A cutting-off device for ball screw production

Abstract

The utility model belongs to the production field of ball screw, specifically is a kind of cutting device for ball screw production, including work bench, the top of work bench is provided with movable position cutting machine, the top of work bench is provided with driving mechanism, positioning mechanism is provided on driving mechanism;Through the structural design of mounting block, threaded rod, threaded cylinder, connecting rod, support plate and clamping plate, the spacing of clamping can be adjusted, and the adjustment accuracy is higher, whether it is standard specification or non-standard size ball screw, better fitting clamping can be realized through adjustment, avoid the situation that clamping is too loose screw rod shakes or too tight screw rod deforms, adopt symmetrical double-station layout, the synchronous positioning and clamping of two ball screws can be realized simultaneously, matched with synchronous cutting, make the processing capacity of single cutting operation doubled, in batch production, effectively reduce the standby time of equipment and auxiliary operation time, the overall cutting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ball screw production, specifically a cutting device for ball screw production. Background Technology

[0002] In the mass production process of ball screws, the cutting process is a crucial step in dividing the continuously rolled long strip of screw blank into several segments according to a preset length, directly affecting the accuracy and efficiency of subsequent finishing. To meet the production needs of ball screws of different specifications, existing cutting devices are usually equipped with adjustable clamping and positioning mechanisms. By changing the relative position of the clamping components, they can adapt to the positioning of screws of different lengths. A Chinese utility model patent (publication number: CN220783210U) discloses a screw processing cutting device that can easily cut the screw at any position and can achieve fixed-length cutting, thus facilitating the cutting operation of screw processing.

[0003] However, the above-mentioned device still has some shortcomings in use. Specifically, when adjusting the clamping distance by using bolts and screw holes, the distance between the screw holes is a fixed value (usually 5-10mm), which causes the adjustment of the clamping distance to be a step-like change, making it impossible to achieve continuous and precise adjustment. For non-standard lengths or screws with small diameter tolerances, it is difficult to find a perfectly matching screw hole position, which can easily lead to situations where the clamping is too loose (with gaps) or too tight (the screw is deformed under pressure). This not only affects the positioning accuracy but may also cause damage to the screw surface due to uneven clamping force. Therefore, a cutting device for ball screw production is proposed to address the above issues. Utility Model Content

[0004] To address the limitations of existing technologies in achieving continuous and precise adjustment, and the difficulty in finding perfectly matching screw hole positions for non-standard lengths or screws with small diameter tolerances, which can easily lead to problems such as clamping being too loose (with gaps) or too tight (deformation of the screw under pressure), this invention proposes a cutting device for ball screw production.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a cutting device for ball screw production, including a worktable, and a cutting machine with a movable position is provided on the top of the worktable.

[0006] The top of the workbench is provided with a drive mechanism, and the drive mechanism is provided with a positioning mechanism. There are two positioning mechanisms, which can move relative to each other along the horizontal direction of the drive mechanism.

[0007] The positioning mechanism includes a movable base, a mounting block fixed to the top of the movable base, a rectangular groove on the mounting block, and hollow grooves connecting the rectangular groove on both sides of the movable base. A threaded rod is rotatably attached to the bottom surface of the inner wall of the rectangular groove, and a knob is fixed after the threaded rod passes through the rectangular groove.

[0008] The outer wall of the threaded rod is threaded with a threaded cylinder, and both ends of the threaded cylinder are hinged with connecting rods. Both sides of the mounting block are fixed with support plates, and one end of the support plate is fixed with a stop block. The support plate is provided with a sliding groove, and a T-shaped slider slides on the sliding groove. A clamping plate is fixed on the T-shaped slider, and the end of the connecting rod away from the threaded cylinder is hinged to the support plate.

[0009] Preferably, the top of the workbench is fixed with a support frame, which consists of four columns fixed to the workbench and a cover plate fixed to the top of the four columns.

[0010] Preferably, a three-axis linear module is fixed to the bottom of the support frame cover plate, and a cutting machine is fixed to the Z-axis moving end of the three-axis linear module.

