Novel radiator cold riveting tool for automobile lamp and processing technology thereof

Abstract

The present application relates to a kind of new radiator cold riveting tool of automobile light and its processing technology, the cold riveting tool includes cold riveting tool upper die and cold riveting tool lower die, cold riveting tool upper die includes upper die positioning plate, upper die clamping plate, guide column plate, needle bottom plate, equal height bolt, needle, spring one, needle fixed plate, linear bearing one, guide column, limit sleeve, floating press plate and guide column, cold riveting tool lower die includes bottom die, linear bearing two, floating plate, equal height column, rivet, rivet fixed block, handle, spring two, lower die guide column, quick-change knob, lower die bottom plate and die closing positioning sleeve;Radiator is divided into two parts of base plate and fin, base plate and fin are all made of aluminum plate stamping, then base plate and fin are riveted together by cold riveting tool to form new radiator;The present application can rivet base plate and fin together to form new radiator, and the consistency of base plate and fin after stamping is much higher than that of casting part, greatly improves the versatility, and cost is lower.

Description

Technical Field

[0001] This invention relates to the field of automotive lamp radiator technology, specifically to a novel cold riveting fixture for automotive lamp radiators and its processing technology. Background Technology

[0002] Currently, most automotive headlight radiators are made of cast aluminum. These castings have the following drawbacks: First, they are prone to defects such as sand holes and air holes. Second, after each batch of parts is produced, workers need to re-sand-shape and re-form the parts. Third, the radiator products produced by this casting process have a low pass rate and are time-consuming and labor-intensive. This is not a way for companies to reduce costs or develop.

[0003] Therefore, there is an urgent need to provide a tooling and manufacturing process suitable for new automotive headlight radiators to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a new type of cold riveting fixture for automotive headlight radiators. By dividing the radiator into two parts, a base plate and fins, the cold riveting fixture can rivet the base plate and fins together to form a new type of radiator. Moreover, the consistency of the base plate and fins after stamping is much higher than that of the casting, which greatly improves the versatility and reduces the cost.

[0005] To achieve the above objectives, a novel cold riveting fixture for automotive headlight radiators is designed, comprising an upper cold riveting mold 3 and a lower cold riveting mold 4, wherein... The upper mold 3 of the cold riveting fixture includes an upper mold positioning plate 3.1, an upper mold clamping plate 3.2, a guide post plate 3.3, an ejector pin base plate 3.4, an equalizing bolt 3.5, an ejector pin 3.6, an ejector pin fixing plate 3.8, a limiting sleeve 3.11, a floating pressure plate 3.12, and guide posts 3.13. The upper mold positioning plate 3.1, upper mold clamping plate 3.2, guide post plate 3.3, and ejector pin base plate 3.4 are sequentially fixedly connected from top to bottom. Guide posts 3.13 are provided on both the left and right sides below the guide post plate 3.3, and the guide posts 3.13 are mounted on the guide post plate 3.3. The limiting sleeve 3.11 passes through the guide post 3.13 and abuts against the bottom of the guide post plate 3.3. The limiting sleeve 3.11 and the guide post 3.13 are locked together. The ejector pin base plate 3.4 is provided with an ejector pin fixing plate 3.8 below it. The ejector pin 3.6 is placed in the ejector pin groove of the ejector pin fixing plate 3.8. The ejector pin fixing plate 3.8 is provided with a floating pressure plate 3.12 below it. The floating pressure plate 3.12 is provided with an ejector pin hole corresponding to the ejector pin 3.6. The equal height bolt 3.5 passes through the ejector pin fixing plate 3.8 and is locked together with the floating pressure plate 3.12. The cold riveting fixture lower mold 4 includes a bottom mold 4.1, a second linear bearing 4.2, a floating plate 4.3, a leveling column 4.4, a second spring 4.8, a lower mold guide post 4.9, a lower mold base plate 4.11, and a mold closing positioning sleeve 4.12. The bottom mold 4.1 is fixedly installed on the floating plate 4.3. The bottom mold 4.1 is provided with a fin mounting groove for inserting the fins 2. The top of the leveling column 4.4 passes through the floating plate 4.3, and the bottom of the leveling column 4.4 is locked to the lower mold base plate 4.11. The second spring 4.9... .8 is sleeved around the equal-height column 4.4. One end of the second spring 4.8 supports the bottom surface of the floating plate 4.3, and the other end of the second spring 4.8 supports the top surface of the lower mold base plate 4.11. Linear bearings 4.2 are installed at the four corners of the floating plate 4.3. The lower mold base plate 4.11 is fixedly connected to the lower mold guide post 4.9 and the mold closing positioning sleeve 4.12. The top of the lower mold guide post 4.9 is connected to the linear bearing 4.2. The mold closing positioning sleeve 4.12 is connected to the guide post 3.13 of the upper mold 3 of the cold riveting fixture.

