A CNC machine tool base clamping tool for profile processing

Abstract

The present invention relates to the technical field of clamping tools for CNC machine tool processing, specifically a CNC machine tool base clamping tool for profile processing, including an end chuck and a middle chuck, the end face chuck includes a rotatable disc seat, a movable seat is provided on the disc seat, and a first clamping end and a second clamping end are provided on the movable seat; the middle chuck includes a symmetrically arranged sliding seat, a connecting piece is symmetrically hinged on the sliding seat, a third clamping end and an adjusting piece are hinged on the connecting piece, and an elastic suppression piece is connected between the third clamping end and the connecting piece. The end chuck and the middle chuck used in the present invention cooperate to efficiently and conveniently clamp and fix workpieces of regular tetrahedral deformation, regular hexagonal deformation and regular octagonal structure of different sizes within a certain range, and the overall structure is simple, the stability and reliability of the working process are high, and it has the advantages of wide application range, good stability and high continuous working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of clamping tools for CNC machine tool processing, in particular to a CNC machine tool base clamping tool for profile processing. Background Art

[0002] CNC machine tools for metal profile processing are mechanical equipment that use digital control technology to accurately process metal profiles. They have the advantages of high precision, high efficiency, flexibility and stability. Currently, hollow metal profiles usually have shapes such as quadrilaterals, hexagons and octagons. When CNC machine tools for metal profile processing are operating, the base of the CNC machine tools is usually equipped with clamping tools (referred to as fixtures) to enable the metal profile to be processed to be firmly fixed in the correct position, ensuring the stability and reliability of the processing process, and correspondingly improving the processing quality.

[0003] At present, common clamps can usually only clamp and fix profiles of a single structure. Their scope of use is small, and it is difficult to efficiently meet the processing needs of profiles of different structures. Some clamps that can clamp and fix profiles of more than one structure usually have a more complex structure or a more complex working process, which not only affects the processing efficiency but also has relatively low reliability and stability in long-term work. Summary of the invention

[0004] The present invention provides a CNC machine tool base clamping tool for profile processing to solve the problems in related technologies that the clamps have a relatively single action object, a small application range, a complex structure or a complex working process, and low processing efficiency, long-term working reliability and stability.

[0005] The present invention provides a CNC machine tool base clamping tool for profile processing, the CNC machine tool base clamping tool for profile processing comprises end chucks, the end chucks clamp and fix the workpiece from both ends of the workpiece and can rotate to switch the processing surface of the workpiece; a middle chuck, the middle chuck is located in the area between the end chucks and clamps and fixes the workpiece from both sides, and cooperates with the end chucks to put the workpiece in a stable and precise processing state; the end chuck comprises a rotatable disc seat, a control seat is slidably arranged on the disc seat, the control seats are distributed along the circumference of the disc seat and are rectangular, a first clamping end and a second clamping end are arranged on the control seat, and the first The clamping end and the second clamping end are distributed in sequence from the inside to the outside along the radial direction of the disk seat. The second clamping ends on any two adjacent control seats respectively limit the clamping of two adjacent faces on the regular hexagonal workpiece, and the second clamping ends on the other two control seats limit the clamping of the corresponding two adjacent faces on the regular hexagonal workpiece; the middle clamping head package is symmetrically arranged on a sliding seat, and a connecting piece is symmetrically arranged on the sliding seat, and a third clamping end is hinged on the connecting piece. An elastic suppression piece is connected between the third clamping end and the connecting piece. The elastic suppression piece is symmetrically distributed and located on both sides of the connecting piece. The third clamping end can be adaptively rotated according to the state of the processing surface of the workpiece until its clamping surface fits with the corresponding side of the workpiece.

[0006] In one possible implementation, the connecting member is hinged to the sliding seat, an adjustment seat is slidably connected to the sliding seat, an adjustment member is hinged between the adjustment seat and the connecting member, and the sliding adjustment seat controls the opening angle between the symmetrical connecting members through the adjustment member to control the clamping range of the third clamping end on the symmetrical connecting member, wherein an adjustment screw is threadedly connected to the adjustment seat, and the adjustment screw is rotatably connected to the sliding seat.

