CN105689839B - One kind is light-duty to fold the two-sided aluminium soldering frock of fin cold drawing and clamping method - Google Patents

Abstract

Light-duty the two-sided aluminium soldering frock of fin cold drawing and clamping method are folded the present invention relates to one kind, frock includes middle plate, upper plate, lower plate, housing screw and clamping screw, the compression of different height heat conduction cushion block is realized by the threaded engagement of clamping screw, the compression for the fin that there is mismachining tolerance in height is realized by the threaded engagement of housing screw.Not only fin can be made effectively to be attached on cold drawing by the threaded pre-tightening power needed for the compression of spring, be also prevented from that torque is excessive to cause fin crimp or cold drawing to be broken.The compression stress of spring is also prevented from each weldment and thread looseness phenomenon occurs in high and low temperature dilation.The upper plate of the frock, lower plate are designed with dowel hole, it is ensured that being accurately positioned when it is assembled with middle plate；The reserved groove of plate and cold drawing positive and negative and the reserved each groove of middle plate ensure being accurately positioned when heat-conducting padding plate, fin and cold drawing soldering on the lower.

Description

One kind is light-duty to fold the two-sided aluminium soldering frock of fin cold drawing and clamping method

Technical field

The invention belongs to Machine Design and technique manufacture field, it is related to and a kind of light-duty fold the two-sided aluminium soldering of fin cold drawing and use Frock.The frock realizes certain light-duty efficient two-sided welding for folding fin cold drawing, possesses piece-holder soon, positioning is accurate Really, conveniently, the advantages of soldering part deformation is small, it is adaptable to the high-volume aluminium soldering production of the cold drawing.

Background technology

Population unit is quite strict to the appearance and size and weight demands of certain portable reconnaissance radar, whole reconnaissance radar body Product is smaller, and the heat consumption of each subsystem is higher in radar, and some subsystems also have the characteristics of local heat density is high, to structure On heat dissipation design bring problem.The radar uses the theory of Integrated design, is dissipated using integrated wall module designs, cold drawing altogether are integrated Heat, the method for distributed power source carry out loss of weight and reducing power consumption is handled, and successfully realize the lightness and high-power heat-dissipation of radar It is required that.

Cold drawing is the core devices that radar radiates, and cold drawing has the requirement of lightweight and high heat-sinking capability.At the signal of radar Multiple powerful DSP and fpga chip in reason printed board, ripple control machine printed board are delivered to cold by flexible chill bar Plate.Because chip height is inconsistent, cold drawing surface, which need to design several sizes, highly different cushion blocks, could realize the table of chip Face attaches radiating.Cold drawing is in addition simultaneously radiating fin, these radiating fins should meet thickness it is as far as possible thin, along cooling stream direction Array fin is tried one's best to wait more and required.

Cold drawing has two kinds of processing technology forming methods.The first is to go out whole thick aluminium sheet Milling Process directly on milling machine Come, include the height cushion block and many array fins along cooling stream direction of part tow sides.Now, it is contemplated that the technique of processing Property, these fins can not be too thin, and thickness can not be less than 1mm；Another is the method by vacuum Aluminum brazing, by a sheet of planar aluminium Plate, radiating fin and various cushion blocks weld together.According to the former, the processing capacity of part is too big, and is needed in process Repeatedly to be heat-treated, especially the radiating fin of 1mm thickness, part process cycle is long；Pass through when using the aluminium foil fin folded When vacuum Aluminum brazing is molded, the aluminium foil fin of lightweight possesses good heat dissipation, lightweight advantage.Aluminium foil is folded into fin had both strengthened The overall rigidity of aluminium foil, increases area of dissipation again.The aluminum foil material thickness only 0.1mm of fin is folded into, compared to milling The 1mm thickness of processing, weight saving is a lot.The fin at the angle of inclination needed for cold drawing welding is completed with linear cutter, is adopted Vacuum Al-brazing Process method is used, itself and heat dissipation cold plate are welded into an overall cold drawing, the overall cooling requirements of radar are met.

