Drilling jig and processing method for chain link pin hole processing

Abstract

The present invention discloses a drill jig for processing chain link pin holes, comprising a drill jig body, the drill jig body being a square frame structure, a bottom plate being provided at the bottom of the drill jig body, two side plates being provided vertically along the length direction of the bottom plate, a top plate being provided correspondingly on top of the side plates, and drill sleeves being provided at both ends of the upper surface of the top plate. The present invention also discloses a method for processing chain link pin holes, wherein the above-mentioned drill jig for processing chain link pin holes is used to mount the chain link to be processed into the square frame structure of the drill jig body and clamp it; the drill jig body together with the chain link to be processed is clamped on the workbench of an ordinary drilling machine; the drill sleeve guides the drill bit and reamer to first drill pre-holes before reaming on the two pin holes to be processed on the chain link; and the pin holes are reamed. The present invention saves equipment, improves efficiency, and has a simple and easy processing method and is convenient to operate, thereby solving the problems of low efficiency and high cost in processing chain link pin holes in the prior art.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment manufacturing, and in particular relates to a drilling jig for machining chain link pin holes, and also relates to a machining method for the chain link pin holes. Background Art

[0002] In the medium and heavy plate cutting production line of a steel mill, finished steel plates are collected and stacked before being transported via a chain plate conveyor. In a chain plate conveyor, the chain link is a critical component of the conveyor chain, responsible for the traction and load-bearing capacity of the entire conveyor mechanism. It must possess high strength and wear resistance. Existing technology typically uses welding to produce chain links, which are numerous in the equipment. Because ordinary drilling machines cannot meet the precision requirements of the parts, the pin holes for the chain links can only be machined on boring machines. To ensure smooth and normal operation of the chain, the dimensional accuracy of the two mounting pin holes on the chain links must be high, as must the distance between the two pin holes and the distance from the two pin holes to the chain plate. However, machining these pin holes on a boring machine is inefficient and costly. Summary of the Invention

[0003] One object of the present invention is to provide a drilling jig for machining chain link pin holes, which solves the problems of low efficiency and high cost in machining chain link pin holes in the prior art.

[0004] Another object of the present invention is to provide a method for machining a chain link pin hole.

[0005] One technical solution adopted by the present invention is a drilling jig for processing chain link pin holes, including a drilling jig body, the drilling jig body having a square frame structure, a bottom plate arranged at the bottom of the drilling jig body, two side plates arranged vertically along the length direction of the bottom plate, a top plate arranged corresponding to the top of the side plates, and drill sleeves provided at both ends of the upper surface of the top plate.

[0006] The present invention is also characterized in that:

[0007] The drill sleeve passes through the top plate and extends into the drill template body. A thickening plate is provided at the portion where the drill sleeve extends. A tightening screw hole a is provided in the top plate, and a tightening bolt is sleeved through the tightening screw hole a.

[0008] A pasting plate a is arranged on the bottom plate near one side plate, and a pasting plate b is arranged on the side plate near the pasting plate a.

[0009] A tightening screw hole b is provided on the side plate away from the plate a, and the tightening screw hole b is sleeved with a tightening bolt.

[0010] The position where the top screw hole a is opened is arranged opposite to the mounting plate a, and the position where the top screw hole b is opened is arranged opposite to the mounting plate b.

[0011] The chain link includes a support plate, and two chain plates are vertically arranged along the length direction at the bottom of the support plate. Pin holes are opened at both ends of each chain plate. The distance between the two drill sleeves on the top plate corresponds to the distance between the two pin holes of each chain plate, and the vertical distance from the center of the drill sleeve to the plate b corresponds to the distance from the center of each pin hole to the support plate.

[0012] Another technical solution adopted by the present invention is a method for machining a link pin hole, which is implemented by using the above-mentioned drilling jig for machining a link pin hole in accordance with the following steps:

[0013] Step 1: Place the chain link to be processed into the frame structure of the drilling jig body and clamp it in place;

[0014] Step 2: Clamp the jig body together with the chain link to be processed on the workbench of a common drilling machine;

[0015] Step 3: Use the drill sleeve to guide the drill bit and reamer, and first drill pre-holes on the two pin holes to be processed on the chain link before reaming;

[0016] Step 4: Ream the pin hole.