[0007] In one possible implementation, a pre-adjustment part is connected to the third clamping end, the pre-adjustment parts are symmetrically distributed and an elastic reset part is connected between the pre-adjustment part and the third clamping end, and the contact mode between the pre-adjustment part and the workpiece is point contact or line contact, and the contact mode between the third clamping end and the workpiece is surface contact. In the process of clamping the workpiece, the pre-adjustment part first contacts the workpiece and preliminarily adjusts the position state of the third clamping end according to the position state of the workpiece.

[0008] In one possible implementation, the pre-adjustment member includes a hinged rod, one end of which is hinged to the third clamping end, and the other end is connected to the contact end, the elastic return member is connected between the hinged rod and the third clamping end, and the elastic force of the elastic return member is greater than the elastic force of the elastic suppression member.

[0009] In a possible implementation, the first clamping end is located on a side of the corresponding second clamping end close to the center of the disc base, and a side of the first clamping end close to the corresponding second clamping end is arc-shaped.

[0010] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The end chuck and the middle chuck used in the present invention cooperate to efficiently and conveniently clamp and fix workpieces of different sizes with regular tetrahedral deformation, regular hexagonal deformation and regular octagonal structure within a certain range, and the overall structure is simple, the stability and reliability of the working process are high, and it has the advantages of wide application range, good stability and high continuous working efficiency.

[0011] 2. The pre-adjusting part used in the present invention cooperates with the third clamping end. During the clamping process, the position state of the third clamping end is pre-adjusted according to the structural state of the workpiece, so that the third clamping end can clamp and fix the workpiece quickly and stably, and effectively avoid the third clamping end damaging the workpiece during the clamping process.

[0012] 3. The present invention utilizes the adjustment seat and the adjustment member to adjust the angle between the connecting members, so as to increase the applicable scope of the middle clamp and further expand the applicable scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the regular hexagonal structural profile before and after processing.

[0014] Figure 2 The present invention is a schematic structural diagram of an end chuck and a middle chuck of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0015] Figure 3 It is a structural schematic diagram of a first clamping end, a second clamping end and a third clamping end of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0016] Figure 4 It is a structural schematic diagram of a workpiece with a regular hexagonal structure clamped and fixed by an end chuck of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0017] Figure 5 It is a structural schematic diagram of a workpiece with a regular quadrilateral structure clamped and fixed by an end chuck of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0018] Figure 6 It is a structural schematic diagram of a workpiece with a regular hexagonal structure clamped and fixed by a middle chuck of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0019] Figure 7 It is a structural schematic diagram of a workpiece with a regular quadrilateral structure clamped and fixed by a middle chuck of a CNC machine tool base clamping tool for profile processing provided by an embodiment of the present invention.

[0020] In the figure: 1. end clamp; 101. disk seat; 102. control seat; 103. first clamping end; 104. second clamping end; 2. workpiece; 3. middle clamp; 31. sliding seat; 32. connecting member; 33. third clamping end; 34. elastic suppression member; 35. adjustment seat; 36. adjustment member; 37. adjustment screw; 38. pre-adjustment member; 381. hinged rod; 382. contact end; 39. elastic reset member. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0022] See also Figure 1 and Figure 2 A CNC machine base clamping tool for profile processing includes an end chuck 1 and a middle chuck 3, both of which are installed on the machine tool, wherein the end chuck 1 clamps and fixes the workpiece 2 from both ends and can rotate the workpiece 2 to switch the processing surface of the workpiece 2, and the middle chuck 3 is located in the area between the end chucks 1 and clamps and fixes the workpiece 2 from both sides in real time, thereby improving the stability of the position state of the workpiece 2. The middle chuck 3 cooperates with the end chuck 1, on the one hand, to ensure that the workpiece 2 is in a stable and precise processing state, and on the other hand, it can be stably and reliably applied to, but not limited to, the clamping and fixing of workpieces 2 with regular quadrilateral, regular hexagonal deformation and regular octagonal structures, and has the advantages of a wide range of applications and good stability.

