Coil motor pressure testing device

Abstract

The invention discloses a coil motor pressure testing device, which relates to the field of motor coil detection, and is characterized in that a pressure measuring device is arranged at the top of a fixed seat, and the position of the pressure measuring device on the fixed seat is adjustable; the pressure measuring device comprises a dynamometer body and a force measuring probe arranged at the top of the dynamometer body; the pin bounce simulation mechanism comprises a pressure head, a sliding rod, a spring and a mounting seat; one end of the spring is connected with the pressure head, the other end of the spring is connected with the mounting seat, one end, away from the spring, of the mounting seat is detachably connected with the force measuring probe, the sliding rod is fixed at one end, provided with the spring, of the mounting seat, the sliding rod, the spring and the force measuring probe are parallel to one another, and the pressure head slidably penetrates through the sliding rod; one end of the pressure head away from the mounting seat is used for bearing pressure of the to-be-tested coil motor. The testing device can simulate the stress process of pin deformation of the semiconductor device and accurately measure the torsion of the coil motor in the process.

Description

Technical Field

[0001] The present invention relates to the technical field of motor coil detection, and in particular to a coil motor pressure testing device. Background Art

[0002] When testing power semiconductor devices, a coil motor is required to press the device onto a test piece, a slot, a carrier, or other device or material to complete the testing and packaging process. The coil motor presses down very quickly and with great force. If the position of the semiconductor device is offset during the coil motor's pressing process, the pins of the semiconductor device will collide with the device, causing the pins of the semiconductor device to deform. In order to avoid damage to the semiconductor device caused by excessive pressure from the coil motor, it is necessary to accurately test the pressure of the coil motor and control the torque of the coil motor alarm based on the strength data of the semiconductor device pins. When the rebound force of the coil motor when pressed down is greater than the set parameters, the coil motor is controlled to stop pressing down to avoid damage to the semiconductor device.

[0003] In the prior art, the coil motor pressure test is to study how to modify the motor parameters of the coil by simulating the abnormal situation of the semiconductor device sample and checking whether the coil motor torque alarms. On the one hand, the coil motor data obtained by the existing control method is not accurate enough; on the other hand, the vertical pressure applied to the product is obtained by converting the horizontal torque of the coil motor through a torque conversion device, and a test device usually has multiple torque conversion devices. The existing method of modifying the motor parameters of the coil requires a large amount of data simulation, and the simulation results are not accurate enough. If the press is used directly to test the coil motor pressure, the pressure gauge will not produce elastic deformation after the coil motor is pressed down to contact the pressure gauge test head, and the stroke of the coil motor pressing device is limited. At this time, the coil motor pressure measured by the pressure gauge is much smaller than the actual pressure generated by the semiconductor device pin contacting the device. The test data cannot be compared with the semiconductor device pin strength data to set the coil motor alarm lower limit, which will eventually cause the coil motor alarm monitoring function to fail, thereby increasing the risk of semiconductor device abnormality. Summary of the invention

[0004] The invention provides a coil motor pressure testing device, which solves the problem in the prior art that the coil motor torque cannot be accurately measured.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] The present invention provides a coil motor pressure testing device, which includes a pressure measuring device, a fixing seat and a pin rebound force simulation mechanism;

[0007] The pressure measuring device is arranged on the top of the fixing seat, and the position of the pressure measuring device on the fixing seat is adjustable;

[0008] The pressure measuring device comprises a dynamometer body and a force measuring probe arranged on the top of the dynamometer body;

[0009] The pin rebound force simulation mechanism includes a pressure head, a sliding rod, a spring and a mounting seat; one end of the spring is connected to the pressure head, the other end of the spring is connected to the mounting seat, the end of the mounting seat away from the spring is detachably connected to the force measuring probe, the sliding rod is fixed to the mounting seat to set one end of the spring, and the sliding rod, the spring and the force measuring probe are parallel to each other, and the pressure head is slidably inserted on the sliding rod; the end of the pressure head away from the mounting seat is used to bear the pressure of the coil motor to be measured.

[0010] In a possible implementation, the distance between the pin rebound force simulation mechanism and the top of the dynamometer body is greater than or equal to 0.5 mm.

[0011] In a possible implementation, there are two sliding rods, and the two sliding rods are symmetrically arranged on both sides of the spring.

