Automatic positioning and drilling device

Abstract

The utility model discloses an automatic positioning and drilling device, which relates to the technical field of automobile part processing, solves the problem that the milling precision is influenced by poor clamping stability when a central hub is processed, and comprises a drilling mechanism with a rotatable drill bit; a lifting module; the positioning mechanism comprises a supporting column, at least three inner supporting columns which are arranged on the outer circumferential surface of the supporting column and can telescopically move in the radial direction of the supporting column, and an ejector rod for controlling the inner supporting columns to telescopically move; and the auxiliary clamping mechanism comprises two chucks which are oppositely arranged. A center hub to be machined is located on the supporting column and is supported and fixed through the inner supporting column, the upper end of the center hub can be clamped and fixed through two chucks in the auxiliary positioning mechanism, the center hub is automatically positioned, it is guaranteed that the center hub is coaxial with the supporting column and the drill bit, a machined positioning hole is coaxial with a blind hole in the center hub, and the machining efficiency is improved. Therefore, the two ends of the central hub can be clamped and positioned subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing, in particular to an automatic positioning drilling device. Background Art

[0002] The center hub is a kind of automobile part, mainly used on the automobile wheel axle. As Figure 6 shown, the center hub 6 is thick at one end and thin at the other end. The thick end has a blind hole 601 with a larger diameter. When machining the center hub 6, it is necessary to mill the inner wall of the blind hole 601. Before machining, the center hub is usually clamped by a chuck for machining.

[0003] Since if only one end of the center hub is clamped during clamping, the center hub will be unstable during rotation. Therefore, it is necessary to clamp both ends of the center hub simultaneously, so that the center hub has higher stability during rotation and there will be no deviation during milling. Since one end for milling has a hole (the thicker end) and the other end has no hole (the thinner end), clamping both ends may cause the two ends to be non - coaxial, affecting the machining. Therefore, an auxiliary positioning hole coaxial with the blind hole is machined at the thinner end of the center hub, so that during clamping, the two ends of the center hub can be pressed against each other by a ejector rod, and then the two ends of the center hub are clamped by a chuck. In this way, the stability of the center hub during machining will be higher, which helps to improve the machining accuracy. However, there is currently a lack of an auxiliary drilling device for machining the auxiliary positioning hole at the thinner end of the center hub. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the above problems, and a kind of automatic positioning drilling device is designed to solve the problem that the milling machining accuracy is affected due to poor clamping stability during the machining of the center hub.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows: an automatic positioning drilling device, comprising:

[0006] A drilling mechanism, the drilling mechanism has a rotatable drill bit;

[0007] A lifting module, the drilling mechanism is installed on the lifting module to control the up - and - down movement of the drilling mechanism;

[0008] A positioning mechanism, the positioning mechanism is located below the drilling mechanism. The positioning mechanism includes a support column, at least three inner support columns arranged on the outer peripheral surface of the support column and capable of telescopic movement along the radial direction of the support column, and a ejector rod for controlling the telescopic movement of the inner support columns. There is an insertion hole in the middle of the support column. The ejector rod is located in the insertion hole and is in inclined surface cooperation with the inner support columns. The support column is coaxial with the drill bit;

[0009] The auxiliary clamping mechanism is located between the drilling mechanism and the positioning mechanism. The auxiliary clamping mechanism includes two chucks arranged opposite to each other. The opposite sides of the two chucks have positioning grooves for clamping and positioning the product to be processed.

[0010] Preferably, it further comprises a frame, the lifting module is vertically fixed on the frame, a sliding seat is installed on the lifting module, and the drilling mechanism is fixedly installed on the sliding seat.

[0011] Preferably, the drilling mechanism also includes a drilling motor, a machine head mounted on the drilling motor, and a grinding head mounted at the lower end of the machine head, the bottom of the grinding head has a grinding surface, the middle of the grinding head has a through hole, and the drill bit is mounted on the machine head and extends downward through the through hole.