[0023] See also Figure 1-Figure 5 The end chuck 1 includes a rotatable disc seat 101, on which a control seat 102 is slidably arranged. The control seat 102 is distributed in a rectangular shape along the circumferential direction of the disc seat 101, and the control seat 102 moves synchronously inward or outward. The movement principle is the same as that of a three-jaw chuck. A first clamping end 103 and a second clamping end 104 are arranged on the control seat 102, and the first clamping end 103 and the second clamping end 104 on the control seat 102 are sequentially distributed from inside to outside along the radial direction of the disc seat 101, wherein the first clamping end 103 is used to clamp a workpiece 2 having four rectangularly distributed sides, such as a regular quadrilateral structure or a regular octagonal structure, such as Figure 5As shown, the control seat 102 can be controlled to move inward or outward synchronously to control the first clamping end 103 to clamp and fix the workpiece 2 with a regular quadrilateral structure. The clamping and fixing of the regular octagon is the same as the above process; the second clamping end 104 is used to clamp and fix the workpiece 2 with a regular hexagonal structure, such as Figure 4 As shown, the second clamping ends 104 on two adjacent control seats 102 respectively limit and clamp two adjacent faces on the regular hexagonal workpiece 2, and the other two second clamping ends 104 correspondingly limit and clamp two adjacent faces. The control seats 102 can move inward or outward synchronously to control the second clamping ends 104 to clamp and fix the workpiece 2 with a regular hexagonal structure, wherein the first clamping end 103 has an arc-shaped structure on one side close to the corresponding second clamping end 104, thereby fully increasing the space between the first clamping end 103 and the second clamping end 104, so as to facilitate the clamping and fixation of workpieces 2 with different structures.

[0024] See also Figure 2-Figure 7 The middle clamp 3 includes a sliding seat 31 symmetrically arranged front and back, a connecting piece 32 symmetrically arranged up and down is arranged on the sliding seat 31, a third clamping end 33 is hinged on the connecting piece 32, an elastic restraining piece 34 is connected between the third clamping end 33 and the connecting piece 32, and the elastic restraining piece 34 is symmetrically distributed and located on both sides of the connecting piece 32. During the clamping process, the sliding seat 31 moves synchronously relative to or synchronously in the opposite direction to quickly control the third clamping end 33 to clamp or unlock the workpiece 2, and can adaptively change accordingly according to the structure of the workpiece 2; Figure 6 As shown, when clamping the workpiece 2 with a regular hexagonal structure, the sliding seat 31 slides relatively synchronously. After the third clamping end 33 contacts the workpiece 2, as the sliding seat 31 continues to slide, the third clamping end 33 automatically rotates under the limit of the side of the workpiece 2 until the clamping surface of the third clamping end 33 fits and abuts against the corresponding surface of the workpiece 2, thereby limiting the outer side of the workpiece 2. When clamping and fixing the workpiece 2 with a regular quadrilateral structure, as shown in FIG. Figure 7 As shown, similarly, the third clamping end 33 will rotate under the limitation of the side of the workpiece 2 until it fits and abuts against the corresponding surface of the workpiece 2, thereby limiting the outside of the workpiece 2; the outside clamping and fixing of the regular octagon is the same as the above process.

[0025] See also Figure 3-Figure 7 The connecting member 32 is hinged to the sliding seat 31, and an adjusting seat 35 is slidably connected to the sliding seat 31. An adjusting member 36 is hinged between the adjusting seat 35 and the connecting member 32. The sliding adjusting seat 35 controls the opening angle between the symmetrical connecting members 32 through the adjusting member 36; Figure 6As shown, the adjustment seat 35 slides through the adjustment member 36 to pull the connecting member 32 to rotate, so that the angle between the upper and lower symmetrically distributed connecting members 32 changes, and the clamping range of the third clamping end 33 is increased, so that the middle clamp 3 is suitable for clamping and fixing the workpiece 2 with a regular quadrilateral structure, a regular hexagonal structure and a regular octagonal structure, further improving the application scope of the present invention, wherein an adjusting screw 37 is threadedly connected to the adjustment seat 35, and the adjusting screw 37 is rotatably connected to the sliding seat 31, and the sliding seat 31 is controlled to slide by rotating the adjusting screw 37 and the sliding seat 31 is instantly locked in the current position.

