Supporting tool and method for drilling head of bolt product

Abstract

The invention relates to the technical field of bolt machining, in particular to a supporting tool and method for drilling holes in the head of a bolt product, and the supporting tool comprises a base, a height adjusting mechanism and a supporting block; the height adjusting mechanism is mounted on the base; the supporting block is mounted on the height adjusting mechanism, and the height adjusting mechanism is used for adjusting the height of the supporting block; a positioning groove is formed in the supporting block and used for being matched with the head of a bolt product to be machined. By means of the supporting tool, the head of a cantilever-shaped to-be-machined bolt product can be effectively supported, and the bolt product can be prevented from inclining when the head of the bolt product is drilled. The positioning groove is matched with the head of the to-be-machined bolt product, the function of determining the angular direction of the head of the to-be-machined bolt product can be achieved, in the clamping process, a dial indicator does not need to be used for horizontally aligning the head of the bolt and then clamping the head of the bolt, the clamping time is saved, and the clamping efficiency can be remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of bolt processing technology, and in particular to a support fixture and method for drilling holes in the head of bolt products. Background Technology

[0002] Bolts are widely used and generally consist of a head and a shank. They can be used with nuts to fasten two parts with through holes. Some bolts require a radial hole drilled in the head.

[0003] The existing drilling method mainly uses a vertical drilling machine for drilling. A three-jaw chuck is installed on the worktable of the drilling machine, and the axis of the three-jaw chuck is horizontal. During drilling, the bolt shank is pre-clamped by the three-jaw chuck. At this time, the bolt is horizontal. The head is leveled by a dial indicator and then the three-jaw chuck is clamped to the bolt shank before drilling is performed.

[0004] The above drilling method has the following problems: (1) The bolt shank is clamped by a three-jaw chuck. At this time, the bolt is in a cantilever shape. When drilling the head of the bolt product, the bolt is prone to tilting, which causes the axis of the drilled radial hole to be non-perpendicular to the bolt axis, affecting the processing accuracy.

[0005] (2) Since it is necessary to use a dial indicator to level the bolt head before clamping, the position needs to be repeatedly calibrated during the alignment process, which results in a lot of time being spent on each clamping.

[0006] Due to the aforementioned problems, the efficiency bottleneck becomes even more pronounced when processing batches of products.

[0007] Therefore, a support fixture and method for drilling holes in the head of bolt products are provided to overcome the above-mentioned problems. Summary of the Invention

[0008] The main objective of this invention is to provide a support fixture and method for drilling holes in the head of bolt products, aiming to solve the aforementioned technical problems.

[0009] To achieve the above objectives, on the one hand, the present invention proposes a support fixture for drilling holes in the head of bolt products, including a base, a height adjustment mechanism, and a support block; the height adjustment mechanism is mounted on the base; the support block is mounted on the height adjustment mechanism, and the height adjustment mechanism is used to adjust the height of the support block; a positioning groove is provided on the support block for cooperating with the head of the bolt product to be processed.

[0010] Preferably, the base includes a horizontal plate and a vertical plate welded to the horizontal plate; two bolt holes are provided on the horizontal plate; the horizontal plate is used to mount on the worktable of a vertical drilling machine.

[0011] Preferably, the height adjustment mechanism includes a guide block, guide posts, and a crossbeam plate; the guide block is installed on the front side of the vertical plate; two vertical guide holes are provided on the guide block; there are two guide posts, which are slidably inserted into the guide holes respectively; the top ends of the two guide posts are connected to the crossbeam plate; the support block is installed on the top surface of the crossbeam plate, and the two are detachably connected; a locking mechanism is provided on the guide block for locking the guide posts after the height adjustment is completed.

[0012] Preferably, the locking mechanism includes a set screw hole provided on the side of the guide block and a tightening screw screw screwed into the set screw hole; the tightening screw screw is used to tighten the guide post.

[0013] Preferably, two set screw holes are provided on the left and right sides of the guide block, and the two set screw holes on each side are spaced apart vertically; a tightening screw is screwed into each set screw hole.

[0014] Preferably, mounting plates are integrally formed on the left and right sides of the guide block, and multiple screw holes are provided on the mounting plates. The mounting plates are connected to the vertical plate by bolts.

[0015] Preferably, the positioning groove is a semi-hexagonal groove, with the top and front sides of the positioning groove being open and the rear side being closed; and gaskets of different thicknesses are provided on the positioning groove.

[0016] Optionally, the positioning groove is a semi-dodecagonal groove.

[0017] Preferably, the support block is provided with two countersunk through holes; the crossbeam plate is provided with two threaded holes; the support block and the crossbeam plate are connected by screws, the screws passing through the countersunk through holes and screwed into the threaded holes.