[0011] Preferably, the driving mechanism includes an inverted plate fixed at both ends of the top of the worktable, wherein a bidirectional lead screw is rotatably mounted at both ends of one of the inverted plates, and a driving source is externally connected to one end of the bidirectional lead screw that extends out of the inverted plate; and guide rods are fixed at both ends of the other inverted plate.

[0012] Preferably, the movable seat is shaped like an inverted "U". The two ends of the movable seat are respectively provided with a screw hole and a round hole. The screw hole is threaded with a bidirectional lead screw, and the round hole is clearance-fitted with a guide rod. The screw holes on the two movable seats have opposite thread directions.

[0013] Preferably, the top of the mounting block has a through hole with a connected rectangular groove, and a knob is rotated on the through hole. The cross-sectional projection of the knob is "T" shaped, and the knob passes through the through hole and is fixedly connected to one end of the threaded rod.

[0014] Preferably, the connecting rod includes a first rod body and a second rod body, which are rotatably connected.

[0015] Preferably, the outer surfaces of the support plate, the stop block and the clamping plate are all provided with rubber pads, and the rubber pads are provided with anti-slip textures.

[0016] The advantages of this utility model are: 1. This utility model, through its structural design of mounting block, threaded rod, threaded cylinder, connecting rod, support plate, and clamping plate, allows for adjustment of the clamping spacing with higher precision. Whether the ball screw is of standard or non-standard size, better clamping can be achieved through adjustment, avoiding situations where the screw wobbles due to excessive looseness or deforms due to excessive tightness. This significantly improves the device's adaptability to screws of different diameters and lengths. Furthermore, the symmetrical dual-station layout allows for simultaneous positioning and clamping of two ball screws, which, combined with synchronous cutting, doubles the throughput of a single cutting operation. In mass production, this effectively reduces equipment downtime and auxiliary operation time, improving overall cutting efficiency. 2. This utility model achieves synchronous adjustment of the distance between the two positioning mechanisms through the structural design of the C-shaped plate, the bidirectional lead screw and the moving seat. During the cutting process, the positioning mechanism can always maintain a stable clamping force, effectively resist the displacement caused by cutting vibration, and ensure that the lead screw positioning reference does not deviate. It fundamentally solves the problems of cutting surface tilt and length deviation caused by loose clamping blocks in the prior art, and significantly improves the cutting accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cutting device of this utility model; Figure 2 This is a schematic diagram of the top structure of the workbench of this utility model; Figure 3 This is a schematic diagram of the positioning mechanism of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the clamping plate of this utility model; Figure 5 This is a schematic diagram of the mounting block of this utility model.

[0019] In the diagram: 1. Workbench; 2. Support frame; 20. Three-axis linear module; 21. Cutting machine; 3. Drive mechanism; 30. C-shaped plate; 31. Two-way lead screw; 32. Guide rod; 4. Positioning mechanism; 40. Moving seat; 41. Mounting block; 410. Rectangular groove; 411. Perforation; 412. Hollowed-out groove; 42. Threaded rod; 43. Threaded cylinder; 44. Connecting rod; 45. Support plate; 450. Stop block; 451. Slide groove; 46. T-shaped slider; 47. Clamping plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. This application discloses a cutting device for ball screw production. (Refer to...) Figures 1-5 A cutting device for ball screw production includes a worktable 1, on the top of which a cutting machine 21 with a movable position is provided.

[0022] The top of the workbench 1 is equipped with a drive mechanism 3, and the drive mechanism 3 is equipped with a positioning mechanism 4. There are two positioning mechanisms 4, which can move relative to each other along the horizontal direction of the drive mechanism 3.

[0023] The positioning mechanism 4 includes a movable seat 40, a mounting block 41 fixed on the top of the movable seat 40, a rectangular groove 410 opened on the mounting block 41, and hollow grooves 412 connecting the rectangular groove 410 opened on both sides of the movable seat 40. A threaded rod 42 is rotatably provided on the bottom surface of the inner wall of the rectangular groove 410, and a knob is fixed after the threaded rod 42 passes through the rectangular groove 410.