[0012] Preferably, the positioning mechanism also includes a base and a top pressure cylinder located below the base, the top pressure cylinder is vertically fixed to the bottom of the frame, the support column is fixed on the base, the push rod is connected to the output end of the top pressure cylinder and passes through the base and the support column in sequence.

[0013] Preferably, the top of the support column has an auxiliary support member, the middle of the auxiliary support member has a through hole connected to the through hole in the middle of the support column, and the outer edge surface of the auxiliary support member has a ventilation hole.

[0014] Preferably, the end surface of the inner support column has a notch, and an elastic member for clamping the three inner support columns in sequence is arranged in the notch.

[0015] The auxiliary clamping mechanism also includes a mounting plate fixedly mounted on the frame, a mechanism body mounted on the mounting plate, two fixing seats arranged on the mechanism body, and two clamping cylinders respectively arranged on the inner sides of the fixing seats. The two fixing seats are arranged opposite to each other, and a clamping space is formed between the two fixing seats for clamping the product to be processed. The opposite sides of the two fixing seats have through holes, and the output end of the clamping cylinder is connected to the chuck.

[0016] Preferably, a strip hole is provided on the mounting plate, the strip hole extends up and down, and the mechanism body is fixed to the mounting plate by bolts.

[0017] Preferably, each fixing seat is provided with an auxiliary positioning piece, the front end of the auxiliary positioning piece extends above the clamping head, and a V-shaped positioning angle is formed between the two auxiliary positioning pieces.

[0018] Preferably, the auxiliary positioning member has an oblong hole, and the auxiliary positioning member is fixed to the fixing seat by bolts.

[0019] Compared with the prior art, the beneficial effects are:

[0020] In this utility model, the center hub to be processed is located on the support column and is fixed tightly by the inner support column. The two chucks in the auxiliary positioning mechanism will clamp and fix the upper end of the center hub to ensure that the center hub is coaxial with the support column and the drill bit. Then, the drilling mechanism moves downward driven by the lifting module to drill the thinner end of the center hub to process the positioning hole. The processed positioning hole is coaxial with the blind hole on the center hub, so as to perform clamping and positioning on both ends of the center hub subsequently to improve the processing accuracy of the blind hole. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the automatic positioning drilling device in this utility model;

[0022] Figure 2 is the installation structural schematic diagram of the lifting module and the drilling mechanism in the automatic positioning drilling device;

[0023] Figure 3 is the structural schematic diagram of the drilling mechanism in the automatic positioning drilling device;

[0024] Figure 4 is the structural schematic diagram of the auxiliary clamping mechanism in the automatic positioning drilling device;

[0025] Figure 5 is the structural schematic diagram of the positioning mechanism in the automatic positioning drilling device;

[0026] Figure 6 is the structural schematic diagram of the center hub.

[0027] In the figure, 1, frame; 2, lifting module; 3, drilling mechanism; 31, drilling motor; 32, machine head; 33, grinding head; 331, grinding surface; 34, drill bit; 4, auxiliary clamping mechanism; 41, mounting plate; 42, mechanism body; 43, fixed seat; 44, chuck; 45, auxiliary positioning part; 5, positioning mechanism; 51, base; 52, support column; 53, pressing cylinder; 54, inner support column; 55, elastic part; 56, auxiliary support part; 561, ventilation hole; 6, center hub; 7, sliding seat. Detailed Embodiment

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0029] Such as Figure 1As shown in the figure, a preferred embodiment of the present utility model proposes an automatic positioning drilling device, which mainly includes a frame 1, a lifting module 2, a drilling mechanism 3, a positioning mechanism 5 and an auxiliary clamping mechanism 4 installed on the frame 1.

[0030] The lifting module 2 is vertically fixed on the frame 1. The lifting of the lifting module 2 can be controlled by a servo motor - lead screw, or by a cylinder, or other structures that can achieve lifting.

