Repeated positioning device of milling machine

Abstract

The utility model discloses a repeated positioning device for a milling machine. The repeated positioning device comprises a base, a top seat, a locking mechanism and a positioning column, at least two positioning holes are formed in the upper surface of the base, and the positioning columns are vertically arranged on the lower surface of the top seat and matched with the positioning holes in number; the locking mechanism is arranged in the base, the locking mechanism comprises two locking blocks, a driving block and reset springs, the two locking blocks and the two reset springs are symmetrically arranged on the base, the locking blocks are arranged in a sliding mode and provided with wedge-shaped plugs, and the reset springs are fixedly arranged and connected with the locking blocks in a matched mode; the driving block is slidably arranged on the base; a locking groove is formed in the lower surface of the top base, and the end of the locking groove is matched with the wedge-shaped plug structure. The top seat and the base are designed to be separable, so that the requirement for external clamping of the top seat and a product is met, the top seat and the base are quickly positioned and connected through the locking block and the driving block, the machining efficiency is improved, and the machining cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of milling machine processing, and in particular relates to a repeated positioning device for a milling machine. Background Art

[0002] In the field of machining, many products contain small and medium-sized parts, which are small in size, light in weight, and diverse in structure. The patent with publication number CN 217571947 U discloses a repeated positioning clamping device for CNC milling machines. Although the device can realize the off-machine clamping of parts, due to the wide variety of product specifications, each time a specification is changed, the clamping fixture of the product needs to be redesigned and processed, and the clamping fixture needs to be clamped and calibrated, which is not only inefficient, but also increases the processing cost of the product. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a milling machine repeated positioning device that can achieve off-machine clamping and rapid positioning of products, thereby helping to improve production efficiency and reduce product processing costs.

[0004] To solve the problems of the prior art, the present invention discloses a milling machine repeating positioning device, comprising a base for mounting on a processing table of the milling machine, a top seat for fixing parts, a locking mechanism for locking and unlocking the base and the top seat, and a positioning column for positioning the base and the top seat;

[0005] The upper surface of the base is provided with at least two positioning holes, the positioning posts are vertically arranged on the lower surface of the top seat and the number of the positioning posts matches the number of the positioning holes; the locking mechanism is arranged in the base,

[0006] The locking mechanism comprises a locking block, a driving block and a return spring, wherein two locking blocks and two return springs are symmetrically arranged on the base, the locking block is slidably arranged and has a wedge-shaped plug, and the return spring is fixedly arranged and matched with the locking block; the driving block is slidably arranged on the base, and its sliding direction is perpendicular to the sliding direction of the locking block;

[0007] The lower surface of the top seat is provided with a locking groove, and the end of the locking groove matches the wedge-shaped plug structure;

[0008] After the top seat is aligned with the base and is at the minimum spacing, moving the drive block can drive the wedge-shaped plug of the locking block to contact or disengage with the end of the locking groove to achieve locking and unlocking of the top seat and the base.

[0009] Furthermore, the upper surface of the base is provided with a "T"-shaped groove running through both sides, the bottom of the locking block is a "T"-shaped structure that forms a matching sliding connection with the "T"-shaped groove, and blocking blocks are provided at both ends of the "T"-shaped groove, and the return spring is arranged between the corresponding blocking block and the locking block.

[0010] Furthermore, the driving block has a narrow section, a transition section connected to both ends of the narrow section, and a wide section connected to the end of the transition section; after the inner side surface of the locking block contacts the side surface of the narrow section, the locking block is in an unlocked position; after the inner side surface of the locking block contacts the side surface of the wide section, the locking block is in a locked position.

[0011] Furthermore, the side surface of the narrow section of the driving block has an arcuate groove, the inner side surface of the locking block is provided with a pin mounting hole, a ball pin and an ejection spring are provided in the pin mounting hole, and when the locking block is in the unlocked position, the end of the ball pin cooperates with the arcuate groove.

[0012] Furthermore, the base is provided with slots penetrating through two sides, and the driving block is slidably arranged in the slots.