[0006] Furthermore, the upper mold positioning plate 3.1 and the upper mold clamping plate 3.2 are locked together by pin hole positioning screws, the guide post plate 3.3 and the upper mold clamping plate 3.2 are locked together by pin hole positioning screws, and the ejector pin base plate 3.4 and the guide post plate 3.3 are locked together by pin hole positioning screws.

[0007] Furthermore, the four corners of the ejector pin fixing plate 3.8 are tightly fitted with four linear bearings 3.9, and the tops of the four guide posts 3.10 pass through the linear bearings 3.9, thereby ensuring that the floating pressure plate 3.12 does not warp when pressing the base plate 1, and the bottoms of the four guide posts 3.10 are locked to the floating pressure plate 3.12.

[0008] Furthermore, the floating pressure plate 3.12 is provided with a spring groove, and a spring 3.7 is installed in the spring groove. The spring 3.7 passes through the ejector pin fixing plate 3.8, and the other end of the spring 3.7 presses against the ejector pin base plate 3.4, so that the ejector pin 3.6 does not protrude from the floating pressure plate 3.12 in a free state.

[0009] Furthermore, handles 4.7 are symmetrically installed on the left and right sides of the top surface of the lower mold base plate 4.11, and a quick-change knob 4.10 is provided on the top surface of the lower mold base plate 4.11 along the oblique angle direction. Both the handles 4.7 and the quick-change knob 4.10 are locked to the lower mold base plate 4.11 by screws.

[0010] Furthermore, a rivet fixing block 4.6 is fixed in the middle of the lower mold base plate 4.11, and a rivet 4.5 is fixed on the rivet fixing block 4.6. The rivet 4.5 has protrusions on both sides, and the rivet 4.5 passes through the rivet fixing block 4.6. The rivet fixing block 4.6 locks and fixes the rivet 4.5 on the lower mold base plate 4.11 by pressing the protrusions of the rivet 4.5.

[0011] This invention also provides a novel cold riveting process for automotive headlight radiators, comprising the following steps: 1) The substrate 1 is stamped to form rivet 1.1, and the fin 2 is stamped to form rivet hole 2.1; 2) Place the fin 2 into the bottom mold 4.1 of the cold riveting fixture lower mold 4 of the new type of automotive headlight radiator cold riveting fixture as described above, and place the rivet 1.1 of the substrate 1 into the bottom mold 4.1 after aligning it with the rivet hole 2.1 of the fin 2. 3) Assemble the upper mold 3 and the lower mold 4 of the cold riveting fixture together, and use the guide post 3.13 and the mold closing positioning sleeve 4.12 to make the ejector pin 3.6 insert into the riveting pit 1.2 of the base plate 1; 4) Place the entire cold riveting fixture into a punch press, a pneumatic-hydraulic press, or a cylinder. The ejector pin 3.6 presses against the riveting pit 1.2 of the substrate 1, so that the material of the riveting pin 1.1 can only be spread out to both sides during cold riveting. The fins 2 are riveted together with the substrate 1 to form a new type of heat sink.

[0012] Furthermore, the rivet diameter ØD and rivet height H on the substrate 1, and the rivet hole diameter ØE and rivet hole thickness F of the fin 2, satisfy the following dimensional values: rivet hole diameter ØE = rivet diameter ØD + 0.2mm, rivet height H = rivet hole thickness F + 0.8mm.