[0031] Reference Figure 2 As shown in the figure, a sliding seat 7 is installed on the lifting module 2. The drilling mechanism 3 is installed on the sliding seat 7 and is controlled by the lifting module 2 to move up and down to drill the center hub 6 below.

[0032] Reference Figure 3 As shown in the figure, the drilling mechanism 3 is composed of a drilling motor 31, a machine head 32, a grinding head 33 and a drill bit 34. The drilling motor 31 is vertically and fixedly installed on the sliding seat 7. The machine head 32 is installed at the lower end of the drilling motor 31. Both the grinding head 33 and the drill bit 34 are installed on the machine head 32, and the drill bit 34 and the grinding head 33 are driven to rotate by the drilling motor 31.

[0033] The bottom surface of the grinding head 33 has a grinding surface 331, and the grinding surface 331 is a plane. At the same time, there is a through - hole penetrating through the middle of the grinding head 33. After the drill bit 34 is installed on the machine head 32, it passes through the through - hole and extends downward for a certain length. The head shape of the drill bit 34 is similar to a trapezoid, and a frustum - shaped positioning hole can be drilled on the center hub 6 during drilling. When the lifting module 2 controls the drilling mechanism 3 to move downward, when the drill bit 34 drills to a certain depth, the grinding head 33 will contact the surface of the center hub 6 and polish the surface, making the center hub 6 flat and smooth.

[0034] As Figure 5 As shown in the figure, the positioning mechanism 5 is located directly below the drilling mechanism 3 and is used to position the center hub 6. The positioning mechanism 5 is composed of a base 51, a support column 52, a pressing cylinder 53, a top rod (not shown in the figure) and three inner support columns 54. The base 51 is fixed on the frame 1, and the pressing cylinder 53 is fixed at the bottom of the frame 1, and the output end of the pressing cylinder 53 is connected to the top rod. The support column 52 is fixed on the top of the base 51, and there is an up - and - down through - penetrating insertion hole in the center of the support column 52 and the base 51. The shape of the insertion hole is similar to a cone, and the upper end shape of the top rod is also a cone, and the two are matched.

[0035] The three inner support columns 54 are evenly distributed in the circumferential direction near the upper side of the support column 52. Three circular holes with equal spacing are arranged in the circumferential direction on the outer side of the support column 52. The circular holes communicate with the insertion holes on the inner side of the support column 52. The inner support columns 54 are inserted into the circular holes, and at the same time, the inner support columns 54 and the ejector rod are in inclined surface cooperation. When the lifting cylinder controls the ejector rod to move upward, under the cooperation of the inclined surface, the ejector rod will control the three inner support columns 54 to move radially synchronously, so as to expand, position and fix the central hub 6 located on the support column 52 outward.

[0036] Since the thicker end of the central hub 6 has a blind hole, the support column 52 can be inserted into the blind hole, and the central hub 6 is fixed by the telescopic movement of the three inner support columns 54.

[0037] There is also an auxiliary support member 56 at the top of the support column 52. The shape of the auxiliary support member 56 is cylindrical, with a through hole in the middle. At the same time, there are ventilation holes 561 on the outer edge surface of the auxiliary support member 56. The auxiliary support member 56 will support the central hub 6. Since the ejector rod will move upward a certain distance during the upward movement, in order to prevent the ejector rod from hitting the central hub 6, the auxiliary support member 56 is specially designed. After passing through the support column 52, the ejector rod will penetrate into the auxiliary support member 56, thus avoiding direct contact with the auxiliary support member 56.

[0038] Since the space inside the support column 52 shrinks when the ejector rod moves upward, the excess air inside can be discharged through the ventilation holes 561 on the auxiliary support member 56.

[0039] In other technical solutions, the lifting cylinder can also be replaced by a hydraulic cylinder, so that the power is greater.