[0024] The outer wall of the threaded rod 42 is threaded with a threaded cylinder 43. Both ends of the threaded cylinder 43 are hinged with connecting rods 44. Both sides of the mounting block 41 are fixed with support plates 45. One end of the support plate 45 is fixed with a stop block 450. The support plate 45 has a sliding groove 451. A T-shaped slider 46 slides on the sliding groove 451. A clamping plate 47 is fixed on the T-shaped slider 46. The end of the connecting rod 44 away from the threaded cylinder 43 passes through the hollow groove 412 and is hinged to the support plate 45.

[0025] Reference Figure 1 The top of the workbench 1 is fixed with a support frame 2, which consists of four columns fixed on the workbench 1 and a cover plate fixed on the top of the four columns.

[0026] Reference Figure 1 A three-axis linear module 20 is fixed at the bottom of the cover plate of the support frame 2. A cutting machine 21 is fixed on the Z-axis moving end of the three-axis linear module 20. The X and Y axes of the three-axis linear module 20 are driven by ball screws, and the Z-axis is driven by a servo electric cylinder. The cutting machine 21 is a high-frequency metal circular saw. Both the three-axis linear module 20 and the circular saw are existing technologies and will not be described in detail here. Reference Figure 1 and Figure 2 The drive mechanism 3 includes a C-shaped plate 30 fixed at both ends of the top of the workbench 1. One C-shaped plate 30 has a bidirectional lead screw 31 rotatably mounted at both ends. The bidirectional lead screw 31 passes through one end of the C-shaped plate 30 and is connected to a drive source. The other C-shaped plate 30 has guide rods 32 fixed at both ends.

[0027] The bidirectional lead screw 31 is a ball screw with a precision grade of C3. The effective stroke is designed according to the maximum machining length. Both ends are connected to the U-shaped plate 30 through bearings. The bearing housing adopts a split structure for easy maintenance. The drive source adopts a servo motor with a planetary reducer with a reduction ratio of 5:1. It is connected to the bidirectional lead screw 31 through a flexible coupling to ensure backlash-free transmission. The guide rod 32 is made of 40Cr material and has been quenched to achieve a surface roughness of Ra0.8μm. The clearance between the guide rod and the round hole of the moving seat 40 is controlled within 0.01-0.03mm.

[0028] Reference Figure 3 The movable seat 40 is shaped like an inverted "U". The two ends of the movable seat 40 are respectively provided with screw holes and round holes. The screw holes are threaded to the bidirectional lead screw 31, and the round holes are clearance-fitted to the guide rod 32. The screw holes on the two movable seats 40 have opposite thread directions.

[0029] Reference Figure 3 , Figure 4 and Figure 5 The top of the mounting block 41 has a through hole 411 that connects to the rectangular groove 410. A knob is rotated on the through hole 411. The cross-sectional projection of the knob is "T" shaped. The knob passes through the through hole 411 and is fixedly connected to one end of the threaded rod 42.

[0030] Reference Figure 4 The connecting rod 44 includes a first rod body and a second rod body, which are rotatably connected by a pivot.

[0031] Reference Figure 3 and Figure 4 The outer surfaces of the support plate 45, the stop block 450 and the clamping plate 47 are all provided with rubber pads, and anti-slip patterns are formed on the rubber pads. The clamping surfaces of the stop block 450 and the clamping plate 47 can be designed as V-shaped structures according to the common screw diameter, with an opening angle of 90°. The rubber pads are made of nitrile rubber with a Shore hardness of 60°, which is bonded to the metal surface through a vulcanization process. The anti-slip patterns are in the form of a diamond grid.

[0032] Working principle: When ball screws of different lengths need to be processed, the servo motor of the drive mechanism 3 starts and drives the bidirectional screw 31 to rotate through the reducer. Since the two moving seats 40 are respectively engaged with the positive and negative thread sections of the bidirectional screw 31 and cannot rotate under the constraint of the guide rod 2, they will make synchronous reverse movements in the horizontal direction to realize the adjustment of the distance between the two positioning mechanisms 4. The two ball screws to be processed are placed on the top of the support plates 45 of the two positioning mechanisms 4, so that one end of the screw is in contact with the stop block 450. The knob on the top of the threaded rod 42 is rotated, which drives the threaded cylinder 43 to move downward along the rectangular groove 410. When the threaded cylinder 43 descends, it pushes the T-shaped sliders 46 on both sides to move towards each other along the slide groove 451 through the connecting rod 44, so that the V-shaped surfaces of the two clamping plates 47 gradually approach the screw. When the rubber pad is in close contact with the surface of the screw, the knob is stopped. At this time, the screw is fully positioned under the combined action of the V-shaped clamping surface and the stop block 450. Since the connecting rod 44 adopts a hinge structure, it can automatically adapt to the clamping requirements of screws of different diameters.

