is installed on the base 1;

[0044] The support platform 24 includes a first support wall 241, a second support wall 242, a first pressing plate 243 and a second pressing plate 244;

[0045] The first support wall 241 and the second support wall 242 are spaced apart and installed opposite to each other on the base 1 and can be welded or bolted together; the first support wall 241 and the second support wall 242 are both made by digging holes in two plates;

[0046] The first pressing plate 243 is simultaneously installed on the top of the outer ends of the first supporting wall 241 and the second supporting wall 242 by bolt connection or welding;

[0047] The second pressing plate 244 is simultaneously installed on the top of the inner ends of the first supporting wall 241 and the second supporting wall 242 by bolt connection or welding;

[0048] The bottoms of the first pressing plate 243 and the second pressing plate 244 are suspended in the air, providing space for the installation and sliding of the second clamp.

[0049] In the specific embodiment of the present invention, see Figure 1 , the clamp structure 2 further includes a first clamp 21, a second clamp 22 and a third clamp 23;

[0050] The first supporting wall 241 is provided with a first clamping opening 2411 , and the first clamp 21 is installed in the first clamping opening 2411 ;

[0051] A second clamping opening 245 is formed between the first supporting wall 241 and the second supporting wall 242 , and the second clamp 22 is installed in the second clamping opening;

[0052] A third clamping opening 2421 is provided on the second supporting wall 242 , and the third clamp 23 is installed in the third clamping opening 2421 .

[0053] The first clamp 21 and the third clamp 23 are fixed clamps, and the size of the clamping opening does not change before and after the workpiece is installed;

[0054] The second clamp 22 is a movable clamp, the clamping opening becomes larger before clamping the workpiece, and becomes smaller after the workpiece is placed, so as to clamp the workpiece under appropriate clamping force;

[0055] See Figure 3 During processing, the workpiece is simultaneously installed in the first clamp 2411, the second clamp 2421 and the third clamp 245. The second clamp 22 cooperates with the first clamp 21 and the third clamp 23 to clamp the workpiece to limit the position, and then the workpiece is positioned by sliding the second clamp 22.

[0056] In the specific embodiment of the present invention, see Figure 1 、 Figure 4 The second clamp 22 includes a hydraulic cylinder 223, a second positioning portion 221 and a second limiting portion 222;

[0057] The outer sides of the first supporting wall 241 and the second supporting wall 242 are both installed with positioning platforms 224;

[0058] The hydraulic cylinder 223 is mounted on the positioning platform 224, and the hydraulic rod of the hydraulic cylinder 223 extends toward the second clamping opening;

[0059] The second limiting portion 222 is slidably installed on one side of the second clamping opening;

[0060] The other side of the second clamping opening forms the second positioning portion 221;

[0061] The second limiting portion 222 is connected to the hydraulic rod of the hydraulic cylinder 223, and the hydraulic cylinder 221 drives the second limiting portion 222 to slide forward and backward;

[0062] Before working, the workpiece is first installed in the second positioning part 221 and the second limiting part 222 for preliminary positioning; then the hydraulic cylinder drives the second clamp 22 to slide and perform the final limiting on the workpiece to prevent the workpiece from slipping, shaking, etc. during the processing.

[0063] In the specific embodiment of the present invention, see Figure 1-Figure 4 The first clamp 21 includes a first positioning portion 211 and a first limiting portion 212, and the first positioning portion 211 and the first limiting portion 212 are formed on opposite sides of the first clamping opening respectively;

[0064] The third clamp 23 includes a third positioning portion 231 and a third limiting portion 232 . The third positioning portion 231 and the third limiting portion 232 are formed on two opposite sides of the third clamping opening 2421 .

[0065] The first limiting portion 212, the second positioning portion 221 and the third limiting portion 232 are located on the same side;

[0066] The first positioning portion 211, the second limiting portion 222 and the third positioning portion 231 are located on the same side;

[0067] When the workpiece is initially positioned, the first positioning part 211, the first limiting part 212, the second positioning part 221, the second limiting part 222, the third positioning part 231, and the third limiting part 232 simultaneously perform preliminary positioning on the workpiece; then the hydraulic cylinder 221 drives the second limiting part to slide to limit the workpiece. At this time, the first limiting part 212, the second limiting part 222, and the third limiting part 232 simultaneously limit the workpiece.

[0068] In the specific embodiment of the present invention, see Figure 1-Figure 4 The first limiting portion 212 , the second limiting portion 222 and the third limiting portion 232 are respectively equipped with a first clamping head 2121 , a second clamping head 2221 and a third clamping head 2321 .