[0026] See also Figure 3-Figure 7 , a pre-adjusting member 38 is connected to the third clamping end 33, the pre-adjusting members 38 are symmetrically distributed and located on both sides of the third clamping end 33, an elastic reset member 39 is connected between the pre-adjusting member 38 and the third clamping end 33, and the contact mode between the pre-adjusting member 38 and the workpiece 2 is point contact or line contact, and the contact mode between the third clamping end 33 and the workpiece 2 is surface contact. In the process of clamping the workpiece 2, the pre-adjusting member 38 first contacts the workpiece 2 and preliminarily adjusts the position state of the third clamping end 33 according to the position state of the workpiece 2; Figure 6 As shown, during the synchronous relative sliding of the sliding seat 31, the pre-adjustment member 38 first contacts the workpiece 2 and causes the third clamping end 33 to rotate a certain amount under the limit of the workpiece 2 for pre-adjustment, so that the third clamping end 33 enters a state that is convenient for limited clamping, effectively avoiding the situation where the third clamping end 33 is unable to quickly complete the clamping work or damages the workpiece 2 during the clamping process.

[0027] See also Figure 3 , Figure 6 and Figure 7 The pre-adjustment member 38 includes a hinge rod 381, one end of the hinge rod 381 is hinged to the third clamping end 33, and the other end is connected to the contact end 382. The elastic reset member 39 is connected between the hinge rod 381 and the third clamping end 33, and the elasticity of the elastic reset member 39 is greater than the elasticity of the elastic suppression member 34. During the clamping process, the contact end 382 first contacts the workpiece 2, and then the third clamping end 33 is driven to rotate through the hinge rod 381 under the limitation of the workpiece 2. The position state of the third clamping end 33 is preliminarily adjusted according to the position state of the workpiece 2, so that the third clamping end 33 can clamp and fix the workpiece 2 quickly and stably.

[0028] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A CNC machine tool base clamping tool for profile processing, characterized in that: It includes an end chuck, which clamps and fixes the workpiece from both ends of the workpiece and can rotate the workpiece to switch the processing surface of the workpiece; A middle chuck, which is located in the area between the end chucks and clamps the workpiece from both sides, and cooperates with the end chucks to put the workpiece in a stable and accurate processing state; The end chuck comprises a rotatable disc seat, a control seat is slidably arranged on the disc seat, the control seats are distributed along the circumference of the disc seat and are distributed in a rectangular shape, a first clamping end and a second clamping end are arranged on the control seat, and the first clamping end and the second clamping end on the control seat are distributed in sequence from inside to outside along the radial direction of the disc seat; The second clamping ends on any two adjacent control seats respectively limit and clamp the two adjacent faces on the regular hexagonal workpiece, and the second clamping ends on the other two control seats limit and clamp the corresponding two adjacent faces on the regular hexagonal workpiece; The middle clamping head comprises a symmetrically arranged sliding seat, a connecting piece is symmetrically arranged on the sliding seat, a third clamping end is hinged on the connecting piece, an elastic restraining piece is connected between the third clamping end and the connecting piece, the elastic restraining piece is symmetrically distributed and located on both sides of the connecting piece, and the third clamping end can be adaptively rotated according to the state of the processing surface of the workpiece until its clamping surface is in contact with the corresponding side surface of the workpiece; The connecting member is hinged to the sliding seat, an adjusting seat is slidably connected to the sliding seat, an adjusting member is hinged between the adjusting seat and the connecting member, and the sliding adjusting seat controls the opening angle between the symmetrical connecting members through the adjusting member to control the clamping range of the third clamping end on the symmetrical connecting member; The third clamping end is connected with a pre-adjusting member, which is symmetrically distributed and an elastic reset member is connected between the pre-adjusting member and the third clamping end, and the contact mode between the pre-adjusting member and the workpiece is point contact or line contact, and the contact mode between the third clamping end and the workpiece is surface contact. In the process of clamping the workpiece, the pre-adjusting member first contacts the workpiece and preliminarily adjusts the position state of the third clamping end according to the position state of the workpiece. The pre-adjusting member includes a hinged rod, one end of which is hinged to the third clamping end, and the other end is connected to the contact end. The elastic reset member is connected between the hinged rod and the third clamping end, and the elastic force of the elastic reset member is greater than the elastic force of the elastic suppression member.

2. The CNC machine tool base clamping tool for profile processing according to claim 1, characterized in that: An adjusting screw is threadedly connected to the adjusting seat, and the adjusting screw is rotatably connected to the sliding seat.

3. The CNC machine tool base clamping tool for profile processing according to claim 1, characterized in that: The first clamping end is located on a side of the corresponding second clamping end close to the center of the disc seat, and a side of the first clamping end close to the corresponding second clamping end is arc-shaped.

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