[0018] On the other hand, the present invention also proposes a method for drilling holes in the head of bolt products, using the above-mentioned support fixture, including the following steps: S1. Install the support fixture and the three-jaw chuck on the worktable of the vertical drilling machine, and make sure that the axis of the three-jaw chuck is horizontal. S2. Adjust the height of the support block; S3. Insert the bolt product to be processed between the three jaws of the three-jaw chuck, without locking the three jaws; position the head of the bolt product into the positioning groove of the support block and determine the angular orientation of the head of the bolt product; then lock the three jaws of the three-jaw chuck. S4. Start the drilling machine and drill holes in the head of the bolt product to be processed.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) By utilizing the support fixture provided by the present invention, the head of the cantilever bolt product to be processed can be effectively supported. When drilling the head of the bolt product, the bolt product can be prevented from tilting, thereby ensuring that the axis of the drilled radial hole is not perpendicular to the bolt axis, which is beneficial to ensuring processing accuracy.

[0020] (2) In this invention, the positioning groove is used to cooperate with the head of the bolt product to be processed, which can determine the angular direction of the head of the bolt product to be processed. During the clamping process, it is not necessary to use a dial indicator to level the bolt head before clamping, which saves clamping time and can significantly improve clamping efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the support fixture provided in the first embodiment of the present invention.

[0023] Figure 2 This is a front view of the base in this invention.

[0024] Figure 3 This is a top view of the base in this invention.

[0025] Figure 4 This is a right view of the base in this invention.

[0026] Figure 5 This is the front view of the guide block in this invention.

[0027] Figure 6 This is a top view of the guide block in this invention.

[0028] Figure 7 This is a left view of the guide block in this invention.

[0029] Figure 8 This is a front view of the crossbeam plate and guide column after assembly in this invention.

[0030] Figure 9 This is a left view of the crossbeam plate and guide column assembled in this invention.

[0031] Figure 10 This is a front view of the support block in the first embodiment of the present invention.

[0032] Figure 11 This is a top view of the support block in the first embodiment of the present invention.

[0033] Figure 12 This is a left view of the support block in the first embodiment of the present invention.

[0034] Figure 13 This is a front view of the gasket in the first embodiment of the present invention.

[0035] Figure 14 This is a top view of the gasket in the first embodiment of the present invention.

[0036] Figure 15 This is a three-dimensional structural diagram of the support fixture provided in the second embodiment of the present invention.

[0037] Explanation of reference numerals: 1. Base; 101. Horizontal plate; 101a. Bolt through hole; 102. Vertical plate; 2. Height adjustment mechanism; 201. Guide block; 201a. Guide hole; 201b. Set screw hole; 201c. Mounting plate; 202. Guide column; 203. Crossbeam plate; 203a. Threaded hole; 204. Tightening screw; 3. Support block; 3a. Positioning groove; 3b. Countersunk through hole; 4. Gasket. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0040] Example 1: Combination Figures 1 to 14 As shown, in a first aspect, this embodiment provides a support fixture for drilling holes in the head of a bolt product, including a base 1, a height adjustment mechanism 2, and a support block 3; the height adjustment mechanism 2 is mounted on the base 1; the support block 3 is mounted on the height adjustment mechanism 2, and the height adjustment mechanism 2 is used to adjust the height of the support block 3. A positioning groove 3a is provided on the support block 3 for engaging with the head of the bolt product to be processed.

[0041] Secondly, this embodiment also provides a method for drilling holes in the head of a bolt product, using the aforementioned support fixture, including the following steps: S1. Install the support fixture and three-jaw chuck on the worktable of the vertical drilling machine, and the axis of the three-jaw chuck is horizontal.

[0042] S2. Adjust the height of support block 3.

[0043] S3. Insert the bolt product to be processed between the three jaws of the three-jaw chuck, without locking the three jaws; position the head of the bolt product into the positioning groove 3a of the support block 3 and determine the angular orientation of the head of the bolt product; then lock the three jaws of the three-jaw chuck.

[0044] S4. Start the drilling machine and drill holes in the head of the bolt product to be processed.

[0045] By employing the aforementioned support fixture, effective support can be provided for the cantilevered head of the bolt product to be processed. This prevents the bolt from tilting during drilling, ensuring that the axis of the drilled radial hole is not perpendicular to the bolt axis, thus guaranteeing processing accuracy. Furthermore, the positioning groove 3a, in conjunction with the head of the bolt product, determines the angular orientation of the bolt head. During clamping, it eliminates the need for leveling the bolt head using a dial indicator before clamping, saving clamping time and significantly improving clamping efficiency.

