Automatic rotating and pressing clamp for pipe machining of machine tool

Abstract

The utility model discloses an automatic rotation pressing clamp for machine tool pipe machining, which comprises a clamp base, a first wheel support, a first lifting wheel, a second wheel support, a second lifting wheel, a driving wheel, a rotating shaft, a driving motor, a pressing block, a connecting rod, a spring, a supporting plate and a multi-station cam, and the first wheel support and the second wheel support are both fixedly arranged on the clamp base. According to the clamp, accurate indexing of machining operation of annular array characteristics of pipes is achieved through a driving motor, meanwhile, after indexing, a combination of a pressing block, a spring and a supporting plate is pushed to move downwards through station protrusions of a multi-station cam, and the pipes are pressed and fixed to two first lifting wheels and two second lifting wheels through the pressing block; therefore, automatic rotating and pressing can be achieved, it can be guaranteed that rotating indexing and pressing are synchronously matched, and then the machining operation positioning precision of the annular array characteristic of the pipe is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool clamps, in particular to an automatic rotating clamp for machining pipes on machine tools. Background Art

[0002] When the pipe is processed for indexing and opening, the marking point indexing method is adopted. This indexing method has low marking efficiency and requires high proficiency of the operator, otherwise it is easy to cause low indexing accuracy and low pipe processing accuracy. The indexing positioning method using the indexing head has high positioning accuracy, but because the clamping force of the indexing head on the hollow pipe is difficult to control, it is very easy for the indexing head to squeeze and shrink the hollow pipe in daily processing. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a clamp for synchronously cooperating the rotation indexing and the pressing positioning of hollow pipes.

[0004] In order to solve the above technical problems, the present invention is implemented through the following technical solutions: an automatic rotating clamp for machine tool processing pipes, comprising a clamp base, a first wheel bracket, a first lifting wheel, a second wheel bracket, a second lifting wheel, a driving wheel, a rotating shaft, a driving motor, a clamping block, a connecting rod, a spring, a support plate and a multi-station cam, wherein the first wheel bracket and the second wheel bracket are both fixedly mounted on the clamp base, the two first lifting wheels are fixedly mounted on the first wheel bracket, the two second lifting wheels are fixedly mounted on the second wheel bracket, the two ends of the rotating shaft are rotatably mounted on the clamp base and the second wheel bracket respectively, and the driving motor is fixedly mounted on the clamp base The right end of the rotating shaft is transmission-connected with the output shaft of the driving motor, the driving wheel and the multi-station cam are fixedly sleeved and installed on the rotating shaft, the driving wheel is in transmission contact with the bottom of one of the second lifting wheels, four connecting rods are slidably installed on the clamp base in a rectangular distribution, the clamping block and the support plate are respectively fixedly installed on the upper and lower ends of the connecting rod, the spring is sleeved and installed on the connecting rod, the upper and lower ends of the spring act on the clamping block and the clamp base respectively, the clamping block is provided with an arc-shaped slot matching the pipe, a pressure sensor is fixedly installed in the arc-shaped slot, and the pressure sensor and the driving motor are respectively circuit-connected to the control module.

[0005] Preferably, a non-slip rubber sleeve is fixedly mounted on the driving wheel.

[0006] Preferably, handles are fixedly provided on both sides of the clamp base.

[0007] Preferably, a reinforcing guide sleeve is coaxially and integrally formed on the multi-station cam.

[0008] Preferably, a first guide sleeve is fixedly mounted on the top of the clamp base, and the connecting rod is slidably mounted in the first guide sleeve.

[0009] Compared with the prior art, the advantages of the utility model are as follows: the clamp realizes precise indexing of the processing operation of the circular array feature of the pipe through a driving motor, and at the same time, after the indexing, the combination of the clamping block, the spring, and the support plate is pushed downward by the protrusions of each station of the multi-station cam, and the pipe is clamped and fixed on the two first lifting wheels and the two second lifting wheels through the clamping block, so that automatic rotation clamping can be realized, and the rotation indexing and clamping can be ensured to be synchronized, thereby improving the positioning accuracy of the processing operation of the circular array feature of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings.

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a three-dimensional diagram of a multi-position cam. DETAILED DESCRIPTION

[0013] The utility model is described in detail below in conjunction with specific implementation methods:

[0014] like Figure 1 and Figure 2 The automatic rotating clamp for machining pipes on a machine tool shown in the figure comprises a clamp base 1, a first wheel bracket 2, a first lifting wheel 21, a second wheel bracket 3, a second lifting wheel 31, a driving wheel 32, a rotating shaft 4, a driving motor 5, a clamping block 6, a connecting rod 7, a spring 71, a supporting plate 8 and a multi-station cam 9. The first wheel bracket 2 and the second wheel bracket 3 are both fixedly mounted on the clamp base 1, the two first lifting wheels 21 are fixedly mounted on the first wheel bracket 2, the two second lifting wheels 31 are fixedly mounted on the second wheel bracket 3, the two ends of the rotating shaft 4 are rotatably mounted on the clamp base 1 and the second wheel bracket 3 respectively, the driving motor 5 is fixedly mounted on the clamp base 1, and the right end of the rotating shaft 4 It is connected to the output shaft of the driving motor 5, and the driving wheel 32 and the multi-station cam 9 are fixedly sleeved and installed on the rotating shaft 4. The driving wheel 32 is in transmission contact with the bottom of one of the second lifting wheels 31. Four connecting rods 7 are slidably installed on the clamp base 1 in a rectangular distribution. The clamping block 6 and the support plate 8 are respectively fixedly installed on the upper and lower ends of the connecting rod 7. The spring 71 is sleeved and installed on the connecting rod 7. The upper and lower ends of the spring 71 act on the clamping block 6 and the clamp base 1 respectively. The clamping block 6 is provided with an arc-shaped groove matching the pipe 10, and a pressure sensor is fixedly installed in the arc-shaped groove. The pressure sensor and the driving motor are respectively connected to the control module by circuits.