[0013] Furthermore, when the two ends of the driving block move to a position where the locking block is in an unlocked state, both ends extend out of the end portions of the slot; both ends of the driving block are provided with limiting members, and when the limiting members contact the side surfaces of the base, the driving block moves to a position where the locking block is in a locked state.

[0014] Furthermore, a spring hole is provided on the upper surface of the base, a support spring is provided in the spring hole, and when the top seat and the base are at a minimum distance, the support spring is in a compressed state to provide support for the top seat.

[0015] Furthermore, the base and the top seat are square structures.

[0016] The present invention has the beneficial effects:

[0017] 1. The top seat and the base in the present invention are designed to be separable, thereby meeting the requirements of the top seat and the product being clamped outside the machine, and the top seat and the base are quickly positioned and connected through the locking block and the driving block, thereby improving processing efficiency and reducing processing costs.

[0018] 2. The locking block and the driving block in the present invention adopt a sliding fit to achieve the switching between locking and unlocking, which is simple to operate and quick to respond. It can be controlled manually or electrically, leaving more room for modification.

[0019] 3. The support spring in the present invention can provide additional support force, and can lift up the top seat after unlocking, making it easier for the user to take it away. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural stereogram of a preferred embodiment of the present invention;

[0021] Figure 2 for Figure 1 An exploded view of the structure of the embodiment shown;

[0022] Figure 3 for Figure 1 A top view of the structure of the illustrated embodiment;

[0023] Figure 4 for Figure 3 Structural cross-section view along the AA axis;

[0024] Figure 5 for Figure 3 Structural cross-section view along the BB direction;

[0025] Figure 6 for Figure 4 The illustrated embodiment corresponds to a structural cross-sectional view of a locked state. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0027] like Figure 1 and 6 As shown, a milling machine repeatable positioning device includes a base 1, a top seat 2, a locking mechanism and a positioning column 8.

[0028] The base 1 is fixed on the processing table of the milling machine, and the upper surface of the top seat 2 can be designed to fix the product to be processed in any way (such as cylinder, bolt, negative pressure adsorption, etc.). Therefore, the top seat 2 can be regarded as a fixture base for placing the object to be processed. It used to take a lot of time to install when the milling machine is stopped, but now it only needs to be installed outside the processing table. Directly using the structure of the present invention can save installation time and improve accuracy.

[0029] As a preferred example, the base 1 and the top seat 2 are square structures and are made of metal materials.

[0030] The locking mechanism is mounted on the base 1, and comprises a locking block 5, a driving block 4 and a return spring 6. The locking block 5 and the return spring 6 are both symmetrically arranged in pairs, the locking block 5 is slidably arranged and has a wedge-shaped plug 5.1 arranged outwardly, and the return spring 6 is fixedly arranged and matched with the locking block 5.

[0031] The upper surface of the base 1 is vertically provided with four positioning holes 1.2 and a "T"-shaped slide groove 1.1 penetrating both sides, and the positioning holes 1.2 are evenly distributed along the circumferential direction. The lower surface of the base 1 is vertically provided with a block screw hole 1.5, and the block screw hole 1.5 penetrates to the bottom of the groove at both ends of the "T"-shaped slide groove 1.1.

[0032] The bottom of the locking block 5 is a "T"-shaped structure that forms a matching sliding connection with the "T"-shaped slide groove 1.1. Blocks 3 are provided at both ends of the "T"-shaped slide groove 1.1, and the reset spring 6 is provided between the corresponding block 3 and the locking block 5. Block screws 9 are installed in the block screw holes 1.5. The block 3 is provided with threaded holes B3.1, which are fixed to the two ends of the "T"-shaped slide groove 1.1 through the block screws 9. The outer end of the locking block 5 is provided with a reset spring 6 hole. The function of the block 3 is to provide a limit for the outer end of the reset spring 6. The inner end of the reset spring 6 abuts against the inner end of the reset spring 6 hole of the locking block 5. The reset spring 6 makes the locking block 5 have a tendency to move inward, thereby maintaining the unlocked state.