[0013] Furthermore, both the substrate 1 and the fins 2 are made of aluminum sheet by stamping.

[0014] Compared with the prior art, the present invention has the following advantages: (1) The present invention divides the heat sink into two parts: a base plate and fins. Both the base plate and fins are made of aluminum plate by stamping. Then the base plate and fins are riveted together by cold riveting to form a new type of heat sink. (2) Compared with traditional castings, the present invention does not require sand casting and molding, and then a casting machine is needed to produce finished products; (3) The cold riveting fixture of the present invention can complete the riveting action in a cylinder, a pneumatic-hydraulic booster or a punch press, which greatly improves the versatility. The consistency of the substrate and fins after stamping is far higher than that of the castings. (4) The process of this invention is simple, the yield rate is high, and the cost is lower. It replaces the traditional cast radiator and directly saves the company costs. It is worth promoting and applying. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the cold riveting fixture of the present invention; Figure 2 This is a three-dimensional structural diagram of the upper mold of the cold riveting fixture of the present invention; Figure 3 This is an exploded view of the upper mold of the cold riveting fixture of the present invention; Figure 4 This is a three-dimensional structural diagram of the lower mold of the cold riveting tooling of the present invention; Figure 5 This is an exploded view of the lower mold of the cold riveting fixture of the present invention; Figure 6 This is a schematic cross-sectional view of the substrate molding process of the present invention; Figure 7 This is a schematic diagram of the fin forming process of the present invention; Figure 8 This is a schematic cross-sectional view of the substrate and fins after riveting. Figure 9 This is a three-dimensional structural diagram of the radiator produced by the casting process of this invention; Figure 10 This is an exploded view of the heat sink using the cold riveting process of this invention; Figure 11 This is a finished product image of the heat sink using the cold riveting process of this invention.

[0016] In the diagram: 1. Base plate; 2. Fin; 3. Upper mold of cold riveting fixture; 4. Lower mold of cold riveting fixture; 1.1. Rivet post; 1.2. Rivet post recess; 2.1. Rivet hole; 3.1. Upper mold positioning plate; 3.2. Upper mold clamping plate; 3.3. Guide post plate; 3.4. Ejector pin base plate; 3.5. Equal height bolt; 3.6. Ejector pin; 3.7. Spring 1; 3.8. Ejector pin fixing plate; 3.9. Linear bearing 1; 3.10 3.11 Guide pillar; 3.12 Limit sleeve; 3.13 Floating pressure plate; 4.1 Guide pillar; 4.1 Bottom mold; 4.2 Linear bearing II; 4.3 Floating plate; 4.4 Equal height pillar; 4.5 Rivet knife; 4.6 Rivet knife fixing block; 4.7 Handle; 4.8 Spring II; 4.9 Lower mold guide pillar; 4.10 Quick change knob; 4.11 Lower mold base plate; 4.12 Mold closing positioning sleeve. Detailed Implementation