[0015] The driving wheel 32 is fixedly sleeved with an anti-skid rubber sleeve to increase the friction between the driving wheel 32 and the second lifting wheels 31 , thereby driving one of the second lifting wheels 31 to rotate synchronously with the driving wheel 32 .

[0016] Handles 11 are fixedly provided on both sides of the clamp base 1 to facilitate the carrying and movement of the clamp.

[0017] Since the multi-station cam 9 is relatively thin, it is easy for the multi-station cam 9 to be skewed after being fixedly installed with the rotating shaft 4. The multi-station cam 9 is coaxially and integrally provided with a reinforcing guide sleeve 91. The reinforcing guide sleeve 91 can improve the coaxiality of the multi-station cam 9 and the rotating shaft 4 after they are installed and fixed, thereby improving its stability in use. The multi-station cam 9 is provided with various raised stations in a circular array.

[0018] A first guide sleeve is fixedly installed on the top of the clamp base 1, and the connecting rod 7 is slidably installed in the first guide sleeve. The first guide sleeve improves the straightness of the connecting rod 7 when it moves up and down.

[0019] When the pipe 10 is subjected to the annular array hole opening processing, the pipe 10 is first placed on the two first lifting wheels 21 and the two second lifting wheels 31. At this time, the non-raised position of the multi-station cam 9 contacts the support plate 8, and the clamping block 6 is pushed upward by the elastic force of the spring 71. The clamping block 6 does not contact the pipe 10. The drive motor 5 is started to drive the rotating shaft 4, the drive wheel 32, and the multi-station cam 9 to rotate. After the highest point of the station protrusion of the multi-station cam 9 contacts the support plate 8, the arc-shaped slot of the clamping block 6 is buckled on the pipe. 10, after the pressure sensor reaches the maximum preset value, it sends an electrical signal to the control module, and the control module controls the drive motor 5 to stop rotating. At this time, the clamping block 6 presses and fixes the pipe 10 on the two first lifting wheels 21 and the two second lifting wheels 31. When the multi-station cam 9 rotates with the rotating shaft 4, it drives one of the second lifting wheels 31 to rotate synchronously. The synchronously rotating second lifting wheel 31 drives the pipe 10 to rotate synchronously. After the clamping block 6 presses and fixes the pipe 10, the processing operation of the annular array feature can be carried out.

Claims

1. An automatic rotating clamp for machining pipes on machine tools, characterized in that: The invention comprises a clamp base (1), a first wheel bracket (2), a first lifting wheel (21), a second wheel bracket (3), a second lifting wheel (31), a driving wheel (32), a rotating shaft (4), a driving motor (5), a pressing block (6), a connecting rod (7), a spring (71), a supporting plate (8) and a multi-station cam (9), wherein the first wheel bracket (2) and the second wheel bracket (3) are both fixedly mounted on the clamp base (1), the two first lifting wheels (21) are fixedly mounted on the first wheel bracket (2), the two second lifting wheels (31) are fixedly mounted on the second wheel bracket (3), the two ends of the rotating shaft (4) are rotatably mounted on the clamp base (1) and the second wheel bracket (3), the driving motor (5) is fixedly mounted on the clamp base (1), and the right end of the rotating shaft (4) is connected to the driving motor (5). The output shaft of the motor (5) is connected in a transmission manner, the driving wheel (32) and the multi-station cam (9) are both fixedly sleeved and mounted on the rotating shaft (4), the driving wheel (32) is in transmission contact with the bottom of one of the second lifting wheels (31), four connecting rods (7) are slidably mounted on the clamp base (1) in a rectangular distribution, the clamp block (6) and the support plate (8) are respectively fixedly mounted on the upper and lower ends of the connecting rod (7), the spring (71) is sleeved and mounted on the connecting rod (7), the upper and lower ends of the spring (71) act on the clamp block (6) and the clamp base (1) respectively, the clamp block (6) is provided with an arc-shaped slot matching the pipe (10), a pressure sensor is fixedly mounted in the arc-shaped slot, and the pressure sensor and the driving motor are respectively connected to the control module by circuits.

2. The automatic rotating clamp for machining pipes according to claim 1, characterized in that: An anti-slip rubber sleeve is fixedly sleeved and mounted on the driving wheel (32).

3. The automatic rotating clamp for machining pipes according to claim 1, characterized in that: Handles (11) are fixedly provided on both sides of the clamp base (1).

4. The automatic rotating clamp for machining pipes according to claim 1, characterized in that: A reinforcing guide sleeve (91) is coaxially and integrally formed on the multi-station cam (9).

5. The automatic rotating clamp for machining pipes on machine tools according to claim 1, characterized in that: A first guide sleeve is fixedly mounted on the top of the clamp base (1), and the connecting rod (7) is slidably mounted in the first guide sleeve.

Images