Clamping tool and method for head drilling of hexagonal head bolt product

Abstract

The invention relates to the technical field of bolt machining, in particular to a clamping tool and method for drilling holes in the head of a hexagonal head bolt product, and the clamping tool comprises a bottom plate, a support body and a sliding block; the support body is mounted on the top surface of the bottom plate; a supporting block and a door-shaped frame are integrally formed on the top face of the support body. The supporting blocks and the door-shaped frame are arranged at intervals to form air opening grooves. A plurality of V-shaped grooves are formed in the top surface of the supporting block; a plurality of pressing plates are installed on the top face of the supporting block through compression screws, and each V-shaped groove is correspondingly provided with one pressing plate. The sliding block is inserted into the door-shaped frame in a sliding mode, and the front end of the sliding block extends into the air switch groove. A plurality of hexagonal grooves are formed in the top face of the sliding block, and the positions of the hexagonal grooves correspond to the positions of the V-shaped grooves.

Description

Technical Field

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

[0002] Hex head bolts are widely used in the machinery manufacturing industry. A hex head bolt consists of two parts: a head and a shank. The head is hexagonal, and the shank has external threads. The head is typically either an external hex head or an internal hex head; the external hex head is the most widely used, while the internal hex head is suitable for applications requiring internal tightening. Drilling holes in the head of a hex head bolt is a common procedure.

[0003] When drilling holes in the head of a hexagonal head bolt, a clamping fixture is required to hold the bolt for easier processing. In the prior art, patent application CN107649902A discloses a drilling fixture for a twelve-head bolt, which uses pressure blocks to press the bolt to be processed onto a base, thus clamping it and facilitating drilling of the bolt head.

[0004] However, in the aforementioned prior art, the fixture can only hold one bolt, which seriously affects the processing efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a clamping fixture and method for drilling holes in the head of hexagonal head bolts, in order to solve the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides a clamping fixture for drilling holes in the head of hexagonal head bolts, comprising a base plate, a support body, and a sliding block; the support body is mounted on the top surface of the base plate; a support block and a portal frame are integrally formed on the top surface of the support body; and the support block and the portal frame are spaced apart to form open slots; multiple V-grooves are provided on the top surface of the support block; multiple pressure plates are mounted on the top surface of the support block by clamping screws, with one pressure plate corresponding to each V-groove; the sliding block is slidably inserted into the portal frame, and the front end of the sliding block extends into the open slot; multiple hexagonal grooves are provided on the top surface of the sliding block, and the positions of the hexagonal grooves correspond to the positions of the V-grooves.

[0007] Preferably, a handle is installed on the rear side of the sliding block.

[0008] Preferably, an arc-shaped groove is provided on the lower surface of the pressure plate.

[0009] Preferably, U-shaped grooves are provided at both ends of the pressure plate, with the opening of one U-shaped groove located on the long side of the pressure plate and the opening of the other U-shaped groove located on the end face of the pressure plate; the screw of the clamping screw passes through the U-shaped groove and is screwed into the screw hole on the top surface of the support block.

[0010] Preferably, two guide blocks are provided on the lower surface of the sliding block; two guide grooves are formed on the top surface of the support body; the guide blocks slide in cooperation with the guide grooves.

[0011] Preferably, a set screw hole is provided on the end face of the support body, and a tightening screw is screwed into the set screw hole to tighten against the side of the guide block.

[0012] Preferably, mounting grooves are provided at both ends of the base plate.

[0013] Preferably, a plurality of triangular blocks are integrally formed on the crossbeam of the portal frame, and the triangular blocks extend into the hexagonal groove; each triangular block is provided with a threaded hole for installing a positioning screw, and the screw of the positioning screw extends into the open slot.

[0014] Preferably, there are four V-grooves, which are arranged alternately from left to right; the included angle between the two sides of the hexagonal groove is 60°.