[0040] The three inner support columns 54 move radially outward under the action of the ejector rod. When the ejector rod moves downward, in order to ensure that the three inner support columns 54 can return to their original positions, a notch is provided on the front end face of each inner support column 54, and an elastic member 55 is arranged on the periphery of the support column 52. The elastic member 55 is a circular spring, and the circular spring passes through the notches at the front ends of the three inner support columns 54 in turn to hoop the three inner support columns 54. When the ejector rod controls the three inner support columns 54 to move outward, the circular spring will be stretched by force. When the ejector rod moves downward, the three inner support columns 54 return to their original positions under the action of the circular spring, thus loosening the central hub 6.

[0041] In other technical solutions, the circular spring can also be replaced by three tension springs. The three tension springs connect the three inner support columns 54 in turn, and the function is the same. Of course, the elastic member 55 can also be made of other elastic materials.

[0042] The support column 52 is coaxial with the drill bit 34 above to ensure that the positioning hole drilled at the thinner end of the central hub 6 is coaxial with the blind hole existing at the thicker end.

[0043] As Figure 4 shown, the auxiliary clamping mechanism 4 is located between the drilling mechanism 3 and the positioning mechanism 5, and is used for precisely positioning the central hub 6 and clamping the central hub 6 at the same time.

[0044] The auxiliary clamping mechanism 4 mainly consists of a mounting plate 41, a mechanism body 42, a fixed seat 43, a clamping cylinder (not shown in the figure), a chuck 44 and an auxiliary positioning member 45. Among them, the mounting plate 41 is vertically fixed on the frame 1 by bolts, and a strip hole is opened on the mounting plate 41, and the strip hole extends vertically. The mechanism body 42 is horizontally fixed on the mounting plate 41 by bolts, and the vertical height of the mechanism body 42 can be adjusted through the strip hole to adapt to the clamping of the central hub 6 with different heights.

[0045] There are two fixed seats 43, both of which are fixed on the mechanism body 42. The two fixed seats 43 are arranged oppositely, and there is a certain gap between the two fixed seats 43 to form a clamping space. There is a certain space inside each fixed seat 43 for installing the clamping cylinder. The output end of the clamping cylinder is fixedly connected to the chuck 44. The two chucks 44 are respectively located on the opposite sides of the two fixed seats 43 and are connected to the fixed seats 43 in an interpenetrating manner. The two clamping cylinders can control the two chucks 44 to extend into the clamping space, so as to clamp the upper end (i.e., the thinner end) of the central hub 6 to ensure that the central hub 6 will not rotate randomly during drilling.

[0046] The auxiliary clamping mechanism 4 and the positioning mechanism 5 cooperate to clamp and fix the upper and lower ends of the central hub 6 to ensure that the central hub 6 is coaxial with the drill bit 34 and the support column 52, and improve the processing accuracy.

[0047] On the opposite sides of the two chucks 44, there are V-shaped positioning grooves to meet the clamping of the central hub 6 with different sizes, and at the same time, it can also play a positioning role.

[0048] There are two auxiliary positioning members 45, which are respectively installed on the two fixed seats 43. The front ends of the auxiliary positioning members 45 are bent at a certain angle, so that there is a certain included angle between the front ends of the two auxiliary positioning members 45, presenting a V shape, so as to assist in positioning the upper end of the central hub 6. The upper end of the central hub 6 abuts against the V-shaped area between the two auxiliary positioning members 45, and then the two chucks 44 clamp the central hub 6.

[0049] There are oblong holes on the auxiliary positioning members 45. The auxiliary positioning members 45 are fixed on the top of the fixed seats 43 by screws, and the distance between the two auxiliary positioning members 45 can be adjusted through the oblong holes to meet the positioning of the central hub 6 with different sizes.

[0050] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present utility model. Some changes that those skilled in the art may make to some parts thereof all reflect the principles of the present utility model and fall within the protection scope of the present utility model.

