Pressure holding fixture

Abstract

A pressure-maintaining fixture comprises a base, a placement block and a pressure-maintaining assembly, wherein the pressure-maintaining assembly comprises a cover plate, a pressure-maintaining block, a spring, an upper movable block and an adjusting handle, wherein the pressure-maintaining block is aligned with the placement block up and down, the spring is compressed between the pressure-maintaining block and the upper movable block, the cover plate is located above the upper movable block, the cover plate is provided with an adjusting hole penetrating up and down, the inner side wall of the adjusting hole is provided with an internal thread, the adjusting handle comprises a screw rod penetrating the adjusting hole, the screw rod is provided with an external thread meshing with the internal thread, when the adjusting handle is rotated, the upper movable block moves up and down following the screw rod, the pressure-maintaining fixture of the present invention has convenient pressure-maintaining parameters adjustment and a simple working principle.

Description

Technical Field

[0001] The invention relates to mechanical production equipment, in particular to a pressure-maintaining jig. Background Art

[0002] In the production process of electronic products, pressure holding is often required after the components are bonded to ensure the reliability of the bonding. The traditional pressure holding process often uses two forms: manual and machine pressure holding, but there are some problems:

[0003] Manual pressure holding uses a pressure pen with a soft pressure head to directly press the product. This method cannot control the size of the pressure holding force and depends entirely on the employee's operating feel.

[0004] Manual pressure-holding jigs mainly rely on the pressure-holding form of a combination of springs and weights. It is difficult to control the size of the pressure in spring pressure-holding. In the weight pressure-holding jig, although the pressure can be adjusted by increasing or decreasing the mass of the weights, the descending process of the weights during pressure-holding often carries a certain impact force, which causes a certain impact force when the pressure head is pressed down to the product surface, interfering with the pressure-holding parameters.

[0005] Pressure-holding equipment usually uses a cylinder to press down to provide pressure holding, but it is difficult to adjust the pressure-holding parameters of the equipment, and its versatility is poor, so it cannot be used in products with other pressure-holding parameters. Some pressure-holding equipment adds weights and springs to the pressure head mechanism to provide actual pressure holding, which is similar to the problems encountered by manual pressure-holding fixtures. Spring pressure holding is not easy to adjust the pressure holding, and weight pressure holding will produce a certain impact force that affects the pressure holding parameters. In addition, the cost of pressure-holding equipment is high, which increases the investment cost of product development. Summary of the invention

[0006] The object of the present invention is to provide a pressure holding fixture which is convenient for adjusting the pressure holding parameters.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical scheme: a pressure-maintaining fixture, which includes a base, a placing block and a pressure-maintaining assembly, wherein the placing block is arranged on the base for placing an object to be pressure-maintained, and the pressure-maintaining assembly includes a cover plate, a pressure-maintaining block, a spring, an upper movable block and an adjusting handle, the pressure-maintaining block is aligned up and down with the placing block so that the pressure-maintaining block can press the object to be pressure-maintained, the spring is compressed between the pressure-maintaining block and the upper movable block, the cover plate is located above the upper movable block, the cover plate is provided with an adjusting hole passing through up and down, the inner side wall of the adjusting hole is provided with an internal thread, the adjusting handle includes a screw rod passing through the adjusting hole and a connecting rod connecting the screw and the upper movable block, the screw rod is provided with an external thread meshing with the internal thread, and when the adjusting handle is rotated, the upper movable block moves up and down following the screw rod.

[0008] As a further improved technical solution of the present invention, the pressure maintaining assembly also includes a main body block and an indicator rod fixed to the upper movable block. The outer surface of the main body block is provided with scales spaced apart upper and lower. The indicator rod is used to indicate the scale position corresponding to the upper movable block.

[0009] As a further improved technical solution of the present invention, the pressure maintaining assembly also includes a main body block, which is provided with a movable hole for accommodating the upper movable block and a movable groove penetrating the front end wall surrounding the movable hole, the indicator rod is suspended in the movable groove, and the scale is arranged on the front surface of the front end wall.

[0010] As a further improved technical solution of the present invention, a recess is provided on the lower surface of the upper movable block, and the pressure-maintaining block is partially located in the recess.

[0011] As a further improved technical solution of the present invention, a positioning hole for positioning the lower end of the spring is provided on the upper surface of the pressure maintaining block, and the upper end of the spring abuts against the inner top wall of the recess.