[0012] In a possible implementation, a first screw hole for connecting with the force measuring probe is formed at one end of the mounting seat, and a fixing groove for fixing the spring is formed at the other end of the mounting seat.

[0013] In a possible implementation, a second screw hole is formed on the mounting seat and located on a side wall of the fixing groove, and a fixing screw for fixing the spring is passed through the second screw hole.

[0014] In a possible implementation, the pressure head and the sliding rod are connected via a roller bearing.

[0015] In a possible implementation, the pressure measuring device is a digital force gauge or a force sensor.

[0016] In a possible implementation, the fixing base includes a test base and an adjustment bracket;

[0017] The test base is used to support the adjustment bracket and is also used to adjust the height of the adjustment bracket;

[0018] The adjustment bracket is used to fix the dynamometer and also to adjust the position of the dynamometer in the horizontal direction.

[0019] In a possible implementation, the test base includes a fixing plate and a plurality of first screws passing through the fixing plate;

[0020] A countersunk hole is formed at one end of the fixing plate away from the adjusting bracket corresponding to the first screw rod, one end of the first screw rod is located in the countersunk hole, and the other end of the first screw rod is threadedly connected to the adjusting bracket.

[0021] In a possible implementation, the adjustment bracket includes a rectangular fixed frame, each side wall of the rectangular fixed frame is provided with a long limiting hole along its length direction, and a mounting screw hole matching the first screw is provided on the bottom plate of the rectangular fixed frame; a second screw is vertically passed through each of the long limiting holes, and fixing nuts are provided on both sides of the second screw on the long limiting holes, and one end of the second screw passed through the rectangular fixed frame is used to abut the dynamometer.

[0022] When the coil motor pressure testing device provided by the embodiment of the present invention is actually used, the horizontal position of the pressure head is made to coincide with the required position of the coil motor to be tested. After the test starts, the rotational torque of the coil motor to be tested is converted into a vertical downward pressure through the mechanical device of the tested equipment and acts on the pressure head of the pin rebound force simulation mechanism. The pressure head slides downward along the sliding rod under the force, and the spring is continuously compressed during the sliding process of the pressure head. At this time, the rebound force on the coil motor to be tested gradually increases. After the rebound force exceeds the torque set by the coil motor to be tested itself, the pressure is stopped. At this time, the pressure measured by the dynamometer is the maximum pressure applied to the pressure head, that is, the maximum pressure of the motor coil to be tested. The coil motor pressure testing device of the present invention can simulate the force process of pin deformation of semiconductor devices, and accurately measure the torque of the coil motor in this process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the overall structure of a coil motor pressure testing device provided by an embodiment of the present invention;

[0024] Figure 2 A schematic structural diagram of a pressure measuring device for a coil motor pressure testing device provided by an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a pin rebound force simulation mechanism of a coil motor pressure testing device provided by an embodiment of the present invention;

[0026] Figure 4 A schematic structural diagram of a test base of a coil motor pressure test device provided by an embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of an adjustment bracket of a coil motor pressure testing device provided in an embodiment of the present invention.

[0028] Reference numerals and descriptions:

[0029] 1. Pressure measuring device; 11. Dynamometer body; 12. Force measuring probe; 2. Fixing seat; 21. Test base; 211. Fixing plate; 212. First screw rod; 22. Adjusting bracket; 221. Rectangular fixing frame; 222. Long limit hole; 223. Second screw rod; 224. Fixing nut; 225. Mounting screw hole; 3. Pin rebound force simulation mechanism; 31. Pressure head; 32. Sliding rod; 33. Spring; 34. Mounting seat; 35. Fixing nut. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "multiple" means two or more. In addition, the use of "based on" or "according to" means openness and inclusiveness, because the process, steps, calculations or other actions "based on" or "according to" one or more of the conditions or values ​​may be based on additional conditions or values ​​beyond the described values ​​in practice.

[0032] In order to solve the problem in the prior art that the torque of a coil motor cannot be accurately measured, an embodiment of the present invention provides a coil motor pressure testing device.

[0033] like Figure 1 to Figure 3 As shown, a coil motor pressure testing device provided by an embodiment of the present invention includes a pressure measuring device 1, a fixing seat 2 and a pin rebound force simulation mechanism 3.

[0034] The pressure measuring device 1 is arranged on the top of the fixing seat 2, and the position of the pressure measuring device 1 on the fixing seat 2 is adjustable.