[0015] On the other hand, the present invention also proposes a method for drilling holes in the head of hexagonal head bolts, using the above-mentioned clamping fixture, including the following steps: S1. Install the clamping fixture on the worktable of the CNC drilling machine; S2. Clamp multiple hexagonal head bolts to be processed in a clamping fixture, so that the screw part of the product is placed flat on the V-groove and the head of the product is located in the open slot. S3. Adjust the position of the sliding block back and forth so that the hexagonal groove on the sliding block supports the head of the product, and the front end face of the sliding block and the rear end face of the support block are spaced apart to form a clearance groove. When drilling, the drill bit can be inserted into the clearance groove between the front end face of the sliding block and the rear end face of the support block. S4. Install the pressure plate and use the pressure plate to tighten the screw part of the product; S5. Start the drilling machine and drill holes in the hexagonal head bolts on the clamping fixture in sequence.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) By using the clamping fixture provided by the present invention, multiple hexagonal head bolt products to be processed can be clamped at one time, which is conducive to improving processing efficiency.

[0017] (2) By using the clamping fixture provided by the present invention, after the first product is processed, the drilling machine can continue to process the head of the second product to be processed. During the processing of the head of the second product, the finished product in the previous clamping position can be disassembled and removed and a new product to be processed can be clamped. In this way, the equipment can achieve continuous processing of products without waiting time.

[0018] (3) In this invention, a sliding block is slidably inserted into the door frame, and the hexagonal groove on the sliding block forms a support for the head of the product. While providing support, it also restricts the angular orientation of the product head, preventing the hexagonal head bolt product from rotating around its own axis during drilling. In addition, since the position of the sliding block can be adjusted forward and backward, in actual use, in order to avoid interference between the sliding block and the drill bit, the forward and backward position of the sliding block is adjusted so that the front end face of the sliding block and the rear end face of the support block are spaced apart to form a clearance groove. When drilling, the drill bit can be inserted into the clearance groove between the front end face of the sliding block and the rear end face of the support block. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a three-dimensional structural diagram of the clamping fixture provided by the present invention; Figure 2 This is a front view of the clamping fixture provided by the present invention; Figure 3 This is a front view of the support body in this invention; Figure 4 This is a top view of the support body in this invention; Figure 5 This is a left view of the support body in this invention; Figure 6 This is a front view of the sliding block in this invention; Figure 7 This is a top view of the sliding block in this invention; Figure 8 This is a left view of the sliding block in this invention; Figure 9 This is a front view of the base plate in this invention; Figure 10 This is a top view of the base plate in this invention; Figure 11 This is a front view of the pressure plate in this invention; Figure 12 This is a top view of the pressure plate in this invention.

[0021] Explanation of reference numerals: 1. Base plate; 1a. Mounting groove; 2. Support body; 2a. Support block; 2b. Door frame; 2c. V-groove; 2d. Opening groove; 2e. Guide groove; 2f. Top screw hole; 2g. Triangular block; 2h. Threaded hole; 3. Pressure plate; 3a. Arc-shaped groove; 3b. U-shaped groove; 4. Sliding block; 4a. Hexagonal groove; 4b. Guide block; 5. Handle; 6. Tightening screw. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] Referring to the accompanying drawings, this embodiment provides a clamping fixture for drilling holes in the head of hexagonal head bolts, including a base plate 1, a support body 2, and a sliding block 4. The support body 2 is mounted on the top surface of the base plate 1 by means of screw connection. A support block 2a and a portal frame 2b are integrally formed on the top surface of the support body 2; and the support block 2a and the portal frame 2b are spaced apart to form an open slot 2d.

[0025] Multiple V-grooves 2c are provided on the top surface of the support block 2a; multiple pressure plates 3 are installed on the top surface of the support block 2a by clamping screws 6, with one pressure plate 3 corresponding to each V-groove 2c. The V-grooves 2c are used to place the threaded part of the hexagonal head bolt product to be processed, and the pressure plates 3 are used to clamp the threaded part of the product.

[0026] The sliding block 4 is slidably inserted into the portal frame 2b, and the front end of the sliding block 4 extends into the open slot 2d. Multiple hexagonal slots 4a are provided on the top surface of the sliding block 4, and the positions of the hexagonal slots 4a correspond to the positions of the V-shaped slots 2c. In actual use, the hexagonal slots 4a are used to support the head of the hexagonal head bolt product to be processed. The hexagonal slots 4a serve two purposes: firstly, to support the product head, and secondly, to limit the angular orientation of the product head.

[0027] A handle 5 is installed on the rear side of the sliding block 4. The purpose of the handle 5 is to facilitate pulling the sliding block 4.

[0028] Combination Figure 11 As shown, an arc-shaped groove 3a is provided on the lower surface of the pressure plate 3. When the screw part of the hexagonal head bolt product is tightened, the screw part of the product is located in the arc-shaped groove 3a. The arc-shaped groove 3a and the V-shaped groove 2c together form a receiving space for the screw part of the product.

