A CNC tool turret

Abstract

The present invention belongs to the technical field of CNC machining equipment, and specifically relates to a CNC tool turret, comprising a central axis kit and a turntable with a tool holder, wherein a spring reset plate is installed on the tool holder, and further comprising: a balancing frame, wherein the balancing frame is annular and is fixed to the outer ring of the turntable by a connecting rod; a slider is installed on the balancing frame, and the number of the sliders is greater than one. When the punch press changes the tool and the turntable rotates, several sliders on the outer ring will slide and deflect to varying degrees according to different rotation conditions of the turntable, and under the influence of centrifugal inertia, the turntable as a whole will tend to rotational balance, thereby keeping the center of mass of the turntable as a whole at the axis of rotation to achieve the effect of maintaining balance, thereby reducing the possibility of dislocation caused by the rotation of the turntable. Compared with a CNC punch press that does not have a balancing device, the frequency of manual adjustment of the turntable position can be reduced, thereby improving production and processing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of numerical control processing equipment, and in particular relates to a numerical control tool turret. Background Art

[0002] The CNC turret punch press is a type of pressure processing equipment. It is also the most dynamic front-end product among pressure processing equipment, integrating mechanics, electricity, and hydraulics. It is mostly used in the processing of various types of thin metal parts, and is a key sheet metal processing equipment that automatically completes a variety of complex hole shapes and shallow deep drawing in one go. Computer programming can accurately locate the horizontal and vertical coordinates of the sheet metal, automatically select the molds required for the processing process according to the program to complete the processing of the sheet metal, and automatically complete holes of different sizes, hole spacing, and shapes. In addition to one-time forming, smaller dies can also be used to punch out larger circular holes, square holes, elliptical holes, and other curved contours of various shapes in a step-punching manner. Special processing techniques such as shutters, shallow drawing, dents, flanging holes, reinforcing ribs, step-punching, step-bending, stamping, and marking holes can also be performed.

[0003] The turntable of a CNC turret punch press is the core component of the press. Under the action of the forces of rotation and blanking cycles, the turntable generates rotational and longitudinal vibrations. The unbalanced inertial force of large rotating castings is the fundamental cause of vibration in rotating machinery. If the turntable has eccentric mass and position errors (caused by material unevenness, processing errors, assembly errors, etc.), it will inevitably generate centrifugal inertial forces. When the rotational speed of the shaft reaches a certain value, the turntable will generate rotational vibration. Since the upper and lower turntables are not on the same axis, the eccentric mass and position of the two turntables are different. Therefore, when the upper and lower turntables rotate simultaneously, due to the inconsistent vibration of the upper and lower turntables, the punch of the upper turntable and the die of the lower turntable cannot fit well, seriously affecting the accuracy of blanking and stretching.

[0004] The turntable of existing CNC turret punch presses usually does not have a rotational balancing system. The centrifugal inertia force generated by eccentric mass or position error can cause rotational vibration, which leads to turntable misalignment. Manual adjustment is required to maintain accuracy, which brings inconvenience to production and processing.

[0005] In view of this, the present invention is proposed to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a CNC tool turret. The specific problem to be solved by the present invention is that the turntable of the existing CNC turret punch press usually does not have a rotational balancing system. The centrifugal inertia force generated by eccentric mass or position error will cause rotational vibration, which will cause the turntable to be misaligned. Manual adjustment is required in time to maintain accuracy, which brings inconvenience to production and processing.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A numerically controlled tool turret comprises a central axis kit and a turntable having a tool holder, wherein a spring return plate is mounted on the tool holder, and further comprises:

[0009] A balance frame, which is annular and fixed to the outer ring of the turntable through a connecting rod;

[0010] The balancing frame is provided with a slider, and the number of the slider is greater than one.

[0011] Preferably, buffer pads are fixedly connected to both ends of the slider.

[0012] Preferably, the buffer pad is made of hard cotton material.

[0013] Preferably, a fixing frame is installed in the slider, and balls are installed on the fixing frame, and the slider is slidably connected to the balance frame through the balls.

[0014] Preferably, the turntable is provided with strip grooves equidistantly and evenly spaced along the diameter direction, and the number of the strip grooves is an even number;

[0015] A counterweight block is installed in the strip-shaped groove, and two ends of the counterweight block are fixedly connected to the bottom surfaces of the two ends of the strip-shaped groove through springs.

[0016] Preferably, the turntable is provided with an annular groove concentric with the central shaft assembly;

[0017] A balancing ring with uniform thickness is installed in the annular groove, and the balancing ring is slidably connected to the annular groove.

[0018] Preferably, the ring width of the balance ring is smaller than the diameter of the annular groove, and the annular groove is filled with lubricating oil.