[0017] The present invention is also characterized in that:

[0018] The specific steps of step 1 are: place the upper surface of the support plate of the chain link tightly against the supporting plate b of the drilling jig body, and one side of the support plate tightly against the supporting plate a; screw the tightening bolts into the tightening screw holes a and b respectively, and fix the processed chain link and the drilling jig body together by tightening the chain link vertically and horizontally against the inside of the drilling jig body. The two pin holes to be processed on each chain plate are just below the two drill sleeves on the drilling jig body.

[0019] Step 3: Install a drill bit for drilling pre-holes on the spindle of an ordinary drilling machine. The drill bit diameter is based on the reaming allowance standard. Start the ordinary drilling machine, move the drilling machine rocker arm to make the drill bit enter the two drill sleeve holes in turn, and use the drill sleeve to guide the pre-holes.

[0020] Step 4: Remove the drill bit from the spindle of the ordinary drilling machine, install the reamer, start the ordinary drilling machine, move the drilling machine rocker arm to make the reamer enter the two drill sleeve holes in turn, and use the guide of the drill sleeve to ream out the pin hole.

[0021] The beneficial effects of the present invention are as follows: the drilling jig for machining chain link pin holes solves the problems of low efficiency and high cost in conventional chain link pin hole machining. It saves equipment, improves efficiency, and features a simple and easy machining method that is easy to operate and does not rely heavily on the skill of the machine operator. It utilizes a common drilling machine to achieve efficient and low-cost machining of chain link pin holes, directly impacting the machining accuracy and pass rate of products, thus meeting the needs of social development. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a structural schematic diagram of a drilling jig for machining chain link pin holes according to the present invention;

[0023] Figure 2 It is a top view of the drilling jig for machining the pin holes of chain links of the present invention;

[0024] Figure 3 It is a left side view of the drilling jig for machining chain link pin holes according to the present invention.

[0025] Figure 4 This is a schematic structural diagram of a chain link to be processed in the present invention;

[0026] Figure 5 It is a side view of a chain link to be processed according to the present invention;

[0027] Figure 6 This is a schematic diagram of assembling a chain link with a drilling jig for machining a chain link pin hole according to the present invention;

[0028] Figure 7 yes Figure 6 A top view of

[0029] Figure 8 yes Figure 6 Left view of .

[0030] In the figure, 1. chain link, 1-1. support plate, 1-2. chain plate, 1-3. pin hole, 2. drilling jig body, 2-1. bottom plate, 2-2. side plate, 2-3. top plate, 2-4. attached plate a, 2-5. attached plate b, 2-6. thickening plate, 2-7. drill sleeve, 2-8. tightening screw hole a, 2-9. tightening screw hole b, 3. tightening bolt. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The present invention is used for the drilling jig structure of chain link pin hole processing, such as Figure 1 As shown, it includes a drill template body 2, which is a square frame structure. A bottom plate 2-1 is set at the bottom of the drill template body 2, two side plates 2-2 are vertically set on the bottom plate 2-1 along the length direction, and a top plate 2-3 is correspondingly set on the top of the side plate 2-2. Drill sleeves 2-7 are opened at both ends of the upper surface of the top plate 2-3.

[0033] like Figure 2 As shown, the drill sleeve 2-7 passes through the top plate 2-3 and extends into the drilling template body 2. The portion where the drill sleeve 2-7 extends is provided with a thickening plate 2-6. The top plate 2-3 is provided with a tightening screw hole a2-8. The tightening screw hole a2-8 is sleeved with a tightening bolt 3. A sticking plate a2-4 is provided on the bottom plate 2-1 near one side plate 2-2. A sticking plate b2-5 is provided on the side plate 2-2 near the sticking plate a2-4. Figure 3As shown, a jacking screw hole b2-9 is provided on the side panel 2-2 away from the attachment plate a2-4, and a jacking bolt 3 is received through the jacking screw hole b2-9. The jacking screw hole a2-8 is provided opposite to the attachment plate a2-4, and the jacking screw hole b2-9 is provided opposite to the attachment plate b2-5. After machining, the attachment plates a2-4 and b2-5 serve as a reference for clamping the workpiece, facilitating machining and reducing the amount of machining.