[0033] After positioning is completed, the three-axis linear module 20 is started. The X and Y axes drive the cutting machine 21 to the cutting position, and the Z axis drives the cutting machine 21 to descend. At the same time, the saw blade rotates at high speed to cut the lead screw.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cutting device for ball screw production, comprising a worktable (1), wherein a cutting machine (21) with a movable position is provided on the top of the worktable (1), characterized in that: The top of the workbench (1) is provided with a drive mechanism (3), and the drive mechanism (3) is provided with a positioning mechanism (4). There are two positioning mechanisms (4), which can move relative to each other along the horizontal direction of the drive mechanism (3). The positioning mechanism (4) includes a movable seat (40), a mounting block (41) is fixed on the top of the movable seat (40), a rectangular groove (410) is provided on the mounting block (41), and hollow grooves (412) connecting the rectangular groove (410) are provided on both sides of the movable seat (40). A threaded rod (42) is rotatably provided on the bottom surface of the inner wall of the rectangular groove (410), and a knob is fixed after the threaded rod (42) passes through the rectangular groove (410). The threaded rod (42) has a threaded sleeve (43) threaded to its outer wall. Both ends of the threaded sleeve (43) are hinged to connecting rods (44). Both sides of the mounting block (41) are fixed with support plates (45). One end of the support plate (45) is fixed with a stop block (450). The support plate (45) has a groove (451). A T-shaped slider (46) slides on the groove (451). A clamping plate (47) is fixed on the T-shaped slider (46). The end of the connecting rod (44) away from the threaded sleeve (43) is hinged to the support plate (45).

2. The cutting device for ball screw production according to claim 1, characterized in that: The top of the workbench (1) is fixed with a support frame (2), which consists of four columns fixed on the workbench (1) and a cover plate fixed on the top of the four columns.

3. The cutting device for ball screw production according to claim 2, characterized in that: The bottom of the cover plate of the support frame (2) is fixed with a three-axis linear module (20), and a cutting machine (21) is fixed on the Z-axis moving end of the three-axis linear module (20).

4. The cutting device for ball screw production according to claim 1, characterized in that: The drive mechanism (3) includes an inverted plate (30) fixed at both ends of the top of the workbench (1). One of the inverted plates (30) is rotatably mounted with a two-way lead screw (31) at both ends. The two-way lead screw (31) passes through one end of the inverted plate (30) and is connected to a drive source. The other inverted plate (30) is fixed with a guide rod (32) at both ends.

5. A cutting device for ball screw production according to claim 1 or 4, characterized in that: The movable seat (40) is shaped like an inverted "U". The two ends of the movable seat (40) are respectively provided with screw holes and round holes. The screw holes are threadedly engaged with the bidirectional lead screw (31), and the round holes are clearance-fitted with the guide rod (32). The screw holes on the two movable seats (40) have opposite thread directions.

6. The cutting device for ball screw production according to claim 1, characterized in that: The top of the mounting block (41) has a through hole (411) that connects to the rectangular groove (410). A knob is rotated on the through hole (411). The cross-sectional projection of the knob is "T" shaped. The knob passes through the through hole (411) and is fixedly connected to one end of the threaded rod (42).

7. The cutting device for ball screw production according to claim 1, characterized in that: The connecting rod (44) includes a first rod body and a second rod body, which are rotatably connected.

8. A cutting device for ball screw production according to claim 1, characterized in that: The outer surfaces of the support plate (45), the stop block (450) and the clamping plate (47) are all provided with rubber pads, and the rubber pads are provided with anti-slip patterns.

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