[0019] Preferably, the balance ring is divided into a counterweight section and a connecting section, and the counterweight section divides the balance ring into three equal parts.

[0020] Preferably, the counterweight segment is made of lead-based alloy, and the connecting segment is made of titanium alloy.

[0021] Preferably, a floating cover structure is provided above the annular groove.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention installs a balancing frame on the outer ring of the turntable and arranges sliders on the balancing frame. When the punch press changes the tool and the turntable rotates, the sliders on the outer ring will slide and deflect to varying degrees according to the different rotation conditions of the turntable. Under the influence of centrifugal inertia, the turntable as a whole will tend to rotate in balance, thereby keeping the center of mass of the turntable as a whole at the axis of rotation to achieve the effect of maintaining balance, thereby reducing the possibility of dislocation caused by the rotation of the turntable. Compared with CNC punch presses without a balancing device, the frequency of manual adjustment of the turntable position can be reduced, thereby improving production and processing efficiency.

[0024] 2. In addition to the arrangement of the balance frame and the slider, the present invention also provides a strip groove on the turntable to achieve a dual balancing effect. In addition, the present invention also provides a balance ring structure inside the turntable. On the one hand, it can reduce the impact force caused by the turntable itself stopping, and on the other hand, it can also reduce the impact force caused by the collision between the slider and the balance frame on the balance of the turntable, thereby further ensuring the balance of the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a visual diagram of the present invention;

[0026] Figure 2 It is the front view of the present invention;

[0027] Figure 3 A top view of the present invention;

[0028] Figure 4 For the present invention Figure 3 A cross-sectional view of section AA;

[0029] Figure 5 A visual diagram of the slider of the present invention;

[0030] Figure 6 It is a left side view of the slider of the present invention;

[0031] Figure 7 For the present invention Figure 6 A cross-sectional view of the BB section;

[0032] Figure 8 It is a top view of the balance ring of the present invention.

[0033] In the figure: the central axis kit 1, the turntable 2, the knife seat 21, the strip groove 22, the counterweight block 221, the annular groove 23, the balance ring 24, the counterweight section 241, the connecting section 242, the floating cover 25, the spring return plate 3, the balance frame 4, the connecting rod 41, the slider 42, the fixing frame 421, the ball 422, and the buffer pad 43. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described 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; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] The embodiment of the present invention provides a CNC tool turret, which solves the technical problem that the centrifugal inertia force generated by the turntable of a CNC turret punch press due to eccentric mass or position error may cause rotational vibration, thereby causing the turntable to be misaligned, requiring manual timely adjustment to maintain accuracy, thereby reducing work efficiency and processing costs.

[0036] The technical solution in the embodiment of the present invention is to solve the above technical problems. The overall idea is as follows: by adding a rotation balancing device to the turntable, the balance of the center of mass of the turntable is ensured when the turntable rotates as a whole, thereby reducing the impact of centrifugal inertia force and ensuring the alignment accuracy of the upper and lower turntables.

[0037] To better understand the technical solution of the present invention, please refer to Figures 1 to 8 In an embodiment of the present invention, a CNC tool turret includes a central axis kit 1 and a turntable 2 having a tool holder 21, a spring return plate 3 is mounted on the tool holder 21, and further includes:

[0038] The balance frame 4 is annular and is fixed to the outer ring of the turntable 2 through a connecting rod 41;

[0039] The balancing frame 4 is provided with a slider 42 , and the number of the slider 42 is greater than one.

[0040] The present invention installs a balancing frame 4 on the outer ring of the turntable 2 and installs a slider 42 on the balancing frame 4. When the punch press changes the tool and the turntable 2 rotates, the several sliders 42 on the outer ring will slide and deviate to varying degrees according to the different rotation conditions of the turntable 2. Under the influence of centrifugal inertia, the turntable 2 as a whole will tend to rotate in balance, thereby keeping the center of mass of the turntable 2 as a whole at the axis of rotation to achieve the effect of maintaining balance, thereby reducing the possibility of dislocation caused by the rotation of the turntable 2. Compared with a CNC punch press that does not have a balancing device, the frequency of manual adjustment of the position of the turntable 2 can be reduced, thereby improving production and processing efficiency.

[0041] As an embodiment of the present invention, buffer pads 43 are fixedly connected to both ends of the slider 42 .

[0042] As an embodiment of the present invention, the buffer pad 43 is made of hard cotton material.