[0046] The three-jaw chuck is a standard existing device and will not be described in detail here.

[0047] Combination Figures 2 to 4 As shown, the base 1 includes a horizontal plate 101 and a vertical plate 102 welded to the horizontal plate 101; two bolt holes 101a are provided on the horizontal plate 101; the horizontal plate 101 is used to connect with the worktable of the vertical drilling machine. Specifically, the bolt holes 101a are used for bolt connection with the worktable of the drilling machine.

[0048] Combination Figures 5 to 9As shown, the height adjustment mechanism 2 includes a guide block 201, guide posts 202, and a crossbeam plate 203; the guide block 201 is installed on the front side of the vertical plate 102. Two vertical guide holes 201a are provided on the guide block 201; two guide posts 202 are slidably inserted into the guide holes 201a respectively. The top ends of the two guide posts 202 are connected to the crossbeam plate 203; specifically, the bottom surface of the crossbeam plate 203 is welded to the top surface of the guide posts 202. The support block 3 is installed on the top surface of the crossbeam plate 203, and the two are detachably connected; a locking mechanism is provided on the guide block 201 to lock the guide posts 202 after the height adjustment is completed.

[0049] Specifically, in combination Figure 1 and Figure 7 As shown, the locking mechanism includes a set screw hole 201b provided on the side of the guide block 201 and a tightening screw 204 screwed into the set screw hole 201b; the tightening screw 204 is used to tighten the guide post 202.

[0050] In step S2, the height adjustment method for support block 3 is as follows: First, insert the bolt to be processed between the three jaws of the three-jaw chuck and pre-tighten the three jaws (at this time, the bolt to be processed can also be manually rotated, i.e., a rotational force can be manually applied to make the bolt to be processed rotate around its own axis); lift support block 3 upwards by manual adjustment so that the head of the bolt to be processed is inserted into the positioning groove 3a of support block 3, and observe the fit between the outer side of the head of the bolt to be processed and the positioning groove 3a. If they do not fit, rotate the bolt to be processed slightly around its own axis, and simultaneously lift support block 3 until the outer side of the head of the bolt to be processed is completely fitted with the positioning groove 3a. At this time, the height of support block 3 is adjusted to the correct position, and the tightening screw 204 can be tightened to tighten the guide post 202. The height adjustment of support block 3 is completed through the above operations.

[0051] Combination Figure 1 and Figure 7 As shown, two set screw holes 201b are provided on the left and right sides of the guide block 201, and the two set screw holes 201b on each side are spaced vertically apart; a tightening screw 204 is screwed into each set screw hole 201b. When the guide post 202 moves upward, causing its lower end face to be higher than the lower set screw hole 201b, the guide post 202 can be tightened using only the tightening screw 207 in the upper set screw hole 201b. When the lower end of the guide post 202 is below the lower set screw hole 201b, the guide post 202 can be tightened simultaneously using the tightening screws 207 in both the upper and lower set screw holes 201b.

[0052] Combination Figure 1and Figure 6 As shown, mounting plates 201c are integrally formed on the left and right sides of the guide block 201, respectively. Multiple screw holes are provided on the mounting plates 201c, and the mounting plates 201c are connected to the vertical plate 102 by bolts. The mounting plates 201c serve two purposes: firstly, they facilitate bolt connection to the vertical plate 102; secondly, the thickness of the mounting plates 201c is much smaller than the thickness of the guide block 201, allowing for the use of shorter bolts for connection to the vertical plate 102.

[0053] In this first embodiment, the provided support fixture is used to support the head of the hexagonal head bolt. Therefore, the positioning groove 3a is set as a semi-hexagonal groove. The top and front sides of the positioning groove 3a are open, and the rear side is closed, forming a vertical sidewall A.

[0054] In step S3, when clamping the bolt to be processed, the bolt is first inserted between the three jaws of the three-jaw chuck without locking the jaws. Then, the bolt is moved backward so that its head is engaged in the positioning groove 3a of the support block 3, and the head abuts against the vertical side wall A of the positioning groove 3a. This provides axial positioning for the bolt. Furthermore, the engagement of the bolt head in the positioning groove 3a determines its angular orientation. Once the axial and angular positions of the bolt are determined, the three jaws of the three-jaw chuck can be locked.

[0055] When processing bolts with different head specifications, washers 4 of different thicknesses can be installed on the positioning groove 3a. When clamping the bolt to be processed, the outer side of the bolt head can be directly attached to the washer 4. The support fixture after assembling the washer 4 is used in a similar manner as described above, and will not be repeated here.