[0012] As a further improved technical solution of the present invention, the pressure-maintaining assembly further comprises a lower movable block located below the upper movable block, the pressure-maintaining block comprises an enlarged portion and a reduced portion extending downward from the enlarged portion, the lower movable block has a through hole for the reduced portion to pass downward, and the enlarged portion is larger than the through hole.

[0013] As a further improved technical solution of the present invention, the enlarged portion is located between the lower movable block and the upper movable block, and is pressed downward against the lower movable block.

[0014] As a further improved technical solution of the present invention, the upper movable block is provided with a connecting groove and a top wall covering the connecting groove, the top wall is provided with a limiting groove penetrating the top wall up and down, the limiting groove and the connecting groove extend forward to the outer side surface of the upper movable block respectively, and the connecting rod is fixedly connected to the limiting groove.

[0015] As a further improved technical solution of the present invention, the connecting rod includes an upper section, a middle section and a lower section connected up and down, the outer diameter of the middle section is smaller than that of the upper section and the lower section, the middle section is located in the limiting groove, the upper section is located above the top wall, and the lower section is located in the connecting groove, and the outer diameters of the upper section and the lower section are both larger than the width of the limiting groove, so as to limit the middle section from detaching from the limiting groove.

[0016] As a further improved technical solution of the present invention, the pressure maintaining assembly also includes a rotating cover rotatably connected to the base and a main block accommodating the spring, the pressure maintaining block and the upper movable block, and the main block is fixed on the rotating cover to follow the movement of the rotating cover.

[0017] As a further improved technical solution of the present invention, the rotating cover includes an upper receiving hole and a lower receiving hole connected up and down, the lower end of the main block is fixed in the upper receiving hole, and the pressure maintaining block passes downward through the lower receiving hole to press the object to be pressurized.

[0018] As a further improved technical solution of the present invention, it also includes a snap assembly, which includes a bracket, a snap arm and a rotating shaft. The bracket is fixed to the front end surface of the base, the snap arm is rotatably connected to the bracket through the rotating shaft, and the snap arm has a snap protrusion for downwardly snapping onto the rotating cover.

[0019] Compared with the prior art, the pressure-maintaining fixture of the present invention has the following advantages:

[0020] The constant holding pressure can be controlled. After the rotating cover is buckled, turn the adjustment handle to adjust the indicator rod to a specific pressure scale position, so that a constant holding pressure can be applied to the object to be held, and the process requirements can be better achieved.

[0021] The holding pressure parameters are adjustable and have strong versatility. The holding pressure parameters can be adjusted by the indicator rod to the scale position of the required holding pressure according to the needs. The specific holding pressure can be determined according to the holding pressure requirements of the object to be held.

[0022] The pressure-maintaining fixture of the present invention has a simple structure, a simple working principle, is easy to operate, is easy to use, has a low cost, and is suitable for small and medium-batch production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the pressure-maintaining fixture of the present invention.

[0024] Figure 2 It is a three-dimensional diagram of the base and the pressure-maintaining assembly of the pressure-maintaining fixture of the present invention separated.

[0025] Figure 3 It is a three-dimensional exploded view of the base and buckle assembly of the pressure-maintaining fixture of the present invention.

[0026] Figure 4 It is a three-dimensional exploded view of the pressure-maintaining assembly of the pressure-maintaining fixture of the present invention.

[0027] Figure 5 yes Figure 4 A further exploded perspective view showing the outer body block separated from the other components.

[0028] Figure 6 yes Figure 5 A further decomposed three-dimensional exploded view shows that the inner body block, the pressure retaining block, and the spring are separated from each other.

[0029] Figure 7 yes Figure 6 Exploded three-dimensional image from another angle.

[0030] Figure 8 yes Figure 6 A three-dimensional exploded view from another angle. DETAILED DESCRIPTION

[0031] See also Figures 1 to 3 As shown, the present invention discloses a pressure-maintaining fixture 100 for maintaining pressure on an object to be pressurized 50 , which includes a base 10 , a placement block 20 , a pressure-maintaining assembly 30 and a buckle assembly 40 .