[0017] As attached Figure 1 To be continued Figure 11 As shown, this invention provides a novel cold riveting fixture for automotive headlight radiators, comprising a substrate 1, fins 2, an upper cold riveting die 3, and a lower cold riveting die 4; wherein: The upper mold 3 of the cold riveting fixture includes an upper mold positioning plate 3.1, an upper mold clamping plate 3.2, a guide post plate 3.3, an ejector pin base plate 3.4, an equalizing bolt 3.5, an ejector pin 3.6, a spring 3.7, an ejector pin fixing plate 3.8, a linear bearing 3.9, a guide post 3.10, a limit sleeve 3.11, a floating pressure plate 3.12, and a guide post 3.13. The upper mold positioning plate 3.1, upper mold clamping plate 3.2, guide post plate 3.3, and ejector pin base plate 3.4 are fixedly connected from top to bottom. Guide posts 3.13 are provided on both the left and right sides below the column plate 3.3. The guide posts 3.13 are inserted into the guide post plate 3.3. The limiting sleeve 3.11 passes through the guide post 3.13 and presses against the bottom of the guide post plate 3.3. The limiting sleeve 3.11 and the guide post 3.13 are locked together. A ejector pin fixing plate 3.8 is provided below the ejector pin base plate 3.4. The ejector pin 3.6 is placed in the ejector pin groove of the ejector pin fixing plate 3.8. A floating pressure plate 3.12 is provided below the ejector pin fixing plate 3.8. The ejector pin 3.6 has an ejector pin hole corresponding to the ejector pin 3.6. An equal-height bolt 3.5 passes through the ejector pin fixing plate 3.8 and is locked together with the floating pressure plate 3.12. The upper mold positioning plate 3.1 is locked to the upper mold clamping plate 3.2 by pin-hole positioning screws; the guide pillar plate 3.3 is locked to the upper mold clamping plate 3.2 by pin-hole positioning screws; the ejector pin base plate 3.4 is locked to the guide pillar plate 3.3 by pin-hole positioning screws. The ejector pin fixing plate 3.8 has four linear bearings 3.9 and four guide pillars 3.9 tightly fitted at its four corners. The top of the .10 passes through the linear bearing 3.9, thus ensuring that the floating pressure plate 3.12 does not warp when pressing the base plate 1. The bottom of the four guide pillars 3.10 is locked to the floating pressure plate 3.12. The floating pressure plate 3.12 is provided with a spring groove, in which a spring 3.7 is installed. The spring 3.7 passes through the ejector pin fixing plate 3.8, and the other end of the spring 3.7 presses against the ejector pin base plate 3.4, so that the ejector pin 3.6 does not protrude from the floating pressure plate 3.12 in a free state.

[0018] The cold riveting fixture lower mold 4 includes a bottom mold 4.1, a second linear bearing 4.2, a floating plate 4.3, a leveling column 4.4, a riveting knife 4.5, a riveting knife fixing block 4.6, a handle 4.7, a second spring 4.8, a lower mold guide post 4.9, a quick-change knob 4.10, a lower mold base plate 4.11, and a mold closing positioning sleeve 4.12. The bottom mold 4.1 is fixedly installed on the floating plate 4.3. The bottom mold 4.1 is provided with a fin mounting groove for inserting the fins 2. The top of the leveling column 4.4 is inserted into the floating plate 4.3, and the bottom of the leveling column 4.4 is locked to the lower mold base plate 4.11. The second spring 4.8 is sleeved around the leveling column 4.4. One end of the second spring 4.8 supports the bottom surface of the floating plate 4.3, and the other end of the second spring 4.8 supports the top surface of the lower mold base plate 4.11. Linear shafts are installed at the four corners of the floating plate 4.3. 4.2 is a bearing 2. A lower mold guide post 4.9 and a mold closing positioning sleeve 4.12 are fixedly connected to the lower mold base plate 4.11. The top of the lower mold guide post 4.9 is connected to the linear bearing 2.2. The mold closing positioning sleeve 4.12 is connected to the guide post 3.13 of the upper mold 3 of the cold riveting fixture. Handles 4.7 are symmetrically installed on the left and right sides of the top surface of the lower mold base plate 4.11. A quick-change knob 4.10 is provided on the top surface of the lower mold base plate 4.11 along the oblique angle direction. Both handles 4.7 and quick-change knob 4.10 are locked to the lower mold base plate 4.11 with screws. A rivet fixing block 4.6 is fixed in the middle of the lower mold base plate 4.11. A rivet 4.5 is fixed on the rivet fixing block 4.6. The rivet 4.5 passes through the rivet fixing block 4.6 and is then fixed to the lower mold base plate 4.11 by the rivet fixing block 4.6.