[0033] The base 1 is also provided with slots 1.4 passing through the other two sides, and the driving block 4 is slidably arranged in the slots 1.4. The extending direction of the slots 1.4 is perpendicular to the extending direction of the "T"-shaped slide slot 1.1, so that the moving direction of the driving block 4 is perpendicular to the sliding direction of the locking block 5.

[0034] The lower surface of the top seat 2 is vertically provided with four positioning column holes 2.2 corresponding to the positioning holes 1.2, and the upper surface is vertically provided with four positioning screw 10 holes respectively connected to the corresponding positioning column holes 2.2 and four mounting holes for mounting workpieces or workpiece fixtures. The mounting holes are evenly distributed along the circumferential direction. The positioning screw 10 hole is installed with a positioning screw 10, and the positioning column 8 is installed in the positioning column hole 2.2. The top of the positioning column 8 is provided with a threaded hole A8.1 matching the positioning screw 10, and the top of the positioning column 8 is fixed in the positioning column hole 2.2 by the positioning screw 10. The positioning column 8 not only plays a positioning role, but also can form a support for the top seat 2, and together with the locking block 5, it realizes the fixation of the top seat 2 and the base 1.

[0035] The lower surface of the top seat 2 is provided with a locking groove 2.3, the end of which matches the structure of the wedge plug 5.1. When the top seat 2 is connected to the base 1, the positioning column 8 is inserted into the positioning hole 1.2 to achieve the positioning of the two, and the locking block 5 is used to lock and fix the two after positioning.

[0036] After the top seat 2 is aligned with the base 1 and is at the minimum distance, moving the drive block 4 can drive the wedge-shaped plug 5.1 of the locking block 5 to contact or disengage with the end of the locking groove 2.3 to achieve locking and unlocking of the top seat 2 and the base 1.

[0037] As a preferred example, the driving block 4 has a narrow section 4.2, a transition section 4.3 connected to both ends of the narrow section 4.2, and a wide section 4.4 connected to the end of the transition section 4.3. After the inner side surface of the locking block 5 contacts the side surface of the narrow section 4.2, the distance between the locking blocks 5 is the shortest, so it is in the unlocking position; after the inner side surface of the locking block 5 contacts the side surface of the wide section 4.4, the distance between the locking blocks 5 is the farthest, so it is in the locking position. Both sides of the narrow section 4.2 and the wide section 4.4 are parallel surfaces, and both sides of the transition section 4.3 are inclined surfaces.

[0038] As a preferred example, the side surface of the narrow section 4.2 of the driving block 4 has an arc groove 4.1, and the inner side surface of the locking block 5 is provided with a pin mounting hole 5.3, and the pin mounting hole 5.3 is provided with a ball pin 12 and an ejection spring 13. When the locking block 5 is in the unlocked position, the end of the ball pin 12 is matched with the arc groove 4.1. The purpose of providing the arc groove 4.1 and the ball pin 12 is to use the resistance generated when the two cooperate as feedback, so that the operator knows that the locking block 5 is in the unlocked state at this time, so as to remove the top seat 2. At the same time, it will not affect the normal movement of the driving block 4.

[0039] As a preferred example, when the two ends of the driving block 4 move to the position where the locking block 5 is in an unlocked state, the two ends extend out of the ends of the slot 1.4; both ends of the driving block 4 are provided with limiting members, and when the limiting members contact the side of the base 1, the driving block 4 moves to the position where the locking block 5 is in a locked state. During the locking operation, it is only necessary to move any one end of the driving block 4 so that it is completely in a state limited by the limiting member to achieve the locking of the locking block 5, making the locking operation simpler and faster. It should be noted that the driving method of the driving block 4 can also be improved to be driven by other actuators such as cylinders and electric cylinders to replace manual drive to improve efficiency.

