Self-positioning rotary cutting tool

Abstract

The utility model discloses a self-positioning rotary cutting tool, and belongs to the technical field of rotary cutting of non-metal parts. Comprising a four-jaw hydraulic chuck, and the four-jaw hydraulic chuck comprises four sets of clamping jaws distributed in a rectangular shape; the four-jaw hydraulic chuck is coaxially provided with a tool bottom plate; a working cavity is formed in the middle of the tool bottom plate, and a product workpiece is installed in the working cavity. And the product workpiece is made of a non-metal material. A position groove is formed in the tool bottom plate, a guide rod is installed in the position groove, one end of the guide rod extends out of the tool bottom plate and movably abuts against the clamping jaw, and the other end of the guide rod extends to the working cavity and is provided with a positioning block set; the positioning block group is suitable for movably abutting against the outer wall of a product workpiece; an elastic piece is installed in the position groove, and the elastic piece is suitable for being connected to the guide rod in a sleeving mode and limiting the guide rod to be disengaged from the position groove. The utility model solves the technical problem that batch products do not conform to the standard because marks are easily generated when the diameter of the conventional clamping rod piece is clamped on a non-metal workpiece.

Description

TECHNICAL FIELD

[0001] The utility model belongs to non -metal piece rotary cutting technical field relates to a kind of self-positioning rotary cutting tool. BACKGROUND

[0002] In the current non-metallic parts in the expansion of application in various fields, while the rapid growth of production and scale, product consistency increasingly strict requirement. Especially in non-metallic material, its hardness is not strong, if directly using chuck claw clamping on non-metallic workpiece material, to ensure clamping will increase the travel of claw, resulting in leaving mark on workpiece side, produce product quality problem. For example, the product workpiece using non-metallic material is graphite material, and the hardness is not enough compared with metal claw, and traces are easily generated.

[0003] For example, reference CN201220073135.7 a numerical control three-jaw elastic clamping mechanism is used to realize elastic connection by installing spring on sliding sleeve and chuck, but there is still directly clamped on non-metallic workpiece, and traces are easily generated, and the clamping part is hinged rod structure, and there is clamping uncertainty. At the same time, three sets of claws can only clamp the products with the same radius, for example, circular product workpiece, and there is the problem of insufficient applicability.

[0004] In view of the above, the utility model discloses a kind of self-positioning rotary cutting tool. SUMMARY

[0005] The utility model solves the problem that existing clamping rod diameter is clamped on non-metallic workpiece, and traces are easily generated, which brings the technical problem that batch products do not meet the standard.

[0006] In order to solve the above technical problems, the inventors have summarized the technical scheme of the utility model through practice, and the utility model discloses the basic concept of technical scheme is as follows:

[0007] A kind of self-positioning rotary cutting tool, including four-jaw hydraulic chuck, the four-jaw hydraulic chuck includes four sets of rectangular distribution clamping jaws;The four-jaw hydraulic chuck is coaxially installed with tool base plate;

[0008] The middle part of the tool base plate is provided with a working cavity, and a product workpiece is installed in the working cavity;The product workpiece is of non-metallic material.

[0009] Positioning groove is opened in the tool base plate, a guide rod is installed in the positioning groove, one end of the guide rod extends to the outside of the tool base plate and is movably abutted with the clamping jaw, the other end extends to the working cavity and is installed with a positioning block group;The positioning block group is movably abutted on the outer wall of the product workpiece;

[0010] The elastic member is installed in the position slot and is adapted to be sleeved on the guide rod and limit the guide rod from being separated from the position slot.

[0011] In a further technical solution, a plurality of positioning holes and mounting holes are formed on the tool base plate, a positioning pin is installed in the positioning hole, and an inner hexagonal bolt is installed in the mounting hole.

[0012] In a further technical solution, an end head is arranged on one side of the guide rod, and an inner hexagonal hole is formed in the end head; the rod body of the guide rod extends out of the position slot and is installed with a locking pin between the position block and the end head.

[0013] The positioning block set comprises a first positioning block and a second positioning block, and a cross hole is formed in each of the first positioning block and the second positioning block, and is adapted to be connected with the guide rod and the locking pin.