[0019] This invention also provides a novel cold riveting process for automotive headlight radiators, comprising the following steps: 1) The substrate 1 is stamped to form rivet 1.1, and the fin 2 is stamped to form rivet hole 2.1; 2) Place the fin 2 into the bottom mold 4.1 of the cold riveting fixture lower mold 4 of the new type of automotive headlight radiator cold riveting fixture as described above, and place the rivet 1.1 of the substrate 1 into the bottom mold 4.1 after aligning it with the rivet hole 2.1 of the fin 2. 3) Assemble the upper mold 3 and the lower mold 4 of the cold riveting fixture together, and use the guide post 3.13 and the mold closing positioning sleeve 4.12 to make the ejector pin 3.6 insert into the riveting pit 1.2 of the base plate 1; 4) Place the entire cold riveting fixture into a punch press, a pneumatic-hydraulic press, or a cylinder. The ejector pin 3.6 presses against the riveting pit 1.2 of the substrate 1, so that the material of the riveting pin 1.1 can only be spread out to both sides during cold riveting. The fins 2 are riveted together with the substrate 1 to form a new type of heat sink.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: A novel cold riveting fixture for automotive headlight radiators includes an upper mold positioning block 3.1 locked to the upper mold clamping plate 3.2 via pin-hole positioning screws; a guide post 3.13 passing through a guide post plate 3.3, which is also locked to the upper mold clamping plate 3.2 via pin-hole positioning screws; an ejector pin base plate 3.4 locked to the guide post plate 3.3 via pin-hole positioning screws; an ejector pin 3.6 inserted into the ejector pin groove of an ejector pin fixing plate 3.8, with an equalizing bolt 3.4 passing through the ejector pin fixing plate 3.8 and locking it to a floating pressure plate 3.12; four linear bearings 3.9 tightly fitted to the ejector pin fixing plate 3.8; and four guide pins... The guide post 3.10 is locked to the floating pressure plate 3.12; two springs 3.7 are installed in the spring grooves of the floating pressure plate 3.12, with one end pressing against the ejector pin base plate 3.4, so that the ejector pin 3.6 does not protrude from the floating pressure plate 3.12 in a free state. Four guide posts 3.10 pass through the linear bearing 3.9 to ensure that the floating pressure plate 3.12 does not warp or become uneven when pressing the base plate 1; the limiting sleeve 3.11 passes through the guide post 3.13 and presses against the bottom of the guide post plate 3.3, and then the limiting sleeve 3.11 is locked to the guide post 3.13 with screws.

[0021] Linear bearing 4.2 is locked to floating plate 4.3 with screws; bottom mold 4.1 is locked to floating plate 4.3 with positioning screws through pin holes; leveling post 4.4 passes through floating plate 4.3 and is locked to lower mold base plate 4.11; spring 4.8 passes through leveling post 4.4, supporting one end of floating plate 4.3 and the other end of lower mold base plate 4.11; handle 4.7, lower mold guide post 4.9, quick-change knob 4.10, mold closing positioning sleeve 4.12 and lower mold base plate 4.11 are all locked to lower mold base plate 4.11 with screws; rivet 4.5 passes through rivet fixing block 4.6 and is then fixed to lower mold base plate 4.11 by rivet fixing block 4.6; specifically, rivet 4.5 is designed with bosses on both sides, and rivet fixing block 4.6 locks to lower mold base plate 4.11 by pressing the bosses of rivet 4.5. During operation, under the action of the press, the upper die of the cold riveting fixture moves downward, so the floating pressure plate 3.12 presses the substrate 1 tightly; spring 2 4.8 pushes against the supporting floating plate 4.3, thus making the fin 2 close to the substrate 1; the press continues to press down, and the substrate 1 moves down to contact the riveting knife 4.5. Under the pressure, the rivet post on the substrate 1 deforms because at this time the ejector pin 3.6 has already pressed against the post pit on the back of the rivet post on the substrate 1 (see...). Figure 8 Therefore, the rivet can only deform in all directions to rivet the fin 2 to the substrate 1.