[0035] The pressure measuring device 1 is fixed on the top of the fixing seat 2 by screws and mechanical limiters.

[0036] The pressure measuring device 1 includes a dynamometer body 11 and a dynamometer probe 12 disposed on the top of the dynamometer body 11 .

[0037] The pin rebound force simulation mechanism 3 and the force measuring probe 12 are detachably connected by threaded engagement, and the pin rebound force simulation mechanism 3 is fixed on the top of the pressure measuring device 1 .

[0038] Furthermore, the distance between the pin rebound force simulation mechanism 3 and the top of the dynamometer body 11 is greater than or equal to 0.5 mm.

[0039] Furthermore, the pressure measuring device 1 is a digital force gauge or a force sensor.

[0040] Specifically, the measuring range of the pressure measuring device 1 needs to be selected according to the torque range of the coil motor to be tested. The overall size of the pressure measuring device 1 is generally less than 120*30*60mm. A smaller-sized pressure measuring device 1 can ensure that the overall structural size of the entire coil motor pressure testing device is smaller.

[0041] If the smallest digital dynamometer is still too large for the coil motor to be tested, a force sensor can be used to achieve pressure measurement to improve test suitability.

[0042] The pin rebound force simulation mechanism 3 includes a pressing head 31 , a sliding rod 32 , a spring 33 and a mounting seat 34 .

[0043] One end of the spring 33 is connected to the pressure head 31, and the other end of the spring 33 is connected to the mounting seat 34. The end of the mounting seat 34 away from the spring 33 is detachably connected to the force measuring probe 12, and the slide bar 32 is fixed to the mounting seat 34 to set one end of the spring 33, and the slide bar 32, the spring 33 and the force measuring probe 12 are parallel to each other, and the pressure head 31 is slidably arranged on the slide bar 32.

[0044] One end of the pressure head 31 away from the mounting seat 34 is used to bear the pressure of the coil motor to be tested, that is, the end of the pressure head 31 away from the mounting seat 34 is the contact end of the pressure of the coil motor to be tested.

[0045] Specifically, the spring 33 and the force measuring probe 12 are on the same straight line, and the sliding rod 32 is parallel to the spring 33 to limit the movement direction of the spring 33 .

[0046] Furthermore, a first screw hole for connecting with the force measuring probe 12 is formed at one end of the mounting seat 34 , and a fixing groove for fixing the spring 33 is formed at the other end of the mounting seat 34 .

[0047] In this embodiment, the first screw hole opened at the bottom of the mounting seat 34 is an M6 internal thread hole, which is used to cooperate with the external thread on the top of the force measuring probe 12 to fix the pin rebound force simulation mechanism 3 on the top of the pressure measuring device 1.

[0048] The fixing groove on the top of the mounting seat 34 has a diameter of 5 mm, and a cylinder with a diameter of 3 mm*3 mm is arranged at the bottom center of the fixing groove. The end of the spring 33 extends into the fixing groove and is sleeved on the outside of the cylinder to fix the spring 33.

[0049] Furthermore, on the mounting seat 34 , a second screw hole is opened on the side wall of the fixing groove, and a fixing screw for fixing the spring 33 is passed through the second screw hole.

[0050] In this embodiment, two second screw holes are symmetrically arranged on both sides of the fixing groove on the mounting seat 34 , and the second screw holes are abutted against each other by M3 screws, or the spring 33 is abutted against the cylinder to further fix the spring 33 .

[0051] The bottom of the pressure head 31 fixes the other end of the spring 33 in the same manner to ensure that the spring 33 is vertical.

[0052] Furthermore, there are two slide bars 32 , and the two slide bars 32 are symmetrically arranged on both sides of the spring 33 .

[0053] In this embodiment, the top end of the slide rod 32 is connected to the pressure head 31, and the bottom end is connected to the mounting seat 34. The slide rod 32 is a stainless steel guide rod with a diameter of 3mm*50mm and a smooth surface. The two slide rods 32 are symmetrically arranged on both sides of the spring 33 to limit the movement direction of the spring 33.

[0054] Furthermore, the pressure head 31 and the slide rod 32 are connected by a roller bearing to ensure that when the pressure head 31 is subjected to external force, the slide rod 32 remains unchanged, and the pressure head 31 can move smoothly downward along the direction of the slide rod 32, thereby ensuring that the spring 33 is compressed vertically downward.

[0055] Furthermore, the fixing base 2 includes a test base 21 and an adjustment bracket 22 .