[0014] The diameter of the end head is greater than the diameter of the rod body of the guide rod, the position slot is in the shape of "T", and a stepped surface is arranged inside; the elastic member comprises a return spring, the return spring is installed between the end head and the stepped surface, one end of the return spring is fixedly connected with the end head, and the other end of the return spring is fixedly connected with the inner wall of the stepped surface.

[0015] In a further technical solution, the product workpiece comprises an arc-shaped top surface, the bottom of the arc-shaped top surface is connected with a first side surface and a second side surface, the bottom of the first side surface and the second side surface is provided with a bottom surface, and a transition inclined surface is arranged at the connection position. A circular arc groove is marked on the surface of the product workpiece, and the product workpiece is made of graphite material.

[0016] In a further technical solution, a first plate, a second plate, a third plate and a fourth plate are installed in the working cavity, and the first plate, the second plate, the third plate and the fourth plate are respectively installed at four corners of the working cavity.

[0017] The spacing between the first plate, the second plate, the third plate and the fourth plate is in the shape of a cross, and is adapted to the movement of the corresponding first positioning block or second positioning block.

[0018] A first groove is formed in the first plate, a second groove is formed in the second plate, the first groove comprises an arc surface one, and the second groove comprises an arc surface two, and the arc surface one and the arc surface two are parallel to the corresponding arc-shaped top surface.

[0019] The third plate comprises a third groove, and the bottom of the first groove and the third groove are attached to the first side surface of the product workpiece.

[0020] The inner wall of the working cavity of the second plate, the third plate and the fourth plate is provided with an abutting block, and the abutting block is adapted to abut against the bottom surface and the second side surface of the product workpiece.

[0021] In a further technical solution, the positioning block two located at the top of the product workpiece is provided with a fitting surface opposite the arc-shaped top surface, the fitting surface is arc-shaped and is suitable for being movably fitted on the arc-shaped top surface; the positioning block one is provided with three groups of movable abutting side surfaces one, side surfaces two and bottom surfaces.

[0022] In a further technical solution, the thickness of the abutting block part is greater than the thickness of the positioning block one; the size of the clamping jaw is greater than the size of the end head part.

[0023] The utility model discloses a limiting clamping size and the action of clamping force of the clamping jaw, when the hydraulic station system drive oil cylinder drives four sets of clamping jaws to be synchronous clamped, the compression guide rod moves to the outer ring of tooling bottom plate and is positioned, and the compression guide rod compresses the return spring, and simultaneously drives the positioning block one and the positioning block two to move and clamp the workpiece.

[0024] The outer ring of the tooling bottom plate is positioned, the clamping size is relatively fixed, and the clamping force of the clamping jaw is prevented from being too large to damage the workpiece of graphite material. When the clamping jaw is loosened, the guide rod is driven to move outward under the restoring force of the return spring, and the positioning block one or the positioning block two is returned to the fixed position. The tooling bottom plate has multiple plate members and abutting block parts, can predefine the position of the product workpiece, and can be positioned in advance. The positioning block is designed in a profiled manner, is more fitted to the workpiece, and improves the machining precision. The utility model has the following advantages: repeated high-precision positioning, quantitative clamping, and batch production of workpieces.

[0025] Advantages

[0026] The utility model discloses the following advantages: the utility model discloses a limiting clamping size and the action of clamping force of the clamping jaw, and the connecting position compression guide rod moves to the outer ring of tooling bottom plate and is positioned, and the compression guide rod compresses the return spring, and simultaneously drives the positioning block one and the positioning block two to move and clamp the workpiece. The tooling bottom plate has the technical effects of outer ring positioning and stable installation, and the clamping force of the clamping jaw is prevented from being too large to damage the workpiece of graphite material and other materials with small hardness. DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0028] Figure 1 It is a schematic diagram of the prior four-jaw hydraulic chuck directly connected with the product workpiece.

[0029] Figure 2 It is a structure diagram of the self-positioning rotary cutting tool of the utility model.