[0040] As a preferred example, a spring hole is provided on the upper surface of the base 1, and a support spring is provided in the spring hole. When the top seat 2 is at the minimum distance from the base 1, the support spring is in a compressed state to provide support for the top seat 2. The support spring provides a supporting force to the top seat 2, and can lift the top seat 2 upward in the unlocked state, so that the user can take out the top seat 2 easily.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A milling machine repeated positioning device, characterized in that: It comprises a base (1) for mounting on a processing table of a milling machine, a top seat (2) for fixing parts, a locking mechanism for locking and unlocking the base (1) and the top seat (2), and a positioning column (8) for positioning the base (1) and the top seat (2); The upper surface of the base (1) is provided with at least two positioning holes (1.2); the positioning columns (8) are vertically arranged on the lower surface of the top seat (2) and the number of the positioning columns matches the number of the positioning holes (1.2); the locking mechanism is arranged in the base (1), The locking mechanism comprises a locking block (5), a driving block (4) and a return spring (6); two locking blocks (5) and two return springs (6) are symmetrically arranged on the base (1); the locking block (5) is slidably arranged and has a wedge-shaped plug (5.1); the return spring (6) is fixedly arranged and matched with the locking block (5); the driving block (4) is slidably arranged on the base (1), and its sliding direction is perpendicular to the sliding direction of the locking block (5); A locking groove (2.3) is provided on the lower surface of the top seat (2), and the end of the locking groove (2.3) matches the structure of the wedge-shaped plug (5.1); After the top seat (2) and the base (1) are aligned and positioned at a minimum spacing, the driving block (4) can be moved to drive the wedge-shaped plug (5.1) of the locking block (5) to contact or disengage from the end of the locking groove (2.3), thereby achieving locking and unlocking of the top seat (2) and the base (1).

2. A milling machine repeated positioning device according to claim 1, characterized in that: The upper surface of the base (1) is provided with a "T"-shaped slide groove (1.1) that passes through both sides; the bottom of the locking block (5) is a "T"-shaped structure that forms a matching sliding connection with the "T"-shaped slide groove (1.1); blocking blocks (3) are provided at both ends of the "T"-shaped slide groove (1.1); and the return spring (6) is provided between the corresponding blocking block (3) and the locking block (5).

3. A milling machine repeated positioning device according to claim 1, characterized in that: The driving block (4) comprises a narrow section (4.2), a transition section (4.3) connected to both ends of the narrow section (4.2), and a wide section (4.4) connected to the end of the transition section (4.3); after the inner side surface of the locking block (5) contacts the side surface of the narrow section (4.2), the locking block (5) is in an unlocking position; after the inner side surface of the locking block (5) contacts the side surface of the wide section (4.4), the locking block (5) is in a locking position.

4. A milling machine repeated positioning device according to claim 1, characterized in that: The side surface of the narrow section (4.2) of the driving block (4) has an arcuate groove (4.1), the inner side surface of the locking block (5) is provided with a pin mounting hole (5.3), a ball pin (12) and an ejection spring (13) are provided in the pin mounting hole (5.3), and when the locking block (5) is in the unlocked position, the end of the ball pin (12) is matched with the arcuate groove (4.1).

5. The milling machine repositioning device according to claim 1, characterized in that: The base (1) is provided with a slot (1.4) penetrating through two sides, and the drive block (4) is slidably arranged in the slot (1.4).

6. A milling machine repeated positioning device according to claim 5, characterized in that: When the two ends of the driving block (4) move to a position where the locking block (5) is in an unlocked state, the two ends extend out of the ends of the slot (1.4); both ends of the driving block (4) are provided with limit members, and when the limit members contact the side surface of the base (1), the driving block (4) moves to a position where the locking block (5) is in a locked state.

7. The milling machine repositioning device according to claim 1, characterized in that: A spring hole is provided on the upper surface of the base (1), and a support spring is provided in the spring hole; when the top seat (2) and the base (1) are at a minimum distance, the support spring is in a compressed state to provide support for the top seat (2).

8. The milling machine repositioning device according to claim 1, characterized in that: The base (1) and the top seat (2) are square structures.

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