[0043] The slider 42 slides on the balance frame 4. If the buffer pads 43 are not provided at both ends of the slider 42, when the turntable 2 rotates with a large amplitude as a whole, the slider 42 may collide with the connecting rod 41. The impact force of the collision may further cause the turntable 2 to be eccentric, thereby causing the alignment hole to be misaligned. Compared with not providing the buffer pad 43, when the slider 42 with the buffer pad 43 fixed thereto collides with the connecting rod 41, the buffer pad 43 made of hard cotton material will play a buffering role first, thereby reducing the impact of the collision between the slider 42 and the connecting rod 41 on the turntable 2 as a whole, and preventing the turntable 2 from being misaligned due to excessive impact force.

[0044] As an embodiment of the present invention, a fixing frame 421 is installed in the slider 42 , and a ball bearing 422 is installed on the fixing frame 421 . The slider 42 is slidably connected to the balance frame 4 via the ball bearing 422 .

[0045] Ball bearings 422 and a fixing frame 421 are provided in the slider 42, which improves the surface contact into point contact and converts the sliding connection into a rolling connection, thereby reducing the friction between the slider 42 and the balance frame 4, thereby making the slider 42 respond more promptly to the rotation of the turntable 2. On the other hand, it also reduces the wear between the two and increases the service life.

[0046] As an embodiment of the present invention, the turntable 2 has strip grooves 22 uniformly and equidistantly formed inside along the diameter direction, and the number of the strip grooves 22 is an even number;

[0047] A counterweight block 221 is installed in the strip groove 22 , and both ends of the counterweight block 221 are fixedly connected to the inner walls of both ends of the strip groove 22 through springs.

[0048] The strip grooves 22 adopt the principle of a rotating centering device and are preset before the turntable 2 is cast. The number of strip grooves 22 is an even number, and the two opposite strip grooves 22 are located on the same diameter of the turntable 2. When the turntable 2 rotates, the two opposite counterweights 221 will be thrown away from the center of the turntable 2 under the influence of centrifugal inertia. When the turntable 2 stops, the counterweights 221 will return to the center under the action of the spring. The forces generated by the two opposite counterweights 221 are symmetrical relative to the center of the axis position, so they can balance the turntable 2 as a whole.

[0049] As an embodiment of the present invention, an annular groove 23 is provided inside the turntable 2 and is concentric with the central shaft assembly 1;

[0050] A balancing ring 24 with uniform thickness is installed in the annular groove 23 , and the balancing ring 24 is slidably connected to the annular groove 23 .

[0051] When the turntable 2 rotates, the balance ring 24 will gradually rotate with the turntable 2 at a slower angular velocity under the influence of rotational inertia. When the turntable 2 stops, the balance ring 24 will not stop immediately under the influence of inertia, but will continue to rotate for a period of time, which reduces the impact caused by the sudden stop of the turntable 2 to a certain extent and plays a balancing role on the turntable 2 as a whole. On the other hand, the collision between the slider 42 and the balance frame 4 will also generate a certain impact force. The setting of the balance ring 24 can also reduce the impact of this impact force to a certain extent, thereby playing a buffering role.

[0052] As an embodiment of the present invention, the ring width of the balance ring 24 is smaller than the diameter of the annular groove 23 , and the annular groove 23 is filled with lubricating oil.

[0053] Filling the balance ring 24 with lubricating oil can lubricate the rotation of the balance ring 24, thereby improving the mobility of the balance ring 24 and further enhancing the buffering effect. At the same time, the lubricating oil can also reduce friction, thereby increasing the service life of the balance ring 24 and reducing the cost of use.

[0054] As an embodiment of the present invention, the balancing ring 24 is divided into a counterweight section 241 and a connecting section 242 , and the counterweight section 241 divides the balancing ring 24 into three equal parts.

[0055] As an embodiment of the present invention, the connecting section 242 is made of titanium alloy, and the counterweight section 241 is made of lead-based alloy.

[0056] Three counterweight sections 241 are set on the balance ring 24. Compared with an even number of counterweight sections 241, if an even number of counterweight sections 241 is used, the two counterweight sections 241 opposite to each other on the same diameter will balance each other, but there will be a deviation between the balances of the two groups of counterweight sections 241 on different diameters, which will cause imbalance and even further cause vibration of the shaft. However, if three counterweight sections 241 are used, according to the principle of inscribed triangles in a circle, the center of gravity of the three counterweight sections 241 must be located at the center of the circle, which is more likely to play a buffering role when the turntable 2 is subjected to impact force; compared with setting a single counterweight section 241, a single counterweight section 241 will cause the overall center of gravity of the balance ring 24 to be unbalanced, so the use of three counterweight sections 241 can better maintain the overall self-balance of the balance ring 24, thereby maintaining the overall balance of the turntable 2; compared with an odd number of counterweights of more than five, the weight gradient of the entire balance ring 24 is clearer, making it easier for the balance ring 24 to rotate when subjected to impact force, thereby playing a buffering role.