[0022] During production, substrate 1 is stamped to process the rivet (e.g., Figure 6 ), the fin 2 is punched to create the rivet holes (e.g. Figure 7 Then, the fins 2 are firmly riveted to the substrate 1 using a riveting fixture (e.g. Figure 8To ensure a secure connection between the fin 2 and the substrate 1, the dimensions of the rivet diameter ØD and rivet height H on the substrate, and the dimensions of the rivet hole diameter ØE and rivet hole thickness F on the fin 2, must be within reasonable ranges. Specifically, the rivet hole diameter ØE of the fin is equal to the rivet diameter ØD + 0.2 mm, and the rivet height H of the substrate is equal to the rivet hole thickness F + 0.8 mm. Both the substrate 1 and the fin 2 are made of aluminum sheet by stamping.

[0023] Place the fin 2 into the bottom mold 4.1 of the lower mold 4 of the cold riveting fixture; align the rivet of the substrate 1 with the rivet hole of the fin 2 and place it into the bottom mold 4.1; assemble the upper mold 3 of the cold riveting fixture with the lower mold 4, wherein the guide post 3.13 and the mold closing positioning sleeve 4.12 ensure that the ejector pin 3.6 is inserted into the rivet hole of the substrate 1; place the entire cold riveting fixture into equipment including but not limited to a punch press, a pneumatic-hydraulic booster, etc., to rivet the fin 2 and the substrate 1 together; the ejector pin 3.6 presses against the rivet hole of the substrate 1, so that the material of the rivet can only spread to both sides during cold riveting (e.g., Figure 8 ).

[0024] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The standard parts used can be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0025] This invention is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this invention shall be considered equivalent substitutions and shall be included within the scope of protection of this invention.

Claims

1. A novel cold riveting fixture for automotive headlight radiators, characterized in that: Including the upper mold (3) and the lower mold (4) of the cold riveting fixture, wherein, The cold riveting fixture upper mold (3) includes an upper mold positioning plate (3.1), an upper mold clamping plate (3.2), a guide post plate (3.3), an ejector pin base plate (3.4), an equal-height bolt (3.5), an ejector pin (3.6), an ejector pin fixing plate (3.8), a limiting sleeve (3.11), a floating pressure plate (3.12), and a guide post (3.13). The upper mold positioning plate (3.1), upper mold clamping plate (3.2), guide post plate (3.3), and ejector pin base plate (3.4) are fixedly connected from top to bottom. Guide posts (3.13) are provided on both the left and right sides below the guide post plate (3.3), and the guide posts (3.13) are inserted into the guide post plate (3.3). Above, the limiting sleeve (3.11) passes through the guide post (3.13) and presses against the bottom of the guide post plate (3.3). The limiting sleeve (3.11) and the guide post (3.13) are locked together. The bottom plate (3.4) of the ejector pin is provided with an ejector pin fixing plate (3.8). The ejector pin (3.6) is placed in the ejector pin groove of the ejector pin fixing plate (3.8). The bottom plate (3.8) of the ejector pin is provided with a floating pressure plate (3.12). The floating pressure plate (3.12) is provided with an ejector pin hole corresponding to the ejector pin (3.6). The equal height bolt (3.5) passes through the ejector pin fixing plate (3.8) and is locked together with the floating pressure plate (3.12). The cold riveting fixture lower mold (4) includes a bottom mold (4.1), a second linear bearing (4.2), a floating plate (4.3), a contour column (4.4), a second spring (4.8), a lower mold guide post (4.9), a lower mold base plate (4.11), and a mold closing positioning sleeve (4.12). The bottom mold (4.1) is fixedly installed on the floating plate (4.3). The bottom mold (4.1) is provided with a fin mounting groove for inserting fins (2). The top of the contour column (4.4) is inserted into the floating plate (4.3), and the bottom of the contour column (4.4) is locked to the lower mold base plate (4.11). The second spring... (4.8) is sleeved around the equal height column (4.4). One end of the second spring (4.8) supports the bottom surface of the floating plate (4.3), and the other end of the second spring (4.8) supports the top surface of the lower mold base plate (4.11). The four corners of the floating plate (4.3) are equipped with linear bearings (4.2). The lower mold base plate (4.11) is fixedly connected with the lower mold guide post (4.9) and the mold closing positioning sleeve (4.12). The top of the lower mold guide post (4.9) is connected to the linear bearing (4.2). The mold closing positioning sleeve (4.12) is connected to the guide post (3.13) of the upper mold (3) of the cold riveting fixture.