Because population unit is very strict to weight demands, so in addition to the installation mating surface of cold drawing, the equal milling of remaining end face Process mitigation groove.The body thickness of cold drawing is 2mm, and the groove depth for mitigating groove is 0.8mm.Mitigating the mitigation end face welding of groove The fin folded, simultaneously welds the heat conduction cushion blocks different from the height that printed board chip is attached in addition.In fin and cold drawing, heat conduction The thick solders of 0.1mm are filled between cushion block and cold drawing respectively.When carrying out vacuum Aluminum brazing, solder melts, by fin and cold drawing, Heat conduction cushion block is together with cold drawing seamless welding.

During high-temperature soldering, two soldering parts need to be compressed with working plate, to ensure solder between the two after thawing Gap can be sufficient filling with.Cold drawing is molded using welding technique.The welding method initially taken is with whole working plate pressure Tightly there is the one side of fin, the heat conduction cushion block in one side is secured it within cold drawing using stainless steel screw in addition, and each cushion block is extremely Two M2 screwed hole is processed less, and the counterbore face of rigging screw is located in the mitigation groove of cold drawing.During first batch of trial-production, find before welding Workload to punching tapping and cold drawing face counterbore on each cushion block is larger, and these stainless steel screws are virtually added The weight of cold drawing.

Due to there is ± 0.5mm working height error on the fin oneself height that folds, it can not be protected during compression tooling plate Demonstrate,proving each fin can closely attach with cold drawing, and welding result is that part fin can not be successfully welded, and percent defective is higher or goes out Now part fin is deformed because decrement is excessive.In order to improve series-produced efficiency, it is necessary to which a kind of special welding tooling, real Now be not required on cold drawing process welding needed for technique counterbore, it is not necessary to mounting process screw by each heat conductive pad it is packaged be fitted on it is cold On plate, and it can ensure that each radiating fin can be reliably attached on cold drawing solder side.

The content of the invention

The technical problem to be solved

In order to avoid the low deficiency of the success rate and efficiency of the welding of prior art, the present invention proposes that one kind is light-duty and folds wing The two-sided aluminium soldering frock of piece cold drawing and clamping method, it is ensured that each fin can be fully pressed into contact with cold drawing, while can protect again The each heat conduction cushion block and cold drawing for demonstrate,proving other one side fully compress attaching, compress the power of fin and should control in rational scope, When should also consider that welding high/low temperature is shunk simultaneously, the influence of the deformation retract of each weldment and frock to welding effect.

Technical scheme

One kind is light-duty to fold the two-sided aluminium soldering frock of fin cold drawing, it is characterised in that including middle plate, upper plate, lower plate, pressure Tight screw and clamping screw；Described middle plate is provided with the groove of size corresponding with the fin of cold drawing upper surface；Described is upper Plate is at the position corresponding with the groove center on middle plate, provided with the screwed hole coordinated with housing screw；In described lower plate Groove provided with size corresponding with the heat-conducting padding plate of cold drawing lower surface, notch end is provided with the screw thread coordinated with clamping screw Hole.

Also include spring, spring housing is on housing screw.

Described housing screw and the contact surface of fin are designed as circular compression end face.

Described clamping screw and housing screw threaded tip both sides cuts into square end face.

Described upper plate, middle plate and lower plate uses 1Cr18Ni9Ti stainless steel materials.

It is a kind of that the clamping method before two-sided aluminium soldering is carried out to cold drawing using described frock, it is characterised in that step is such as Under：

Step 1：By the lower end of cold drawing up, solder and heat-conducting padding plate are sequentially placed into the detent of lower surface；

Step 2：Lower plate is positioned on the lower surface of cold drawing, middle plate is placed on the upper surface of cold drawing, lower plate and middle plate Fixed by lower plate fastening bolt and lower plate shop bolt, the screwed hole that each clamping screw is each passed through in lower plate is simultaneously torqued-up to Each heat-conducting padding plate is compressed, and then each locking nut is tightened on each clamping screw；

Step 3：Upset cold drawing makes its upper surface upward, and solder is sequentially placed into the mitigation groove of upper surface and is folded Fin；

Step 4：Spring is penetrated into housing screw, housing screw is screwed in the corresponding screwed hole of upper plate；

Step 5：Upper plate is positioned on middle plate, and fixed by upper plate fastening bolt and upper plate shop bolt with middle plate, Screw housing screw and compress each fin.