[0030] Figure 3 It is the front view schematic diagram of the self-positioning rotary cutting tool of the utility model;

[0031] Figure 4 It is Figure 3 A-A sectional view of the utility model;

[0032] Figure 5 It is Figure 4 B part enlarged view of the utility model;

[0033] Figure 6 It is the schematic diagram of the product workpiece of the utility model;

[0034] Figure 7 It is the structure diagram of the tooling bottom plate of the utility model;

[0035] Figure 8 It is the schematic diagram of the positioning block one of the utility model;

[0036] Figure 9 It is the schematic diagram of the positioning block two of the utility model;

[0037] In the drawing: 1, four-jaw hydraulic chuck; 2, tooling bottom plate; 3, product workpiece; 4, guide rod; 5, positioning block one; 6, positioning block two; 7, return spring; 8, plate one; 9, plate two; 10, plate three; 11, plate four; 12, abutting block part; 13, clamping jaw;

[0038] 21, position slot; 22, mounting hole; 23, inner hexagonal bolt; 24, step surface; 25, positioning hole;

[0039] 31, arc top surface; 32, side surface one; 33, side surface two; 34, bottom surface; 35, transition inclined surface; 36, circular arc groove;

[0040] 41, end head part; 42, inner hexagonal hole; 43, locking pin;

[0041] 61, abutting surface;

[0042] 81, groove one; 91, groove two; 101, groove three; DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application is further described in detail below in combination with embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

[0044] The application principle of the present application is further described below in combination with the drawings and specific embodiments.

[0045] The conventional four-jaw hydraulic chuck clamps the product workpiece such as Figure 1As shown, there is direct contact. When the hydraulic station system drives the oil cylinder to simultaneously clamp the four sets of jaws, scratches can easily occur on the surface of products such as graphite workpieces.

[0046] Example 1

[0047] like Figures 2-5 As shown, this is one embodiment of the present invention. Figure 3 As shown, a self-positioning rotary cutting fixture includes a four-jaw hydraulic chuck 1, which includes four sets of rectangularly distributed jaws 13; a fixture base plate 2 is coaxially mounted on the four-jaw hydraulic chuck 1; a working cavity is provided in the middle of the fixture base plate 2, and a product workpiece 3 is installed in the working cavity;

[0048] like Figure 5 As shown, a position groove 21 is provided in the tooling base plate 2, and a guide rod 4 is installed in the position groove 21. One end of the guide rod 4 extends to the outside of the tooling base plate 2 and movably abuts against the claw 13, and the other end extends to the working cavity and is equipped with a positioning block assembly. The positioning block assembly is adapted to movably abut against the outer wall of the product workpiece 3. An elastic element is installed in the position groove 21, and the elastic element is adapted to be sleeved on the guide rod 4 and restrict the guide rod 4 from disengaging from the position groove 21.

[0049] The guide rod 4 is provided with an end head 41 on one side of the claw 13, and the end head 41 is provided with an internal hexagonal hole 42; the rod body of the guide rod 4 extends to the outside of the position groove 21 and a locking pin 43 is installed between it and the positioning hole 25.

[0050] like Figure 3 As shown, the positioning block assembly includes positioning block 5 and positioning block 6. Both positioning block 5 and positioning block 6 have cross holes for connecting with the guide rod 4 and the locking pin 43. The diameter of the end head 41 is larger than the diameter of the guide rod 4. The position groove 21 is T-shaped and has a stepped surface 24 inside. The elastic element includes a return spring 7, which is installed between the end head 41 and the stepped surface 24. One end of the return spring 7 is fixedly connected to the end head 41, and the other end of the return spring 7 is fixedly connected to the inner wall of the stepped surface 24.

[0051] This invention uses the jaws to press the end head, forcing the guide rod forward and driving either positioning block one or positioning block two to abut against the workpiece. The workpiece 3 is made of a material with lower hardness than the jaws, such as graphite, making it prone to scratches. Positioning blocks one and two can be made of materials with lower hardness. For four-jaw hydraulic chucks, a hydraulic station system is conventionally used to drive the cylinders, which typically result in high driving stress.