[0056] The test base 21 is used to support the adjustment bracket 22 and to adjust the height of the adjustment bracket 22 .

[0057] The adjustment bracket 22 is used to fix the dynamometer and to adjust the position of the dynamometer in the horizontal direction.

[0058] like Figure 4 As shown, further, the test base 21 includes a fixing plate 211 and a plurality of first screw rods 212 passing through the fixing plate 211 .

[0059] A countersunk hole is formed at one end of the fixing plate 211 away from the adjusting bracket 22 and corresponding to the first screw rod 212 . One end of the first screw rod 212 is located in the countersunk hole, and the other end of the first screw rod 212 is threadedly connected to the adjusting bracket 22 .

[0060] In an embodiment of the present invention, the fixing plate 211 is a rectangular aluminum plate of 90*120*10mm, which has sufficient weight to ensure the stability of the overall structure of the coil motor pressure testing device, and will not cause the device to tilt or tip over during testing. Countersunk holes are provided at the four corner positions at the bottom of the fixing plate 211, and the first screw rods 212 are four M6 screws that cooperate with the countersunk holes.

[0061] By adjusting the length of the four M6 screws extending out of the fixing plate 211 , the overall height of the adjustment bracket 22 can be adjusted, thereby achieving height matching with the coil motor to be tested.

[0062] like Figure 5 As shown, further, in order to prevent the test base 21 from being uneven, when adjusting the height, the screw head of the first screw rod 212 cannot exceed the height of the countersunk hole.

[0063] Furthermore, the adjustment bracket 22 includes a rectangular fixed frame 221 , each side wall of the rectangular fixed frame 221 is provided with a long limiting hole 222 along its length direction, and a mounting screw hole 225 cooperating with the first screw rod 212 is provided on the bottom plate of the rectangular fixed frame 221 .

[0064] A second screw rod 223 is vertically passed through each long limiting hole 222 , and fixing nuts 35224 are provided on both sides of the second screw rod 223 . One end of the second screw rod 223 passing through the rectangular fixing frame 221 is used to abut against the dynamometer.

[0065] In the embodiment of the present invention, the adjustment bracket 22 is composed of a rectangular aluminum material of 90*120*40mm, and a space of 80*110*30mm is dug out in the center of the aluminum material as a horizontal movement space for the pressure measuring device 1. Long limit holes 222 are opened on the four side walls of the rectangular fixed frame 221 along the length direction of the side walls.

[0066] The second screw rod 223 is an M6 screw, which is inserted into the long limiting hole 222. The two fixing nuts 35224 limit the position of each M6 screw at the long limiting hole 222, and the M6 ​​screw extends into the inner length of the adjustment bracket 22. The end of the M6 ​​screw extends into the adjustment bracket 22 and abuts against the pressure measuring device 1.

[0067] Two second screws 223 are provided on each long side wall of the rectangular fixed frame 221 , and one second screw 223 is provided on each short side wall of the rectangular fixed frame 221 . The position of the pressure measuring device 1 in the central space of the aluminum material is limited by the six second screws 223 .

[0068] When the coil motor pressure testing device provided by the embodiment of the present invention is used in actual applications, a pin rebound force simulation mechanism 3 of appropriate size and measurement range is selected according to the test requirements and installed on the top of the pressure measuring device 1, and the height of the pressure head 31 of the pin rebound force simulation mechanism 3 is matched with the height of the coil motor under test by adjusting the first screw 212; and the horizontal position of the pressure head 31 is matched with the horizontal position of the coil motor under test by adjusting the second screw 223.

[0069] After the horizontal position of the pressure head 31 is made to coincide with the required position of the coil motor to be tested, after the test begins, the rotational torque of the coil motor to be tested is converted into a vertical downward pressure through the mechanical device of the tested equipment and acts on the pressure head 31 of the pin rebound force simulation mechanism 3. The pressure head 31 slides downward along the slide bar 32 under the force, and the spring 33 is continuously compressed during the sliding process of the pressure head 31. At this time, the rebound force on the coil motor to be tested gradually increases. When the rebound force exceeds the torque set by the coil motor to be tested itself, the pressure is stopped. At this time, the pressure measured by the dynamometer is the maximum pressure applied to the pressure head 31, that is, the maximum pressure of the motor coil to be tested.