[0034] The present invention is used for the drilling jig processing of the chain link pin hole. The structure of the chain link 1 is as follows: Figure 4 and Figure 5 As shown, chain link 1 includes a support plate 1-1. Two chain plates 1-2 are vertically mounted along the bottom of support plate 1-1 along its length. Support plate 1-1 and chain plates 1-2 are welded together. Pin holes 1-3 are defined at each end of each chain plate 1-2. To ensure smooth and normal operation of the chain, the diameters of these two pin holes 1-3 must be highly precise. The distance A between the two pin holes 1-3 on each chain plate 1-2 represents the pitch of the transport chain. The distance H from the center of each pin hole 1-3 to support plate 1-1 determines the position of the transport surface of the chain stack conveyor and requires high dimensional accuracy. The distance a between the two drill bushings 2-7 on the top plate 2-3 is machined to match the distance A between the two pin holes 1-3 on each chain plate 1-2. The vertical distance h from the center of each drill bushing 2-7 to the attachment plate b2-5 is machined to match the distance H from the center of each pin hole 1-3 to support plate 1-1.

[0035] The working principle of the drilling jig for machining the chain link pin holes of the present invention is as follows: Figure 6 、 Figure 7 、 Figure 8 As shown, according to the positions of the support plate 1-1 and the two chain plates 1-2 on the chain link 1, two tightening screw holes a2-8 are processed at corresponding positions on the two top plates 2-3, and several tightening screw holes b2-9 are processed at corresponding positions on a side plate 2-2. The tightening screw holes a2-8 cooperate with the pasting plate a2-4 to achieve fixed clamping in the length direction of the support plate 1-1, and the tightening screw holes b2-9 cooperate with the pasting plate b2-5 to achieve fixed clamping of the chain plate 1-2, which is used to fix the object chain link 1.

[0036] After welding the thickened plates 2-6 on the top plate 2-3, the drill holes are processed and the quenched drill sleeves 2-7 are inserted. When drilling and reaming the two pin holes 1-3, the drill bit and reamer are guided. The distance a between the two drill sleeves 2-7 of the drill holes is processed according to the distance A between the two pin holes 1-3, and the distance h from the two drill sleeves 2-7 to the plate b2-5 is processed according to the distance H from the pin hole 1-3 to the chain plate.

[0037] Using the drill jig for machining the link pin holes, the chain link pin hole machining method of the present invention is specifically implemented according to the following steps:

[0038] Step 1: Place the chain link 1 to be processed into the frame structure of the jig body 2 and clamp it in place;

[0039] The specific steps of step 1 are: place the upper surface of the support plate 1-1 of the chain link 1 tightly against the supporting plate b2-5 of the drilling jig body 2, and one side of the support plate 1-1 tightly against the supporting plate a2-4; screw the tightening bolts 3 into the tightening screw holes a2-8 and the tightening screw holes b2-9 respectively, and fix the processed chain link 1 and the drilling jig body 2 together by tightening the chain link 1 vertically and horizontally against the inside of the drilling jig body 2. The two pin holes 1-3 to be processed on each chain plate 1-2 are just below the two drill sleeves 2-7 on the drilling jig body 2.

[0040] Step 2: Clamp the jig body 2 together with the chain link 1 to be processed on the workbench of a common drilling machine;

[0041] Step 3: Use the drill sleeve 2-7 to guide the drill bit and reamer, and first drill pre-holes before reaming on the two pin holes 1-3 to be processed on the chain link 1;

[0042] By installing a drill bit for drilling pre-holes on the spindle of an ordinary drilling machine, the drill bit diameter is adjusted according to the reaming allowance standard, starting the ordinary drilling machine, moving the drilling machine rocker arm to make the drill bit enter the two drill sleeves 2-7 holes in turn, and using the guide of the drill sleeve 2-7 to drill the pre-holes.

[0043] Step 4: Ream pin holes 1-3;

[0044] Remove the drill bit from the spindle of an ordinary drilling machine, install a reamer, start the ordinary drilling machine, move the drilling machine rocker arm to make the reamer enter the two drill sleeves 2-7 holes in turn, and use the guide of the drill sleeve 2-7 to ream out the pin hole 1-3.