[0069] In the specific embodiment of the present invention, see Figure 1-Figure 4 The first chuck 2121, the second chuck 2221 and the third chuck 2321 are all replaceable chucks. The first chuck 2121, the second chuck 2221 and the third chuck 2321 are connected by convenient means such as bolts. New chucks can be replaced after wear, which effectively extends the overall service life of the clamp.

[0070] In the specific embodiment of the present invention, see Figure 1-Figure 4 The clamping surfaces of the first chuck 2121, the second chuck 2221 and the third chuck 2321 are all provided with anti-slip mesh patterns, which can better limit the workpiece and extend the service life of the first chuck, the second chuck and the third chuck themselves.

[0071] Two sets of clamp structures are provided on the base; the two sets of clamp structures move synchronously to clamp the workpiece at the same time, and the hydraulic cylinders in the Eldar clamp structure move synchronously to ensure the stability of the clamping force and protect the workpiece from damage.

[0072] In a specific embodiment of the present invention, the clamping operation steps are as follows:

[0073] 1. The hydraulic cylinder retracts, the clamp opens to the set opening width, the position is accurate, and the workpiece is placed;

[0074] 2. The hydraulic cylinder pushes forward and the clamp closes to clamp the workpiece with accurate positioning;

[0075] 3. During the workpiece processing, the hydraulic cylinder maintains pressure and the clamp remains clamped;

[0076] 4. After the workpiece is processed, the hydraulic cylinder retracts and the positioning structure on the jaws pulls the workpiece back to the set position;

[0077] 5. The robot removes the workpiece from the fixture and puts it back in to start the next cycle.

[0078] The entire clamping process does not require manual intervention, making the work more efficient and accurate, effectively improving work efficiency; at the same time, accurate positioning effectively improves processing accuracy.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A special clamp based on round tube clamping and positioning, comprising: base; It is characterized in that: a clamp structure is provided on the base; The clamp structures are provided with two groups, and the two groups of clamp structures act synchronously; The clamp structure includes a support platform, a first clamp, a second clamp and a third clamp; The support platform is installed on the base; The first clamp, the second clamp and the third clamp are sequentially mounted on the support platform; The first clamp, the second clamp and the third clamp are coaxially arranged; The second clamp is a movable clamp.

2. A special clamp for clamping and positioning a round tube according to claim 1, characterized in that: The support platform includes a first support wall, a second support wall, a first pressing plate and a second pressing plate; The first supporting wall and the second supporting wall are spaced apart and installed opposite to each other on the base; The first pressing plate is installed on the top of the outer ends of the first supporting wall and the second supporting wall at the same time; The second pressing plate is installed on the inner end tops of the first supporting wall and the second supporting wall at the same time; A first clamping opening is provided on the first supporting wall, and the first clamp is installed in the first clamping opening; A second clamping opening is formed between the first supporting wall and the second supporting wall, and the second clamp is installed in the second clamping opening; A third clamping opening is provided on the second supporting wall, and the third clamp is installed in the third clamping opening.

3. The special clamp for clamping and positioning a round tube as claimed in claim 2, characterized in that: The second clamp includes a hydraulic cylinder, a second positioning portion and a second limiting portion; Positioning platforms are installed on the outer sides of the first supporting wall and the second supporting wall; The hydraulic cylinder is mounted on the positioning platform, and the hydraulic rod of the hydraulic cylinder extends toward the second clamping opening; The second limiting portion is slidably mounted on one side of the second clamping opening; The other side of the second clamping opening forms the second positioning portion; The second limiting portion is connected to the hydraulic rod of the hydraulic cylinder, and the hydraulic cylinder drives the second limiting portion to slide forward and backward.

4. A special clamp for clamping and positioning a round tube according to claim 3, characterized in that: The first clamp includes a first positioning portion and a first limiting portion, and the first positioning portion and the first limiting portion are formed on opposite sides of the first clamping opening respectively; The third clamp includes a third positioning portion and a third limiting portion, and the third positioning portion and the third limiting portion are formed on opposite sides of the third clamping opening respectively; The first limiting portion, the second positioning portion and the third limiting portion are located on the same side; The first positioning portion, the second limiting portion and the third positioning portion are located on the same side.

5. The special clamp for clamping and positioning a round tube according to claim 4, characterized in that: A first clamp, a second clamp and a third clamp are respectively installed on the first limiting portion, the second limiting portion and the third limiting portion.

6. The special clamp for clamping and positioning a round tube according to claim 5, characterized in that: The first chuck, the second chuck and the third chuck are all replaceable chucks.

7. The special clamp for clamping and positioning a round tube according to claim 5, characterized in that: The clamping surfaces of the first clamping head, the second clamping head and the third clamping head are all provided with anti-slip mesh patterns.

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