[0056] Combination Figure 8 and Figure 11 As shown, two countersunk through holes 3b are provided on the support block 3; two threaded holes 203a are provided on the crossbeam plate 203; the support block 3 and the crossbeam plate 203 are connected by screws, the screws pass through the countersunk through holes 3b and are screwed into the threaded holes 203a to form a detachable connection structure, so as to facilitate the replacement of support blocks 3 with positioning grooves 3a of different shapes.

[0057] Example 2: Combination Figure 15 As shown, this is a second embodiment of the support fixture provided by the present invention. In this second embodiment, the positioning groove 3a is a semi-dodecagonal groove. The remaining structure is the same as in the first embodiment, and will not be described again here.

[0058] The support fixture provided in Example 2 is used to support the head of the twelve-head bolt. The method of using the support fixture is the same as in Example 1, and will not be described again here.

[0059] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A support fixture for drilling holes in the head of bolt products, characterized in that, It includes a base (1), a height adjustment mechanism (2), and a support block (3); The height adjustment mechanism (2) is mounted on the base (1); the support block (3) is mounted on the height adjustment mechanism (2), and the height adjustment mechanism (2) is used to adjust the height of the support block (3); A positioning groove (3a) is provided on the support block (3) for engaging with the head of the bolt product to be processed.

2. The support fixture for drilling holes in the head of a bolt product according to claim 1, characterized in that, The base (1) includes a horizontal plate (101) and a vertical plate (102) welded to the horizontal plate (101); two bolt holes (101a) are provided on the horizontal plate (101); the horizontal plate (101) is used to connect with the worktable of a vertical drilling machine.

3. The support fixture for drilling holes in the head of a bolt product according to claim 2, characterized in that, The height adjustment mechanism (2) includes a guide block (201), a guide column (202), and a crossbeam plate (203); The guide block (201) is installed on the front side of the vertical plate (102); Two vertical guide holes (201a) are provided on the guide block (201); The number of guide posts (202) is two, which are slidably inserted into the guide holes (201a); The top ends of the two guide columns (202) are connected together to the crossbeam plate (203); The support block (3) is installed on the top surface of the crossbeam plate (203), and the two are detachably connected; A locking mechanism is provided on the guide block (201) for locking the guide post (202) whose height has been adjusted to the correct position.

4. A support fixture for drilling holes in the head of a bolt product according to claim 3, characterized in that, The locking mechanism includes a set screw hole (201b) provided on the side of the guide block (201) and a tightening screw (204) screwed into the set screw hole (201b); the tightening screw (204) is used to tighten the guide post (202).

5. A support fixture for drilling holes in the head of a bolt product according to claim 4, characterized in that, Two set screw holes (201b) are provided on the left and right sides of the guide block (201), and the two set screw holes (201b) on each side are spaced apart vertically; a tightening screw (204) is screwed into each set screw hole (201b).

6. A support fixture for drilling holes in the head of a bolt product according to claim 3, characterized in that, Mounting plates (201c) are integrally formed on the left and right sides of the guide block (201), and multiple screw holes are provided on the mounting plates (201c). The mounting plates (201c) are connected to the vertical plate (102) by bolts.

7. A support fixture for drilling holes in the head of a bolt product according to claim 1, characterized in that, The positioning groove (3a) is a semi-hexagonal groove. The top and front sides of the positioning groove (3a) are open, and the rear side is closed. Gaskets (4) of different thicknesses are provided on the positioning groove (3a).

8. A support fixture for drilling holes in the head of a bolt product according to claim 1, characterized in that, The positioning groove (3a) is a semi-dodecagonal groove.

9. A support fixture for drilling holes in the head of a bolt product according to claim 3, characterized in that, Two countersunk through holes (3b) are provided on the support block (3); Two threaded holes (203a) are provided in the crossbeam plate (203); The support block (3) is connected to the crossbeam plate (203) by screws, which pass through the countersunk hole (3b) and are screwed into the threaded hole (203a).

10. A method for drilling holes in the head of a bolt product, characterized in that, The support fixture according to any one of claims 1 to 9 comprises the following steps: S1. Install the support fixture and the three-jaw chuck on the worktable of the vertical drilling machine, and make sure that the axis of the three-jaw chuck is horizontal. S2. Adjust the height of the support block (3); S3. Insert the bolt product to be processed between the three jaws of the three-jaw chuck, without locking the three jaws first; insert the head of the bolt product to be processed into the positioning groove (3a) of the support block (3) for positioning, and determine the angular direction of the head of the bolt product to be processed; then lock the three jaws of the three-jaw chuck. S4. Start the drilling machine and drill holes in the head of the bolt product to be processed.

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