[0029] Combination Figure 12 As shown, U-shaped grooves 3b are respectively provided at both ends of the pressure plate 3. The opening of one U-shaped groove 3b is located on the long side of the pressure plate 3, and the opening of the other U-shaped groove 3b is located on the end face of the pressure plate 3. The screw of the clamping screw 6 passes through the U-shaped groove 3b and is screwed into the screw hole on the top surface of the support block 2a. The two U-shaped grooves 3b have different opening orientations. When disassembling the pressure plate 3, it is only necessary to loosen the clamping screw 6 to remove the pressure plate 3. That is, the clamping screw 6 can be detached from the support block 2a to remove the pressure plate 3.

[0030] Combination Figure 1 and Figure 6 As shown, two guide blocks 4a are provided on the lower surface of the sliding block 4; two guide grooves 2e are provided on the top surface of the support body 2; the guide blocks 4a and the guide grooves 2e slide in cooperation to play a guiding role, so that the sliding block 4 can slide smoothly.

[0031] Combination Figure 1 As shown, a set screw hole 2f is provided on the end face of the support body 2, and a tightening screw (not shown in the figure) is screwed into the set screw hole 2f to tighten against the side of the guide block 4a. When the sliding block 4 slides back and forth to a suitable position, the position of the sliding block 4 can be fixed by tightening the tightening screw to prevent the sliding block 4 from sliding on its own during the drilling process.

[0032] Combination Figure 1 As shown, mounting grooves 1a are provided at both ends of the base plate 1. The purpose of providing mounting grooves 1a is to facilitate fixing the base plate 1 to the worktable of the CNC drilling machine.

[0033] Combination Figure 2As shown, multiple triangular blocks 2g are integrally formed on the crossbeam of the portal frame 2b, and the triangular blocks 2g extend into the hexagonal groove 4a. Each triangular block 2g has an M10 threaded hole 2h for installing a positioning screw (not shown in the figure), and the screw shank of the positioning screw extends into the open slot 2d. By rotating the positioning screw, the axial position of the positioning screw can be adjusted, thereby adjusting the length of its shank extending into the open slot 2d. In use, the end face of the head of the hexagonal head bolt to be processed abuts against the end face of the screw shank, thus providing axial positioning for the hexagonal head bolt to be processed.

[0034] In this embodiment, there are four V-shaped grooves 2c, which are arranged alternately from left to right; the included angle between the two sides of the hexagonal groove 4a is 60°.

[0035] On the other hand, this embodiment also provides a method for drilling holes in the head of a hexagonal head bolt product, using the above-mentioned clamping fixture, including the following steps: S1. Install the clamping fixture on the worktable of the CNC drilling machine; specifically, use the mounting groove 1a on the base plate 1 to fix the clamping fixture on the worktable of the CNC drilling machine by bolt fixing.

[0036] S2. Clamp multiple hexagonal head bolts to be processed in a clamping fixture, so that the screw part of the product is placed flat on the V-groove 2c and the head of the product is located in the open slot 2d.

[0037] S3. Adjust the position of the sliding block 4 back and forth so that the hexagonal groove 4a on the sliding block 4 supports the head of the product, and that the front end face of the sliding block 4 and the rear end face of the support block 2a are spaced apart to form a clearance groove (i.e., in... Figure 1 The clearance groove is formed at position A in the middle. When drilling, the drill bit can be inserted into the clearance groove between the front end face of the sliding block 4 and the rear end face of the support block 2a.

[0038] S4. Install the pressure plate 3 and use the pressure plate 3 to press the screw part of the product; S5. Start the drilling machine and drill holes in the hexagonal head bolts on the clamping fixture in sequence.

[0039] In addition, in step S2, to axially position the hexagonal head bolt product to be processed, a positioning screw (not shown in the figure) is screwed into the threaded hole 2h of the triangular block 2g, and the screw shank of the positioning screw extends into the open slot 2d. By rotating the positioning screw, the axial position of the positioning screw can be adjusted, thereby adjusting the length of its screw extending into the open slot 2d. The end face of the head of the hexagonal head bolt product to be processed abuts against the end face of the screw shank, thereby providing axial positioning for the hexagonal head bolt product.