The clamp load torque of the step 2 and step 5 is not more than 5NM.

Beneficial effect

One kind proposed by the present invention is light-duty to fold the two-sided aluminium soldering frock of fin cold drawing and clamping method, high efficiency, big In batches, it is reliably achieved the two-sided soldering of the fin and heat conduction cushion block of light-duty ultra-thin cold drawing.

Brief description of the drawings

Fig. 1 is cold drawing design of part figure and partial enlarged drawing：(a) upward view；(b) front view；(c) top view；(d) it is local Enlarged drawing

Fig. 2 folds the two-sided aluminium soldering frock installation diagram of fin cold drawing for one kind is light-duty

Fig. 3 light-duty fold the two-sided aluminium soldering recruitment of fin cold drawing and loads onto plate to be a kind of

Fig. 4 folds plate in the two-sided aluminium soldering frock of fin cold drawing for one kind is light-duty

Fig. 5 light-duty fold the two-sided aluminium soldering recruitment of fin cold drawing and loads plate to be a kind of

Plate in 1- cold drawings, 2- solders, 3- heat-conducting padding plates, 4- fins, 5-, 6- lower plates, 7- lower plate fastening bolts, 8- lower plates are determined Position pin, 9- clamping screws, 10- locking nuts, 11- springs, 12- upper plates, 13- housing screws, 14- upper plate fastening bolts, 15- Upper plate shop bolt.

Embodiment

In conjunction with embodiment, accompanying drawing, the invention will be further described：

Lower plate is designed in the lower surface of cold drawing, plate in the upper surface design of cold drawing will by shop bolt and mounting screw Three is assembled together.There is the fit-up gap of through hole when being assembled in view of screw, when can overcome assembling by shop bolt Upper plate, lower plate and cold drawing between Tolerance of Degree of position.The material of these frocks should be identical stainless steel material to overcome height Fracture or crackle caused by Material shrinkage is inconsistent after temperature welding, cooling.Lower plate has relative to the Position Design of each heat conduction cushion block Corresponding groove, and the clamping screw that M6-6h is screwed on M6-7H screwed hole, the screwed hole is designed with the middle part of groove.Will The heat conduction cushion block of various different heights is placed in groove, cut in advance above heat conduction cushion block with its sizable solder, Pressured tight screw flight, which is screwed, to be forced tight heat conduction cushion block and cold drawing and attaches, and the effect of locking nut is to prevent clamping screw Loosen.Upper plate is arranged on above middle plate, and it is to produce one to compress each platform for folding fin that it, which is acted on,.Upper plate is relative to each The surface center of fin is similarly designed with screwing M6-6h housing screw on M6-7H screwed hole, screwed hole, compresses Screw bottom is designed with thickness and compresses end face for the circular of 3mm, compresses end face size and is determined by the size of each fin, due to fin Possesses good rigidity after folding in the direction for folding corrugation side, fin need not be covered all by compressing end face.In view of wing ± 0.5mm errors when piece itself is processed in height are, it is necessary to control the pre-fastening moment of housing screw and with the use of compression bullet Spring, another effect of compression spring is that housing screw loosens when preventing welding high-temperature expansion, low-temperature shrink.Upper plate is installed solid Pin positioning completion is needed also exist for when determining to middle plate.