[0032] An upper groove 11 is provided on the upper surface of the base 10 for accommodating the placement block 20, and the placement block 20 partially protrudes upward from the upper surface of the base 10; a front groove 12 is provided on the front surface of the base 10 for fixing the buckle assembly 40; a rear groove 13 and a fixing plate 14 fixed in the rear groove 13 are provided on the rear surface of the base 10; the fixing plate 14 is upright, and the fixing plate 14 has two protrusions 141 protruding upward from the upper surface of the base 10, the two protrusions 141 are spaced apart from each other, and the two protrusions 141 have first circular holes 142 aligned on the left and right, and the two first circular holes 142 are located above the upper surface of the base 10.

[0033] The upper surface of the placement block 20 is concavely provided with a placement groove 22 for receiving and positioning the object to be pressure maintained 50. The object to be pressure maintained 50 can be completely received in the placement groove 22 and is lower than the upper surface of the placement block 20. The placement groove 22 can be changed in size and shape according to the different objects to be pressure maintained 50 to meet the needs of different objects to be pressure maintained 50. In other embodiments, the placement block 20 is a carrier; the placement block 20 is integrally provided with the base 10.

[0034] See also Figures 4 to 8 As shown, the pressure maintaining assembly 30 includes a rotating cover 31 , a main body block 32 , a cover plate 33 , a lower movable block 34 , a pressure maintaining block 35 , a spring 36 , an upper movable block 37 , an indicator rod 38 and an adjusting handle 39 .

[0035] The pressure-maintaining assembly 30 is rotatably connected to the base 10 through a rotating cover 31. The rotating cover 31 has an open and closed state. When the rotating cover 31 is opened, the placement block 20 is exposed on the upper side of the base 10, making it convenient to place the object 50 to be pressurized in the placement block 20; when the rotating cover 31 is closed, the pressure-maintaining assembly 30 can maintain pressure on the object 50 to be pressurized.

[0036] The rotating cover 31 has a connecting protrusion 311 extending into the two protrusions 141 of the base 10, and the connecting protrusion 311 has a second circular hole 312 aligned with the first circular hole 142. A circular shaft 313 is inserted into the first circular hole 142 and the second circular hole 312 to realize the rotating connection between the rotating cover 31 and the base 10. The rotating cover 31 has an upper receiving hole 314 and a lower receiving hole 315 connected up and down. The upper receiving hole 314 and the lower receiving hole 315 are respectively set in a square shape and are coaxially arranged up and down. The length and width of the upper receiving hole 314 are greater than the length and width of the lower receiving hole 315.

[0037] The length and width of the main block 32 are substantially the same as those of the upper receiving hole 314. The lower end of the main block 32 is fixed in the upper receiving hole 314. The main block 32 is provided with a movable hole 321 penetrating the main block 32 vertically and a movable groove 322 penetrating the front end wall surrounding the movable hole 321. The movable groove 322 penetrates the front end wall vertically, and the front surface of the front end wall is provided with scales 3220 arranged vertically.

[0038] The cover plate 33 covers the upper surface of the main body block 32 . The cover plate 33 is provided with an adjustment hole 330 which passes through the cover plate 33 from top to bottom. The inner wall of the adjustment hole 330 is provided with an internal thread.

[0039] The lower movable block 34, the pressure-maintaining block 35, the spring 36 and the upper movable block 37 are collectively received in the movable hole 321 of the main body block 32. The lower movable block 34 is fixed to the lower surface of the upper movable block 37. The lower movable block 34 has a through hole 340 that passes through the lower movable block 34 from top to bottom. The pressure-maintaining block 35 is T-shaped, and includes an enlarged portion 351 and a reduced portion 352 extending downward from the enlarged portion 351. The reduced portion 352 passes through the through hole 340 and is used to press downward against the object to be pressurized 50. The enlarged portion 351 is located above the lower movable block 34 and has a cross-sectional area larger than the cross-sectional area of ​​the through hole 340, and is used to press downward against the lower movable block 34 to prevent the pressure-maintaining block 35 from moving excessively downward. The pressure-maintaining block 35 can be replaced according to different process requirements and different products to meet different process requirements.

[0040] The spring 36 is compressed between the pressure-maintaining block 35 and the upper movable block 37. The lower surface of the upper movable block 37 is provided with a recess 370 for the expansion portion 351 to move up and down. The upper surface of the expansion portion 351 is provided with a positioning hole 353 for positioning the lower end of the spring 36. The upper end of the spring 36 abuts against the inner top wall of the recess 370. The spring 36 can be replaced according to the required pressure to meet various pressure requirements.