[0052] Example 2

[0053] like Figures 6-9As shown, this is another embodiment of the present invention, based on embodiment 1, as follows: Figure 6 As shown, the product workpiece 3 includes an arc-shaped top surface 31, with side surface 32 and side surface 33 connected to the bottom ends of the arc-shaped top surface 31. The bottom of side surface 32 and side surface 33 is provided with a bottom surface 34, and a transition slope 35 is provided at the connection. The surface of the product workpiece 3 is marked with an arc-shaped groove 36.

[0054] The tooling base plate 2 has multiple sets of positioning holes 25 and mounting holes 22. Positioning pins are installed in the positioning holes 25, and internal hex bolts 23 are installed in the mounting holes 22.

[0055] To facilitate the installation of product workpiece 3, plate 1 8, plate 2 9, plate 3 10 and plate 4 11 are installed in the working cavity, and plate 1 8, plate 2 9, plate 3 10 and plate 4 11 are respectively installed at the four corners of the working cavity;

[0056] The spacing between plate 1 (8), plate 2 (9), plate 3 (10), and plate 4 (11) is cross-shaped and suitable for the movement of the corresponding positioning block 1 (5) or positioning block 2 (6). The surface shapes of plate 1 (8), plate 2 (9), plate 3 (10), and plate 4 (11) are different, making them easy to distinguish and facilitating workpiece installation.

[0057] The plate 8 has a groove 81 and the plate 9 has a groove 91. The groove 81 includes an arc surface 1 and the groove 91 includes an arc surface 2. The arc surface 1 and the arc surface 2 are parallel to the corresponding arc top surface 31.

[0058] The plate 3 10 includes a groove 3 101, the bottom of the groove 1 81 and the groove 3 101 are attached to the side 1 32 of the product workpiece 3; the inner walls of the working cavities of the plate 2 9, plate 3 10 and plate 4 11 are all provided with abutting blocks 12, which are adapted to abut against the bottom surface 34 and the side 2 33 of the product workpiece 3.

[0059] The main difference between positioning block one and positioning block two is that positioning block two 6, located at the top of the product workpiece 3, is provided with a contact surface 61 relative to the arc-shaped top surface 31. The contact surface 61 is arc-shaped and suitable for movably contacting the arc-shaped top surface 31. Positioning block one 5 is provided with three sets, which respectively movably abut against side surface one 32, side surface two 33 and bottom surface 34.

[0060] The thickness of the abutment block 12 is greater than the thickness of the positioning block 5, for example. Figure 7The abutting block part 12 of the middle bottom part is higher than the height of the positioning block one in vertical direction, otherwise the abutting block part cannot bear the product workpiece, and the abutting block part on the right side needs to be longer than the corresponding positioning block one in horizontal direction, otherwise the abutting block part cannot limit the product workpiece; the size of the claw 13 is larger than the size of the end part 41, and if the claw end is smaller than the end part of the guide rod, the extrusion stress is easy to be too large, and the product workpiece is easy to be damaged by extrusion. The utility model discloses a tooling bottom plate that limits the size and clamping force of the claw, and when the claw and the guide rod move together to the outer circle of the tooling bottom plate for limiting, the guide rod compresses the return spring, and simultaneously drives the positioning block one and the positioning block two to move and clamp the workpiece. The tooling bottom plate has the technical effects of outer circle limiting and stable installation, and avoids that the clamping force of the claw is too large to damage the workpiece of graphite material and other small hardness materials.

[0061] It will be obvious to a person skilled in the art that, as the application is not limited to the details of the foregoing exemplary embodiments but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application, the present application encompasses all such implementations within its scope. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and it is intended to embrace all equivalents falling within the meaning and scope of the claims.