In order to ensure the spacing of fin and heat-conducting padding plate during welding, cold drawing itself need to be recessed in the reserved positioning in the face to be welded Groove, the corresponding depth of groove 0.4mm of heat-conducting padding plate, wherein using 0.1mm for solder, remaining 0.3mm is used for spacing.The chi of groove It is very little to should be slightly bigger than heat-conducting padding plate and fin, during part high-temperature expansion, low-temperature shrink for compensating different materials or different-thickness Inconsistency, it is to avoid produce warpage or fracture.

As shown in Fig. 2 middle plate 5 is the installation foundation of whole frock, lower plate 6 is positioned by lower plate fastening bolt 7 and lower plate Cold drawing 1 is compressed while pin 8 is connected with middle plate, heat-conducting padding plate 3 is placed in the pre-processed groove of cold drawing 1, and is filled Solder 2.Locking nut 10 is used cooperatively with clamping screw 9, and the threaded engagement of clamping screw 9 compresses each heat conductive pad after passing through lower plate 6 Plate 3.The top plate fastening bolt 14 of upper plate 12 and upper plate shop bolt 15 are connected with middle plate 5.Fin 4 passes through each groove on middle plate 5, It is placed in the pre-processed groove of cold drawing 1, and fills solder 2.Spring 11 is located at the circular compression end in the lower end of housing screw 13 Between face and upper plate 12, after the threaded engagement of housing screw 13, each fin 4 is compressed.Adjusted by the threaded engagement of clamping screw 9 To compress the heat conduction cushion block 3 of different height, it is ensured that remaining solder 2, cold drawing 1 are fully contacted.Revolved by the screw thread of housing screw 13 Close adjustment to compress fin 4, it is ensured that the fin 4 that there is height error is fully contacted with solder 2, cold drawing 1.By using spring 11 The torque that housing screw 13 can be controlled to screw, prevents fin 2 and cold drawing 1 to be deformed and break by excessive extruding Split.And in welding, the elasticity of compression spring itself can solve the problems, such as the thread looseness that different materials differences in expansion is caused. Being accurately positioned when realizing that upper plate 12, middle plate 5, the three of lower plate 6 assemble by lower plate shop bolt 8 and upper plate shop bolt 15, When solving welding high and low temperature dilation, the welding problem of misalignment that Screw assembly via clearance is caused；It is positive and negative by cold drawing 1 The reserved each groove of face and lower plate 6 and the reserved each groove of middle plate 5 realize being accurately positioned for each heat-conducting padding plate 3 and each fin 4.

Before welding, according to the positive each groove size of cold drawing 1, solder 2 is first cut, and the solder 2 cut is put into each recessed Groove, is then equally put into each groove by each heat-conducting padding plate 3, is pressed in the top of solder 2.By cold drawing 1 be clamped in middle plate 5 and lower plate 6 it Between.Middle plate 5 is the installation base plate of whole frock, and common each 16 M6-7H screwed holes, when being assembled with lower plate 6, use wherein 8 thereon Individual screw, is connected by lower plate fastening bolt 7 and lower plate shop bolt 8 with lower plate 6.Each clamping screw 9 is each passed through lower plate 6 Upper each M6-7H screwed holes are simultaneously torqued-up to it and compress each heat-conducting padding plate 3 completely, excessive clamp load torque can by the crimp of cold drawing 1, Clamp load torque not should be greater than 5NM.For ease of screwing, the threaded tip both sides of clamping screw 9 cut into square end face.Then by each locking Nut 10 is tightened on each clamping screw 9.Whole frock is turned over and puts the mitigation groove for making middle plate 5 upward, is welded according on cold drawing 1 Each mitigation groove size in fin face cuts solder 2, and puts it into each mitigation groove.By the fin 4 folded according to each correspondence Relation is put on cold drawing 1 each mitigation groove and is pressed on the top of solder 2.Spring 11 be filled in upper plate 12 and housing screw 13 it Between, spring is pressurized after threaded engagement.The top plate fastening bolt 14 of upper plate 12 and upper plate shop bolt 15 are connected with middle plate 5.Entirely After the completion of welding body assembling, housing screw 13 is screwed with torque spanner and compresses each fin 4, clamp load torque is not more than 5NM.For convenience Operation, the threaded tip both sides of housing screw 13 cut into square end face.The bottom of housing screw 13 contacts end face with each fin 4 and is designed with Circular compression end face of different sizes.By the threaded engagement of housing screw 13, the working height error of fin 4 can be overcome, Ensure that fin 4 is attached on cold drawing 1 completely after compressing solder 2.By the threaded engagement of clamping screw 9, each heat conduction can be overcome It is inconsistent in the height of cushion block 3, and make it compress completely after solder 2 to be attached to completely on cold drawing 1.

