Numerical control machining quick-change clamp for high-precision thin-wall rotary part

Abstract

The utility model belongs to the technical field of rotary part machining, and particularly discloses a numerical control machining quick-change clamp for a high-precision thin-wall rotary part, which comprises an external connection seat and a clamp main body, fixing plates are fixedly connected to four corners of the external connection seat, two groups of sliding grooves are symmetrically formed in one side of the external connection seat, and sliding blocks are slidably connected in the sliding grooves; limiting plates are fixedly connected to the outer walls of the two sides of the sliding block, connecting rods are rotationally connected to the two sides of each limiting plate, transverse rods are fixedly connected between the connecting rods, the positions between the transverse rods and the connecting rods are U-shaped, the clamp body is arranged above the external connection base, grooves are formed in the two sides of the clamp body, and the transverse rods are connected with the corresponding grooves in a clamped mode. And the cross rod can rotate circumferentially along with the joint of the connecting rod and the sliding block to be clamped into the groove, so that the external connecting seat and the clamp main body are connected into a whole, and therefore, the quick change device is simple and compact in structure, the connection between the clamp and the numerical control bed is quickly completed in a clamping manner, and the clamp change efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary part processing, and specifically relates to a set of numerical control processing quick-change fixture for high-precision thin-walled rotary parts. Background Technique

[0002] Rotary parts refer to components that can rotate around a central axis. These parts are usually made of cast steel or cast iron, and their sizes and shapes depend on their required mechanical properties. Rotary parts are usually used as rotating components in various industrial equipment, such as drilling rigs, excavators, ships, etc. At the same time, rotary parts have the advantages of large load-bearing capacity, stable rotation, and long service life. When performing operations such as drilling and grinding on rotary parts, a numerical control lathe is required.

[0003] According to the publication number CN219598581U, a fixture quick-change device is disclosed. On the upper surface of its bottom plate and along its length direction, there are a first chute with an inner wall rotatably connected to a first bidirectional lead screw and a second chute with an inner wall rotatably connected to a second bidirectional lead screw. Both the first bidirectional lead screw and the second bidirectional lead screw are threadedly connected to a first slider. At least one first limit head is fixedly installed on the top of the first slider. A driving mechanism is in transmission connection with the first bidirectional lead screw and the second bidirectional lead screw. On the left and right sides of the middle part of the bottom plate, there is a fixing plate with a third chute. A reciprocating lead screw is rotatably connected between the inner walls of the third chute. The reciprocating lead screw is threadedly connected to a second slider. At least one second limit head is arranged on the opposite sides of the two second sliders. The fixture quick-change device of the utility model, on the basis of realizing the quick disassembly and installation of the fixture, clamps and fixes the fixture bottom plate from two directions, greatly improving the stability of the fixation of the fixture bottom plate.

[0004] In the above case, the fixture bottom plate is clamped and fixed from two directions, greatly improving the stability of the fixation of the fixture bottom plate. However, the applicant believes that the operation steps of the existing fixture quick-change device in the prior art are still a bit cumbersome. It is necessary to rotate different handwheels back and forth to adjust the bottom plates in two directions to adapt to fixtures of different sizes to ensure the insertion of the limit heads. Moreover, the matching transmission structure is complex, and it is also necessary to spend time maintaining the quick-change device in the later stage. Once the transmission structure in the existing quick-change device is damaged, it will not only affect the stability of the fixture but also cause the fixture to be unable to be removed for replacement. Content of the Utility Model

[0005] The purpose of the utility model is to provide a set of numerical control processing quick-change fixture for high-precision thin-walled rotary parts, so as to solve the problems in the prior art that the operation steps of the existing fixture quick-change device are still a bit cumbersome, and it is necessary to rotate different handwheels back and forth to adjust the bottom plates in two directions to adapt to fixtures of different sizes to ensure the insertion of the limit heads, etc.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] A numerical control machining quick-change fixture for high-precision thin-walled rotary parts, including an external connection seat and a fixture main body. Fixed connection plates are fixedly connected to the four corners of the external connection seat. Two groups of sliding grooves are symmetrically opened on one side of the external connection seat. Sliders are slidably connected in the sliding grooves. Limiting plates are fixedly connected to the outer walls on both sides of the sliders. Connecting rods are rotatably connected to both sides of the limiting plates. Cross bars are fixedly connected between the connecting rods. The space between the cross bar and the connecting rod is set in a U shape.