[0041] A connecting groove 371 connected to the adjusting handle 39 and a top wall 372 covering the connecting groove 371 are provided at the top of the upper movable block 37. The top wall 372 is provided with a limiting groove 373 which passes through the top wall 372 from top to bottom. The limiting groove 373 and the connecting groove 371 extend forward to the outer side surfaces (for example, the front end surface, the rear end surface, and the left and right end surfaces) of the upper movable block 37 respectively. In the left and right directions, the width of the limiting groove 373 is smaller than the width of the connecting groove 371.

[0042] One end of the indicator rod 38 is fixed to the front surface of the upper movable block 37, so that the indicator rod 38 can move up and down with the upper movable block 37 and align with different scales 3220. For easy observation, a horizontal linear recess 380 is provided on the front surface of the indicator rod 38; the other opposite end of the indicator rod 38 is suspended in the movable groove 322 of the main block 32.

[0043] The adjustment handle 39 includes a handle portion 391, a screw rod 392, and a connecting rod 393 connected in sequence from top to bottom. The size of the handle portion 391 is larger than that of the screw rod 392, and the handle portion 391 is used for a hand or a tool to hold and rotate the adjustment handle 39. The outer surface of the screw rod 392 has an external thread, and the screw rod 392 is inserted into the adjustment hole 330 of the cover plate 33. The external thread of the screw rod 392 is meshed with the internal thread of the adjustment hole 330, so that the adjustment handle 39 rotates relative to the cover plate 33 and moves up and down at the same time. The connecting rod 393 includes an upper section 3931, a middle section 3932, and a lower section 3933 connected up and down. The outer diameter of the middle section 3932 is smaller than that of the upper section 3931 and the lower section 3933. The middle section 3932 enters the limiting groove 373 from the front side of the upper movable block 37. The upper section 3931 is located above the upper movable block 37, and the lower section 3933 is located in the connecting groove 371. The outer diameters of the upper section 3931 and the lower section 3933 are both larger than the limiting groove 373. With this design, the adjusting handle 39 can drive the upper movable block 37 to move up and down.

[0044] See also Figures 1 to 3 As shown, the buckle assembly 40 includes a bracket 41, a buckle arm 42 and a rotating shaft 43. The bracket 41 is fixed in the front groove 12 of the base 10. The buckle arm 42 is rotatably connected to the bracket 41 through the rotating shaft 43. The upper end of the buckle arm 42 includes a buckle protrusion 420. When the rotating cover 31 is closed, the buckle protrusion 420 is buckled downward on the rotating cover 31 to ensure that the rotating cover 31 is covered on the base 10 without loosening. In other embodiments, the buckle arm 42 is rotatably connected to the base 10, or the buckle assembly 40 is disposed on the pressure-maintaining assembly 30.

[0045] The method for using the pressure-maintaining fixture 100 of the present invention comprises the following steps:

[0046] The object 50 to be pressure-maintained is placed in the placement groove 22 of the placement block 20;

[0047] The rotating cover 31 covers the base 10 downward, and other components of the pressure-maintaining assembly 30 move downward along with the rotating cover 31;

[0048] The buckle arm 42 is rotated, and the buckle protrusion 420 is buckled downward onto the rotating cover 31;

[0049] The adjusting handle 39 is rotated, and the adjusting handle 39 drives the upper movable block 37 to move downward, and the upper movable block 37 presses against the spring 36 to be compressed. The spring 36 applies a pressure F to the object to be pressurized 50 through the pressure-maintaining block 35, where F=k(X2-X1), wherein k is the elastic coefficient of the spring 36, X2 is the scale value of the descending position of the pressure-maintaining block 35, and X1 is the scale value of the initial position;

[0050] After maintaining the pressure for a predetermined time, the rotating adjustment handle 39 is returned to the initial position, the buckle assembly 40 and the rotating cover 31 are opened, and the object to be pressurized 50 is taken out, and the pressurization is completed.

[0051] The pressure-maintaining fixture 100 of the present invention has the following advantages:

[0052] The constant holding pressure can be controlled. After the rotating cover 31 is buckled, the adjusting handle 39 is turned to adjust the indicator rod 38 to the specific pressure scale 3220 position, so that a constant holding pressure can be applied to the object to be held 50, so as to better meet the process requirements.

[0053] The holding pressure parameter is adjustable and has strong versatility. The holding pressure parameter can be adjusted by the indicator rod 38 to the scale position of the required holding pressure according to the demand. The specific holding pressure can be formulated according to the holding pressure demand of the object 50 to be held.