To ensure the uniformity of Material shrinkage during welding, frock material is 1Cr18Ni9Ti stainless steel materials.In vacuum When being welded in stove, whole frock try one's best horizontal positioned with weldment with prevent solder dissolve after trickling under gravity cause Welding is uneven.The design difficulty of the welding tooling is being accurately positioned between each weldment, upper plate 12, middle plate 5, lower plate 6 Between positioning plate shop bolt 8 and upper plate shop bolt 15 are realized on the lower.Positioning between cold drawing, each heat-conducting padding plate and fin Plate 6 is reserved with having been reserved and each fin size on each each groove of heat-conducting padding plate size identical and middle plate 5 on the lower Each groove of identical is realized.Above-mentioned frock is successfully realized the light-duty two-sided soldering for folding fin and heat-conducting padding plate, frock weldering It is connected into power high, and welding efficiency is high, and frock is reusable, has been successfully applied in the batch production of certain product.

Claims (3)

1. Light-duty fold the two-sided aluminium soldering frock of fin cold drawing 1. a kind of, it is characterised in that including middle plate (5), upper plate (12), under Plate (6), housing screw (13) and clamping screw (9)；Described middle plate (5) is provided with fin (4) phase with cold drawing (1) upper surface The groove of correspondence size；Described upper plate (12) is provided with and compression at the position corresponding with the groove center on middle plate (5) The screwed hole that screw (13) coordinates；Described lower plate (6) is provided with corresponding with the heat-conducting padding plate (3) of cold drawing (1) lower surface big Small groove, notch end is provided with the screwed hole coordinated with clamping screw (9)；Also include spring (11), spring (11) is enclosed on pressure On tight screw (13)；The contact surface of housing screw (13) and fin (4) is designed as circular compression end face；Described clamping screw And housing screw (13) threaded tip both sides cut into square end face (9)；Described upper plate (12), middle plate (5) and lower plate (6) is used 1Cr18Ni9Ti stainless steel materials.
2. 2. the frock described in a kind of usage right requirement 1 carries out the clamping method before two-sided aluminium soldering to cold drawing, it is characterised in that Step is as follows：

   Step 1：By the lower end of cold drawing (1) up, solder and heat-conducting padding plate are sequentially placed into the detent of lower surface (3)；

   Step 2：Lower plate (6) is positioned on the lower surface of cold drawing (1), middle plate (5) is placed on the upper surface of cold drawing (1), under Plate (6) is fixed by lower plate fastening bolt (7) and lower plate shop bolt (8) with middle plate (5), and each clamping screw (9) is worn respectively The screwed hole crossed in lower plate (6) is simultaneously torqued-up to each heat-conducting padding plate (3) compression, and each locking nut (10) then is tightened on into each compression On screw rod (9)；

   Step 3：Upset cold drawing (1) makes its upper surface upward, and solder is sequentially placed into the mitigation groove of upper surface and is folded Fin (4)；

   Step 4：Spring (11) is penetrated into housing screw (13), housing screw (13) is screwed in the corresponding screw thread of upper plate (12) In hole；

   Step 5：Upper plate (12) is positioned on middle plate (5), and passes through upper plate fastening bolt (14) and upper plate shop bolt (15) It is fixed with middle plate (5), screw housing screw (13) and compress each fin (4).
3. 3. clamping method according to claim 2, it is characterised in that the clamp load torque of the step 2 and step 5 is not more than 5Nm。