[0008] The fixture main body is arranged above the external connection seat. Grooves are opened on both sides of the fixture main body. The cross bars are respectively clamped with the corresponding grooves.

[0009] As a preferred scheme of the present utility model, anti-slip sleeves are fixedly sleeved on the cross bars. The anti-slip sleeves are made of rubber material.

[0010] As a preferred scheme of the present utility model, a bidirectional screw rod is rotatably connected inside the external connection seat. The bidirectional screw rod horizontally penetrates through the two groups of sliding grooves. The sliders are respectively threadedly connected to one side of the bidirectional screw rod.

[0011] As a preferred scheme of the present utility model, one end of the bidirectional screw rod extends to the outside of the external connection seat, and a handle is coaxially fixedly connected to one end of the bidirectional screw rod.

[0012] As a preferred scheme of the present utility model, two groups of limiting blocks are fixedly connected above the external connection seat. Two groups of limiting grooves are opened below the fixture main body. The two groups of limiting blocks are respectively clamped with the corresponding limiting grooves.

[0013] As a preferred scheme of the present utility model, docking holes are opened on the connecting rods. A positioning bolt is inserted between the docking holes.

[0014] As a preferred scheme of the present utility model, one end of the positioning bolt is fixedly connected with a threaded rod. A nut is threadedly connected to the threaded rod. A plurality of resistance-increasing plates are fixedly connected to the outer wall of the nut at equal circumferential intervals.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] (1) In order to further improve the speed of installation of the quick-change device and the fixture, the external seat is fixedly installed on the CNC machine by the cooperation of the fixing plate and bolts. The sliders can be adjusted to move away from or closer to each other along the slide groove. The stability of the connection between the slider and the external seat can be ensured by the limit plate. The connecting rod and the cross bar are integrally connected and arranged in a U shape. When the sliders move away from each other, the fixture body is installed above the external seat. The cross bar can rotate in a circle along the connection between the connecting rod and the slider and be snapped into the groove, so that the external seat and the fixture body are connected as a whole. Then the sliders move closer to each other to strengthen the limitation of the cross bar, and try to avoid the cross bar from detaching from the groove due to vibration. Therefore, the quick-change device has a simple and compact structure, and the connection between the fixture and the CNC machine is quickly completed by snapping, which effectively improves the efficiency of fixture replacement.

[0017] (2) The positioning bolt passes through the docking hole to connect one side of the connecting rod into one piece, thereby increasing the limitation of the connecting rod and improving the installation firmness of the fixture body. The threaded rod and the positioning bolt are integrally formed. After the nut and the threaded rod are threadedly connected, the connection strength between the two connecting rods can be increased, and the resistance-enhancing plate can increase the contact area between the nut and the connecting rod, thereby minimizing the nut from rotating easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall device of the utility model;

[0019] Figure 2 This is a three-dimensional half-section schematic diagram of the external seat of the utility model

[0020] Figure 3 It is a three-dimensional schematic diagram of the clamp body of the utility model;

[0021] Figure 4 It is a three-dimensional schematic diagram of the positioning bolt and the nut of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1. External seat; 101. Fixed plate; 102. Limit block; 103. Slide groove; 104. Slider; 105. Connecting rod; 106. Cross bar; 107. Anti-slip sleeve; 108. Bidirectional screw; 109. Handle; 110. Docking hole; 111. Limit plate; 2. Clamp body; 201. Limit groove; 202. Recess; 3. Positioning bolt; 301. Threaded rod; 302. Nut; 303. Resistance increasing plate. DETAILED DESCRIPTION

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] Embodiment:

[0027] Please refer to Figures 1 - 4 , a set of quick-change fixture for numerical control machining of high-precision thin-walled rotary parts, including an external connection seat 1 and a fixture main body 2. Fixed plates 101 are fixedly connected to the four corners of the external connection seat 1. Two groups of sliding grooves 103 are symmetrically opened on one side of the external connection seat 1. Sliders 104 are slidably connected in the sliding grooves 103. Limiting plates 111 are fixedly connected to the outer walls on both sides of the slider 104. Connecting rods 105 are rotatably connected to both sides of the limiting plate 111. Cross bars 106 are fixedly connected between the connecting rods 105. The cross bars 106 and the connecting rods 105 are both arranged in a U shape. The fixture main body 2 is arranged above the external connection seat 1. Grooves 202 are opened on both sides of the fixture main body 2. The cross bars 106 are respectively clamped with the corresponding grooves 202. In order to further improve the quickness of the connection between the quick-change device and the fixture, the external connection seat 1 is fixedly installed on the numerical control machine bed through the cooperation of the fixed plate 101 and bolts. The sliders 104 can be adjusted to move away from or close to each other along the sliding grooves 103. The stability of the connection between the slider 104 and the external connection seat 1 can be ensured through the limiting plate 111. The connecting rod 105 and the cross bar 106 are integrally connected and arranged in a U shape. When the sliders 104 move away from each other, the fixture main body 2 is installed above the external connection seat 1. The cross bar 106 can rotate circumferentially with the connection part of the connecting rod 105 and the slider 104 and be clamped into the groove 202, so that the external connection seat 1 and the fixture main body 2 are connected into one body. Subsequently, the sliders 104 move closer to each other to strengthen the limitation of the cross bar 106, and try to prevent the cross bar 106 from disengaging from the groove 202 due to vibration. Therefore, the structure of this quick-change device is simple and compact, and the connection between the fixture and the numerical control machine bed is quickly completed by means of clamping, effectively improving the efficiency of fixture replacement;

[0028] In addition, a rounded corner is provided below the end of the groove 202 to facilitate the cross bar 106 to be easily snapped into the groove 202 when making a circular motion.

[0029] Specifically, the crossbar 106 is fixed with an anti-skid cover 107, which is made of rubber material. The rubber anti-skid cover 107 can improve the friction between the crossbar 106 and the groove 202, and the anti-skid cover 107 can also be made of frosted materials to increase friction.

[0030] Specifically, the internal rotation of the external seat 1 is connected with a bidirectional screw 108, and the bidirectional screw 108 horizontally passes through the two groups of slide grooves 103. The sliders 104 are respectively threadedly connected to one side of the bidirectional screw 108. One end of the bidirectional screw 108 extends to the outside of the external seat 1, and one end of the bidirectional screw 108 is coaxially fixedly connected with a handle 109. The bidirectional screw 108 can be driven to rotate by the handle 109 on the outside of the external seat 1. Since the sliders 104 are respectively threadedly connected to one side of the bidirectional screw 108, the forward or reverse rotation of the bidirectional screw 108 can drive the two groups of sliders 104 to move away from or closer to each other, so as to facilitate the adjustment of the position of the cross bar 106 in the groove 202.

[0031] Specifically, two groups of limit blocks 102 are fixedly connected to the top of the external seat 1, and two groups of limit grooves 201 are opened at the bottom of the clamp body 2. The two groups of limit blocks 102 are respectively engaged with the corresponding limit grooves 201. The limit blocks 102 and the limit grooves 201 are both T-shaped. The clamp body 2 can quickly complete the initial connection with the external seat 1 through the cooperation of the limit blocks 102 and the limit grooves 201.

[0032] Specifically, the connecting rods 105 are each provided with docking holes 110, and positioning bolts 3 are inserted between the docking holes 110. One end of the positioning bolt 3 is fixedly connected to a threaded rod 301, and a nut 302 is threadedly connected to the threaded rod 301. A plurality of resistance-increasing plates 303 are fixedly connected to the outer wall of the nut 302 at equal intervals around the circumference. The positioning bolt 3 passes through the docking hole 110 to connect the connecting rod 105 on one side into one, thereby increasing the limitation of the connecting rod 105 and improving the installation firmness of the clamp body 2. The threaded rod 301 and the positioning bolt 3 are integrally formed, and the nut 302 can increase the connection strength between the two connecting rods 105 after being threadedly connected to the threaded rod 301, and the resistance-increasing plate 303 can increase the contact area between the nut 302 and the connecting rod 105, thereby minimizing the nut 302 from rotating easily.