[0057] As an embodiment of the present invention, a floating cover 25 structure is provided above the annular groove 23 .

[0058] The floating cover 25 is an annular structure with the same size as the sliding groove. After the lubricating oil is added, the floating cover 25 is placed on the annular groove 23, which can prevent the lubricating oil from splashing out. At the same time, it can also prevent dust from falling into the lubricating oil and causing impurity contamination. Under the combined action of gravity and the buoyancy of the lubricating oil, the floating cover 25 remains floating on the lubricating oil. When the turntable 2 rotates, the floating cover 25 can play the same role as the balance ring 24 and provide a buffer for the turntable 2.

[0059] Working principle: When the punch press changes the tool and the turntable 2 rotates, the several sliders 42 of the outer ring will slide and deflect to varying degrees according to the different rotation conditions of the turntable 2, and under the influence of centrifugal inertia, the turntable 2 as a whole will tend to rotational balance, thereby keeping the center of mass of the turntable 2 as a whole at the axis of rotation to achieve the effect of maintaining balance; the strip grooves 22 opened on the turntable 2 adopt the principle of a rotary centering device, which is preset before the turntable 2 is cast. The number of strip grooves 22 is an even number, and the two opposite strip grooves 22 are located on the same diameter of the turntable 2. When the turntable 2 rotates, the two opposite counterweights 221 will be thrown away from the center of the turntable 2 under the influence of centrifugal inertia. When the turntable 2 stops, the counterweights 221 will return to the center under the action of the spring. The forces generated by the two opposite counterweights 221 are symmetrical relative to the center of the axis, so they can balance the turntable 2 as a whole; after filling with lubricating oil The floating cover 25 is placed on the annular groove 23, which can prevent the lubricating oil from splashing out, and at the same time prevent dust from falling into the lubricating oil and causing impurity pollution. Under the combined action of gravity and the buoyancy of the lubricating oil, the floating cover 25 remains floating on the lubricating oil. When the turntable 2 rotates, the balance ring 24 will gradually rotate with the turntable 2 and produce a slower angular velocity under the influence of rotational inertia. When the turntable 2 stops, the balance ring 24 will not stop immediately under the influence of inertia, but will continue to rotate for a period of time, which reduces the impact caused by the sudden stop of the turntable 2 to a certain extent and plays a balancing role on the turntable 2 as a whole; on the other hand, the collision of the slider 42 and the balance frame 4 will also generate a certain impact force. The setting of the balance ring 24 can also reduce the impact of this impact force to a certain extent, thereby playing a buffering role. The floating cover 25 can also play the same role as the balance ring 24 and buffer the turntable 2.

[0060] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not exist, the above embodiments only express several implementation methods of the present invention. The description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, several variations and improvements can be made, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention should be based on the attached claims.

Claims

1. A CNC tool turret, comprising a center axis kit (1) and a turntable (2) having a tool holder (21), wherein a spring return plate (3) is mounted on the tool holder (21), characterized in that: Also includes: A balancing frame (4), the balancing frame (4) is annular and is fixed to the outer ring of the turntable (2) via a connecting rod (41); A slider (42) is mounted on the balancing frame (4), and the number of the slider (42) is greater than one; Buffer pads (43) are fixedly connected to both ends of the slider (42); the buffer pads (43) are made of hard cotton material; A fixing frame (421) is installed in the slider (42), a ball bearing (422) is installed on the fixing frame (421), and the slider (42) is slidably connected to the balance frame (4) via the ball bearing (422); The turntable (2) is provided with an annular groove (23) which is concentric with the central shaft assembly (1); A balancing ring (24) with uniform thickness is installed in the annular groove (23), and the balancing ring (24) is slidably connected to the annular groove (23); the ring width of the balancing ring (24) is smaller than the diameter of the annular groove (23), and the annular groove (23) is filled with lubricating oil; The balancing ring (24) is divided into a counterweight section (241) and a connecting section (242), and the counterweight section (241) divides the balancing ring (24) into three equal parts; a floating cover (25) structure is provided above the annular groove (23).

2. The CNC tool turret according to claim 1, characterized in that: The turntable (2) is provided with strip grooves (22) at equal intervals along the diameter direction, and the number of the strip grooves (22) is an even number; A counterweight block (221) is installed in the strip-shaped groove (22), and two ends of the counterweight block (221) are fixedly connected to the bottom surfaces of both ends of the strip-shaped groove (22) through springs.

3. The CNC tool turret according to claim 1, characterized in that: The counterweight section (241) is made of a lead-based alloy, and the connecting section (242) is made of a titanium alloy.

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