[0054] The pressure-maintaining fixture 100 of the present invention has a simple structure and working principle, is easy to operate, is easy to use, has a low cost, and is suitable for small and medium-batch production lines.

[0055] The above embodiments are only used to illustrate the present invention but not to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technicians in the relevant technical field. For example, the directional descriptions such as "front", "back", "left", "right", "up", and "down" are described in detail in this specification with reference to the above embodiments. However, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A pressure-maintaining fixture, comprising a base, a placement block and a pressure-maintaining assembly, wherein the placement block is arranged on the base and is used to place an object to be pressure-maintained, and is characterized in that: The pressure-maintaining assembly comprises a cover plate, a pressure-maintaining block, a spring, an upper movable block and an adjusting handle, the pressure-maintaining block is aligned with the placing block up and down, so that the pressure-maintaining block can press the object to be pressure-maintained, the spring is compressed between the pressure-maintaining block and the upper movable block, the cover plate is located above the upper movable block, the cover plate is provided with an adjusting hole penetrating up and down, the inner side wall of the adjusting hole is provided with an internal thread, the adjusting handle comprises a screw rod penetrating the adjusting hole and a connecting rod connecting the screw rod and the upper movable block, the screw rod is provided with an external thread meshing with the internal thread, and when the adjusting handle is rotated, the upper movable block moves up and down following the screw rod; The pressure-maintaining assembly further comprises a main body block and an indicator rod fixed to the upper movable block, the outer surface of the main body block is provided with scales spaced apart from each other, and the indicator rod is used to indicate the corresponding scale position of the upper movable block; The main body block is provided with a movable hole for accommodating the upper movable block and a movable groove penetrating through the front end wall surrounding the movable hole, the indicating rod is suspended in the movable groove, and the scale is arranged on the front surface of the front end wall; A concave portion is provided on the lower surface of the upper movable block, and the pressure-maintaining block is partially located in the concave portion; The upper surface of the pressure-maintaining block is provided with a positioning hole for positioning the lower end of the spring, and the upper end of the spring abuts against the inner top wall of the recess; The upper movable block is provided with a connecting groove and a top wall covering the connecting groove, the top wall is provided with a limiting groove penetrating the top wall up and down, the limiting groove and the connecting groove extend forward to the outer side surface of the upper movable block respectively, and the connecting rod is fixedly connected to the limiting groove.

2. The pressure-maintaining fixture according to claim 1, characterized in that: The pressure-maintaining assembly also includes a lower movable block located below the upper movable block, the pressure-maintaining block includes an enlarged portion and a reduced portion extending downward from the enlarged portion, the lower movable block has a through hole for the reduced portion to pass downward, and the enlarged portion is larger than the through hole.

3. The pressure-maintaining fixture according to claim 2, characterized in that: The enlarged portion is located between the lower movable block and the upper movable block, and abuts against the lower movable block downward.

4. The pressure-maintaining fixture according to claim 1, characterized in that: The connecting rod includes an upper section, a middle section and a lower section connected up and down, the outer diameter of the middle section is smaller than that of the upper section and the lower section, the middle section is located in the limiting groove, the upper section is located above the top wall, and the lower section is located in the connecting groove, and the outer diameters of the upper section and the lower section are both larger than the width of the limiting groove, so as to limit the middle section from escaping from the limiting groove.

5. The pressure-maintaining fixture according to claim 1, characterized in that: The pressure-maintaining assembly also includes a rotating cover rotatably connected to the base and a main body block accommodating the spring, the pressure-maintaining block and the upper movable block. The main body block is fixed on the rotating cover to move with the rotating cover.

6. The pressure-maintaining fixture according to claim 5, characterized in that: The rotating cover comprises an upper receiving hole and a lower receiving hole connected up and down, the lower end of the main body block is fixed in the upper receiving hole, and the pressure-maintaining block passes downward through the lower receiving hole to press the object to be pressurized.

7. The pressure-maintaining fixture according to claim 5, characterized in that: It also includes a buckle assembly, which includes a bracket, a buckle arm and a rotating shaft. The bracket is fixed to the front end surface of the base, the buckle arm is rotatably connected to the bracket through the rotating shaft, and the buckle arm has a buckle protrusion for buckling downwardly on the rotating cover.

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