2. The novel cold riveting fixture for automotive headlight radiators as described in claim 1, characterized in that: The upper mold positioning plate (3.1) and the upper mold clamping plate (3.2) are locked together by pin hole positioning screws, the guide post plate (3.3) and the upper mold clamping plate (3.2) are locked together by pin hole positioning screws, and the ejector pin base plate (3.4) and the guide post plate (3.3) are locked together by pin hole positioning screws.

3. The novel cold riveting fixture for automotive headlight radiators as described in claim 1, characterized in that: The four corners of the ejector pin fixing plate (3.8) are tightly fitted with four linear bearings (3.9), and the tops of the four guide posts (3.10) pass through the linear bearings (3.9), thereby ensuring that the floating pressure plate (3.12) does not warp when pressing the plate 1. The bottoms of the four guide posts (3.10) are locked to the floating pressure plate (3.12).

4. The novel cold riveting fixture for automotive headlight radiators as described in claim 1, characterized in that: The floating pressure plate (3.12) is provided with a spring groove, and a spring (3.7) is installed in the spring groove. The spring (3.7) passes through the ejector pin fixing plate (3.8), and the other end of the spring (3.7) presses against the ejector pin base plate (3.4), so that the ejector pin (3.6) does not protrude out of the floating pressure plate (3.12) in a free state.

5. The novel cold riveting fixture for automotive headlight radiators as described in claim 1, characterized in that: Handles (4.7) are symmetrically installed on the left and right sides of the top surface of the lower mold base plate (4.11). A quick-change knob (4.10) is provided on the top surface of the lower mold base plate (4.11) along the oblique angle direction. Both the handles (4.7) and the quick-change knob (4.10) are locked to the lower mold base plate (4.11) with screws.

6. The novel cold riveting fixture for automotive headlight radiators as described in claim 1, characterized in that: A rivet fixing block (4.6) is fixed in the middle of the lower mold base plate (4.11). A rivet (4.5) is fixed on the rivet fixing block (4.6). The rivet (4.5) has protrusions on both sides. The rivet (4.5) passes through the rivet fixing block (4.6). The rivet fixing block (4.6) locks the rivet (4.5) on the lower mold base plate (4.11) by pressing the protrusions of the rivet (4.5).

7. A novel cold riveting process for automotive headlight radiators, characterized in that, Includes the following steps: 1) The substrate (1) is stamped to form rivet (1.1), and the fin (2) is stamped to form rivet (2.1). 2) Place the fin (2) into the bottom mold (4) of the cold riveting fixture of the novel automotive headlight radiator as described in any one of claims 1 to 6, and place the rivet (1.1) of the substrate (1) into the bottom mold (4) after aligning it with the rivet hole (2.1) of the fin (2); 3) The upper mold (3) of the cold riveting fixture and the lower mold (4) of the cold riveting fixture are assembled together, and the ejector pin (3.6) is inserted into the riveting pit (1.2) of the base plate (1) through the guide post (3.13) and the mold closing positioning sleeve (4.12). 4) Place the entire cold riveting fixture into a punch press, a pneumatic-hydraulic booster, or a cylinder. The ejector pin (3.6) presses against the riveting pit (1.2) of the substrate (1), so that the material of the riveting pin (1.1) can only be spread out to both sides during cold riveting. The fins (2) are riveted together with the substrate (1) to form a new type of heat sink.

8. The cold riveting process for the novel automotive headlight radiator as described in claim 7, characterized in that: The rivet diameter ØD and rivet height H on the substrate (1), and the rivet hole diameter ØE and rivet hole thickness F of the fin (2) satisfy the following dimensional values: rivet hole diameter ØE = rivet diameter ØD + 0.2mm, rivet height H = rivet hole thickness F + 0.8mm.

9. The cold riveting process for the novel automotive headlight radiator as described in claim 7, characterized in that: Both the substrate (1) and the fins (2) are made of aluminum sheet by stamping.

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