[0040] In step S3, when the front and rear positions of the sliding block 4 are adjusted to the correct position, a tightening screw is screwed into the set screw hole 2f of the support body 2. By tightening the tightening screw, the guide block 4a is tightened to prevent the sliding block 4 from sliding on its own.

[0041] In step S5, after the first product is processed, the drilling machine can continue processing the head of the second product. During the processing of the second product head, the completed product can be removed from the previous clamping position and a new product to be processed can be clamped. This process can be repeated, enabling continuous processing of products without waiting time, improving the utilization rate of the drilling equipment, and reducing production costs.

[0042] 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 clamping fixture for drilling holes in the head of hexagonal head bolts, characterized in that, It includes a base plate (1), a support body (2), and a sliding block (4); The support body (2) is installed on the top surface of the base plate (1); A support block (2a) and a portal frame (2b) are integrally formed on the top surface of the support body (2); and the support block (2a) and the portal frame (2b) are spaced apart to form an open slot (2d); Multiple V-grooves (2c) are provided on the top surface of the support block (2a); Multiple pressure plates (3) are installed on the top surface of the support block (2a) by clamping screws (6), and each V-groove (2c) is provided with a corresponding pressure plate (3); The sliding block (4) is slidably inserted into the door frame (2b), and the front end of the sliding block (4) extends into the open slot (2d); Multiple hexagonal grooves (4a) are provided on the top surface of the sliding block (4), and the positions of the hexagonal grooves (4a) correspond to the positions of the V-shaped grooves (2c).

2. The clamping fixture according to claim 1, characterized in that, A handle (5) is installed on the rear side of the sliding block (4).

3. The clamping fixture according to claim 1, characterized in that, An arc-shaped groove (3a) is provided on the lower surface of the pressure plate (3).

4. The clamping fixture according to claim 1, characterized in that, U-shaped grooves (3b) are provided at both ends of the pressure plate (3). The opening of one U-shaped groove (3b) is located on the long side of the pressure plate (3), and the opening of the other U-shaped groove (3b) is located on the end face of the pressure plate (3). The screw of the clamping screw (6) passes through the U-shaped groove (3b) and is screwed into the screw hole on the top surface of the support block (2a).

5. The clamping fixture according to claim 1, characterized in that, Two guide blocks (4a) are provided on the lower surface of the sliding block (4); two guide grooves (2e) are opened on the top surface of the support body (2); the guide block (4a) and the guide groove (2e) slide in cooperation.

6. The clamping fixture according to claim 1, characterized in that, A set screw hole (2f) is provided on the end face of the support body (2), and a tightening screw is screwed into the set screw hole (2f) to tighten against the side of the guide block (4a).

7. The clamping fixture according to claim 1, characterized in that, Mounting grooves (1a) are provided at both ends of the base plate (1).

8. The clamping fixture according to claim 1, characterized in that, Multiple triangular blocks (2g) are integrally formed on the crossbeam of the portal frame (2b), and the triangular blocks (2g) extend into the hexagonal groove (4a); each triangular block (2g) is provided with a threaded hole (2h) for installing a positioning screw, and the screw of the positioning screw extends into the open slot (2d).

9. The clamping fixture according to claim 1, characterized in that, The number of V-grooves (2c) is four, and the four V-grooves (2c) are arranged alternately from left to right; the included angle between the two sides of the hexagonal groove (4a) is 60°.

10. A method for drilling holes in the head of a hexagonal head bolt product, characterized in that, The clamping fixture according to any one of claims 1 to 9 comprises the following steps: S1. Install the clamping fixture on the worktable of the CNC drilling machine; S2. Clamp multiple hexagonal head bolts to be processed in a clamping fixture, so that the screw part of the product is placed flat on the V-groove (2c) and the head of the product is located in the open slot (2d); S3. Adjust the position of the sliding block (4) back and forth so that the hexagonal groove (4a) on the sliding block (4) supports the head of the product, and the front end face of the sliding block (4) and the rear end face of the support block (2a) are spaced apart to form a clearance groove. When drilling, the drill bit can be inserted into the clearance groove between the front end face of the sliding block (4) and the rear end face of the support block (2a). S4. Install the pressure plate (3) and use the pressure plate (3) to press the screw part of the product; S5. Start the drilling machine and drill holes in the hexagonal head bolts on the clamping fixture in sequence.

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