[0033] Working principle:

[0034] In use, the bidirectional screw 108 can be driven to rotate by the handle 109 on the outside of the external seat 1, so that the two sliders 104 move away from each other, and the cross bars 106 are unfolded with the rotation of the connecting rods 105. The fixture body 2 can be quickly and preliminarily connected to the external seat 1 through the cooperation of the limit block 102 and the limit groove 201. The cross bars 106 can be rotationally engaged with the joints of the connecting rods 105 and the sliders 104 and circumferentially rotated and snapped into the grooves 202, so that the external seat 1 and the fixture body 2 are connected into one body. Then, the handle 109 is reversed to make the sliders 104 approach each other to strengthen the limitation of the cross bars 106, and to prevent the cross bars 106 from disengaging from the grooves 202 due to vibration as much as possible. The positioning bolt 3 passes through the docking hole 110 to connect one side of the connecting rod 105 into one body, increasing the limitation of the connecting rod 105 and also enhancing the installation firmness of the fixture body 2. The threaded rod 301 is integrally formed with the positioning bolt 3. After the nut 302 is threadedly connected to the threaded rod 301, the connection strength between the two connecting rods 105 can be increased, and the resistance-increasing plate 303 can increase the contact area between the nut 302 and the connecting rod 105, so as to prevent the nut 302 from rotating easily. Therefore, the quick-change device has a simple and compact structure, and can quickly complete the connection between the fixture and the numerical control machine tool by means of snap connection, effectively improving the efficiency of fixture replacement.

[0035] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A set of CNC machining quick-change fixtures for high-precision thin-walled rotating parts, comprising an external seat (1) and a fixture body (2), characterized in that: The four corners of the external seat (1) are fixedly connected with a fixed plate (101), one side of the external seat (1) is symmetrically provided with two groups of sliding grooves (103), the sliding grooves (103) are slidably connected with sliders (104), the outer walls on both sides of the sliders (104) are fixedly connected with limit plates (111), both sides of the limit plates (111) are rotatably connected with connecting rods (105), the connecting rods (105) are fixedly connected with cross bars (106), and the cross bars (106) and the connecting rods (105) are arranged in a U shape; The clamp body (2) is arranged above the external seat (1), and grooves (202) are provided on both sides of the clamp body (2), and the cross bars (106) are respectively engaged with the corresponding grooves (202).

2. According to claim 1, a set of CNC machining quick-change fixtures for high-precision thin-walled rotating parts is characterized by: The crossbar (106) is fixedly provided with an anti-slip sleeve (107), and the anti-slip sleeve (107) is made of rubber material.

3. The set of quick-change fixtures for CNC machining of high-precision thin-walled rotating parts according to claim 1 is characterized in that: The external seat (1) is internally rotatably connected with a bidirectional screw (108), the bidirectional screw (108) laterally passes through two groups of slide grooves (103), and the sliders (104) are respectively threadedly connected to one side of the bidirectional screw (108).

4. The set of quick-change fixtures for CNC machining of high-precision thin-walled rotating parts according to claim 3 is characterized in that: One end of the bidirectional screw rod (108) extends to the outside of the external seat (1), and one end of the bidirectional screw rod (108) is coaxially fixedly connected to a handle (109).

5. The set of quick-change fixtures for CNC machining of high-precision thin-walled rotating parts according to claim 1 is characterized in that: Two groups of limit blocks (102) are fixedly connected to the upper part of the external seat (1), and two groups of limit grooves (201) are provided at the lower part of the clamp body (2). The two groups of limit blocks (102) are respectively engaged with the corresponding limit grooves (201).

6. The set of quick-change fixtures for CNC machining of high-precision thin-walled rotating parts according to claim 1 is characterized in that: The connecting rods (105) are each provided with a docking hole (110), and positioning bolts (3) are inserted between the docking holes (110).

7. The set of quick-change fixtures for CNC machining of high-precision thin-walled rotating parts according to claim 6 is characterized in that: One end of the positioning bolt (3) is fixedly connected to a threaded rod (301), a nut (302) is threadedly connected to the threaded rod (301), and a plurality of resistance-enhancing plates (303) are fixedly connected to the outer wall of the nut (302) at equal intervals around the circumference.

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