[0045] The mold of the present invention is reasonably designed and easy to operate. The hinge link pin hole can be drilled on an ordinary drilling machine, the number of operators is reduced, and the labor cost, equipment cost, energy consumption, etc. are all lower than the multi-process production method; the processing accuracy of the chain link pin hole is high, and a guide is used when drilling and reaming, and the center distance deviation between the produced pin holes 1-3 is small; the guide accuracy requirements of the equipment are low, and general old equipment can meet the production needs. All are completed by the drilling mold body 2. The present invention improves production efficiency and increases the service life of the equipment, and can be widely promoted and applied to all engineering processing chain link pin hole production enterprises.

Claims

1. A method for machining a chain link pin hole, using a drilling jig for machining a chain link pin hole, comprising a drilling jig body (2), the drilling jig body (2) being a square frame structure, a bottom plate (2-1) being provided at the bottom of the drilling jig body (2), two side plates (2-2) being vertically provided on the bottom plate (2-1) along the length direction, a top plate (2-3) being provided correspondingly on the top of the side plates (2-2), and drill sleeves (2-7) being provided at both ends of the upper surface of the top plate (2-3); The drill sleeve (2-7) passes through the top plate (2-3) and extends into the drill template body (2); a thickening plate (2-6) is provided at the portion where the drill sleeve (2-7) extends; a tightening screw hole a (2-8) is provided on the top plate (2-3); and a tightening bolt (3) is sleeved on the tightening screw hole a (2-8); A patch a (2-4) is provided on the bottom plate (2-1) near one side plate (2-2), and a patch b (2-5) is provided on the side plate (2-2) near the patch a (2-4). A tightening screw hole b (2-9) is provided on the side plate (2-2) away from the contact plate a (2-4), and the tightening screw hole b (2-9) is sleeved with a tightening bolt (3); The tightening screw hole a (2-8) is provided at a position opposite to the mounting plate a (2-4), and the tightening screw hole b (2-9) is provided at a position opposite to the mounting plate b (2-5); The chain link (1) comprises a supporting plate (1-1), two chain plates (1-2) are vertically arranged at the bottom of the supporting plate (1-1) along the length direction, pin holes (1-3) are provided at both ends of each chain plate (1-2), the distance between two drill bushings (2-7) on the top plate (2-3) corresponds to the distance between the two pin holes (1-3) of each chain plate (1-2), and the vertical distance from the center of the drill bushing (2-7) to the sticking plate b (2-5) corresponds to the distance from the center of each pin hole (1-3) to the supporting plate (1-1); It is characterized in that Follow these steps to implement it: Step 1: Place the chain link (1) to be processed into the frame structure of the jig body (2) and clamp it in place; place the upper surface of the support plate (1-1) of the chain link (1) in close contact with the attachment plate b (2-5) of the jig body (2), and place one side of the support plate (1-1) in close contact with the attachment plate a (2-4); Step 2: Clamp the drilling jig body (2) together with the chain link (1) to be processed on the workbench of a common drilling machine; Step 3: Using the drill sleeve (2-7) to guide the drill bit and reamer, first drill pre-holes on the two pin holes (1-3) to be processed on the chain link (1); Step 4: Ream the pin holes (1-3).

2. The method for processing a link pin hole according to claim 1, characterized in that: The specific steps of step 1 are as follows: tightening bolts (3) are screwed into tightening screw holes a (2-8) and tightening screw holes b (2-9) respectively, and the processed chain links (1) are fixed to the inside of the drilling jig body (2) by tightening the chain links (1) vertically and horizontally. The two pin holes (1-3) to be processed on each chain plate (1-2) are just below the two drill sleeves (2-7) on the drilling jig body (2).

3. The method for processing a link pin hole according to claim 2, characterized in that: In step 3, a drill bit for drilling pre-holes is installed on the spindle of an ordinary drilling machine. The diameter of the drill bit is in accordance with the reaming allowance standard. The ordinary drilling machine is started, and the drilling machine rocker arm is moved to make the drill bit enter the holes of the two drill sleeves (2-7) in turn, and the pre-holes are drilled out using the guide of the drill sleeves (2-7).

4. The method for processing a link pin hole according to claim 3, characterized in that: In step 4, the drill bit is removed from the spindle of the ordinary drilling machine, a reamer is installed, the ordinary drilling machine is started, and the drilling machine rocker arm is moved so that the reamer enters the holes of the two drill sleeves (2-7) in turn, and the pin hole (1-3) is reamed out using the guide of the drill sleeve (2-7).

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