Claims

1. An automatic positioning drilling device, characterized in that: include: A drilling mechanism (3), wherein the drilling mechanism (3) has a rotatable drill bit (34); A lifting module (2), wherein the drilling mechanism (3) is mounted on the lifting module (2) to control the drilling mechanism (3) to move up and down; A positioning mechanism (5), the positioning mechanism (5) being located below the drilling mechanism (3), the positioning mechanism (5) comprising a support column (52), at least three inner support columns (54) arranged on the outer circumference of the support column (52) and capable of telescopic movement along the radial direction of the support column (52), and a push rod for controlling the telescopic movement of the inner support column (54), the support column (52) having an interpenetrating hole in the middle, the push rod being located in the interpenetrating hole and being matched with the inner support column (54) in an inclined plane, the support column (52) being coaxial with the drill bit (34); An auxiliary clamping mechanism (4), the auxiliary clamping mechanism (4) is located between the drilling mechanism (3) and the positioning mechanism (5), the auxiliary clamping mechanism (4) comprises two chucks (44) arranged opposite to each other, and the opposite sides of the two chucks (44) have positioning grooves for clamping and positioning the product to be processed.

2. The automatic positioning drilling device according to claim 1, characterized in that: It also comprises a frame (1), the lifting module (2) is vertically fixed on the frame (1), a sliding seat (7) is installed on the lifting module (2), and the drilling mechanism (3) is fixedly installed on the sliding seat (7).

3. The automatic positioning drilling device according to claim 2, characterized in that: The drilling mechanism (3) further comprises a drilling motor (31), a machine head (32) mounted on the drilling motor (31), and a grinding head (33) mounted at the lower end of the machine head (32); the bottom of the grinding head (33) has a grinding surface (331); the middle of the grinding head (33) has a through hole; the drill bit (34) is mounted on the machine head (32) and extends downward through the through hole.

4. The automatic positioning drilling device according to claim 2, characterized in that: The positioning mechanism (5) further comprises a base (51) and a top-pressing cylinder (53) located below the base (51); the top-pressing cylinder (53) is vertically fixed to the bottom of the frame (1); the support column (52) is fixed to the base (51); the push rod is connected to the output end of the top-pressing cylinder (53) and passes through the base (51) and the support column (52) in sequence.

5. The automatic positioning drilling device according to claim 4, characterized in that: The top of the support column (52) is provided with an auxiliary support member (56), the middle of the auxiliary support member (56) is provided with a through hole connected to the through hole in the middle of the support column (52), and the outer edge surface of the auxiliary support member (56) is provided with a vent hole (561).

6. The automatic positioning drilling device according to claim 5, characterized in that: The end surface of the inner support column (54) has a notch, and an elastic member (55) is arranged in the notch to clamp the three inner support columns (54) in sequence.

7. The automatic positioning drilling device according to claim 2, characterized in that: The auxiliary clamping mechanism (4) also includes a mounting plate (41) fixedly mounted on the frame (1), a mechanism body (42) mounted on the mounting plate (41), two fixing seats (43) arranged on the mechanism body (42), and two clamping cylinders respectively arranged on the inner sides of the fixing seats (43), the two fixing seats (43) being arranged opposite to each other, and a clamping space for clamping the product to be processed is formed between the two fixing seats (43), the opposite sides of the two fixing seats (43) are provided with through holes, and the output end of the clamping cylinder is connected to the chuck (44).

8. The automatic positioning drilling device according to claim 7, characterized in that: The mounting plate (41) is provided with a strip-shaped hole, the strip-shaped hole extending up and down, and the mechanism body (42) is fixed to the mounting plate (41) by means of bolts.

9. The automatic positioning drilling device according to claim 8, characterized in that: Each fixing seat (43) is provided with an auxiliary positioning piece (45), the front end of the auxiliary positioning piece (45) extends above the clamping head (44), and a V-shaped positioning angle is formed between the two auxiliary positioning pieces (45).

10. The automatic positioning drilling device according to claim 9, characterized in that: The auxiliary positioning member (45) has an oblong hole, and the auxiliary positioning member (45) is fixed to the fixing seat (43) by means of bolts.

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