[0062] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every implementation embodies an independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A self-locating rotary cutting tool characterized by, Including four claw hydraulic chuck (1), four groups of claws (13) are included on the four claw hydraulic chuck (1) including rectangular distribution;The tooling base plate (2) is coaxially installed on the four claw hydraulic chuck (1); The middle part of the tooling base plate (2) is provided with a working cavity, and a product workpiece (3) is installed in the working cavity, wherein the product workpiece (3) is made of non-metallic material; A position groove (21) is formed in the tooling base plate (2), a guide rod (4) is installed in the position groove (21), one end of the guide rod (4) extends out of the tooling base plate (2) and is movably abutted with the claw (13), the other end of the guide rod (4) extends into the working cavity and is provided with a positioning block group;The positioning block group is adapted to be movably abutted on the outer wall of the product workpiece (3); An elastic member is installed in the position groove (21), and the elastic member is adapted to be sleeved on the guide rod (4) and limit the guide rod (4) from being separated from the position groove (21).

2. A self-locating rotary cutting tool according to claim 1, wherein, A plurality of positioning holes (25) and mounting holes (22) are formed in the tooling base plate (2), a positioning pin is installed in the positioning hole (25), and an inner hexagonal bolt (23) is installed in the mounting hole (22).

3. A self-locating rotary cutting tool according to claim 2, wherein, The end head (41) is provided on one side of the guide rod (4) located at the claw (13), and the end head (41) is provided with an inner hexagonal hole (42);The rod body of the guide rod (4) extends out of the position groove (21) and is provided with a locking pin (43) between the positioning hole (25) and the block; The positioning block group includes a first positioning block (5) and a second positioning block (6), and the first positioning block (5) and the second positioning block (6) are both provided with a cross hole and are connected with the guide rod (4) and the locking pin (43); The diameter of the end head (41) is greater than the diameter of the rod body of the guide rod (4), the position groove (21) is in the shape of "T", and is provided with a stepped surface (24);The elastic member includes a return spring (7), the return spring (7) is installed between the end head (41) and the stepped surface (24), one end of the return spring (7) is fixedly connected with the end head (41), and the other end of the return spring (7) is fixedly connected with the inner wall of the stepped surface (24).

4. A self-locating rotary cutting tool according to claim 3, wherein, The product workpiece (3) includes an arc-shaped top surface (31), the bottom ends of the arc-shaped top surface (31) are connected with a first side surface (32) and a second side surface (33), the bottom ends of the first side surface (32) and the second side surface (33) are provided with a bottom surface (34), and the connection portions are provided with a transition inclined surface (35); The product workpiece (3) is provided with a circular arc groove (36) on the surface, and the product workpiece (3) is made of graphite material.

5. A self-locating rotary cutting tool according to claim 4, wherein, Plate one (8), plate two (9), plate three (10) and plate four (11) are installed in the working cavity, and the plate one (8), the plate two (9), the plate three (10) and the plate four (11) are respectively installed at four corners of the working cavity; The spacing of the plate one (8), the plate two (9), the plate three (10) and the plate four (11) is in the shape of cross, and is adapted to the movement of the corresponding first positioning block (5) or second positioning block (6). The plate member one (8) is provided with a groove one (81), the plate member two (9) is provided with a groove two (91), the groove one (81) includes an arc surface one, the groove two (91) includes an arc surface two, the arc surface one and the arc surface two are parallel to the corresponding arc top surface (31); The plate member three (10) includes a groove three (101), the bottom of the groove one (81) and the groove three (101) are attached to the side one (32) of the product workpiece (3); The working cavity inner wall of the plate member two (9), the plate member three (10) and the plate member four (11) are all provided with an abutting block part (12), the abutting block part (12) is suitable for abutting from the bottom surface (34) and the side two (33) of the product workpiece (3).

6. A self-locating rotary cutting tool according to claim 5, wherein, The positioning block two (6) located at the top of the product workpiece (3) is provided with an attached surface (61) opposite to the arc top surface (31), the attached surface (61) is arc-shaped and is suitable for being movably attached to the arc top surface (31); the positioning block one (5) is provided with three groups and is movably attached to the side one (32), the side two (33) and the bottom surface (34) respectively.

7. A self-locating rotary cutting tool according to claim 6, wherein, The thickness of the abutting block part (12) is greater than the thickness of the positioning block one (5); the size of the clamping jaw (13) is greater than the size of the end head part (41).

Images