[0070] The coil motor pressure testing device of the present invention can simulate the stress-bearing process of semiconductor device pin deformation and accurately measure the coil motor torque in the process.

[0071] Furthermore, by comparing the pin strength parameters of the semiconductor device and the maximum pressure of the coil motor to be tested measured by the coil motor pressure testing device of the present invention, it is possible to analyze and determine whether the parameters set for the coil motor to be tested are suitable for the semiconductor device we are comparing.

[0072] By continuously modifying the parameter settings of the coil motor to be tested and repeating the test, a set of test data is obtained. Each test data includes: set pressure data and its corresponding measured pressure data. By comparing the functional relationship presented by this set of test data, the capabilities of the coil motor to be tested can be further understood, and ultimately the purpose of guiding the selection of coil motors and achieving fine control of the coil motor pressure in the processing process can be achieved, thereby solving the quality risk of pin deformation in semiconductor devices and improving product quality.

[0073] In other words, the coil motor pressure testing device of the present invention can completely solve the problem that the torque of the coil motor installed on the power semiconductor device cannot be finely controlled. It can quantitatively evaluate the torque control accuracy of the coil motor, guide equipment suppliers to select coil motors, and solve the motor pressure control problem in the product processing process, identify equipment risks in advance, reduce equipment research and development costs, and improve product processing quality.

[0074] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A coil motor pressure testing device, characterized in that: It includes a pressure measuring device, a fixing seat and a tube foot rebound force simulation mechanism; The pressure measuring device is arranged on the top of the fixing seat, and the position of the pressure measuring device on the fixing seat is adjustable; The pressure measuring device comprises a dynamometer body and a force measuring probe arranged on the top of the dynamometer body; The pin rebound force simulation mechanism includes a pressure head, a sliding rod, a spring and a mounting seat; one end of the spring is connected to the pressure head, the other end of the spring is connected to the mounting seat, the end of the mounting seat away from the spring is detachably connected to the force measuring probe, the sliding rod is fixed to the mounting seat to set one end of the spring, and the sliding rod, the spring and the force measuring probe are parallel to each other, and the pressure head is slidably inserted on the sliding rod; the end of the pressure head away from the mounting seat is used to bear the pressure of the coil motor to be measured.

2. The coil motor pressure testing device according to claim 1, characterized in that: The distance between the pin rebound force simulation mechanism and the top of the dynamometer body is greater than or equal to 0.5 mm.

3. The coil motor pressure testing device according to claim 2, characterized in that: There are two sliding rods, and the two sliding rods are symmetrically arranged on both sides of the spring.

4. The coil motor pressure testing device according to claim 3, characterized in that: A first screw hole for connecting with the force measuring probe is provided at one end of the mounting seat, and a fixing groove for fixing the spring is provided at the other end of the mounting seat.

5. The coil motor pressure testing device according to claim 4, characterized in that: On the mounting seat, a second screw hole is provided on the side wall of the fixing groove, and a fixing screw for fixing the spring is passed through the second screw hole.

6. The coil motor pressure testing device according to claim 5, characterized in that: The pressure head is connected to the slide rod via a roller bearing.

7. The coil motor pressure testing device according to claim 1, characterized in that: The pressure measuring device is a digital force gauge or a force sensor.

8. The coil motor pressure testing device according to claim 1, characterized in that: The fixing seat comprises a test base and an adjustment bracket; The test base is used to support the adjustment bracket and is also used to adjust the height of the adjustment bracket; The adjustment bracket is used to fix the dynamometer and also to adjust the position of the dynamometer in the horizontal direction.

9. The coil motor pressure testing device according to claim 8, characterized in that: The test base includes a fixing plate and a plurality of first screws passing through the fixing plate; A countersunk hole is formed at one end of the fixing plate away from the adjusting bracket corresponding to the first screw rod, one end of the first screw rod is located in the countersunk hole, and the other end of the first screw rod is threadedly connected to the adjusting bracket.

10. The coil motor pressure testing device according to claim 9, characterized in that: The adjustment bracket includes a rectangular fixing frame, each side wall of the rectangular fixing frame is provided with a long limiting hole along its length direction, and a mounting screw hole matching the first screw is provided on the bottom plate of the rectangular fixing frame; a second screw is vertically passed through each of the long limiting holes, and fixing nuts are provided on both sides of the second screw on the long limiting holes, and one end of the second screw passing through the rectangular fixing frame is used to abut the dynamometer.

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